Page top

Building Automation


Industrial Automation


Power Automation & Safety

Bangladesh Distributor

NX-MD

NX-series Digital Mixed I/O Units

NX-MD

Digital Mixed I/O Units for High speed Synchronous Control

about this Product Family

Related Contents

last update: October 11, 2016

General Specification

Item Specification
Enclosure Mounted in a panel
Grounding method Ground to 100 Ω or less
Operating
environment		 Ambient operating
temperature		 0 to 55°C
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 2 kV on power supply line (Conforms to IEC61000-4-4.)
Overvoltage category Category II: Conforms to JIS B3502 and IEC 61131-2.
EMC immunity level Zone B
Vibration resistance
*1		 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 min each in X, Y, and Z directions
(10 sweeps of 10 min each = 100 min total)
Shock resistance *1 Conforms to IEC 60068-2-27. 147 m/s2, 3 times each in X, Y, and Z directions
Applicable standards *2 cULus: Listed (UL508) or Listed (UL 61010-2-201), ANSI/ISA 12.12.01,
EU: EN 61131-2 or EN 61010-2-201, C-Tick or RCM, KC: KC Registration, NK, LR

*1 For the Relay Output Unit, refer to the Digital Input Unit Specifications.
*2 Refer to the OMRON website (http://www.ia.omron.com/support/models/index.html) or consult your OMRON
      representative for the most recent applicable standards for each model.

Digital Mixed I/O Unit Specifications

DC Input/Transistor Output Units (MIL Connector, 30 mm Width)

NX-MD6121-5

Unit name DC Input/Transistor Output Unit Model NX-MD6121-5
Number of points 16 inputs/16 outputs External connection
terminals		 2 MIL connectors (20 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Output
section
(CN1)		 Internal I/O
common		 NPN Input
section
(CN2)		 Internal I/O
common		 For both NPN/PNP
Rated voltage 12 to 24 VDC Rated input
voltage		 24 VDC (15 to 28.8 VDC)
Operating load
voltage range		 10.2 to 28.8 VDC Input current 7 mA typical (at 24 VDC)
Maximum value
of load current		 0.5 A/point, 2 A/Unit ON voltage/ON
current		 15 VDC min./3 mA min.
(between COM and each signal)
Maximum inrush
current		 4.0 A/point, 10 ms max. OFF voltage/OFF
current		 5 VDC max./1 mA max.
(between COM and each signal)
Leakage current 0.1 mA max. ON/OFF response
time		 20 μs max./400 μs max.
Residual voltage 1.5 V max. Input filter time No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms, 16 ms,
32 ms, 64 ms, 128 ms, 256 ms
ON/OFF response
time		 0.1 ms max./0.8 ms max.
Indicators TS indicator, I/O indicators
3388_sp_2_1
Dimensions 30 (W) x 100 (H) x 71 (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 Supply from external source
Current capacity of I/O power
supply terminal		 Without I/O power supply terminals
NX Unit power consumption • Connected to a CPU Unit
1.00 W max.
• Connected to a
Communications Coupler Unit
0.70 W max.
Current consumption from
I/O power supply		 30 mA max.
Weight 105 g max.
Circuit layout 3388_sp_2_2
Installation orientation and
restrictions		 3388_sp_2_3 
Terminal connection
diagram		 3388_sp_2_4
Disconnection/Short-circuit
detection		 Not supported. Protective function Not supported.

NX-MD6256-5

Unit name DC Input/Transistor Output Unit Model NX-MD6256-5
Number of points 16 inputs/16 outputs External connection
terminals		 2 MIL connectors (20 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Output
section
(CN1)		 Internal I/O
common		 PNP Input
section
(CN2)		 Internal I/O
common		 For both NPN/PNP
Rated voltage 24 VDC Rated input
voltage		 24 VDC (15 to 28.8 VDC)
Operating load
voltage range		 20.4 to 28.8 VDC Input current 7 mA typical (at 24 VDC)
Maximum value
of load current		 0.5 A/point, 2 A/Unit ON voltage/ON
current		 15 VDC min./3 mA min.
(between COM and each signal)
Maximum inrush
current		 4.0 A/point, 10 ms max. OFF voltage/OFF
current		 5 VDC max./1 mA max.
(between COM and each signal)
Leakage current 0.1 mA max. ON/OFF response
time		 20 μs max./400 μs max.
Residual voltage 1.5 V max. Input filter time No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms,
4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
ON/OFF response
time		 0.5 ms max./1.0 ms max.
Indicators TS indicator, I/O indicators
3388_sp_3_1
Dimensions 30 (W) x 100 (H) x 71 (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 Supply from external source
Current capacity of I/O power
supply terminal		 Without I/O power supply terminals
NX Unit power consumption • Connected to a CPU 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.
Weight 110 g max.
Circuit layout 3388_sp_3_2
Installation orientation and
restrictions		 3388_sp_3_3 
Terminal connection
diagram		 3388_sp_3_4
Disconnection/Short-circuit
detection		 Not supported. Protective function With load short-circuit protection.

DC Input/Transistor Output Units (Fujitsu Connector, 30 mm Width)

NX-MD6121-6

Unit name DC Input/Transistor Output Unit Model NX-MD6121-6
Number of points 16 inputs/16 outputs External connection
terminals		 2 Fujitsu connectors
(24 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Output
section
(CN1)		 Internal I/O
common		 NPN Input
section
(CN2)		 Internal I/O
common		 For both NPN/PNP
Rated voltage 12 to 24 VDC Rated input
voltage		 24 VDC (15 to 28.8 VDC)
Operating load
voltage range		 10.2 to 28.8 VDC Input current 7 mA typical (at 24 VDC)
Maximum value
of load current		 0.5 A/point, 2 A/Unit ON voltage/
ON current		 15 VDC min./3 mA min.
(between COM and each signal)
Maximum
inrush current		 4.0 A/point, 10 ms max. OFF voltage/
OFF current		 5 VDC max./1 mA max.
(between COM and each signal)
Leakage
current		 0.1 mA max. ON/OFF
response time		 20 μs max./400 μs max.
Residual
voltage		 1.5 V max. Input filter
time		 No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms,
16 ms, 32 ms, 64 ms, 128 ms,
256 ms
ON/OFF
response time		 0.1 ms max./0.8 ms max.
Indicators TS indicator, I/O indicators
3388_sp_4_1		 Dimensions 30 (W) x 100 (H) x 71 (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		 Supply from external source
Current capacity of
I/O power supply
terminal		 Without I/O power supply
terminals
NX Unit power
consumption		 • Connected to a CPU Unit
1.00 W max.
• Connected to a
Communications Coupler Unit
0.70 W max.
Current consumption
from I/O power supply		 30 mA max.
Weight 95 g max.
Circuit layout 3388_sp_4_2
Installation orientation
and restrictions		 3388_sp_4_3
Terminal connection
diagram		 3388_sp_4_4
Disconnection/Short-
circuit detection		 Not supported. Protective function Not supported.

Version Information

Connecting with CPU Units

Refer to the user's manual for the CPU Unit for the CPU Unit to which NX Units can be connected.

NX Unit Corresponding versions *
Model Unit version CPU Unit Sysmac Studio
NX-MD6121-5 Ver.1.0 Ver.1.13 or later Ver.1.17 or higher
NX-MD6121-6
NX-MD6256-5

* 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.

Connecting with Coupler Units

NX Unit Corresponding versions *
Model Unit
Version		 EtherCAT EtherNet/IP
Communi-
cations
Coupler Unit		 NJ/NX-series
CPU Units or
NY-series
Industrial PCs		 Sysmac
Studio		 Communi-
cations
Coupler Unit		 Sysmac
Studio
NX-MD6121-5 Ver.1.0 Ver.1.0 or later Ver.1.05 or later Ver.1.10 or higher Ver.1.0 or later Ver.1.10 or higher
NX-MD6121-6 Ver.1.13 or higher Ver.1.13 or higher
NX-MD6256-5 Ver.1.10 or higher Ver.1.10 or higher

* 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: October 11, 2016

Product Category

© Copyright Kyoto Engineering & Automation Ltd. All Rights Reserved.