Omron NX-SL3300 User Manual page 146

4 Safety Control Unit Operation
Precautions for Correct Use
• Configure dual-channel inputs with safety input terminals on the same Unit. It is not always
possible to detect short circuits between safety input terminals on different Units.
• The total length of cable connected to one test output must be as follows:
NX-SIH400 and NX-SID800: 400 m max.
NX-SI
Additional Information
You can detect short-circuits between two input channels with the following methods:
• Dual-channel equivalent input: "With Test Pulse"
• Dual-channel complementary input: "Without Test Pulse" and "With Test Pulse"
l Devices with Semiconductor Outputs
The signal from a device with a semiconductor output, such as a light curtain, is input to a safety
input terminal (Si).
24 VDC
0 V
Example of Sysmac Studio Settings:
4 - 14
L
1
T0
L
2
L
3
Si0
L
4
Si1
L + L + L + L ≤ 400m
1 2 3 4
The unit that supplies the I/O power
to the NX bus
NX-SI
IOV IOV
IOG IOG
NX bus connection
Safety Light Curtain
Si0
Si1
NX-series Safety Control Unit User's Manual (Z930)