Technical Note — Switched Input to Monitor Equipment State

Peter Edmonds

Created: ; updated: .

The C3 Inputs can be used to sense conditions where equipment should be on / off, or to generate alarms to be sent via email / SMS. Typically, these triggers are based on a stateful input.

Electrical connection

Simple voltage free contacts from pressure or flow switches can be wired into a C3 input.

Pressure switch electrical connection:

Flow switch electrical connection:

 

High Voltage Isolation Relay

Relays can be used to isolate higher voltages from C3 inputs, or example when detecting the absence of mains power

 

 

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