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TYPE 17—Standard Electric Time AR-3 Three-Wire Impulse
Each minute from 58 seconds to 00 seconds, a pulse is transmitted on line. The secondary
clocks receive the pulses on line A until the 58th minute. At this time, from 50 seconds to
00 seconds, a pulse on line B is required to advance to the 59th minute.
24A715/24A715M Master Clock Installation Manual
B-23
12345678
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
10 ASB MAX.
24Vdc PULSE
48Vdc PULSE
CORRECTION
CLOCK
COMMON WHT
2
= 1N4004 diode or equal
24Vdc
2
2
48Vdc
DC COMMON
TO CLOCKS
Figure B-20
Standard Electric Time AR-3 Three-Wire Impulse