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Stratos-Micra • INSTALLER’S HANDBOOK • Iss. 1
6
6.2.2 Signal connections
RS485/SenseNET
terminals
APIC address
terminals
Wire from
‘Earth’ terminal
to earth stud
SenseNET/RS485
bus A wire
Power supply screen
wire to earth stud
SenseNET/RS485
bus B wire
SenseNET/RS485
bus screen wire
Power supply
0V wire
Power supply
+24V wire
To connect the signal wire, lead a suitable wire type (RS485 cable 9841, 120 ohm
screened twisted pair or equivalent) through the second cable gland and tighten it into
position with about 35mm of cable from the bottom of the cable gland.
Remove either the three-way terminal block next to the power supply socket if con-
necting the detector to a SenseNET system, or the four-way “Bus” terminal block if
connecting the detector to an alarm panel in conjunction with the APIC addressable
bus card
(see section 7.3).
For example, in a SenseNET system using screened cable,
connect the screen wire(s) to the “SCN” terminal, Bus A wire(s) to the “A” terminal
and Bus B wire(s) to the “B” terminal.
If the detector is in the middle of a SenseNET chain, with input and output connec-
tions, it may be more convenient to link the common Bus A, Bus B and screen wires
to single A, B and screen wires for linking to the terminal block.
The following illustration shows the power and signal connections to the docking sta-
tion for connection to a single SenseNET cable.