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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.

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)
3244_sp_3_1
TS indicator, FS indicator, input indicators
(yellow), and input error indicators (red)
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
0.70 W max. 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 (Z930-E1) for details.
Si0 to Si7: Safety input terminals
T0 and T1: Test output terminals
3244_sp_3_6
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)
3244_sp_4_1
TS indicator, FS indicator, output indicators
(yellow), and output error indicators (red)
3244_sp_4_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
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
3244_sp_4_3
3244_sp_4_4
Terminal connection
diagram
So0 and So1: Safety output terminals
IOG: I/O power supply 0 V
3244_sp_4_5
Refer to User's manual (Z930-E1) for details.
So0 to So3: Safety output terminals
IOG: I/O power supply 0 V
3244_sp_4_6
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.
3244_sp_4_7
For all installation orientations other than
upright installation, the ambient temperature
is restricted as shown below according to the
total Unit load current.
3244_sp_4_8
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 --- ---
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.