NX-SI / SO

Safety I/O Unit

NX-SI / SO

4 or 8 points per Safety Input Unit,2 or 4 points per Safety Output Unit.

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last update: May 09, 2016

Regulations and Standards

Certification body	Standards
TÜV Rheinland *	EN ISO 13849-1: 2008 + AC: 2009 EN ISO 13849-2: 2012 IEC 61508 parts 1-7: 2010 EN 62061: 2005 EN 61131-2: 2007 EN ISO 13850: 2008 EN 60204-1: 2006 + A1: 2009 + AC: 2010 EN 61000-6-2: 2005 EN 61000-6-4: 2007 NFPA 79: 2012 ANSI RIA 15.06-1999 ANSI B11.19-2010 UL1998 IEC 61326-3-1: 2008
UL	cULus: Listed (UL508) and ANSI/ISA 12.12.01

* Certification was received 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, Safety Standard for Safety Instrumented Systems (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 C-Tick and KC compliance.

General Specification

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: Conforms to JIS B3502 and IEC 61131-2.
	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	Category II: Conforms to JIS B3502 and IEC 61131-2.
	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)
Applicable standards		IEC 61508: 2010 SIL 3, EN 62061: 2005 SIL CL3 EN ISO 13849-1, 13849-2: 2008 PL e/Safety Category 4 UL 1998 cULus: Listed UL508, ANSI/ISA 12.12.01 EN 61131-2, C-Tick, KC: KC Registration, NK, LR

Specifications of Individual Units

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	TS indicator, FS indicator, input indicators (yellow), and input error indicators (red)	TS indicator, FS indicator, input indicators (yellow), and input error indicators (red)
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	0.70 W max.	0.75 W max.
Current consumption from I/O power supply	20 mA max.
Weight	70 g max.
Circuit layout
Terminal connection diagram	Si0 to Si3: Safety input terminals T0 and T1: Test output terminals Refer to User's manual (Z930-E1) for details.	Si0 to Si7: Safety input terminals T0 and T1: Test output terminals Refer to User's manual (Z930-E1) for details.
Installation orientation and restrictions	Installation orientation: 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)

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	TS indicator, FS indicator, output indicators (yellow), and output error indicators (red)	TS indicator, FS indicator, output indicators (yellow), and output error indicators (red)
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	0.70 W max.	0.75 W max.
Current consumption from I/O power supply	40 mA max.	60 mA max.
Weight	65 g max.
Circuit layout
Terminal connection diagram	So0 and So1: Safety output terminals IOG: I/O power supply 0 V Refer to User's manual (Z930-E1) for details.	So0 to So3: Safety output terminals IOG: I/O power supply 0 V Refer to User's manual (Z930-E1) for details.
Installation orientation and restrictions	Installation orientation: 6 possible orientations Restrictions: For upright installation, the ambient temperature is restricted as shown below depending on the total Unit load current. For all installation orientations other than upright installation, the ambient temperature is restricted as shown below according to the total Unit load current.	Installation orientation: 6 possible orientations Restrictions: None
Protective functions	Overvoltage protection circuit and short detection

Version Information

The combinations that can be used of the unit versions of the Safety Control Units, NJ/NX-series CPU Units, and NX-series EtherCAT Coupler Unit, and the version of the Sysmac Studio

NX Unit		Corresponding version *
Model number	Unit version	EtherCAT Coupler Unit NX-ECC20[]	NJ/NX-series CPU Units	Sysmac Studio	ErherNet/IP Coupler Unit (NX-EIC202)	Sysmac Studio
NX-SIH400	1.0	1.1 or later	1.06 or later	1.07 or later	---	---
NX-SIH400	1.1			1.10 or later	1.0 or later	1.10 or later
NX-SID800	1.0			1.07 or later
NX-SOH200
NX-SOD400

* Some Units do not have all of the versions given in the above table.
If a Unit does not have the specified version, support is provided by the oldest available version after the specified version.
Refer to the user’s manuals for the specific Units for the relation between models and versions.

last update: May 09, 2016

Product Category

Automation Systems
- Machine Automation Controllers
  - Safety Control Unit NX-Series
    - Safety I/O Unit
      - NX-SI / SO

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