Copyright © 2019 Nortek Security & Control LLC
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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
