Omron CV500 Installation Guide

63
When an inductive load is connected to an I/O Unit, connect a surge suppressor
or diode in parallel with the load, as shown in the following diagram. The diode
will adsorb the back electromagnetic field generated by the load.
L
IN
COM
Diode DC
input
OUT
COM
Relay Output Unit
T riac Output Unit
OUT
COM
Relay Output Unit
T ransistor Output Unit
Diode
L
L
+
Surge suppressor
where for the surge suppressor ,
Resistor:
50 W
Capacitor:0.47F
Voltage:
200 V
and the diode,
Breakdown voltage: at least 3 times load voltage
Mean rectification current: 1 A
Input Units
Voltage Inputs Do not wire voltage inputs as shown on the left below.
+
0
V
Sensor
power
supply
V oltage output
Output
COM (–)
IN DC input
Incorrect
+
0 V
Sensor
power
supply
V
oltage output
Output
COM (+)
IN DC input
Correct
Input Leakage Current When two-wire sensors, such as photoelectric sensors, proximity sensors or
limit switches with indicators are connected to the PC as input devices, the input
bit may be turned ON erroneously by leakage current. In order to prevent this,
connect a bleeder resistor across the input to reduce the input impedance.
Sensor
Input
power
supply
Bleeder
resistor
R
PC
Inductive Load Surge
Suppressor
Wiring I/O Units Section 3-5

Omron CV500 Specifications

General

Brand	Omron
Model	CV500
Category	Controller
Language	English