George Risk Industries 6644T 2K Open 1K Close Resistor

Product Description

The George Risk Industries 6644T is a dual-value resistor used in supervised security contact circuits. It provides a 2,000-ohm (2K) resistance value in the open state and a 1,000-ohm (1K) resistance value in the closed state. This type of end-of-line or in-line resistor is a standard component in alarm panel wiring where supervisory resistance is required to distinguish between normal, alarm, and trouble conditions on a zone loop. Installation is typically performed by alarm technicians and low-voltage security contractors.

The 6644T is intended for use in supervised zone wiring on residential and commercial security and fire alarm systems. It is suited for applications where the control panel requires specific resistance values to monitor circuit integrity. The resistor integrates directly into the contact wiring loop and enables the panel to detect open, closed, and fault conditions as separate states. It is sold individually as a single unit.

Key Features

• 2K ohm resistance in the open state for zone supervision
• 1K ohm resistance in the closed state for panel state differentiation
• Supports three-state zone monitoring: open, closed, and fault
• Single-unit packaging suitable for individual circuit installations
• Compatible with supervised alarm panel zone inputs requiring dual-value resistor wiring

Compatibility

Designed as an OEM-style accessory for supervised security contact circuits requiring dual-value resistor configurations on alarm panel zone loops.

Installation Notes

This component is installed by licensed low-voltage or alarm technicians in accordance with NFPA 72 and local authority having jurisdiction requirements. De-energize the alarm panel zone before wiring the resistor into the loop. The resistor must be placed correctly in series or at the end of line per the panel manufacturer wiring diagram to ensure proper supervisory function. Do not substitute resistor values without verifying compatibility with the specific control panel zone requirements.