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NX-SI / SO

Safety I/O Unit

NX-SI / SO

Build a simple and flexible safety system

Regulations and Standards

NX-series Safety I/O Units NX-SI/SO

Certification body Standards
TÜV Rheinland * • 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

* The FSoE was certified for applications in which OMRON FSoE devices are connected to each other.

The NX-series Safety Control Units allow you to build a safety control system that meets the following standards.
• Requirements for SIL 3 (Safety Integrity Level 3) in IEC 61508, EN 62061, (Functional Safety of Electrical/Electronic/
  Programmable Electronic Safety-related Systems)
• Requirements for PLe (Performance Level e) and for safety category 4 in EN ISO13849-1

The NX-series Safety Control 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 csm001105361_sp_11_1 csm001105361_sp_11_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 1.10 W max.
• Connected to a Communications
Coupler Unit 0.70 W max.
• 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 csm001105361_sp_11_3 csm001105361_sp_11_4
Terminal connection
diagram
Si0 to Si3: Safety input terminals
T0 and T1: Test output terminals
csm001105361_sp_11_5

Refer to User's manual (Cat.No.Z930) for details.
Si0 to Si7: Safety input terminals
T0 and T1: Test output terminals
csm001105361_sp_11_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 *
Possible in the upright installation orientation.
• Connected to a Communications Coupler Unit
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)

* It can be connected to the NX102 CPU unit or communication control unit. It cannot be connected to the NX1P2 CPU unit.

Safety Output Units NX-SOH200/SOD400

Unit name Safety Output Unit
Model NX-SOH200 NX-SOD400
Number of safety
output points
2 points 4 points
Internal I/O common PNP (sourcing outputs)
Maximum load
current
2.0 A/point
4.0 A/Unit at 40°C
2.5 A/Unit at 55°C
The maximum load current depends on
the installation orientation and ambient
temperature
0.5 A/point and 2.0 A/Unit
Rated voltage 24 VDC (20.4 to 28.8 VDC)
Number of safety
slave connections
1
I/O refreshing method Free-Run refreshing
External connection
terminals
Screwless clamping terminal block (8 terminals)
Indicators csm001105361_sp_12_1 csm001105361_sp_12_2
Safety output ON
residual voltage
1.2 V max. (Between IOV and all output terminals)
Safety output OFF
residual voltage
2 V max. (Between IOG and all output terminals)
Safety 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
IOG: 2 A max./terminal IOG (A3 and B3): 2 A max./terminal
IOG (A7 and B7): 0.5 A max./terminal
NX Unit power
consumption
• Connected to a CPU Unit or a
Communication Control Unit
1.05 W max.
• Connected to a
Communications Coupler Unit
0.70 W max.
• 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
40 mA max. 60 mA max.
Weight 65 g max.
Circuit layout csm001105361_sp_12_3 csm001105361_sp_12_4
Terminal connection
diagram
So0 and So1: Safety output terminals
IOG: I/O power supply 0 V
csm001105361_sp_12_5

Refer to User's manual (Cat.No.Z930)
for details.
So0 to So3: Safety output terminals
IOG: I/O power supply 0 V
csm001105361_sp_12_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 *
Possible in the upright installation
orientation.
• Connected to a Communications
Coupler Unit 6 possible orientations
Restrictions:
For upright installation, the ambient
temperature is restricted as shown
below depending on the total Unit
load current.
csm001105361_sp_12_7

For all installation orientations other
than upright installation, the ambient
temperature is restricted as shown
below according to the total Unit load
current.
csm001105361_sp_12_8
Installation orientation:
• Connected to a CPU Unit or a
Communication Control Unit *
Possible in the upright installation
orientation.
• Connected to a Communications
Coupler Unit 6 possible orientations
Restrictions: None
Protective functions Overvoltage protection circuit and short detection

* It can be connected to the NX102 CPU unit or communication control unit. It cannot be connected to the NX1P2 CPU unit.

Function Specifications

Refer to the SYSMAC-SE[][][] Datasheet for function specifications of the Safety Control Unit.

Version Information

This section describes the possible combinations of versions of Safety I/O Units, NJ/NX-series CPU Units, and Communications Coupler Units.

Safety Control Unit
model and version
NX bus master:
NX102 CPU Unit
NX bus master:
EtherCAT Coupler Unit
Sysmac Studio
Model Unit version NX102 CPU unit Communications
Coupler Unit
NJ/NX1P/NX7
CPU Unit
NX-SIH400 Ver.1.0 Ver.1.30 or later Ver.1.2 or later Ver.1.06 or later Ver.1.22 or higher
Ver.1.1
NX-SID800 Ver.1.0 Ver.1.30 or later Ver.1.1 or later Ver.1.06 or later Ver.1.22 or higher
NX-SOD400 Ver.1.0 Ver.1.30 or later Ver.1.1 or later Ver.1.06 or later Ver.1.22 or higher
NX-SOD200 Ver.1.0 Ver.1.30 or later Ver.1.1 or later Ver.1.06 or later Ver.1.22 or higher