1
Model PAD-5
Wiring and Configuring the PAD-5-MB
26
Siemens Industry, Inc.
A6V101030358_en--_c
Smart Infrastructure
X400
Pin
Designation
Description
1
NAC3_+
Positive feed for Contact Input Circuit 3
2
NAC3_-
Return feed for Contact Input Circuit 3
3
NAC4_+
Positive feed for Contact Input Circuit 4
4
NAC4_-
Return feed for Contact Input Circuit 4
Admissible cable cross-section: 1 x 12-18 AWG or 2 x 16-18 AWG
3.2.2.4
NAC Follower Input
The PAD-5-MB board has an input designed to connect to an external fire alarm
control unit's NAC circuit so that the PAD-5-MB board's NAC circuits can follow the
activation of the NAC circuits from an external source. The NAC Follower Input is
also used for synchronization for the PAD-5-MB and PAD-5-CLSA boards, so that
multiple PAD-
5’s can be synchronized together across multiple XDLC modules.
3.2.2.5
Wiring X600 NAC Follower Terminal Block
X600 Pins 3 and 4 are connected internally to Pins 1 and 2 respectively and are
used for ease of cascading input signal to other panels. So the pair of wires go in on
(1, 2) and leave on (3, 4). If the PAD-5-MB is the end, then the EOL goes on (3, 4).
If not, continue the run from (3, 4) to the next PAD-5-MB (1, 2).
