Mounting Instructions

Connect external components
Fire brigade call station (AT) PT2002-A1
7
138 | 173
A6V10430579_en--_b
7.4.3 Connect DC 24 V power supply
The DC 24 V power supply connection is used to supply the PT2002-A1 with
power. Connect the 24 V to the 'AB-CN1' on the adapter board.
DC 24 V power connector - 'AB-CN1'
Pin
Description
Remark
1
DC 24 V
-
2
DC 0 V
-
Table 108: DC 24 V power connector - 'AB-CN1' on PT2002-A1 adapter board
The DC 0 V is galvanically isolated from the GND reference voltage , analog audio
and all digital interfaces. The galvanic isolation prevents earth loops and earth
bypass.
The 24 V can be supplied from a cabinet or an external power supply 'Merawex
ZSP135 DR-7A-3 40 Ah' PP2004-A1 with a separate cable.
Internal power supply DC 24 V of the mother board
The DC 24 V power supply connection 'AB-CN2' is used to supply the mother
board with power. This connection is pre-installed and with the mother board CN2
connected.
DC 24 V power connector - 'AB-CN2'
Pin
Description
Remark
1
DC 0 V
Connected to pin 1 of the mother board
2
DC 24 V
Connected to pin 2 of the mother board
Table 109: DC 24 V power connector - 'AB-CN2' on PT2002-A1 adapter board