Copyright © 2019 Nortek Security & Control LLC
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Connect the Hardwire Loops
The GC3 Panel supports up to two (2) wired zones. Typically, these zones are used for hardwired Door/Window contact
sensors. You
fi
rst install the contact sensors and then route the loop wiring to the GC3 Panel. This type of connection is
commonly referred to as hardwire loops.
IMPORTANT:
The GC3 Panel’s hardwire loops are designed to support contact sensors such as magnetic reed
switches or pressure pads. They are not designed for hardwire smoke detectors, carbon monoxide detectors,
motion detectors, or glass break detectors.
TIP:
If you are planning to upgrade the existing wired security system at the home or business to a wireless system
or if you have a need to retro
fi
t any pre-wired sensors in newer construction for wireless, you can purchase the
2GIG Hardwire Conversion Kit ( 2GIG-TAKE-KIT1) .
To install the hardwire loop wiring for the contact sensors:
1. Install the wired contact sensors.
2. Route the contact sensor’s loop wire(s) through the back of the GC3 Panel’s wiring cutout.
3. Use the diagram below as a guide for connecting the sensor’s loop wires to the GC3 Panel terminal block.
»
Normally Closed (N/C):
Used for Normally Closed (N/C) circuits. This means the circuit on the contact switch is
closed when the magnets are aligned on the door/window contact. When armed, the GC3 Panel activates an alarm
signal it detects that the door or window is no longer in the normally closed state.
»
Normally Open (N/O):
Used for Normally Open (N/O) circuits. This means the circuit on the contact switch is open
when the magnets are aligned on the door/window contact. When armed, the GC3 Panel activates an alarm signal
when it detects that the door or window is no longer in the normally open state.
»
End-of-Line Resistor (EOLR):
Used to supervise the sensor for open or short circuit conditions with an End- of-
Line Resistor (EOLR). If EOLR supervision is required, you must install a 2.2 k
Ω
resistor (not supplied). End of
Line Resistors must be installed at the location in the loop farthest away from the panel. This feature allow for the
use of an EOL resistor for existing zones.
NOTE:
For compliance with UL 38: Manual Signaling Boxes for Fire Alarm Systems, stranded conductors
clamped under wire binding screws or similar parts shall have the individual strands soldered together or shall be
equivalently arranged.
Wiring Diagram—Hardwire Loops
TIP:
After the installation is complete, you must program the wired zone into the GC3 Panel. During programming,
you must de
fi
ne the normal state of the circuit for each wired zone. See “Program a Wired Zone.”
