Product Specification Sheet APS144

Rev. 07/2013

LI404A Flashing Strobe for Hearing Impaired

This Specsheet is for a product which is discontinued. Please contact us for alternative products.
LI404A Flashing Strobe
Block Wiring Diagram
LI404A Strobe Unit For Hearing-Impaired
The Alpha Communications® LI404A strobe is a high-intensity remote visual signaling device for use with Alpha Communications® IA543, PK543, PK205, and PK292A amplifier apartment systems and Alpha Communications® IA502 or PK502B transfer relays. 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 10-20 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 LI404A's strobe light portion meets ADA and UL 1971 requirements.

Height: 4.50" (114mm) Width: 4.50" (114mm) Depth: 2.33" (59mm)
Rugged ABS plastic casing
15 cd per UL 1971
24 VDC, 135 mA DC nom.
18 ga. minimum, 750' maximum
Steel City #H2BD box with Steel City #2GC plaster ring, or Alpha Communications® Model #IH356 box with IH355 ring, or EXACT EQUAL.
Required Components
  • LI404A Strobe Unit
  • System amplifier: may be used with IA543, PK543, PK205, PK292A and related system components (IA502 / PK502B transfer relays, IR & TA apt. stations, CM & AM & VI or similar entrance panels).
  • PK601A Power supply (requires SS106 trans former 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).
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.