Omron ZEN User Manual

48
Wiring Section 2-2
Connecting Input Devices to the CPU Unit
The following table shows how to connect various input devices.
Note Do not use the following wiring with voltage-output devices:
■ Leakage Current from Input Devices
A leakage current can cause false inputs when using 2-wire DC
sensors (proximity switches or photoelectric switches) or limit
switches with LEDs. False inputs won’t occur if the leakage current is
Device Circuit diagram
Relay output
NPN open collector
NPN current output
PNP current output
Voltage output
IN
COM
ZEN
+
−
Output
+
0 V
IN
COM
ZEN
+
−
Use the same power supply for the input and sensor.
Constant
current
circuit
Output
+
0 V
IN
COM
ZEN
+
−
IN
COM
ZEN
+
−
Output
+
0 V
IN
COM
ZEN
+
−
Output
+
0 V
Sensor
power supply
IN
COM (+)
ZEN
+
−
Output
+
0 V
Z211-E1-03.book Page 48 Friday, November 21, 2008 10:38 AM

Omron ZEN Specifications

General

Display	LCD
Mounting Type	DIN Rail
Operating Temperature	-10 to 55°C
Power Supply Voltage	100-240V AC
Output Type	Relay, Transistor
Number of Outputs	4-8
Programming Language	Ladder Logic