9
DEVICE EXPLANATION
9
9.2 Internal User Devices
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9.2.10 Timer (T)
(g) When two timers are used
If two timers are used, the ON/OFF ladders should be created as shown in
Diagram 9.27.
T0
T1
T0
K10
T1
K10
T0
M0
Diagram 9.27 ON/OFF ladder using two timers
1 second measurement
following T0 ON
1 second measurement
when T1 OFF
ON/OFF repeated every
1 second