Type B Vital Relays - Alstom

Installation
Table 3–5. AC Microchron II Timer Relay Installation Procedure (Cont.)
Step
Procedure
5 Attach the mating registration plate (packed with the AC Microchron II Timer
Relay) to the plugboard and plug in the relay.
6 Detach the cover that seals access to the thumbwheel switches by removing the
tamper evident lead seal, two thumbnuts, and sliding the clear plastic cover off
the studs.
COVER
1 2 3 4
5
THUMBWHEEL SWITCHES
7 Adjust the thumbwheel switches to the desired timing interval.
NOTE
Certain switches contain “stops” and only rotate between
allowable settings. For example, the “Tens of Minutes” switch can
only rotate between the “0” and “1” positions and the “Tens of
Seconds” switch can only rotate between the “0” and “5” positions.
P1457, Rev. Nov/07 3–14 Alstom Signaling Inc.