C.3 DC Output Modules
Unified Controller nv series type2 light Controller Unit Instruction Manual
119
D
COM
P2
＋
−
OUT
A
P24
P1
＋
−
IN
COM
DC
出力モジュール
外部機器
Figure C-11 Connection for internal power feeding
P1 and P2 should basically be common. If separate power supplies are used for
them as shown in the above figure, insert a backflow prevention diode in
Position A in the figure in order to prevent the backflow to P2.
Besides, it is useful to use an interlock that applies only P1 when P2 is normal.
<Note 2>
If the DC output module's power line to the P24 terminal was cut, the load
current of a signal with output OFF may sneak around the circuit with output
OFF may sneak around the circuit with output ON, as shown in Figure C-11, in
addition to the <Note1> above. If this occurs, the external load may go ON.
Figure C-12 Supply of 24 DCV
Pay sufficient attention to the P24 line so that it is not cut.
(5) For the lamp load or the like, a rush current flows at output ON time.
You need to pay attention so that the output transistor is not destroyed due to this
rush current.
To restrict the rush current, it is useful to take measure where the resistor is
connected in parallel to the load, or a dark current flowing through the lamp load
with the resistor installed between the output terminals.
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