Maretron M003017 User Manual

Installation Instructions

10271 1-1/2" FPT Cooling Water Flow Switch

Introduction

The Maretron 10271 is an accessory for the SIM100 Switch Indicator Module. The 10271 has a set of normally
closed contacts that will open whenever a flow of cooling water of a user-settable amount is detected.

Instructions

Please follow these instructions to connect the 10271 to the NMEA 2000 network via a Maretron SIM100 Switch
Indicator Module. The wiring diagram appears in Figure 1. The diagram shows a connection to channel #1, but
connections to other channels are similar. Please refer to the original manufacturer’s instructions packaged with
the product for additional details including setting of the switch activation flow rate.

1. Install the two wires from the 10271 to a free switch channel on the SIM100. The two wires are
interchangeable. The example in Figure 1 shows the flow switch connected to switch channel 1, terminals
SW1A and SW1B.

2. Use a Maretron DSM250 display (firmware 1.3.5 or higher), or 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 appro priate channel to the
“No End of Line Resistor” setting. For this example, you would set “Channel #1 Mode” to “No End of Line
Resistor”.

3. Supply Power to the NMEA 2000 network, Verify that the switch channel indicates an “on” (normal) state
using Maretron N2KView software, N2KAnalyzer, or other product capable of displaying switch indicator
state.

4. Start cooling water flow through the 10271 and verify that the switch channel indicates an “off” state.

Flow
Switch

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

SW1A SW2B

SW1B SW2A SW3A SW3B SW4A SW4B SW5A SW5B

SW6A SW6B

Figure 1 - Wiring Diagram

SIM100 Screw Terminals

Copyright © 2011 Maretron, LLP All Rights Reserved P/N: M003017 Rev.1.1 7/11

Device Specifications

Parameter Value

Inside Diameter 1.5” (38.1mm)
Outside Diameter 2.22” (56.4mm)
Length 4.36” (110.7mm)
Height 3.08” (78.2mm)
Activation Flow Rate W/O Baffle 10-14 GPM (37.9-53.0 LPM)
Activation Flow Rate W/Baffle 6-8 GPM (22.7-30.3 LPM)
Contacts Normally Closed
Connections 1-1/2” FPT Female
Switching Rating 50W
Switching Voltage (Max) 300VAC / 300VDC
Maximum Switching 0.5A (0.3A inductive)
Heat Resistance, Continuous 210°F (99°C)
Maximum Pressure 120 PSI @ 72°F

8.3 bar @ 22°C
External Fasteners 18-8 Stainless Steel
Construction CPVC Schedule 80
Connection 5’ (1.5m) Marine Grade Tinned Wire Leads
Springs Hastelloy “C” Springs for Corrosion Resistance
Gasket EPDM

For installation support, please contact:

Maretron, LLP

9014 N. 23rd Ave #10

Phoenix, AZ 85021-7850

Telephone: [phone]

E-mail: [e-mail]

Web: http://www.maretron.com

Copyright © 2011 Maretron, LLP All Rights Reserved P/N: M003017 Rev.1.1 7/11