Copyright © 2019 Nortek Security & Control LLC28Terminal Blocks Wiring DiagramThe GC3 Panel includes an 8-position terminal block and a 6-position terminal block. The table below describes eachposition on the terminal blocks.Terminal Block Positions* Terminal Block PositionsPosition Label OutputVoltageMaximum Length(meters)1 CLASS 2 14 VDC Power Input (+). Only providespower when the GC3Panel’s power supply isconnected 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 17 CLASS 2 Hardwire Loop Zone 28 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 112 CLASS 2 Open Collector Output 213 CLASS 2 (+) Image Sensor14 CLASS 2 Not supported
