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  • Kidde | Intelligent Analog Detector Standard Mounting Base (B4U) for SLC Fire Alarm Loops | KI-SB
Intelligent Analog Detector Standard Mounting Base (B4U) for SLC Fire Alarm Loops
Kidde Commercial

Intelligent Analog Detector Standard Mounting Base (B4U) for SLC Fire Alarm Loops

SKU KD-KI-SB

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The Kidde KI-SB is the standard mounting base for the entire Kidde intelligent analog detector line. It connects detector heads to the SLC (Signaling Line Circuit) loop on Kidde intelligent fire alarm control panels, with screw-terminal wiring and twist-lock detector mounting that keeps swap-outs fast during service calls.

Built for the commercial fire installer

The B4U base mounts directly to 4" octagonal boxes, 4" square boxes, single-gang boxes, and 3.5" octagonal boxes - no adapters, no special hardware. Once wired to the SLC loop, any Kidde intelligent analog detector head twists on and enrolls through the panel. UL and ULC listed, with CSFM and MEA/NYC approvals for projects that require them.

Key features

  • Universal detector compatibility: supports all Kidde intelligent analog heads - photo/heat (V-PHS), photoelectric smoke (V-PS), rate-of-rise heat (V-HRD), and fixed-temperature heat (V-HFD)
  • Fits standard electrical boxes - 4" octagonal, 4" square, single-gang, and 3.5" octagonal
  • Screw-terminal wiring for clean, reliable SLC loop connections
  • Twist-lock mounting for fast detector head installation and swap-outs
  • UL, ULC, CSFM, and MEA/NYC listed for code compliance across jurisdictions

System requirements

Requires a Kidde intelligent fire alarm control panel with an SLC loop (FX-64, FX-1000, or FX-2000 series). The base is a passive mounting and wiring connection point - all detection intelligence lives in the detector head. For jobs that need relay output, loop isolation, or sounder functions at the base, see the RB4U, IB4U, and SB4U base variants.

Specifications

SKUKD-KI-SB
BrandKidde Commercial
Form factorStandard round detector mounting base, 6.1" (155mm) diameter x 1.6" (41mm) height
Mounting4" octagonal, 4" square, single-gang, or 3.5" octagonal electrical boxes
WiringScrew terminals for SLC (Signaling Line Circuit) loop
CommunicationSLC loop to Kidde intelligent FACP (FX-64, FX-1000, FX-2000 series)
Compatible detectorsV-PHS (Photo/Heat), V-PS (Photoelectric Smoke), V-HRD (Rate-of-Rise Heat), V-HFD (Fixed Temp Heat)
Operating temp32°F to 120°F (0°C to 49°C)
Operating humidity0-93% RH, non-condensing
ComplianceUL, ULC, CSFM, MEA/NYC
Ship weight0.11 lb (0.05 kg)

Documents and resources

FAQs

What detectors are compatible with the KI-SB base?
All Kidde intelligent analog detector heads: the V-PHS (photo/heat), V-PS (photoelectric smoke), V-HRD (rate-of-rise heat), and V-HFD (fixed-temperature heat). The detector twists onto the base and enrolls through the FACP.
Does this base fit standard electrical boxes?
Yes. The B4U mounts directly to 4" octagonal, 4" square, single-gang, and 3.5" octagonal electrical boxes without adapters.
What is the difference between the B4U and other Kidde bases?
The B4U (KI-SB) is the standard base - wiring and mounting only. Variants add functions: RB4U adds relay output, IB4U adds SLC loop isolation, SB4U adds a sounder, and SB4U-LF adds a low-frequency sounder for sleeping areas.
What fire alarm panels does this work with?
Kidde intelligent fire alarm control panels with SLC loops, including the FX-64, FX-1000, and FX-2000 series.
Can I swap detector heads without rewiring?
Yes. The detector head twists onto the base without disturbing the SLC wiring. Swap a photo detector for a heat detector on the same base in seconds.
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