Delta DVP-20PM

2 Hardware Specifications and Wiring
DVP-20PM Application Manual
2-11
3. Relay output circuit

Direct-current power input

Emergency stop: An external switch is used.

Fuse: To protect the output circuit, a fuse having a breaking capacity in the range of 5 A to 10 A
is connected to a common terminal.

A diode is used to absorb the surge voltage which occurs when the load connected is OFF. It can
lengthen the lifespan of a terminal.
1.
A diode is connected to a load through which a direct current passes. It is used when the
power of the load connected is small.
+
D
R
Y
C0
D: 1N4001 diode
DC power
Low-power load
PLC relay output
2.
A diode and a zener diode are connected to a load through which a direct current passes.
They are used when the power of the load is large and the load is turned ON/OFF frequently.
D: 1N4001 diode
DC power
PLC relay output
ZDD
R
+
Y
C0
ZD: 9 V zener diode, 5 W
The power of the load is large and
the load is turned ON/OFF frequently.

Incandescent lamp: Resistive load

Alternating-current power input

Mutually exclusive output: Y4 controls the clockwise rotation of a motor, and Y5 controls the
counterclockwise rotation of a motor. The interlock circuit which is formed, and the program in
the DVP-20PM series motion controller ensure that there will be protective measures if an
abnormal condition occurs.

Indicator: Neon lamp