NX-SI / SO – NX Series Safety Input Unit – Omron Safety I/O Unit

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Safety I/O Unit

Safety Input Units

Unit
type
Ap-
pear-
ance
Specification Unit
version
Model
Number
of
safety
input
points
Number
of
test
output
points
Internal
I/O
common
Rated
input
voltage
OMRON
special
safety
input
devices
*1
Number
of
safety
slave
con-
nections
I/O re-
freshing
method
Safety
Input
Units
3244_lu_1_1 4 points 2 points Sinking
inputs
(PNP)
24 VDC Can be
connected.
1 Free-Run
refreshing
Ver. 1.1 NX-SIH400
3244_lu_1_2 8 points 2 points Sinking
inputs
(PNP)
24 VDC Cannot be
connected.
1 Free-Run
refreshing
Ver. 1.0 NX-SID800

 

 

Regulations and Standards

Safety I/O Units NX-SI/SO

Certification body Standards
TÜV Rheinland *1 • EN ISO 13849-1
• EN ISO 13849-2
• IEC 61508 parts 1-7
• IEC/EN 62061
• IEC/EN 61131-2
• IEC 61326-3-1
UL • NRAG (UL 508 and ANSI/ISA 12.12.01)
• NRAG7 (CSA C22.2 No. 142 and CSA C22.2 No. 213)
Shipbuilding Standards NK, LK

 

*1 Using the NX-series Safety I/O Units in conjunction with the NX-series Safety CPU Unit allows you to build a safety control
system that meets the following standards:
• Requirements for SIL 3 in IEC 61508 and IEC/EN 62061
• Requirements for PLe and Safety Category 4 in EN ISO 13849-1
The NX-series Safety I/O Units are also registered for RCM, EAC, and KC compliance.

 

General Specifications

Item Specification
Enclosure Mounted in a panel (open)
Grounding method Ground to 100 Ω or less.
Operating
environment
Ambient operating temperature 0 to 55°C (The upper limit of the ambient operating temperature
is restricted by the installation orientation.)
Ambient operating humidity 10% to 95% (with no condensation or icing)
Atmosphere Must be free from corrosive gases.
Ambient storage temperature -25 to 70°C (with no condensation or icing)
Altitude 2,000 m max.
Pollution degree 2 or less.
Noise immunity Conforms to IEC 61131-2.
2 kV on power supply line (Conforms to IEC 61000-4-4.)
Insulation class Class III (SELV)
Overvoltage category II
EMC immunity level Zone B
Vibration resistance Conforms to IEC 60068-2-6.
5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz, acceleration of
9.8 m/s2, 100 minutes each in X, Y, and Z directions (10 sweeps
of 10 min each = 100 min total)
Shock resistance Conforms to IEC 60068-2-27.
147 m/s2, 3 times each in X, Y, and Z directions
Insulation resistance 20 MΩ between isolated circuits (at 100 VDC)
Dielectric strength 510 VAC for 1 min between isolated circuits,
leakage current: 5 mA max.
Installation method DIN Track (IEC 60715 TH35-7.5/TH35-15)

 

Unit Specifications

Safety Input Units NX-SIH400/SID800

Unit name Safety Input Unit
Model NX-SIH400 NX-SID800
Number of safety
input points
4 points 8 points
Number of test
output points
2 points 2 points
Internal I/O common PNP (sinking inputs)
Rated input voltage 24 VDC (20.4 to 28.8 VDC)
OMRON special
safety input devices
Can be connected. Cannot be connected.
Number of safety
slave connections
1
I/O refreshing method Free-Run refreshing
External connection
terminals
Screwless clamping terminal block (8
terminals)
Screwless clamping terminal block (16
terminals)
Indicators 3244_sp_3_1 3244_sp_3_2
Safety input current 4.5 mA typical 3.0 mA typical
Safety input
ON voltage
11 VDC min. 15 VDC min.
Safety input OFF
voltage/OFF current
5 VDC max., 1 mA max.
Test output type Sourcing outputs (PNP)
Test output load
current
25 mA max. 50 mA max.
Test output
residual voltage
1.2 V max. (Between IOV and all output terminals)
Test output
leakage current
0.1 mA max.
Dimensions 12 × 100 × 71 mm (W × H × D)
Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated circuits (at 100 VDC)
Dielectric strength 510 VAC for 1 min between isolated circuits, leakage current: 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
1.10 W max.
• Connected to a Communications Coupler
Unit *2
0.70 W max.
• Connected to a CPU Unit or a
Communication Control Unit *1
1.10 W max.
• Connected to a Communications Coupler
Unit *2
0.75 W max.
Current consumption
from I/O power supply
20 mA max.
Weight 70 g max.
Circuit layout 3244_sp_3_3 3244_sp_3_4
Terminal connection
diagram
Si0 to Si3: Safety input terminals
T0 and T1: Test output terminals

3244_sp_3_5

Refer to User’s manual (Cat.No.Z930) for details.

Si0 to Si7: Safety input terminals
T0 and T1: Test output terminals

3244_sp_3_6

Refer to User’s manual (Cat.No.Z930) for details.

Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit or a Communication Control Unit *1
Possible in the upright installation orientation.
• Connected to a Communications Coupler Unit *2
6 possible orientations.
Restrictions: Maximum ambient temperature is 50ºC for any orientation other than upright
installation.
Protective functions Overvoltage protection circuit and short detection (test outputs)

 

*1 It can be connected to the NX102 CPU unit or communication control unit. It cannot be connected to the NX1P2 CPU unit.
*2 The NX-ECC20 EtherCAT Coupler Unit and NX-EIC202 EtherNet/IP Coupler Unit can be connected.