Digital Inputs (Control Contacts) - ASL INTERCOM VAR8-ACU Product Description

8.4

Digital Inputs (Control Contacts)

Contacts 1 to 10
•
2x10 way double stack terminal block (5 mm).
•
Opto-isolated interface with built-in resistor to suit voltages
of +12 to +40 V.
•
The contact is asserted when the opto-isolator is turned on.
It may be used to interface a simple closure, or as a
Sounder Circuit Interface suitable for connecting the Fire
Alarm to the Router for triggering DVA messages.
•
Can be configured for external fault, routing, or route reset.
•
Lower terminal block: Contacts 1 to 5.
•
Upper terminal block: Contacts 6 to 10.
EOL resistors may be fitted internally, which may be used
for voltage-reversal monitoring for sounder circuit type
interfaces.
Signal
C'n'+
Cn'−
Contacts 11 to 20
•
1x10 way double stack terminal block (5 mm).
•
Opto-isolated interface with built-in resistor to
suit voltages of +12 to +40 V.
•
The contact is asserted when the opto-isolator
is turned on. It may be used to interface a
simple closure, or as a Sounder Circuit Interface
suitable for connecting the Fire Alarm to the
Router for triggering DVA messages.
•
Can be configured for external fault, routing, or
route reset.
Contacts 11 to 20 are only provided on VAR8-
ACU Routers which are fitted with the EXP8
Interface Expansion Board.
Signal
C'n'+
Cn'−
VAR8-ACU and Variants - Product Description
Opto-isolated input +VE connection
As above but –VE connection
Built-in resistor to suit voltages of +12 to +40 V
Opto-isolated input +VE connection
As above but –VE connection.
Built-in resistor to suit voltages of +12 to +40 V
Issue: 02 complete, approved
Page 34 of 44
VAR8
Description
VAR8
Description