Specifications

Page 22
FIREFINDER SERIES II INSTALLATION, COMMISSIONING &
OPERATION
4.15 Addressable Loop Termination Board
The Addressable Loop Termination Board acts as the interface between the external addressable
devices and the control and monitoring functions of the FireFinder™. Each board provides
terminations for two loops. One slave CPU is required per loop. The 2 Addressable loops are
connected to TB1 and TB2.
 Note: AMPAC devices L2 is +ve (positive), L1 is -ve (negative)
Connect the XP-95 / DISCOVERY loop to the panel as shown below.
AMPAC strongly recommend that the LoopManager test set is used to check that the AMPAC loop
has been correctly installed and commissioned before connecting it to the FireFinder™.
Loop Parameters
 126 AMPAC Devices
 250mA Current Max
 S/C protection circuitry activates at approximately 300mA
 Note: Short Circuit Isolation should be provided on the analogue loop in appropriate places so
that a short circuit on the loop does not prevent more than 32 fire detectors from indicating an alarm.
CONNECTIONS
CN1 / 3
To Slave CPU
CN2 / 4
27VDC in / out
TB1 / 2
To Addressable loop devices
A
B
A
B
CN2
TB1
RV1
CN4
F1
26V ADJ
POWER
3A
REGULATED
27VDC In / Out
T0 SLAVE CPU
T0 SLAVE CPU
LOOP 1 ADDRESSABLE DEVICES
LOOP 2 ADDRESSABLE
DEVICES
LOOP NORMAL
LED A monitoring
each Loop is ON
LED A & B ON
indicates a fault
on the Loop
( S/C, O/C ) and
the Loop is being
monitored in
both directions
LOOP IN FAULT
F1: 3AMP M205 27V INTO
DC TO DC CONVERTOR
A
B
B
A
C
N
1
C
N
3
-
+
-
+
TB2
R+
L1
L2
-R
L1
L2
-R
L1
L2
-R
R+
R+
Wiring Shown
Above is for a
XP95 Circuit
with one Detector
Having LED
Monitoring
L2+ L1-
L2+ L1-
L2+ L1-
L2+ L1-
L1
L1
L1
L2
L2
L2
IN
OUT
IN
OUT
Figure 21: Addressable Loop Termination Board