Maretron DCM100-01 User manual

Revision 1.5 Page i
DCM100
DC Monitor
User’s Manual
Revision 1.5
Copyright © 2015 Maretron, LLP All Rights Reserved
Maretron, LLP
9014 N. 23rd Ave #10
Phoenix, AZ 85021-7850
http://www.maretron.com
Maretron Manual Part #: M000026

DCM100 User’s Manual
Page ii Revision 1.5
Revision History
Revision
Description
1.0
Original document
1.1
Added cautions about using red Loctite and acetone cleaners
1.2
Corrected voltage specifications for VPWR+, VPWR- power supply
1.3
Removed Priority information (obsolete)
Removed invalid reference to engine instance
Added information on configuring different sensor types
Added documentation on advanced configuration menu items
1.4
Corrected voltage specifications in text
Updated specification table
1.5
Added connection diagram
Added warning about replacing blown fuses with fuses of same value

Revision 1.5 Page iii
Table of Contents
1Introduction ...........................................................................................................................1
1.1 Firmware Revision.................................................................................................... 1
1.2 DCM100 Features.................................................................................................... 1
1.3 Quick Install.............................................................................................................. 1
2Installation.............................................................................................................................2
2.1 Unpacking the Box ................................................................................................... 2
2.2 Choosing a Mounting Location................................................................................. 2
2.3 Mounting the DCM100.............................................................................................. 2
2.4 Connecting the DCM100.......................................................................................... 3
2.4.1 Connecting the DCM100 NMEA 2000®Interface........................................... 3
2.4.2 Connecting the DC power and Sensor Connections...................................... 4
2.4.3 Checking Connections................................................................................... 6
2.5 Configuring the DCM100.......................................................................................... 6
2.5.1 Instance Selection ......................................................................................... 7
2.5.2 DC Type ........................................................................................................ 7
2.5.3 Battery-Specific Options ................................................................................ 7
2.5.3.1 Battery Type..................................................................................... 7
2.5.3.2 Battery Capacity............................................................................... 7
2.5.3.3 Nominal Voltage............................................................................... 7
2.5.3.4 Equalization ..................................................................................... 7
2.5.3.5 Temperature Coefficient................................................................... 7
2.5.3.6 Peukert Exponent............................................................................. 8
2.5.3.7 Charge Efficiency Factor.................................................................. 8
2.5.3.8 Fully Charged Voltage...................................................................... 8
2.5.3.9 Fully Charged Current...................................................................... 8
2.5.3.10Fully Charged Time.......................................................................... 8
2.5.3.11Battery Temperature........................................................................ 8
2.5.3.12Time Remaining Floor...................................................................... 8
2.5.3.13Time Remaining Averaging Period................................................... 9
2.5.3.14Zero Current Threshold.................................................................... 9
2.5.3.15Current Sensor Zero Offset Calibration............................................ 9
2.5.4 Advanced....................................................................................................... 9
2.5.4.1 Current Sensor Type........................................................................ 9
2.5.4.2 Device Instance ............................................................................... 9
2.5.4.3 Installation Description… ................................................................. 9
2.5.4.4 NMEA 2000®PGN Enable/Disable.................................................. 9
2.5.4.5 Restore Factory Defaults ................................................................. 9
3Output Parameters..............................................................................................................10
3.1 Parameters Common to DC Sources and Batteries............................................... 10
3.1.1 Battery Voltage............................................................................................ 10
3.1.2 Battery Current ............................................................................................ 10
3.1.3 Ripple Voltage ............................................................................................. 10
3.1.4 Parameters Specific to Batteries.................................................................. 10
3.1.5 Battery Case Temperature........................................................................... 10
3.1.6 State of Charge............................................................................................ 10

DCM100 User’s Manual
Page iv Revision 1.5
3.1.7 Time Remaining........................................................................................... 10
4Background.........................................................................................................................11
4.1 Why Monitor Batteries?.......................................................................................... 11
4.2 Batteries................................................................................................................. 11
4.3 Battery Capacity..................................................................................................... 11
4.4 Battery Types......................................................................................................... 11
4.5 Battery Safety Precautions..................................................................................... 12
4.6 Charging Inefficiencies........................................................................................... 12
4.6.1 Charge Efficiency Factor (CEF)................................................................... 12
4.7 Discharging Inefficiencies....................................................................................... 12
4.8 Peukert Exponent................................................................................................... 12
5Synchronization...................................................................................................................13
5.1 Charge Efficiency Factor Calculation...................................................................... 13
6Maintenance........................................................................................................................13
7Troubleshooting ..................................................................................................................14
8Technical Specifications......................................................................................................15
9Technical Support ...............................................................................................................16
10 Installation Template...........................................................................................................17
11 Maretron (2 Year) Limited Warranty....................................................................................18
Table of Figures
Figure 1 –Mounting the DCM100.............................................................................................. 3
Figure 2 –NMEA 2000®Connector Face Views ....................................................................... 4
Figure 3 –Connection Diagram................................................................................................. 6
Figure 4 –Mounting Surface Template ................................................................................... 17
Table of Appendices
Appendix A –NMEA 2000®Interfacing Translations............................................................... A1

Revision 1.5 Page 1
1 Introduction
Congratulations on your purchase of the Maretron DC Monitor (DCM100). Maretron has
designed and built your DC monitor to the highest standards for years of dependable and
accurate service.
Maretron’s DCM100 is a device which monitors DC power sources or batteries and outputs
information about these sources onto the industry standard NMEA 2000® marine data network
so that these data can be monitored with networked NMEA 2000®displays such as the Maretron
DSM150 or DSM250 or with NMEA 2000®compatible software such as Maretron N2KView.
The Maretron DCM100 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 DCM100 in order to
ensure optimal performance.
1.1 Firmware Revision
This manual corresponds to DCM100 firmware revision 1.0.2.
1.2 DCM100 Features
The Maretron DCM100 has the following features.
NMEA 2000®Interface
Waterproof Connectors
Sealed Waterproof Enclosure
Opto-Isolated from NMEA 2000®Eliminating Potential Ground Loops
Can monitor DC Power Sources, Transmitting Voltage and Current
Can monitor Lead Acid and Gel Batteries, Transmitting Voltage, Current, Temperature,
and State of Charge
Uses Peukert’s Constant and Charge Efficiency Factor for Accurate State of Charge
Calculation
Can Calculate Charge Efficiency Factor Based on Observed Battery Performance
1.3 Quick Install
Installing the Maretron DCM100 DC monitor 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 DCM100 (Section 2.3)
4. Connect the DCM100 (Section 2.4)
5. Configure the DCM100 (Section 2.5)
6. Synchronize the DCM100 with the battery (Section 2.6)

DCM100 User’s Manual
Page 2Revision 1.5
2 Installation
2.1 Unpacking the Box
When unpacking the box containing the Maretron DCM100, you should find the following items:
1 –DCM100 –DC Monitor
1 –DC Current Sensor with 5 ft. long cable (Part # LEMHTA200-S) (outer cable covering grey)
1 –Battery Temperature Sensor with 5 ft. long cable (Part # TR3K) (outer cable covering grey)
1 –Battery Voltage Sense Cable, 5 ft. long (Part # FC01) (outer cable covering white)
1 –Power Cable, 5 ft. long (Part # FC01) (outer cable covering white)
1 –Parts Bag containing 4 Stainless Steel Mounting Screws
1 –DCM100 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
The DCM100 should be mounted near the monitored source of DC power. Please consider the
following when choosing a mounting location.
1. The DCM100 is waterproof, so it can be mounted in a damp or dry location.
2. The orientation is not important, so the DCM100 can be mounted on a horizontal deck,
vertical bulkhead, or even upside down if desired.
3. The DCM100 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.
2.3 Mounting the DCM100
Attach the DCM100 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.

Revision 1.5 Page 3
Figure 1 –Mounting the DCM100
2.4 Connecting the DCM100
The DCM100 requires two electrical connections. Refer to Section 2.4.1 for making the NMEA
2000®connection and Section 2.4.2 for making the DC monitor connections (i.e., current sensor,
sensing voltage, and temperature sensor connections)..
2.4.1 Connecting the DCM100 NMEA 2000®Interface
Vertical text on the DCM100 label identifies the NMEA 2000®connector. With the label right side
up, the NMEA 2000®connector can be found on the right side of the enclosure. The NMEA
2000®connector is a five pin male connector (see Figure 2). You connect the DCM100 to an
NMEA 2000®network using a Maretron NMEA 2000®cable (or compatible cable) by connecting
the female end of the cable to the DCM100 (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 DCM100 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.

DCM100 User’s Manual
Page 4Revision 1.5
Figure 2 –NMEA 2000®Connector Face Views
2.4.2 Connecting the DC power and Sensor Connections
The DCM100’s DC Power and 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
securing the splash guard to 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 Number
Signal Name
Connection
1
IA
Current Sensor, Red Wire
2
IB
Current Sensor, Green Wire
3
IC
Current Sensor, Black Wire
4
ID
Current Sensor, White Wire
5
VSENS+
Battery, + Terminal
6
VSENS-
Battery, - Terminal
7
VPWR-
Vessel Ground
8
VPWR+
9-32 VDC Power
9
No Connect
10
No Connect
11
TA
Temperature Sender, Red Wire
12
TB
Temperature Sender, Black Wire
Step 1: The Current Sensor (LEMHTA200-S) has a gray cable containing red, green, black, and
white wires. Install the Current Sensor as follows:
a. Connect the red wire to pin 1 (IA) on the DCM100
b. Connect the green wire to pin 2 (IB) on the DCM100
c. Connect the black wire to pin 3 (IC) on the DCM100
d. Connect the white wire to pin 4 (ID) on the DCM100

Revision 1.5 Page 5
e. Disconnect the wire from the positive terminal of the battery or other DC source that
is being monitored and place it through the hole in the Current Sensor such that the
arrow on the Current Sensor points towards the battery or DC source. Then, reattach
the wire to the positive terminal of the battery or other DC source.
Step 2: The temperature sensor (TR3K) has a gray cable containing red and black wires.
Connect the Temperature Sensor as follows:
a. Connect the red wire to pin 11 (TA) on the DCM100
b. Connect the black wire to pin 12 (TB) on the DCM100
c. Connect the ring terminal on the Temperature Sensor to the negative terminal of the
battery being monitored
Step 3: The Battery Sense cable (FC01) is a white cable containing one red and one yellow wire
(please note that the same type of cable is used both for the Battery Sense cable and for the
Power cable). Install the Battery Sense cable as follows:
a. Connect the yellow wire from one end of the cable to pin 6 (VSENS-) on the DCM100.
b. Connect the yellow wire from the other end of the cable to the negative terminal of the
battery or DC source being monitored (NOTE: this may or may not be the same as
the vessel ground –this terminal either must be at the same voltage as pin 7 (VPWR-)
or must have a positive voltage with respect to pin 7 (VPWR-))
c. Connect the red wire from the first end of the cable to pin 5 (VSENS+) on the DCM100
d. Connect the red wire from the other end of the cable to the positive terminal of the
battery or DC source being monitored
Step 4: The Power cable (FC01) is a white cable containing one red and one yellow wire. Note
that this power cable is essential to operation since it provides power for the DCM100 to function.
Install the DCM100 power cable as follows:
a. Connect the yellow wire from one end of the cable to pin 7 (VPWR-) on the DCM100.
(NOTE: this terminal either must be at the same voltage as pin 6 (VSENS-) or must have
a negative voltage with respect to pin 6 (VSENS-))
b. Connect the yellow wire from the other end of the cable to the vessel ground
c. Connect the red wire from the first end of the cable to pin 8 (VPWR+) on the DCM100.
d. Connect the red wire from the other end of the cable to a source of 9-32 VDC power
(NOTE: this wire may nor may not be connected to the same place as the red wire
from the Battery Sense cable).
WARNING
The FC01 cables are shipped with 1 Ampere fuses installed. If one of these
fuses should burn out, replace it only with another 1 Ampere fuse. Using a
larger amperage fuse could cause damage to the unit.

DCM100 User’s Manual
Page 6Revision 1.5
Figure 3 –Connection Diagram
2.4.3 Checking Connections
Once the NMEA 2000®, Current Sensor, Temperature Sensor, Voltage Sense, and DC Power
connections to the DCM100 have been completed, check to see that information is being
properly transmitted by observing an appropriate NMEA 2000®display. If you don’t see DC
power data, refer to Section 7, “Troubleshooting”.
2.5 Configuring the DCM100
The DCM100 will transmit data over the NMEA 2000 network as it is shipped from the factory;
however, it does require configuration in almost all cases for proper functioning. There are
several configurable items within the DCM100, including: 1) NMEA 2000®DC power instance
selection, 2) DC Type, 3) Battery Type, 4) Battery Capacity, 5) Nominal Voltage. 6) Equalization,
7) Temperature Coefficient, 8) Peukert Exponent, 9) Charge Efficiency Factor, 10) Fully Charged
Voltage, 11) Fully Charged Current. 12) Fully Charged Time. 13) Battery Temperature, 14) Time
Remaining Floor, 15) Time Remaining Averaging Period, 16) Zero Current Threshold, 17)
Manually Set Battery to 100%, 18) Current Sensor Zero Offset Calibration, and 19) NMEA 2000
PGN Enable/Disable.
You configure the ACM100 using Maretron N2KAnalyzer®software or a Maretron
DSM150/DSM250 display. Please refer to the N2KAnalyzer User’s Manual, DSM150 User’s
Manual, or DSM250 User’s Manual, as appropriate, for details.
9–32 VDC
Power
+
-
Battery or DC Source
(0 –50 VDC)
1
2
5
4
3
6
7
8
9
10
11
12
IA
ID
Hall Effect Current Sensor
(Point Arrow towards
battery/source)
DCM100 Screw Terminals
IB
IC
VSENS+
VSENS-
VPWR-
VPWR+
N.C.
N.C.
TB+
TB-
Fuse
TR3K Ring/Under
Bolt Probe (Connect
to Negative Battery
Terminal)
Red
Black
Red
Green
Black
White
Red
Yellow
Yellow
Red
+
-
Fuse
Load