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INM MTL SUM5 Rev 7
DRAFT - 09 June 2021 DRAFT - 09 June 2021
8 REMOTE PUSHBUTTON INPUTS
• Five optically coupled digital inputs are provided as standard for use with external N/O
momentary pushbuttons.
Pushbutton Functions
• PB1 = System Test.
• PB2 = Mute.
• PB3 = Acknowledge.
• PB4 = Manual Reset.
• PB5 = First Reset.
• PCom= supply Return*
The above functions can be changed in software if required .
CAUTION
The Pushbutton inputs are designed for bipolar operation at 24VDC as provided by
the VAUX terminals. This is separate from Field Contact Voltage (FCV) selected for the
alarm inputs. Customer 24VDC external supply can be used, but must be suitable
protected by a fuse of MCB
WARNING !
For hazardous voltage above 60Vdc (SELV) isolate the supply before
carrying out work
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