Salcom 12-32-0000, Product Manual, Page: 8 / 16

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12-32-0000 32 PORT INPUT EXPANSION MODULE Product Manual
Sea Air and land Communications Ltd, 10 Vanadium Place, Addington, Christchurch 8024, New Zealand April 2017
Sending an Input Module Message
There are three ways of initiating a message sent from the input module:
•
Using the external discrete inputs
•
Supply detector threshold (Low supply message)
•
Watchdog
External Discrete Inputs
An action can be initiated from the 32 external inputs with an input transition to LOW
(connection to GND) and/or HIGH (input floating or connection to >+3.5v).
Low supply message
After a debounce period, the low-supply detector can initiate an action for both “supply going
high” and “supply going low” conditions.
Watchdog
The watchdog feature will initiate an action after a predetermined period. The watchdog also
optionally allows the transmission of the current state of selected inputs (including supply level).