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TYPE 03—Standard Electric Synchronous
During normal operation, 120Vac is applied to the run motor. A 15-minute correction
signal on the correction motor line causes a 12-hour correction from 5:12:00 to 5:28:00.
This occurs twice daily (AM and PM). Run motor power is connected during the 12-hour
correction. A 29-second signal is applied to the correction motor line from HH:59:30 to
HH:59:59 to cause hourly corrections. During hourly corrections, power is disconnected
from the run motor line.
B-6
24A715/24A715M Master Clock Installation Manual
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CLK1 OR CLK2
x
x
x
x
RELAY
K6 (K8)
RELAY
K5 (K7)
II
MASTER CLOCK
FIELD CONNECTIONS
X = Normally open contact
I = Normally closed contact
AC RTN
10 ASB MAX.
120Vac
CORRECTION MOTOR
RUN MOTOR
1
= V250LA4 MOV or equal
1
1
RETURN
Figure B-4
Standard Electric Synchronous