Product Specification Sheet APS155

Rev. 07/2013

PK400 Control Unit/Power Supply (SM400 Series)

This Specsheet is for a product which is discontinued. Please contact us for alternative products.
Architects' And Engineers' Specifications
The power supply shall be Alpha Communications® / TekTone® Model PK400 or approved equal and shall provide 24VDC power to all powered components in the SM40X series system. The voltage output shall be regulated and shall be limited to no more then one (1) amp of current at any time. 

The circuitry shall be housed in an attractive, molded, durable, white ABS plastic enclosure. Connections shall be made using a wiring pigtail harness (supplied), which may be unplugged to allow for quick and easy amplifier replacement and testing.

Wire designations shall be indicated on the power supply housing. Contractor shall observe all local and national electrical and building codes.

PK400 Power Supply

The PK400 is a 24VDC power supply used to power the SM40X series intercom system. The unit provides a filtered 24VDC output rated at 1 amp. The unit produces this output from a 24VAC input, which is supplied from the SS106 transformer (or approved equal), as well as the circuitry required to provide tone, chime and L.E.D. functions. Connections to the unit are made via made 14-conductor pigtail which is supplied. The connector is color-coded, with wiring designations on the unit's case.

  • Easy Installation
  • Surface mountable
  • Low-voltage operation
  • Precision engineering
  • Quick and easy plug-in replacement

Height: 5.50" (140mm) Width: 3.75" (96mm) Depth: 1.19" (31mm)
Durable, high-impact, flame-retardant, fog white ABS plastic
Wiring pigtails with 14 conductors (supplied)
24VAC (supplied by SS106 transformer)
24VDC, 1 amp maximum

Typical System Components
  • SM40X Series Master Station(s)
  • IR/OR Series Remote Station(s)
  • PK400 Power Supply (1 required per system)
  • SS106 Transformer (1 required for each PK400)
  • RY400 3- Contact Door Opener Relay Adapter
  • RY401 All-Call System Adaptor
  • RY402 3-Remote in-use L.E.D. Adapter
Alpha Communications
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.