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  • Kidde | Analog Addressable Dual Input Module, UIO Mount, Class B Circuit | GSA-MCT2
Analog Addressable Dual Input Module, UIO Mount, Class B Circuit
Kidde Commercial

Analog Addressable Dual Input Module, UIO Mount, Class B Circuit

SKU KD-GSA-MCT2

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The GSA-MCT2 puts two monitored initiating device circuit (IDC) inputs on a single addressable module that plugs directly into a Kidde UIO base. It saves an electrical box and wiring run compared to a box-mounted module for every pair of IDC circuits on the job.

Built for the commercial fire alarm installer

Each input accepts normally open dry contact initiating devices and can be configured for alarm, supervisory, or monitor operation via the front-panel slide switch. Rotary switches set the device address - the module uses two consecutive SLC addresses, with the second assigned automatically. Ground fault detection at the module pinpoints wiring problems without walking the loop, cutting troubleshooting time on service calls.

Key features

  • Two IDC inputs on one addressable module - halves the module count on dual-zone doors, ducts, or pull station circuits
  • UIO mount plugs directly into the detector base - no separate electrical box or backplate needed
  • Rotary-addressed with ground fault detection at the module for fast troubleshooting
  • Configurable per-input operation - alarm, supervisory, or monitor via front slide switch
  • Class B circuit operation with 47 kΩ EOL supervision
  • Bicolor LED status indicator - flashing green (normal), flashing red (active)

System requirements

Requires a Kidde intelligent fire alarm control panel (FX Series or compatible) with an available SLC loop. The UIO mount requires a compatible Kidde detector base. Wire in accordance with NFPA 72 and CAN/ULC-S524.

Specifications

SKUKD-GSA-MCT2
BrandKidde Commercial
Form factorUIO plug-in module
CommunicationSLC (Signaling Line Circuit), analog addressable
Power inputPowered via SLC loop (no external power required)
Current drawStandby 550 μA, Activated 725 μA
Communication voltageMaximum 20 V peak-to-peak
Ground fault impedance10 kΩ
IDC inputs2 (normally open dry contact)
Circuit classClass B
AddressingRotary switches, 2 consecutive addresses per module
Device address range01 to 63 (64-point panel), 01 to 126 (1000-point panel)
EOL resistor47 kΩ (P/N: EOL-47)
Max circuit resistance50 Ω (25 Ω per wire)
Max circuit capacitance0.1 μF
Operating temp32°F to 120°F (0°C to 49°C)
Operating humidity0 to 93% RH, noncondensing at 90°F (32°C)
Storage temp-4°F to 140°F (-20°C to 60°C)
Wire size12, 14, 16, or 18 AWG (16 and 18 AWG preferred)
LED indicatorsBicolor - flashing green (normal), flashing red (active)
ComplianceUL listed
CompatibilityKidde intelligent fire alarm control panels (FX Series and compatible)

Documents and resources

FAQs

How many IDC circuits does the GSA-MCT2 monitor?
Two normally open, alarm, supervisory, or monitor type dry contact initiating device circuits (IDCs). Each module uses two consecutive addresses on the SLC loop.
What panels is the GSA-MCT2 compatible with?
Kidde intelligent fire alarm control panels including the FX Series. The module communicates via the SLC loop using analog addressable protocol with rotary addressing.
Does the GSA-MCT2 require an electrical box?
No. The UIO mount plugs directly into a compatible Kidde detector base, eliminating the need for a separate electrical box or backplate.
How do I set the device address?
Set the two rotary switches on the front with a screwdriver. TENS switch ranges 0-12, ONES switch ranges 0-9. The second address is automatically assigned one number higher.
Can the GSA-MCT2 detect ground faults?
Yes. Kidde intelligent modules include ground fault detection that pinpoints wiring issues to the individual module, saving hours of troubleshooting compared to conventional systems.
What EOL resistor does this module require?
47 kΩ end-of-line resistor, Kidde P/N: EOL-47. Required on each IDC circuit for Class B operation.
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