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NX-AD

NX-series Analog Input Unit

NX-AD

Analog Inputs to meet all machine control needs; from generalpurpose inputs to high-speed synchronous, high-resolution units

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 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 Conforms to IEC 60068-2-27. 147 m/s2, 3 times each in X, Y, and
Z directions
Applicable standards * cULus: Listed (UL508), ANSI/ISA 12.12.01, EU: EN 61131-2, C-Tick
or RCM, KC Registration, NK, LR

* Ask your OMRON representative for the most recent applicable standards for each model.

Analog Input Unit Specifications

Analog Input Unit (voltage input type) 2 points NX-AD2603

Unit name Analog Input Unit
(voltage input type)
Model NX-AD2603
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_2_1
Input method Single-ended input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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 the NX bus Current capacity of
I/O power supply
terminal
IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
1.35 W max.
• Connected to a Communi-
cations Coupler Unit
1.05 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_2_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_2_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 2 points NX-AD2604

Unit name Analog Input Unit
(voltage input type)
Model NX-AD2604
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_3_1
Input method Differential Input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.35 W max.
• Connected to a Communi-
cations Coupler Unit
1.05 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_3_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_3_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 2 points NX-AD2608

Unit name Analog Input Unit
(voltage input type)
Model NX-AD2608
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicator TS indicator
3187_sp_4_1
Input method Differential Input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/30000 (full scale)
Overall
accuracy
25℃ ±0.1% (full scale)
0 to 55℃ ±0.2% (full scale)
Conversion time 10 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.35 W max.
• Connected to a Communi-
cations Coupler Unit
1.05 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_4_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_4_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 4 points NX-AD3603

Unit name Analog Input Unit
(voltage input type)
Model NX-AD3603
Number of points 4 points External connection
terminals
Screwless clamping terminal block
(12 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_5_1
Input method Single-ended input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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 the NX bus Current capacity of
I/O power supply
terminal
IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
1.35 W max.
• Connected to a Communi-
cations Coupler Unit
1.10 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_5_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_5_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 4 points NX-AD3604

Unit name Analog Input Unit
(voltage input type)
Model NX-AD3604
Number of points 4 points External connection
terminals
Screwless clamping terminal block
(12 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_6_1
Input method Differential Input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.35 W max.
• Connected to a Communi-
cations Coupler Unit
1.10 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_6_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_6_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 4 points NX-AD3608

Unit name Analog Input Unit
(voltage input type)
Model NX-AD3608
Number of points 4 points External connection
terminals
Screwless clamping terminal block
(12 terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicator TS indicator
3187_sp_7_1
Input method Differential Input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/30000 (full scale)
Overall
accuracy
25℃ ±0.1% (full scale)
0 to 55℃ ±0.2% (full scale)
Conversion time 10 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.45 W max.
• Connected to a Communi-
cations Coupler Unit
1.10 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_7_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_7_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 8 points NX-AD4603

Unit name Analog Input Unit
(voltage input type)
Model NX-AD4603
Number of points 8 points External connection
terminals
Screwless clamping terminal block
(16 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_8_1
Input method Single-ended input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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 the NX bus Current capacity of
I/O power supply
terminal
IOG: 0.1 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
1.45 W max.
• Connected to a Communi-
cations Coupler Unit
1.15 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_8_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_8_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 8 points NX-AD4604

Unit name Analog Input Unit
(voltage input type)
Model NX-AD4604
Number of points 8 points External connection
terminals
Screwless clamping terminal block
(16 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_9_1
Input method Differential Input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.45 W max.
• Connected to a Communi-
cations Coupler Unit
1.15 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_9_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_9_3
Input disconnection
detection
Not supported.

Analog Input Unit (voltage input type) 8 points NX-AD4608

Unit name Analog Input Unit
(voltage input type)
Model NX-AD4608
Number of points 8 points External connection
terminals
Screwless clamping terminal block
(16 terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicator TS indicator
3187_sp_10_1
Input method Differential Input
Input range -10 to +10 V
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 MΩ min.
Resolution 1/30000 (full scale)
Overall
accuracy
25℃ ±0.1% (full scale)
0 to 55℃ ±0.2% (full scale)
Conversion time 10 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.45 W max.
• Connected to a Communi-
cations Coupler Unit
1.15 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_10_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_10_3
Input disconnection
detection
Not supported.

Analog Input Unit (current input type) 2 points NX-AD2203

Unit name Analog Input Unit
(current input type)
Model NX-AD2203
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_11_1
Input method Single-ended input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 250 Ω min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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 the NX bus Current capacity of
I/O power supply
terminal
IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
1.25 W max.
• Connected to a Communi-
cations Coupler Unit
0.90 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_11_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_11_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 2 points NX-AD2204

Unit name Analog Input Unit
(current input type)
Model NX-AD2204
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_12_1
Input method Differential Input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 250 Ω min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.25 W max.
• Connected to a Communi-
cations Coupler Unit
0.90 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_12_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_12_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 2 points NX-AD2208

Unit name Analog Input Unit
(current input type)
Model NX-AD2208
Number of points 2 points External connection
terminals
Screwless clamping terminal block
(8 terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicator TS indicator
3187_sp_13_1
Input method Differential Input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 250 Ω
Resolution 1/30000 (full scale)
Overall
accuracy
25℃ ±0.1% (full scale)
0 to 55℃ ±0.2% (full scale)
Conversion time 10 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.25 W max.
• Connected to a Communi-
cations Coupler Unit
0.90 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_13_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_13_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 4 points NX-AD3203

Unit name Analog Input Unit
(current input type)
Model NX-AD3203
Number of points 4 points External connection
terminals
Screwless clamping terminal block
(12 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_14_1
Input method Single-ended input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 250 Ω min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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 the NX bus Current capacity of
I/O power supply
terminal
IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
1.25 W max.
• Connected to a Communi-
cations Coupler Unit
0.90 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_14_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_14_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 4 points NX-AD3204

Unit name Analog Input Unit
(current input type)
Model NX-AD3204
Number of points 4 points External connection
terminals
Screwless clamping terminal block
(12 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_15_1
Input method Differential Input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 250 Ω min.
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.25 W max.
• Connected to a Communi-
cations Coupler Unit
0.90 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_15_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_15_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 4 points NX-AD3208

Unit name Analog Input Unit
(current input type)
Model NX-AD3208
Number of points 4 points External connection
terminals
Screwless clamping terminal block
(12 terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicator TS indicator
3187_sp_16_1
Input method Differential Input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 250 Ω min.
Resolution 1/30000 (full scale)
Overall
accuracy
25℃ ±0.1% (full scale)
0 to 55℃ ±0.2% (full scale)
Conversion time 10 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.30 W max.
• Connected to a Communi-
cations Coupler Unit
0.95 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_16_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_16_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 8 points NX-AD4203

Unit name Analog Input Unit
(current input type)
Model NX-AD4203
Number of points 8 points External connection
terminals
Screwless clamping terminal block
(16 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_17_1
Input method Single-ended input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 85 Ω
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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 the NX bus Current capacity of
I/O power supply
terminal
IOV: 0.1 A/terminal max.
NX Unit power
consumption
• Connected to a CPU Unit
1.40 W max.
• Connected to a Communi-
cations Coupler Unit
1.05 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_17_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_17_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 8 points NX-AD4204

Unit name Analog Input Unit
(current input type)
Model NX-AD4204
Number of points 8 points External connection
terminals
Screwless clamping terminal block
(16 terminals)
I/O refreshing method Free-Run refreshing
Indicator TS indicator
3187_sp_18_1
Input method Differential Input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 85 Ω
Resolution 1/8000 (full scale)
Overall
accuracy
25℃ ±0.2% (full scale)
0 to 55℃ ±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.40 W max.
• Connected to a Communi-
cations Coupler Unit
1.05 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_18_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_18_3
Input disconnection
detection
Supported.

Analog Input Unit (current input type) 8 points NX-AD4208

Unit name Analog Input Unit
(current input type)
Model NX-AD4208
Number of points 8 points External connection
terminals
Screwless clamping terminal block
(16 terminals)
I/O refreshing method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicator TS indicator
3187_sp_19_1
Input method Differential Input
Input range 4 to 20 mA
Input conversion
range
-5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 85 Ω
Resolution 1/30000 (full scale)
Overall
accuracy
25℃ ±0.1% (full scale)
0 to 55℃ ±0.2% (full scale)
Conversion time 10 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus:
Power = Transformer, Signal =
Digital isolator (no isolation between
inputs)
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
No supply Current capacity of
I/O power supply
terminal
Without I/O power supply terminals
NX Unit power
consumption
• Connected to a CPU Unit
1.45 W max.
• Connected to a Communi-
cations Coupler Unit
1.10 W max.
I/O current
consumption
No consumption
Weight 70 g max.
Circuit layout 3187_sp_19_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3187_sp_19_3
Input disconnection
detection
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 Units Corresponding versions *
Model Unit version CPU Unit Sysmac Studio
NX-AD[][][][] Ver.1.0 Ver.1.13 or later Ver.1.17 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.

Connecting with Coupler Units

NX Units Corresponding versions *
Model Unit
version
EtherCAT EtherNet/IP
Communica-
tions
Coupler Unit
NJ/NX-series
CPU Units or
NY-series
Industrial PCs
Sysmac Studio Communica-
tions
Coupler Unit
Sysmac Studio
NX-AD[][][][] Ver.1.0 Ver.1.0 or later Ver.1.05 or later Ver.1.06 or higher Ver.1.0 or later 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.