3 Part Names and Functions
3 - 18
NX-series Safety Control Unit User’s Manual (Z930)
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
Safety 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.
E3ZS/E3FS Single-beam Safety Sensors
An OMRON E3ZS/E3FS Single-beam Safety Sensor is connected as shown in the following figure.
Example of Sysmac Studio Settings
700 µs max.
30 µs max.
Single-beam Safety Sensors
IOV
IOG
IOV
IOG
T0
Si0
24 VDC
0 V
Emitter
Receiver
Brown
Brown
Blue
Pink
Pink
Blue
Black
Communications Coupler Unit or
Additional I/O Power Supply Unit
NX bus connection
NX-SI
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