Advanced Manual

Copyright © 2019 Nortek Security & Control LLC
28
Terminal Blocks Wiring Diagram
The GC3 Panel includes an 8-position terminal block and a 6-position terminal block. The table below describes each
position on the terminal blocks.
Terminal Block Positions* Terminal Block Positions
Position Label
Output
Voltage
Maximum Length
(meters)
1 CLASS 2 14 VDC Power Input (+). Only provides
power when the GC3Panel’s power supply is
connected to an AC power source.
2 CLASS 2 14 VDC Power Input (-)
3 CLASS 2 Ground (Low Side Hardwire Zone)
4 CLASS 2 Bell +
5 CLASS 2 Bell -
6 CLASS 2 Hardwire Loop Zone 1
7 CLASS 2 Hardwire Loop Zone 2
8 CLASS 2 Ground (Lowside Hardwire Zone)
9* CLASS 2 Transmit (RS232 TX) (Image Sensor)
10* CLASS 2 Receive (RS232 RX) (Image Sensor)
11 CLASS 2 Open Collector Output 1
12 CLASS 2 Open Collector Output 2
13 CLASS 2 (+) Image Sensor
14 CLASS 2 Not supported