Item Specification
Safety input OFF voltage/OFF
current
5 VDC max./1 mA max.
Test output type Sourcing outputs (PNP)
Test output rated current 50 mA max.
Test output ON residual voltage 1.2 V max. (IOV and all output terminals)
Test output leakage current 0.1 mA max.
Dimensions (mm) 12 × 100 × 71 (W × H × D)
Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at 100 VDC)
Dielectric strength 510 VAC between isolated circuits for 1 minute at a leakage current of 5
mA max.
I/O power supply method Power supplied from the NX bus
Current capacity of I/O power
supply terminals
No applicable terminals.
NX Unit power consumption
• Connected to a CPU UNIT or a Communication Control Unit
1.10 W max.
• Connected to a Communications Coupler Unit
0.75 W max.
Current consumption from I/O
power supply
20 mA max.
Weight 70 g max.
Circuit layout
Internal Circuits
T0–1
Terminal block
Si0–7
I/O power supply +
I/O power supply -
I/O power supply +
I/O power supply -
NX bus
connector (left)
NX bus
connector
(right)
Terminal connection diagram Si0 to Si7: Safety input terminals
T0, T1: Test output terminals
Si0
Safety Input Unit
NX-SID800
Safety Switch
A1 B1
A8 B8
Si1
T0 T1
Si2 Si3
T0 T1
Si4 Si5
T0 T1
Si6 Si7
T0 T1
Refer to 4-3-1 Safety Input Function on page 4 - 10 for details.
2 Specifications
2 - 21
NX-series Safety Control Unit User's Manual (Z930)
2-2 Safety Input Unit
2
2-2-1 Models and Specifications
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