Switch Monitor

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SHIELD Switch Monitor Module is designed to monitor the state of one or more single-pole, voltage-free contacts connected and to report the status to SHIELD infiNET panel.

  • Three input states - ’normal’, ‘trouble’, and ’alarm’
  • Loop-powered with visible status LED

Operating voltage 17–28V DC (polarity sensitive)
Maximum current consumption at
24V DC
switch-on surge, max 150ms 3.5mA
quiescent, 20kΩ EOL fitted 1.25mA
LED off, switch input closed 1.5mA
LED on, switch input closed 3.5mA
LED on, switch input s/c 3.6mA
Maximum continuous current 1A
Maximum switching current 3A
On resistance 0.2Ω
Switch input monitoring voltage 9–11V DC
Maximum cable resistance 50Ω
Operating temperature –20°C to +70°C
Humidity 0–95%
IP rating 54
Dimensions (L x B x H) 150 mm x 90 mm x 48 mm

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