Maretron LP-200012UL User Manual

Installation Instructions

LP-200012UL Gas Detector

Instructions

Please follow these instructions to connect the LP-200012UL to the NMEA 2000 network via a Maretron SIM100
Switch Indicator Module. The wiring diagram appears in Figure 1 on the reverse side of this page. The diagram
shows a connection to channel #1, but connections to other channels are similar.

1. Connect the LP-200012UL power terminals to a 12VDC supply that is independent of the NMEA 2000
network power supply, as shown in Figure 1. Powering the unit separately from the NMEA 2000 network
allows the detector to work even when the NMEA 2000 network is powered off.

2. Connect the two alarm contact terminals to a free switch channel on the SIM100. The example in Figure 1
shows the detector connected to switch channel 1, terminals SW1A and SW1B. Note: The detector’s
protective cover must be removed to perform this function.

3. Use a Maretron DSM250 display (firmware 1.3.5 or higher), the DSM250 Viewing function of Maretron
N2KAnalyzer software, or other Maretron display product capable of configuring the SIM100 to set the

switch channel mode (indicated as “Channel #x Mode” on the DSM250) for the appropriate channel to the

“End of Line Resistor” setting. For this example, you would set “Channel #1 Mode” to “End of Line
Resistor”.

4. Supply Power to the NMEA 2000 network and to the LP-200012UL and verify that the switch channel
indicates an “off” (normal) state using Maretron N2KView software, N2KAnalyzer, or other product
capable of displaying switch indicator state.

5. Perform a test using a gas source (cigarette lighter without a flame) applied in front of the LP-200012UL
and verify that the switch channel indicates an “on” (alarm) state during the test.

6. Disconnect either of the two alarm wires between the LP-200012UL and the SIM100 and verify that the
switch channel indicates an “error” state.

7. Reconnect the alarm wires to the SIM100 and verify that the switch channel indicates an “off” (normal)
state.

WARNING: The LP-200012UL is shipped with an 8KΩ end-of-line resistor installed between the

alarm contact terminals. Do not remove the resistor; it allows an indication if the wires are
inadvertently disconnected between the LP-200012UL and the SIM100.

(continued on reverse)

Copyright © 2011 Maretron, LLP All Rights Reserved P/N: M001807 Rev.1.3 1/11

LP-200012UL Shown with Cover Removed

Alarm

Contacts

3 4 5 6

1 2 5 4 3 6 7 8 9 10 11 12

Power

+ -

SIM100 Screw Terminals

12 VDC

Factory-installed
8KΩ end-of-line
resistor

SW1A SW2B

SW1B SW2A SW3A SW3B SW4A SW4B SW5A SW5B SW6A SW6B

For installation support, please contact:

Telephone: [phone]

E-mail: [e-mail]

Web: http://www.maretron.com

Figure 1 - Wiring Diagram

Maretron, LLP

9014 N. 23rd Ave #10

Phoenix, AZ 85021-7850

Copyright © 2011 Maretron, LLP All Rights Reserved P/N: M001807 Rev.1.3 1/11