Product Specification Sheet APS483

Rev. 07/2013

LI404B Flashing Strobe for Hearing Impaired

Architects' And Engineers' Specifications

The strobe light unit(s) shall be Alpha Communications® / TekTone LI404B or approved equal. Operation shall be accomplished by placing a call to an apartment intercom (or video-intercom) station. The strobe shall flash for approximately 15-20 seconds after activation of the incoming call signal.

The strobe light shall have a brightness of 15 candela per UL® 1971 (75 candela per UL® 1638). It shall be encased in an attractive, flame retardant type ABS plastic housing.

The strobe light shall meet ADA and UL® requirements for signaling appliances. The strobe shall be powered by the appropriate 24VDC power source (PK601A or equivalent).

Contractor shall observe all local and national electrical and building codes.

  • Easy to install and operate
  • Low-power operation
  • Multiple applications
  • Precision engineering
  • Panel-mounted and remote inputs
LI404B Strobe Unit For Hearing-Impaired

The Alpha Communications® / TekTone LI404B strobe is a high-intensity remote visual signaling device for use with Alpha Communications® IA543, PK543, PK543A, PK205, or PK292A amplifier apartment systems, and optionally with the Alpha Communications® IA502 or PK502B transfer relay(s).

The unit is primarily for use in locations where hearing-impaired persons require supplemental call notification, but can be used anywhere that a visual indication of an incoming call is desired. The bright strobe light flashes once a second for approximately 15-20 seconds when an incoming call is detected.

The device can be installed in most standard single or double gang electrical boxes or similar indoor openings. It is not a weatherproof device and therefore should not be used for any outdoor applications. Installation is facilitated by use of simple connections to the pre-mounted circuitry and a complement of mounting hardware. The LI404B's strobe light portion meets ADA and UL® 1971 requirements.

Required Components
  • LI404B Strobe Unit
  • System Amplifier: may be used with IA543, PK543A, PK205, PK292A and related system components (IA502 / PK502B transfer relays, IS, IR & TA apt. stations, CM & AM & VI or similar entrance panels).
  • PK601A Power Supply (requires SS106 transformer for power). One (1) per system when used with apartment amplifier(s) shown above, or one (1) per unit when used as stand-alone strobe(s).
Dimensions: Height: 5.60" (143mm)
Width: 4.60" (117mm)
Depth: 3.50" (89mm)
Projects: 2.25" (58mm) from mounting surface
Construction: Attractive flame retardant type ABS plastic casing
Strobe: 15 cd per UL® 1971
Power: 24 VDC, 57 mA DC nom
Wiring: 18 ga. minimum, 750' maximum
Mounting: Steel City #H2BD box with Steel City #2GC plaster ring, or Alpha Communications® Model IH356 box with IH355 ring, or EXACT EQUAL.
Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.