The loops consist of a positive and common and are able to source up to 500mA
of current. The loops;
Operate in single ended and redundant configurations
Are monitored for over current and short circuit in single ended mode
Monitored for over current, short circuit and open circuit in the redundant mode.
Note: A loop test function is available via the FACP user interface.
3.1.4 FACP Main Termination Board Inputs & Outputs
1 to 4 Supervised Inputs:
TB1 6-9.-Programmable digital inputs compatible with voltage free type outputs supervised
for open, short and earth faults. EOL is 10k. I/P4’s configuration can be changed to FARE if
required.
Inputs default configurations are:
IP1 Class change
IP2 Evacuate
IP3 Fault
IP4 Reset
1 to 4 Supervised Sounder Outputs:
TB3 - Programmable Supervised switched 24VDC output sourcing up to 750mA and
supervised for short, open and earth faults. O/P’s are also supervised for overload when
they are ON. EOL is 10K
Output default configurations are:
Sounder Outputs 1-4.
1 to 2 Open Collector Outputs:
Ancillary Output1 TB6/2 – low current (limited to 30mA), activated when there is a fire
condition present on the FACP.
Ancillary Output2 TB6/3– low current (limited to 30mA); activated when there is an ancillary
condition present on the FACP.
1 to 3 Relay Outputs:
TB4 – Programmable Voltage free relay contacts. Consists of NC, C and NO contacts.
Relay default configurations are:
Fire
Alarm
Fault
1 to 2 Auxiliary 24VDC Outputs:
TB1 3 and 4 & TB5- Programmable, supervised for over current, switched 24VDC output
sourcing up to 1A. Set to continuous as default