ENGINEERING DATA SHEET EQUIPMENT MODULAR SWITCHING UNIT RELAY RACK Application: Rail Transit Systems Function: Controls on-board switching functions. Characteristics: Includes hermetically-sealed, high shock and high vibration relays. Up to nine relay cassettes offering different switching configurations. Standard switching configurations available including double-throw contacts, double-break contacts or a mixture of the two front panel LED indicators. Standard 19-inch, 6-unit or 3-unit rack configuration Features: Polarizing keys to ensure correct cassette insertion. Relay contacts tracked out with two connector pins to allow wiring of relays from one cassette to those situated elsewhere on the train. Optional front-mounted test connector for onsite diagnostic testing.

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