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SIM100
Switch Indicator Module
*SIM100 requires configuration if two or more DCR100s, RIM100s, or SIM100s exist on single network (Maretron DSM570, DSM410, USB100, or IPG100 needed to configure)
Maretron's Switch Indicator Module monitors switch closure devices including, but not limited to, safety equipment (e.g., heat, smoke, carbon monoxide, explosive vapor detectors), security systems (e.g., motion, vibration, glass break, door and port hole magnetic switches), and vessel monitoring equipment (e.g., valve closed/open, high water bilge). The SIM100 continually monitors these switch closure devices and broadcasts information over the NMEA 2000® network about the switch state so the crew can be alerted to potential conditions or problems that warrant further investigation.
Advanced features of the SIM100 include the ability to detect whether or not power has been disconnected from the monitored device or if the signal wires have been disconnected due to either corrosion, tampering, or for any other reason (if the monitored device is so equipped).
With the SIM100, you can rest assured that critical sensors are receiving power, signal wires are connected, and all the safety, security and vessel functions are under constant supervision. SIM100 output information is then displayed with networked NMEA 2000® equipment such as Maretron's DSM570 or DSM410 dedicated displays or with NMEA 2000® compatible software such as Maretron's N2KView®.
Best of all, the SIM100 is NMEA 2000® certified so you can view any and all switch indicator status anywhere on the vessel using a compatible NMEA 2000® display. The SIM100 is a key component of Maretron's N2KView® vessel monitoring and control system.
- Heat detectors
- Smoke detectors
- Carbon monoxide detectors
- Gas detectors
- Bilge water detectors
- Magnetic switches
- Glass break detectors
- Clogged fuel filter detection (Excessive vacuum)
- Door, hatch, and porthole magnetic switches
The following accessories are available for the SIM100:
![]() | High Temperature Smoke/Heat Detector Kit Manufacturer's Installation Instructions
This kit contains a smoke/heat detector, auxiliary relay, and sounder that are designed to work in high temperature marine environments, such as engine rooms. The components in this kit are rated from -25°C (-13°F) to +70°C (158°F). This system is designed to work with a 24V DC power supply. |
![]() | Photoelectric Smoke/Heat Detector Manufacturer's Documentation
This kit contains a smoke/heat detector, and an End Of Line (EOL) relay. This system is designed to work with a 10-35V DC power supply. |
![]() | Bilge High Water Detector Manufacturer's Documentation |
![]() | Carbon Monoxide (CO) Detector Manufacturer's Documentation |
![]() | Motion Detector Manufacturer's Documentation |
![]() | Vacuum Switch |
![]() | Magnetic Switch Rectangular (Indoor) |
![]() | Magnetic Switch Rectangular (Outdoor) |
![]() | Magnetic Switch Cylinder (Indoor/Outdoor) |
![]() | Magnetic Switch Recessed (Indoor/Outdoor) |
Discontinued Products
![]() | Smoke/Heat Detector Manufacturer's Installation Instructions To reduce the chance of false alarms, the smoke detectors should be located in an environment with an ambient temperature between 32° F (0°C) and 100°F (37°C) and humidity between 0 and 95% non-condensing. See the above manufacturer's installation instructions for full location guidelines. |
![]() | 1” FPT Cooling Water Flow Switch |
![]() | 1-1/2" FPT Cooling Water Flow Switch |
![]() | 2" FPT Cooling Water Flow Switch |
Note: Maretron monitoring sensors are updated using Maretron’s N2KAnalyzer application on a PC paired with an approved NMEA 2000® gateway.
1.2.2.2 (2016-07-07)
- TX 127501 when switch bank ID changed (Bug #1334)
1.2.1.1 (2015-09-10)
- fix bug which cause a wrong time reading when timer compare match occur and interrupt was disabled and insert folder name in include header
- Add start-up option to disable address claim (must be used with SIM BOOT 1.0.6 or above)
- Updated BOOT ver to 1.0.6 - Support Address Claim Disable
1.1.3.1 (2013-08-05)
- Correct gen load default issue (bug #2687)
1.1.2.5 (2013-07-16)
- Updated the supported NMEA 2000 database version to 2.000
- Added support for new hardware (HW 1.0 à HW 2.0)
- Support Switch Status Counter/Timer (bug# 2542)
- Correct SN erased when upgrade from older firmware issue (bug #2652)
1.1.1 (2009-02-23)
- Added support for labeling so that the device can easily be identified with a user-programmable string
- Support Maretron Label Protocol #2
- Support Maretron Channel Protocol #2
1.0.2 (2008-11-05)
- Support Maretron Label Protocol
- Support Maretron Channel Protocol
1.0.1 (2008-08-25)
- Initial public release














