• KEYTECHNOLOGIES
• STSDEFENCE
• PRIMETAKE
• STSMOTORS
• STSRAIL
• STSSWITCHGEAR

• Signalling Relays
  • Relay Listing
  • Overview
  • Special Designs
• PO3000 Relays
• Telecoms
  • Concentrators
    • Concept 32
    • Concept 16
    • MACE
    • System Cards
      • PSU Services
      • BABT TIF
      • CB Line Card
      • LB Line Card
      • BABT Auto
      • PETS Line Card
  • MMI Products
    • Keyboards
      • Standard Series
      • 1306 Series
      • Monitor Series
      • Protowire 528 Replacement
      • Serial I/O Card
    • Custom Keypanels
      • Backbox Design
      • Serial Interface Unit
      • Keyboard Interface Driver
      • Repeat Keyboard Facility
    • PETS
      • PETS - How it works
      • PETS Line Card
      • PETS Wedge
    • LED Lamps
    • Telephone Handsets
    • Custom Blank Panels
  • Networking Products
    • DTMF Network Controllers PNC/CNC
    • WINDIAGS Software
    • Maintenance Terminal
  • Other Products
    • Compact UPS
    • Multiplexer
    • Speech Buffer
    • Polarity Checker 50V
    • Line Switch Unit
  • Services
    • Training
    • Services & Spares
    • Manuals
  • Certification
    • EMC
  • News Releases
    • Wembley Park
    • Westbury
    • Colchester
    • Alrewas Fire
  • Catalogue
  • Editorials
    • Innovating Solutions
  • Location
• TPWS/AWS
  • NEW - Alarm and LED Indicator Unit
  • Alarm & Indicator Units
    • Standard Alarm & Indicator Unit
    • AWS Alarm and Indicator Unit (retrofit model)
  • Complete Trainborne Systems
  • TPWS Control Unit
  • TPWS Antenna
  • AWS Receivers
  • AWS Reset Switch
• Other
  • DSD footpedals
  • Circuit Controllers
  • Test Equipment
  • Key Tokens Instruments
  • AWS Magnet Strength & Polarity Meters
• Downloads
• Quality
• Contact
• Location

AWS LED Indicator

STS/228-1
AWS LED Indicator

Manufacturing Ref. TY228
The AWS LED Indicator forms part of the STS Signals AWS System used within our Train Protection and Warning System and complies with the requirements of Network Rail Group Standard GE/RT8035.

The display consists of eight segments in the traditional “sunflower” arrangement. They are connected as 4 pairs so that should a diode fail only 25% of the display is lost. A 12.5V proving circuit is available. This is present as long as the supply is connected to the Indicator and either the Black/Yellow or Black displays are drawing current.

A reset output of 40V d.c. is provided conditional on a 12.5V supply being connected to the display and that a reset instruction being received from the driver’s desk.

Termination to the display is via a 19 pin multi-pole bayonet connector

The indicator has been in use on Class 373 and class 92 vehicle since 1993.

Supply 12.5V ± 1V d.c
Reset input 32-72V d.c.