Marine DIN-Rail Switch Monitor Plus

Product Overview

The Marine DIN-Rail Switch Monitor Plus is designed to monitor the state of one or more single pole, volt free contacts connected on a single pair of cables and to report the status to Apollo compatible analogue control equipment.

The Marine DIN-Rail Switch Monitor Plus provides four input states to the control equipment: ‘normal’, ‘fault’, ‘pre-alarm’, and ‘alarm’. The unit has a red LED to indicate an alarm and a yellow LED to indicate a fault condition.


  • Loop powered.


  • MED
  • ABS


Voltage 17 – 28 V dc
Maximum Current Consumption at 24 V
Switch-On Surge, Max 65ms 2.5 mA
Quiescent 730 µA
Input Short-Circuit 3.5 mA
LED Off, Switch Input Closed 1.3 mA
LED On, Switch Input Closed 3.4 mA
LED On, Switch Input s/c 5.6 mA
Switch Input Monitored Voltage 9 – 11 V dc
Operating Temperature -20°C to +70°C
Relative Humidity 0 to 95% RH
IP Rating Designed to IP20
Size 110mm W x 107mm H x 20mm D
Weight 95 grams

Please Note: All data is supplied subject to change without notice. Specifications are typical at 24V, 23°C and 50% RH unless otherwise stated.

Item Numbers

55000-772MAR Marine Switch Montior Plus