VAR8 and Variants - Product Description
Issue: 02 complete, approved
Page 44 of 54
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.
L Contacts 1 to 10 are not available when the VAR8 is fitted
with an EFI01 European Fire Interface Card. The EFI01
provides the VAR8 with analogue inputs and digital
outputs.
L EOL resistors may be fitted internally, which may be used
for voltage-reversal monitoring for sounder circuit type
interfaces.
C1+
C5+
C1-
C4+
C4-
C3+
C2+
C3-
C2-
C5-
C10+
C7-
C7+
C6-
C6+
C9+
C9-
C8+
C8-
C10-
VAR8
Signal Description
C'n'+
Opto-isolated input +VE connection
Cn'−
As above but –VE connection
Built-in resistor to suit voltages of +12 to +40 V
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.
L Contacts 11 to 20 are only provided on VAR8
Routers which are fitted with the EXP8 Interface
Expansion Board.
C20+
C17-
C17+
C16-
C16+
C19+
C19-
C18+
C18-
C20-
VAR8
C15+
C12-
C12+
C11-
C11+
C14+
C14-
C13+
C13-
C15-
Signal Description
C'n'+
Opto-isolated input +VE connection
Cn'−
As above but –VE connection.
Built-in resistor to suit voltages of +12 to +40 V
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