Maretron Computer Monitor ACM100 User Manual

®
ACM100  
Alternating Current Monitor  
Users Manual  
Revision 1.2  
Copyright © 2012 Maretron, LLP All Rights Reserved  
Maretron, LLP  
9014 N. 23rd Ave #10  
Phoenix, AZ 85021-7850  
Maretron Manual Part #: M001701  
Revision 1.2  
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Table of Contents  
2.4.1 NMEA 2000® Connection............................................................................... 3  
Table of Figures  
Figure 2 – NMEA 2000® Connector Face Views ....................................................................... 4  
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1 Introduction  
Congratulations on your purchase of the Maretron Alternating Current (AC) Monitor (ACM100).  
Maretron has designed and built your ACM100 to the highest standards for years of  
dependable and accurate service.  
Maretron’s ACM100 is a device which monitors AC power sources and outputs information  
about these sources onto the industry standard NMEA 2000® marine data network. ACM100  
output information is then displayed with networked NMEA 2000® equipment such as the  
Maretron DSM250 dedicated display or with NMEA 2000® compatible software such as  
Maretron N2KView. The ACM100 can sense voltages up to 240VAC (line-to-neutral) and  
currents up to 200A.  
The Maretron ACM100 is designed to operate within the harsh demands of the marine  
environment. However, no piece of marine electronic equipment can function properly unless  
installed, configured, and maintained in the correct manner. Please read carefully and follow  
these instructions for installation, configuration, and usage of the Maretron ACM100 in order to  
ensure optimal performance.  
1.1 Firmware Revision  
This manual corresponds to ACM100 firmware revision 1.0.0.  
1.2 ACM100 Features  
The Maretron ACM100 has the following features.  
NMEA 2000® Interface  
Waterproof Connectors  
Sealed Waterproof Enclosure  
Opto-Isolated from NMEA 2000® Eliminating Potential Ground Loops  
Monitoring of busses carrying AC power and transmitting  
o Voltage  
o Frequency  
Monitoring AC Power Sources such as Utilities and Generators and transmitting:  
o Voltage  
o Current  
o Frequency  
o Real Power  
o Reactive Power  
o Apparent Power  
o Power Factor  
o Total Energy Imported  
o Total Energy Exported  
Can be used in the following configurations  
o 120VAC single phase  
o 120/240VAC split-phase  
o 208VAC Y Three-phase (208Y)  
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o 230VAC single phase  
o 380VAC Y Three-phase (380Y)  
1.3 Quick Install  
Installing the Maretron ACM100 involves the following five steps. Please refer to the individual  
sections for additional details.  
1. Unpack the box (Section 2.1)  
2. Choose a mounting location (Section 2.2)  
3. Mount the ACM100 (Section 2.3)  
4. Connect the ACM100 (Section 0)  
5. Configure the ACM100 (Section 2.5)  
2 Installation  
2.1 Unpacking the Box  
When unpacking the box containing the Maretron ACM100, you should find the following  
items:  
1 – ACM100 – AC Monitor  
1 – AC Current Transformer with 5 ft. (1.5m) long cable (Part # M000630)  
1 – Parts Bag containing 4 Stainless Steel Mounting Screws  
1 – ACM100 User’s Manual  
1 – Warranty Registration Card  
If any of these items are missing or damaged, please contact Maretron.  
2.2 Choosing a Mounting Location  
Please consider the following when choosing a mounting location.  
1. The ACM100 is waterproof, so it can be mounted in a damp or dry location.  
2. The orientation is not important, so the ACM100 can be mounted on a horizontal deck,  
vertical bulkhead, or upside down if desired.  
3. The ACM100 is temperature rated to 55°C (130°F), so it should be mounted away from  
engines or engine rooms where the operating temperature exceeds the specified limit.  
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2.3 Mounting the ACM100  
Attach the ACM100 securely to the vessel using the included stainless steel mounting screws  
or other fasteners as shown in Figure 1 below. Do not use threadlocking compounds  
containing methacrylate ester, such as Loctite Red (271), as they will cause stress cracking of  
the plastic enclosure.  
Figure 1 – Mounting the ACM100  
2.4 Connecting the ACM100  
The ACM100 requires two types of electrical connections: 1) the NMEA 2000® connection  
(refer to Section 2.4.1), and 2) the AC sensor connections (i.e., current sensor(s) and sensing  
voltage(s) connections), which are described in Section 2.4.2.  
2.4.1 NMEA 2000® Connection  
The NMEA 2000® connector can be found on the side of the enclosure. The NMEA 2000®  
connector is a round five pin male connector (see Figure 2). You connect the ACM100 to an  
NMEA 2000® network using a Maretron NMEA 2000® cable (or compatible cable) by  
connecting the female end of the cable to the ACM100 (note the key on the male connector  
and keyway on the female connector). Be sure the cable is connected securely and that the  
collar on the cable connector is tightened firmly. Connect the other end of the cable (male) to  
the NMEA 2000® network in the same manner. The ACM100 is designed such that you can  
plug or unplug it from an NMEA 2000® network while the power to the network is connected or  
disconnected. Please follow recommended practices for installing NMEA 2000® network  
products.  
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Figure 2 – NMEA 2000® Connector Face Views  
2.4.2 AC Sensor Connections  
The ACM100 sensor connections are made by connecting to the 12-pin terminal strip on the  
top of the unit. First, remove the four screws at the corners of the unit detaching the splash  
guard from the unit. On the bottom of the splash guard, you will find a label detailing the wire  
connection to pin number assignments, which are repeated in the table below.  
Pin #  
Signal Name  
Connection  
1
Voltage Phase A Line  
Voltage Phase B Line  
Voltage Phase C Line  
Voltage Phase A Neutral  
Voltage Phase B Neutral  
Voltage Phase C Neutral  
Current Phase A Plus  
Current Phase A Minus  
Current Phase B Plus  
Current Phase B Minus  
Current Phase C Plus  
Current Phase C Minus  
VA  
Line  
2
3
VB  
Line  
VC  
Line  
4
VA  
Neutral  
5
VB  
Neutral  
6
VC  
Neutral  
7
IA+  
IA-  
8
9
IB+  
IB-  
10  
11  
12  
IC+  
IC-  
WARNING: The voltages present on AC circuits can cause electrocution.  
Before making any electrical connections to the ACM100, ensure that power is  
removed from all AC circuits that will be connected to the ACM100. Only restore  
AC power after all connections have been made to the ACM100 and the splash  
guard has been re-installed.  
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WARNING: If the supplied current transformer is placed around a wire carrying  
AC current, then extremely high voltages can develop on the output leads of the  
current transformer, with severe risk of electrocution. For safety, keep the output  
leads of the current transformer(s) shorted or tied together until they are  
connected to the proper terminals on the ACM100.  
WARNING: User supplied voltage sense cables must be 18 gauge or larger,  
have insulation rated to 600V, and must have the conductor connected to the  
hot lead of the AC power source protected by a fuse rated at 3A or less (the  
current consumed by the voltage sense circuit on the ACM100 is negligible, at  
less than 10mA).  
Before attempting to connect the ACM100 to the AC source, determine the type of system you  
will be monitoring. The ACM100 supports the connection and monitoring of three different  
system types; 1) single-phase single line system (Section 2.4.2.1), or 2) single-phase dual line  
system (Section 2.4.2.2), or 3) three-phase system (Section 2.4.2.3).  
2.4.2.1 Single-Phase (Phase A) Connection  
Please refer to Figure 3 for connecting the ACM100 to a single phase, single line system.  
Current  
Transducer  
Line (Phase A)  
+
+
U.S.  
120 Volts  
60Hz  
Europe  
220 Volts  
50Hz  
AC Source  
-
-
Neutral  
ACM100 Screw Terminals  
1
2
3
4
5
6
7
8
9 10 11 12  
Figure 3 – Single-Phase (Single Line) Connection Diagram  
Use the following instructions when you are connecting the ACM100 to a single-phase circuit  
connected via one (hot) phase wire and one neutral wire. You will need to install one current  
transformer and one voltage sense cable.  
Step 1: De-energize the AC Source.  
Step 2: The Current Transformer has black and white wires. Install the Current Transformer as  
follows:  
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a. Connect the black wire to pin 7 (IA+) on the ACM100  
b. Connect the white wire to pin 8 (IA-) on the ACM100  
c. Disconnect the hot wire from the AC power source and place it through the hole in  
the Current Sensor such that the arrow on the Current Sensor points towards the AC  
power source. Then, reattach the hot wire to the AC source.  
Step 3: You must supply a cable for connecting the voltage sense pins on the ACM100 to the  
AC source. For the purposes of these instructions, we will assume that the cable has one black  
conductor and one white conductor. Install the voltage sense cable as follows:  
a. Connect the white wire from one end of the Voltage Sense cable to pin 4 (VANeutral  
on the ACM100.  
)
b. Connect the white wire from the other end of the Voltage Sense cable to the neutral  
wire of the AC source being monitored.  
c. Connect the black wire from one end of the Voltage Sense cable to pin 1 (VALine) on  
the ACM100  
d. Connect the black wire from the other end of the Voltage Sense cable to a fuse  
appropriately sized for the black wire (18 gauge wire minimum and 3 amp fuse or  
less).  
e. Connect the other end of the fuse to the AC source hot wire (the fuse should be  
placed within 6 inches of the connection to the hot wire).  
2.4.2.2 Single-Phase (Phase A, B) Connection  
Please refer to Figure 4 for connecting the ACM100 to a single phase, dual line system.  
Current  
Transformer  
Line (Phase B)  
Current  
Transformer  
Line (Phase A)  
+
+
U.S.  
120 Volts  
60Hz  
Europe  
220 Volts  
50Hz  
-
-
Neutral  
ACM100 Screw Terminals  
1
2
3
4
5
6
7
8
9 10 11 12  
Figure 4 – Single-Phase (Dual Line) Connection Diagram  
Use the following instructions when you are connecting the ACM100 to a single-phase circuit  
connected via two hot wires. You will need to install two current transformer and two user-  
supplied voltage sense cables. The ACM100 comes with a single current transformer so you  
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will need to purchase an optional current sensor (Part # M000630) for monitoring this type of  
system.  
Step 1: De-energize the AC Source.  
Step 2: The Current Transformer has black and white wires. Install the Phase A Current  
Transformer as follows:  
a. Connect the black wire to pin 7 (IA+) on the ACM100  
b. Connect the white wire to pin 8 (IA-) on the ACM100  
c. Disconnect the Phase A hot wire from the AC power source and place it through the  
hole in the Current Sensor such that the arrow on the Current Sensor points towards  
the AC power source. Then, reattach the hot wire to the AC power source.  
Step 3: Repeat step 2 for the Phase B Current Transformer as follows:  
a. Connect the black wire to pin 9 (IB+) on the ACM100  
b. Connect the white wire to pin 10 (IB-) on the ACM100  
c. Disconnect the Phase B hot wire from the AC power source and place it through the  
hole in the Current Sensor such that the arrow on the Current Sensor points towards  
the AC power source. Then, reattach the hot wire to the AC power source.  
Step 4: You must supply cables for connecting the voltage sense pins on the ACM100 to the  
AC source. For the purposes of these instructions, we will assume that each cable has one  
black conductor and one white conductor. Install the first voltage sense cable as follows:  
a. Connect the white wire from one end of the first Voltage Sense cable to pin 4  
(VANeutral) on the ACM100.  
b. Connect the white wire from the other end of the first Voltage Sense cable to the  
neutral wire of the AC source being monitored  
c. Connect the black wire from one end of the first Voltage Sense cable to pin 1 (VALine  
on the ACM100  
)
d. Connect the black wire from the other end of the first Voltage Sense cable to a fuse  
appropriately sized for the black wire (18 gauge wire minimum and 3 amp fuse or  
less).  
e. Connect the other end of the fuse to the AC source hot wire (the fuse should be  
placed within 6 inches of the connection to the hot wire).  
Step 5: Install the second Voltage Sense cable as follows:  
a. Connect the white wire from one end of the second Voltage Sense cable to pin 5  
(VBNeutral) on the ACM100.  
b. Connect the white wire from the other end of the second Voltage Sense cable to the  
neutral wire of the AC source being monitored.  
c. Connect the black wire from one end of the second Voltage Sense cable to pin 2  
(VBLine) on the ACM100  
d. Connect the black wire from the other end of the second Voltage Sense cable to a  
fuse appropriately sized for the black wire (18 gauge wire minimum and 3 amp fuse  
or less).  
e. Connect the other end of the fuse to the AC source hot wire (the fuse should be  
placed within 6 inches of the connection to the hot wire).  
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2.4.2.3 Three-Phase (Phase A, B, C) Connection  
Please refer to Figure 5 for connecting the ACM100 to a three phase system.  
Current  
Transducer  
Line (Phase C)  
Current  
Transducer  
Line (Phase B)  
Current  
Transducer  
Line (Phase A)  
+
+
U.S.  
120 Volts  
60Hz  
Europe  
220 Volts  
50Hz  
-
-
Neutral  
ACM100 Screw Terminals  
1
2
3
4
5
6
7
8
9 10 11 12  
Figure 5 – Three-Phase Connection Diagram  
Use the following instructions when you are connecting the ACM100 to a three-phase “Wye”  
circuit connected via three hot wires and a single neutral (NOTE: Three-phase delta connected  
circuits are not supported by the ACM100). You will need to install three current transformers  
and three user-supplied voltage sense cables. The ACM100 comes with a single current  
transformer so you will need to purchase two optional current sensors (Part # PCT-1000-101-  
03) for monitoring this type of system.  
Step 1: De-energize the AC Source.  
Step 2: The Current Transformer has black and white wires. Install the first Current  
Transformer as follows:  
a. Connect the black wire to pin 7 (IA+) on the ACM100  
b. Connect the white wire to pin 8 (IA-) on the ACM100  
c. Disconnect the Phase A hot wire from the AC power source and place it through the  
hole in the Current Sensor such that the arrow on the Current Sensor points towards  
the AC power source. Then, reattach the Phase A hot wire to the AC power source.  
Step 3: Install the second Current Transformer as follows:  
a. Connect the black wire to pin 9 (IB+) on the ACM100  
b. Connect the white wire to pin 10 (IB-) on the ACM100  
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c. Disconnect the Phase B hot wire from the AC power source and place it through the  
hole in the Current Sensor such that the arrow on the Current Sensor points towards  
the AC power source. Then, reattach the Phase B hot wire to the AC power source.  
Step 4: Install the third Current Transformer as follows:  
a. Connect the black wire to pin 11 (IC+) on the ACM100  
b. Connect the white wire to pin 12 (IC-) on the ACM100  
c. Disconnect the Phase C hot wire from the AC power source and place it through the  
hole in the Current Sensor such that the arrow on the Current Sensor points towards  
the AC power source. Then, reattach the Phase C hot wire to the AC power source.  
Step 5: You must supply a cable for connecting the voltage sense pins on the ACM100 to the  
AC source. For the purposes of these instructions, we will assume that the cable has one black  
conductor and one white conductor. Install the voltage sense cable as follows:  
a. Connect the white wire from one end of the Voltage Sense cable to pin 4 (VANeutral  
on the ACM100.  
)
b. Connect the white wire from the other end of the Voltage Sense cable to the neutral  
wire of the AC source being monitored.  
c. Connect the black wire from one end of the Voltage Sense cable to pin 1 (VALine) on  
the ACM100  
d. Connect the black wire from the other end of the Voltage Sense cable to a fuse  
appropriately sized for the black wire (18 gauge wire minimum and 3 amp fuse or  
less).  
e. Connect the other end of the fuse to the AC source hot wire (the fuse should be  
placed within 6 inches of the connection to the hot wire).  
Step 6: Install the second Voltage Sense cable as follows:  
a. Connect the white wire from one end of the second Voltage Sense cable to pin 5  
(VBNeutral) on the ACM100.  
b. Connect the white wire from the other end of the second Voltage Sense cable to the  
neutral wire of the AC source being monitored.  
c. Connect the black wire from one end of the second Voltage Sense cable to pin 2  
(VBLine) on the ACM100  
d. Connect the black wire from the other end of the second Voltage Sense cable to a  
fuse appropriately sized for the black wire (18 gauge wire minimum and 3 amp fuse  
or less).  
e. Connect the other end of the fuse to the AC source hot wire (the fuse should be  
placed within 6 inches of the connection to the hot wire).  
Step 7: Install the third Voltage Sense cable as follows:  
a. Connect the white wire from one end of the second Voltage Sense cable to pin 6  
(VCNeutral) on the ACM100.  
b. Connect the white wire from the other end of the second Voltage Sense cable to the  
neutral wire of the AC source being monitored.  
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c. Connect the black wire from one end of the second Voltage Sense cable to pin 3  
(VCLine) on the ACM100  
d. Connect the black wire from the other end of the second Voltage Sense cable to a  
fuse appropriately sized for the black wire (18 gauge wire minimum and 3 amp fuse  
or less).  
e. Connect the other end of the fuse to the AC source hot wire (the fuse should be  
placed within 6 inches of the connection to the hot wire).  
2.4.3 Checking Connections  
Once the NMEA 2000® connection, Current Sensor(s), and Voltage Sense connection(s) to the  
ACM100 have been completed, restore power to the monitored AC source and check to see  
that information is being properly transmitted by observing an appropriate NMEA 2000®  
display. If you don’t see AC power data, refer to Section 5, “Troubleshooting”.  
2.5 Configuring the ACM100  
The ACM100 will transmit data over the NMEA 2000 network as it is shipped from the factory;  
however, it may require configuration, depending on the type of AC source being monitored.  
There are several configurable items within the ACM100, which are detailed in the remainder  
of this section.  
You configure the ACM100 using a Maretron DSM250 display or other NMEA 2000® display  
unit that is capable of configuring the ACM100. Please refer to the Maretron DSM250 User’s  
Manual for details.  
2.5.1 Device Instance  
NMEA 2000® provides a unique AC power instance for each AC power source on a vessel.  
This value should be programmed in each ACM100 so that each ACM100 is associated with a  
unique device instance number. The default instance number is 0, which is used to indicate the  
first ACM100 that is hooked to the network. Subsequent ACM100s connected to the network  
would be numbered 1, 2, and so on.  
2.5.2 AC Device Type  
You must configure the ACM100 as to what type of AC source it is monitoring. The allowable  
values for this parameter are as follows:  
“Generator” (default) – use this value when you are monitoring the output of a genset.  
“Utility” – use this value when you are monitoring shore power  
“Bus” – use this value if you are monitoring power flowing across a cable that is not  
located directly at the output of a genset or a shore power connection (e.g., an AC  
selection switch might have as an input the shore power and another input from the  
genset, connecting the ACM100 at the output of the AC selection switch would require  
the ACM100 to be configured as “Bus”.  
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2.5.3 AC Circuit Type  
You must configure the ACM100 as to what type of AC circuit connection it is monitoring. The  
allowable values for this parameter are as follows:  
Single-Phase (Phase A) – use this value when power is connected via a single hot wire  
and a single neutral wire (a typical 110VAC connection in the US).  
Single-Phase (Phase A, B) – use this value when power is connected via the two hot  
wires and single neutral wire from a single phase of a transformer (a typical 220VAC  
connection in the US).  
Three-Phase (Phase A, B, C) – use this value when power is connected via the three  
hot wires and single neutral wire from a three-phase “Wye” connected circuit.  
2.5.4 Reset Total Energy Recorded  
The ACM100 accumulates the total energy imported from a Utility and exported from a  
generator. Select this option to zero the total energy accumulated readings in the ACM100.  
2.5.5 Advanced Configuration…  
Certain parameters do not normally need to be set in order for normal operation, but are  
included in an advanced configuration section for use in special situations.  
2.5.5.1 Device Priority  
If you have only one ACM100 on a particular AC power source, you should leave the priority  
selection at the default value of 0. However, NMEA 2000® can provide a unique priority for  
allowing multiple, redundant sensors for a single AC power source on a vessel. Redundant  
sensors for a single AC power source should have the same device instance number and  
different priority selections. If you have redundant sensors on a single AC power source, you  
should leave the primary sensor at its default priority value of 0, and program the secondary  
sensor with a priority value of 1.  
2.5.5.2 V,I,F Damping Period  
If you feel that the monitored Voltage, Current, and Frequency parameters are changing too  
quickly or too slowly on the display, you can adjust the damping that is applied to the output  
readings by adjusting this parameter. The default damping period is 0.5 seconds. You may  
change it to a value in the range of 0.2 seconds to 10 seconds.  
2.5.5.3 Power Damping Period  
If you feel that the monitored Power parameters are changing too quickly or too slowly on the  
display, you can adjust the damping that is applied to the output readings by adjusting this  
parameter. The default damping period is 5 seconds. You may change it to a value in the  
range of 0.2 seconds to 10 seconds.  
2.5.5.4 Current Transformer A  
If you notice that the current of phase A is negative when it should be positive, or vice-versa,  
then the current transformer has been installed backwards. If this happens, then instead of  
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reconnecting the current transformer, you may change the value of this parameter from the  
default value of “Normal Install” to “Inverse Install” to correct for this.  
2.5.5.5 Current Transformer B  
If you notice that the current of phase B is negative when it should be positive, or vice-versa,  
then the current transformer has been installed backwards. If this happens, then instead of  
reconnecting the current transformer, you may change the value of this parameter from the  
default value of “Normal Install” to “Inverse Install” to correct for this.  
2.5.5.6 Current Transformer C  
If you notice that the current of phase C is negative when it should be positive, or vice-versa,  
then the current transformer has been installed backwards. If this happens, then instead of  
reconnecting the current transformer, you may change the value of this parameter from the  
default value of “Normal Install” to “Inverse Install” to correct for this.  
2.5.6 NMEA 2000® PGN Enable/Disable  
The ACM100 is capable of transmitting many different kinds of NMEA 2000® messages (or  
PGNs) associated with AC power sources. You may individually enable or disable each of  
these messages. You may also change the rate of transmission of each of these messages if  
desired.  
2.5.7 Restore Factory Defaults  
Selecting this configuration option causes all stored parameters in the ACM100 to be reset to  
the values they contained when the unit was manufactured.  
3 Output Parameters  
The ACM100 outputs a variety of information about the AC power source onto the NMEA 2000  
network. The tables below detail which measurements are made available on the bus for the  
different combinations of different AC source types and circuit types which may be selected.  
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3.1 Line-Specific and Line-to-Neutral Measurements  
AC Source Type  
Available Data  
Parameter  
Bus  
Generator  
Utility  
Average Phase A Phase B Phase C  
Line-Neutral AC  
RMS Voltage  
AC RMS Current  
AC Frequency  
Real Power  
Apparent Power  
Reactive Power  
Power Factor  
Total kW Hours  
Export  
9
9
9
9
9
9
91  
92  
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
91  
91  
91  
91  
91  
91  
92  
92  
92  
92  
92  
92  
9
9
9
9
9
9
Total kW Hours  
Import  
Notes:  
1.  
2.  
Available only if circuit type has been set to “Single-Phase (Phase A,B)” or  
“Three-Phase (Phase A,B,C)”  
Available only if circuit type has been set to “Three-Phase (Phase A,B,C)”  
3.2 Line-to-Line Measurements  
AC Source Type  
Parameter  
Available Data  
Phase A Phase B Phase C  
to to to  
Phase B Phase C Phase A  
Bus  
Generator  
Utility  
Average  
Line-Line AC RMS  
Voltage  
9
9
9
9
91 92 92  
Notes:  
1.  
2.  
Available only if circuit type has been set to “Single-Phase (Phase A,B)” or  
“Three-Phase (Phase A,B,C)”  
Available only if circuit type has been set to “Three-Phase (Phase A,B,C)”  
4 Maintenance  
Regular maintenance is important to ensure continued proper operation of the Maretron  
ACM100. Perform the following tasks periodically:  
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Clean the unit with a soft cloth. Do not use chemical cleaners as they may remove  
paint or markings or may corrode the ACM100 enclosure or seals. Do not use any  
cleaners containing acetone, as they will deteriorate the plastic enclosure.  
Ensure that the unit is mounted securely and cannot be moved relative to the mounting  
surface. If the unit is loose, tighten the mounting screws.  
Check the security of the cable connected to the NMEA 2000® connector, and tighten if  
necessary.  
Check the security of all of the current sensor connections and voltage sensor  
connections on the top of the unit and tighten if necessary.  
5 Troubleshooting  
If you notice unexpected operation of the Maretron ACM100, follow the troubleshooting  
procedures in this section to remedy simple problems. If these steps do not solve your  
problem, please contact Maretron Technical Support (refer to Section 7 for contact  
information).  
Symptom  
Troubleshooting Procedure  
No AC power data  
visible on NMEA 2000®  
network.  
Ensure that the ACM100 is properly connected to the NMEA 2000®  
network.  
Ensure that the current transformers and voltage sense cables are  
properly connected to the ACM100.  
Ensure that the ACM100 has the appropriate NMEA 2000® PGNs  
enabled as described in Section 2.5.6.  
Exported power is  
increasing when it  
shouldn’t be  
The current transformer(s) are installed backwards. Either 1)  
reinstall the current transformers in the opposite direction of 2)  
configure the ACM100 to recognize the reversed installation as  
described in Sections 2.5.5.4, 2.5.5.5, and 2.5.5.6.  
Imported power in not  
increasing when it  
should be  
Currents are showing as  
negative values when  
they should be showing  
as positive values  
Power readings are not  
what I expect  
Please review carefully the installation instructions in Section 0 and  
the configuration of the circuit type in Section 2.5.3.  
Page 14  
Revision 1.2  
 
   
®
6 Technical Specifications  
As Maretron is constantly improving its products, all specifications are subject to change  
without notice. Maretron products are designed to be accurate and reliable; however, they  
should be used only as aids to navigation and not as a replacement for traditional navigation  
aids and techniques.  
Certifications  
Parameter  
Comment  
NMEA 2000®  
Level A  
Maritime Navigation and Radiocommunication Equipment & Systems  
FCC and CE Mark  
IEC 60945  
Electromagnetic Compatibility  
NMEA 2000® Parameter Group Numbers (PGNs)  
Description  
PGN #  
65001  
65002  
65003  
65004  
65005  
65006  
65007  
65008  
65009  
65010  
65011  
65012  
65013  
65014  
65015  
65016  
65017  
65018  
65019  
65020  
65021  
65022  
65023  
65024  
65025  
65026  
65027  
65028  
65029  
65030  
PGN Name  
Default Rate  
Periodic Data PGNs  
Bus #1 Phase C Basic AC Quantities  
Bus #1 Phase B Basic AC Quantities  
Bus #1 Phase A Basic AC Quantities  
Bus #1 Average Basic AC Quantities  
Utility Total AC Energy  
Utility Phase C AC Reactive Power  
Utility Phase C AC Power  
Utility Phase C AC Basic Quantities  
Utility Phase B AC Reactive Power  
Utility Phase B AC Power  
Utility Phase B AC Basic Quantities  
Utility Phase A AC Reactive Power  
Utility Phase A AC Power  
Utility Phase A AC Basic Quantities  
Utility Total AC Reactive Power  
Utility Total AC Power  
Utility Average Basic AC Quantities  
Generator Total AC Energy  
Generator Phase C AC Reactive Power  
Generator Phase C AC Power  
Generator Phase C AC Basic Quantities  
Generator Phase B AC Reactive Power  
Generator Phase B AC Power  
Generator Phase B AC Basic Quantities  
Generator Phase A AC Reactive Power  
Generator Phase A AC Power  
Generator Phase A AC Basic Quantities  
Generator Total AC Reactive Power  
Generator Total AC Power  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
10 times/second  
N/A  
Generator Average Basic AC Quantities  
Response to Requested PGNs  
Protocol PGNs  
126464 PGN List (Transmit and Receive)  
126996 Product Information  
126998 Configuration Information  
059392 ISO Acknowledge  
059904 ISO Request  
N/A  
N/A  
N/A  
N/A  
060928 ISO Address Claim  
065240 ISO Address Command  
126208 NMEA  
N/A  
N/A  
N/A  
Maretron Proprietary PGNs  
128720 Configuration  
N/A  
Revision 1.2  
Page 15  
 
 
ACM100 User’s Manual  
Electrical  
Parameter  
Value  
0-240 VAC  
0-200 A  
5 to 36 Volts  
100 mA  
2
Comment  
120,120/240,240,208Y,380Y configurations  
With supplied current transformer  
DC Voltage  
Sensed Voltage  
Sensed Current  
Operating Voltage  
Power Consumption  
Load Equivalence Number (LEN)  
Reverse Battery Protection  
Load Dump Protection  
NMEA 2000® Interface  
NMEA 2000® Spec. (1LEN = 50 mA)  
Indefinitely  
Yes  
Yes  
Energy Rated per SAE J1113  
Mechanical  
Parameter  
Size  
Value  
3.50” x 4.20” x 2.03”  
Comment  
Including Flanges for Mounting  
(88.9mm x 106.7mm x 51.6mm)  
Weight  
13 oz. (368.5 g)  
Environmental  
Parameter  
Value  
Exposed  
IP64  
IEC 60954 Classification  
Degree of Protection  
Operating Temperature  
Storage Temperature  
Relative Humidity  
-25°C to 55°C  
-40°C to 70°C  
93%RH @40° per IEC60945-8.2  
Vibration  
Solar Radiation  
2-13.2Hz @ ±1mm, 13.2-100Hz @ 7m/s2 per IEC 60945-8.7  
Ultraviolet B, A, Visible, and Infrared per IEC 60945-8.10  
Corrosion (Salt Mist)  
Electromagnetic Emission  
Electromagnetic Immunity  
Safety Precautions  
4 times 7days @ 40°C, 95%RH after 2 hour Salt Spray Per IEC 60945-8.12  
Conducted and Radiated Emission per IEC 60945-9  
Conducted, Radiated, Supply, and ESD per IEC 60945-10  
Dangerous Voltage, Electromagnetic Radio Frequency per IEC 60945-12  
7 Technical Support  
If you require technical support for Maretron products, you can reach us in any of the following  
ways:  
Telephone: 1-866-550-9100  
Fax: 1-602-861-1777  
Mail: Maretron, LLC  
Attn: Technical Support  
9014 N. 23rd Ave Suite 10  
Phoenix, AZ 85021 USA  
Page 16  
Revision 1.2  
 
   
®
8 Installation Template  
Please check the dimensions before using the following diagram as a template for drilling the  
mounting holes because the printing process may have distorted the dimensions.  
Figure 6 – Mounting Surface Template  
Revision 1.2  
Page 17  
 
 
ACM100 User’s Manual  
9 Maretron (2 Year) Limited Warranty  
Maretron warrants the ACM100 to be free from defects in materials and workmanship for two (2) years from the  
date of original purchase. If within the applicable period any such products shall be proved to Maretron’s  
satisfaction to fail to meet the above limited warranty, such products shall be repaired or replaced at Maretron’s  
option. Purchaser's exclusive remedy and Maretron’s sole obligation hereunder, provided product is returned  
pursuant to the return requirements below, shall be limited to the repair or replacement, at Maretron’s option, of  
any product not meeting the above limited warranty and which is returned to Maretron; or if Maretron is unable to  
deliver a replacement that is free from defects in materials or workmanship, Purchaser’s payment for such  
product will be refunded. Maretron assumes no liability whatsoever for expenses of removing any defective  
product or part or for installing the repaired product or part or a replacement therefore or for any loss or damage  
to equipment in connection with which Maretron’s products or parts shall be used. With respect to products not  
manufactured by Maretron, Maretron’s warranty obligation shall in all respects conform to and be limited to the  
warranty actually extended to Maretron by its supplier. The foregoing warranties shall not apply with respect to  
products subjected to negligence, misuse, misapplication, accident, damages by circumstances beyond  
Maretron’s control, to improper installation, operation, maintenance, or storage, or to other than normal use or  
service.  
THE FOREGOING WARRANTIES ARE EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER EXPRESS OR  
IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF  
MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE.  
Statements made by any person, including representatives of Maretron, which are inconsistent or in conflict with  
the terms of this Limited Warranty, shall not be binding upon Maretron unless reduced to writing and approved by  
an officer of Maretron.  
IN NO CASE WILL MARETRON BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, DAMAGES  
FOR LOSS OF USE, LOSS OF ANTICIPATED PROFITS OR SAVINGS, OR ANY OTHER LOSS INCURRED  
BECAUSE OF INTERRUPTION OF SERVICE. IN NO EVENT SHALL MARETRON’S AGGREGATE LIABILITY  
EXCEED THE PURCHASE PRICE OF THE PRODUCT(S) INVOLVED. MARETRON SHALL NOT BE SUBJECT  
TO ANY OTHER OBLIGATIONS OR LIABILITIES, WHETHER ARISING OUT OF BREACH OF CONTRACT OR  
WARRANTY, TORT (INCLUDING NEGLIGENCE), OR OTHER THEORIES OF LAW WITH RESPECT TO  
PRODUCTS SOLD OR SERVICES RENDERED BY MARETRON, OR ANY UNDERTAKINGS, ACTS OR  
OMISSIONS RELATING THERETO.  
Maretron does not warrant that the functions contained in any software programs or products will meet  
purchaser’s requirements or that the operation of the software programs or products will be uninterrupted or error  
free. Purchaser assumes responsibility for the selection of the software programs or products to achieve the  
intended results, and for the installation, use and results obtained from said programs or products. No  
specifications, samples, descriptions, or illustrations provided Maretron to Purchaser, whether directly, in trade  
literature, brochures or other documentation shall be construed as warranties of any kind, and any failure to conform  
with such specifications, samples, descriptions, or illustrations shall not constitute any breach of Maretron’s limited  
warranty.  
Warranty Return Procedure:  
To apply for warranty claims, contact Maretron or one of its dealers to describe the problem and determine the  
appropriate course of action. If a return is necessary, place the product in its original packaging together with  
proof of purchase and send to an Authorized Maretron Service Location. You are responsible for all shipping and  
insurance charges. Maretron will return the replaced or repaired product with all shipping and handling prepaid  
except for requests requiring expedited shipping (i.e. overnight shipments). Failure to follow this warranty return  
procedure could result in the product’s warranty becoming null and void.  
Maretron reserves the right to modify or replace, at its sole discretion, without prior notification, the warranty listed  
above. To obtain a copy of the then current warranty policy, please go to the following web page:  
Page 18  
Revision 1.2  
 
 
®
Appendix A – NMEA 2000® Interfacing  
ACM100 NMEA 2000® Periodic Data Transmitted PGNs  
PGN 65001 – Bus #1 Phase C Basic AC Quantities  
PGN 65002 – Bus #1 Phase B Basic AC Quantities  
PGN 65003 – Bus #1 Phase A Basic AC Quantities  
PGN 65004 – Bus #1 Average Basic AC Quantities  
PGN 65008 – Utility Phase C Basic AC Quantities  
PGN 65011 – Utility Phase B Basic AC Quantities  
PGN 65014 – Utility Phase A Basic AC Quantities  
PGN 65017 – Utility Average Basic AC Quantities  
PGN 65021 – Generator Phase C Basic AC Quantities  
PGN 65024 – Generator Phase B Basic AC Quantities  
PGN 65027 – Generator Phase A Basic AC Quantities  
PGN 65030 – Generator Average Basic AC Quantities  
The ACM100 uses these PGN to transmit voltage, frequency, and current information  
Field 1: Line-Line AC RMS Voltage – This field indicates the AC RMS voltage between this  
phase and the next phase in units of 1 V.  
2: Line-Neutral AC RMS Voltage – This field indicates the AC RMS voltage between  
this phase and the neutral phase in units of 1 V.  
3: AC Frequency – This field indicates the frequency of the AC voltage in units of 1/128  
Hz.  
4: AC RMS Current (not transmitted for the “Bus” AC Source Type) – This field indicates  
the current flowing through the specified phase in units of 1 A.  
PGN 65006 – Utility Phase C AC Reactive Power  
PGN 65009 – Utility Phase B AC Reactive Power  
PGN 65012 – Utility Phase A AC Reactive Power  
PGN 65015 – Utility Total AC Reactive Power  
PGN 65019 – Generator Phase C AC Reactive Power  
PGN 65022 – Generator Phase B AC Reactive Power  
PGN 65025 – Generator Phase A AC Reactive Power  
PGN 65028 – Generator Total AC Reactive Power  
The ACM100 uses this PGN to transmit reactive power and power factor information.  
Field 1: Reactive Power – This field indicates the reactive power delivered by the source in  
units of 1 VAr.  
2: Power Factor – This field indicates the magnitude of the power factor supplied by the  
source in units of 1/16384 (dimensionless).  
3: Power Factor Lagging – This field indicates whether the specified power factor is  
lagging or leading.  
Revision 1.2  
Appendix A – NMEA 2000 Interfacing  
Page A1  
 
ACM100 User’s Manual  
PGN 65005 – Utility Total AC Energy  
PGN 65018 – Generator Total AC Energy  
The ACM100 uses this PGN to transmit the total energy delivered by the power source.  
Field 1: Total kWh Hours Export – This field indicates the total energy delivered by the AC  
power source in units of 1 kWh.  
2: Total kWh Hours Import – This field indicates the total energy delivered to the AC  
power source in units of 1 kWh.  
PGN 65007 – Utility Phase C AC Power  
PGN 65010 – Utility Phase B AC Power  
PGN 65013 – Utility Phase A AC Power  
PGN 65016 – Utility Total AC Power  
PGN 65020 – Generator Phase C AC Power  
PGN 65023 – Generator Phase B AC Power  
PGN 65026 – Generator Phase A AC Power  
PGN 65029 – Generator Total AC Power  
The ACM100 uses these PGNs to transmit the total real power and apparent power (the vector  
sum of real power and reactive power).  
Field 1: Real Power – This field indicates the real power delivered by the AC power source in  
units of 1W.  
2: Apparent Power – This field indicates the apparent power delivered by the AC power  
source in units of 1 VA.  
Page A2  
Appendix A – NMEA 2000 Interfacing  
Revision 1.2  
 

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