Precautions for Correct Use
Safety devices with semiconductor outputs, such as safety light curtains, sometimes provide a
pulse output that is used to detect wiring errors. Observe the following when connecting a Safe-
ty Device with a semiconductor output to a safety input terminal.
• OFF pulse width when semiconductor output is ON: 700
μs max.
• ON pulse width when semiconductor output is OFF: 30 μs max.
Check the specifications of the connected device for the maximum cable length.
l
E3ZS/E3FS Single-beam Safety Sensors
An OMRON E3ZS/E3FS Single-beam Safety Sensor is connected as shown in the following figure.
Single-beam Safety Sensors
IOV
IOG
IOV
IOG
T0
Si0
24 VDC
0 V
Emitter
Receiver
Brown
Brown
Blue
Pink
Pink
Blue
Black
The unit that supplies the I/O
power to the NX bus
NX bus connection
NX-SIoooo
Example of Sysmac Studio Settings:
4 Safety Control Unit Operation
4 - 15
NX-series Safety Control Unit User's Manual (Z930)
4-3 Safety I/O Function
4
4-3-1 Safety Input Function
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