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Partly Order Discontinued as of August 31, 2012
PM5S-A/S/M
Terminal connections
? Refer to the terminal layout and wiring
diagram and securely connect the
terminals accordingly.
? Do not allow control output to exceed
rated control capacity.
2. External surge protection may be
required if the following values are
exceeded. Otherwise, the internal circuit
will be damaged.
3. For connecting and disconnecting
operating voltage to the timer, a circuit
should be used to prevent the flow of
leakage current. For example, a circuit
for contact protection as shown in Fig. C
1. When one input signal is simultane-
ously applied to more than one timer, be
sure to avoid the wiring shown in Fig. A.
Operating voltage
Surge voltage
24 to 240 V AC
4,000 V
will permit leakage current to flow
through R and C, causing erroneous
operation of the timer. Instead, the circuit
Otherwise, the short-circuit current will
flow and cause damage. Be sure to align
Surge wave form [±(1.2 × 50)μs single
polarity full wave voltage]
shown in Fig. D should be used.
the polarity of the power supply as
100
No good
Good
shown in Fig. B.
Contact or transistor for
external input signal
90
50
Crest value
Power
supply
Leak current
R C
T
Power
supply
R
C
T
A1
30
Incorrect
B1
PM5S
Power
supply
0
0
1.2
50
(Fig. C)
(Fig. D)
A2
Time ( μ s)
4. In order to maintain the characteristics
Short-circuit
current
B1
A1
PM5S
of the timer, long continuous current flow
through the timer, causing generation of
heat internally should be avoided
because of the degradation it can cause.
A2
Fig. A
For such long continuous operation, the
circuit shown below should be used.
Contact or transistor for
external input signal
A1
Correct
B1
PM5S
A2
Power
supply
R: contacts of
R
relay k
R T
R Relay
R
T Time
Short-circuit
current
B1
A1
PM5S
A2
Fig. B
The PM5S series is provided with a
transformer less power supply system.
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