Intelligent Rotary-Addressable Form C Contact Relay Module for FX Series FACP
Kidde Commercial

Intelligent Rotary-Addressable Form C Contact Relay Module for FX Series FACP

SKU KD-FX-RLY

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The Kidde FX-RLY provides a programmable relay output on the SLC loop, giving installers direct control of external appliances, HVAC shutdown, or notification circuits without dedicated control wiring back to the panel. Rotary address switches and low standby current (125 A) keep commissioning fast and loop loading minimal.

Built for the commercial fire installer

UL and ULC listed. The FX-RLY connects to any Kidde FX Series Intelligent FACP via the Signaling Line Circuit and occupies a single address. The Form C dry relay contact handles pilot-duty loads up to 30 VDC at 2A or 125 VAC at 0.5A (60 W / 62.5 VA max), covering most ancillary control scenarios on a commercial fire job. It mounts in standard 4-inch square electrical boxes installers already have on the wall.

Key capabilities

  • Form C dry relay contact rated 30 VDC @ 2A or 125 VAC @ 0.5A for external appliance control or equipment shutdown
  • Dual-function operation: configurable as a control relay or polarity reversal relay through front panel programming or the configuration utility
  • Rotary address switches for fast SLC commissioning - supports 01-64 on 64-point panels, 01-127 on 1000-point panels
  • Low SLC loop loading: 125 A standby and activated current
  • Standard mounting: fits 4-inch square boxes (1-1/2" or 2-1/2" deep, 1-gang or 2-gang)
  • UL and ULC listed for code-compliant commercial fire installations

System requirements

Requires a Kidde FX Series Intelligent Fire Alarm Control Panel. Connects to the panel's SLC loop using 16 or 18 AWG field wiring (preferred). One address per module.

Specifications

SKUKD-FX-RLY
BrandKidde Commercial
Form factorIntelligent SLC relay module
CommunicationSLC (Signaling Line Circuit) to Kidde FX Series FACP
Power inputSLC loop powered
Relay typeForm C dry contact, programmable (control relay or polarity reversal)
Contact rating30 VDC @ 2A; 125 VAC @ 0.5A resistive; 60 W / 62.5 VA max
SLC current (standby)125 µA
SLC current (activated)125 µA
SLC voltage20 V peak-to-peak maximum
Ground fault impedance10 kΩ
Module addressingRotary switches, 01-64 (64-point panel) or 01-127 (1000-point panel)
Wire size12, 14, 16, or 18 AWG (16 and 18 AWG preferred)
Compatible electrical boxes4" square × 2-1/2" deep (1-gang or 2-gang); standard 4" square × 1-1/2" deep
Operating temp32 to 120°F (0 to 49°C)
Operating humidity0 to 93% RH, noncondensing at 90°F (32°C)
Storage temp-4 to 140°F (-20 to 60°C)
ComplianceUL listed, ULC listed

Documents and resources

FAQs

What FACP panels is the FX-RLY compatible with?
The FX-RLY works with Kidde FX Series Intelligent Fire Alarm Control Panels. It connects to the panel's SLC loop and requires one address per module.
What can the relay control?
The Form C dry relay contact can control external appliances, trigger notification devices, or shut down equipment like HVAC. Rated for 30 VDC at 2A or 125 VAC at 0.5A resistive loads (60 W / 62.5 VA max).
Can the FX-RLY provide polarity reversal?
Yes. The module can be configured as either a control relay or a polarity reversal relay through front panel programming or the Kidde configuration utility.
How is the module addressed on the SLC loop?
Rotary address switches on the module. Address range is 01-64 on 64-point FX panels or 01-127 on 1000-point FX panels. One address required per module.
What electrical boxes does the FX-RLY fit?
Standard 4-inch square electrical boxes: 2-1/2" deep (1-gang or 2-gang) and 1-1/2" deep. No special mounting hardware required.
All FX Series