
5. SD1+ Connections
Before any connections are made to the SD1+ remove the power (battery and 240V
mains) from the control panel. Connections are provided as follows:
TRIG A: When triggered, the unit starts the dialling sequence and sends
message A.
TRIG B: When triggered, the unit starts the dialling sequence and sends
message B.
TRIG C: When triggered, the unit starts the dialling sequence and sends
message C.
ABORT / D: If the SD1+ is programmed as “ABORT by INPUT” this connection can
be used to abort the dialling sequence. If the SD1+ is not
programmed as “ABORT by INPUT” this connection can used as trigger
input D.
Trigger/Abort inputs can be selected to be either +ve applied to
trigger or -ve applied to trigger. Set the "Trigger Polarity" jumper-link to
the appropriate position.
TAMP: These two terminals can be connected to the main tamper zone on
the alarm control panel, to provide case tamper protection for the
SD1+.
0V: Connect to a permanent 0V supply on the control panel.
+12V: Connect to a permanent +12V supply on the control panel.
O/P1: A switched -ve @100mA programmable output.
Connections on the SD1+ are described as ether "Safety Extra-Low Voltage" circuits (SELV) or
"Telecommunication Network Voltages" circuits (TNV). Therefore it is important that installer
ensures that TNV circuits are only connected to the PSTN and SELV circuits are only
connected to other circuits designated as SELV circuits.
Please ensure that cabling to the telephone line connections (TNV) are routed well away
from the trigger input circuitry (SELV) and the cabling to the trigger input circuitry (SELV) are
routed well away from the telephone circuitry (TNV).
SD1+ SD1+
+12V +12V
TRIG POLARITY TRIG POLARITY
0V 0V
++
- -
TRIG A TRIG A
TRIG B TRIG B
TRIG C TRIG C
+12V on alarm
0V on alarm
1K
resistor
1K
resistor
N.C.
Loop
N.O.
Loop
N.O.
Loop
N.C.
Loop
TRIG A = Normally Closed Input
TRIG B = Normally Open Input
TRIG C = Switched +ve Input
TRIG A = Normally Open Input
TRIG B = Normally Closed Input
TRIG C = Switched -ve Input
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