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  • Kidde | Smoke Power Module.1 Required Per System When Using Siga-Um'S Gsa-Um'S Or Mab'S For Connecting To 2 Wire Conventional Detectors | SMK
Smoke Power Module.1 Required Per System When Using Siga-Um'S Gsa-Um'S Or Mab'S For Connecting To 2 Wire Conventional Detectors
Kidde Commercial

Smoke Power Module.1 Required Per System When Using Siga-Um'S Gsa-Um'S Or Mab'S For Connecting To 2 Wire Conventional Detectors

SKU KD-SMK

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The SMK Smoke Power Converter Module gives a two-wire conventional smoke circuit its own backup power source when it's tied into a Signature addressable data circuit, so a brownout on the main power supply doesn't take the smoke detectors down with it.

Built for the commercial installer

One SMK is required per system when using Signature UM/GSA-UM or MAB-family modules to connect 2-wire conventional detectors. The module continuously monitors the incoming supply and steps in with regulated operating voltage the moment it senses degraded power, so the conventional smoke loop stays alive through a supply fault. A two-LED status display (green normal, red alarm/active) gives a quick field check without opening a panel.

Key features

  • Backup power source for 2-wire smoke circuits on a Signature data circuit
  • Automatic power-degradation sensing — steps in only when needed
  • Two-LED status: green normal, red alarm/active
  • Fully supervised, power-limited wiring per NFPA 72 / CAN/ULC-S524

System requirements

Required when connecting 2-wire conventional smoke detectors through a Signature UM/GSA-UM or MAB-family universal module. Requires a compatible Signature addressable data circuit.

Specifications

SKUKD-SMK
BrandKidde Commercial
Form factorSmoke power converter module
Input voltage21.9 to 28.3 VDC (not resettable)
Output voltage24 VDC nominal at 200 mA max
Ground fault impedance10k ohm
Compatible electrical boxesNorth American 4" square x 2-1/2" deep 2-gang box; 4" square x 1-1/2" deep box
Wire size14, 16, or 18 AWG (0.75 to 1.5 sq. mm)
Operating temp32°F to 120°F (0°C to 49°C)
Operating humidity0 to 93% RH, noncondensing
ComplianceNFPA 72, CAN/ULC-S524

Documents and resources

FAQs

When is the SMK required?
One SMK is required per system whenever a Signature UM/GSA-UM or MAB-family module connects 2-wire conventional smoke detectors, to back up their operating power.
Does the SMK need its own address?
No. It is a power-backup module for the 2-wire detector circuit, not an addressable device -- it works alongside the addressable UM/MAB module that carries the circuit's address.
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