Datasheet

NX series I/O 27
Voltage input unit
Item Specifications
Model NX-AD2603 NX-AD3603 NX-AD4603 NX-AD2604 NX-AD3604 NX-AD4604 NX-AD2608 NX-AD3608 NX-AD4608
Name Voltage input unit
Input range –10 to 10 V
Input method Single-ended input Differential input
Capacity 2 points 4 points 8 points 2 points 4 points 8 points 2 points 4 points 8 points
Input conversion range –5% to 105% (full scale)
Absolute maximum
rating
±15 V
Input impedance 1 Mmin.
Resolution 1/8,000 (full scale) 1/30,000 (full scale)
Overall
accuracy
25°C ±0.2% (full scale) ±0.1% (full scale)
0 to 55°C ±0.4% (full scale) ±0.2% (full scale)
Conversion time 250 s/point 10 s/point
Dielectric strength 510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
Insulation resistance 20 M min. between isolated circuits (at 100 VDC)
Isolation method Between the input and the NX bus: Power = Transformer, Signal = Digital isolator (no isolation between inputs)
Unit power consumption 1.05 W max. 1.10 W max. 1.15 W max. 1.05 W max. 1.10 W max. 1.15 W max. 1.05 W max. 1.10 W max. 1.15 W max.
I/O power supply method Supply from the NX bus No supply
I/O current consumption No consumption
Current capacity of I/O
power supply terminal
0.1 A/terminal max. Without I/O power supply terminals
I/O refreshing method Free-run refreshing Switching synchronous I/O refreshing and
free-run refreshing
Terminal block type Screwless
push-in termi-
nal
8 terminals
(A + B)
Screwless
push-in termi-
nal
12 terminals
(A + B)
Screwless
push-in termi-
nal
16 terminals
(A + B)
Screwless
push-in termi-
nal
8 terminals
(A + B)
Screwless
push-in termi-
nal
12 terminals
(A + B)
Screwless
push-in termi-
nal
16 terminals
(A + B)
Screwless
push-in termi-
nal
8 terminals
(A + B)
Screwless
push-in termi-
nal
12 terminals
(A + B)
Screwless
push-in termi-
nal
16 terminals
(A + B)
Dimensions (W x H x D) 12 × 100 × 71 mm
Weight 70 g max.
Input disconnection
detection
Not supported
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
A1 B1
A8 B8
A1 B1
A8 B8
IOV
IOG
NC
IOV
IOG
NC
Input +
24 V (Sensor power supply +)
0 V (Sensor power supply –/Input –)
Three-wire sensor
Input1+
Input2+
The NC terminal is not connected to the internal circuit.
24 VDC
NX-AD3603
Input +
24 V (Sensor power supply +)
0 V (Sensor power supply –/Input –)
Three-wire sensor
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
IOG
IOV
IOV
A1 B1
A8 B8
IOG
IOG
IOV
IOV
IOG
A1 B1
A8 B8
Input1+ Input2+
Input3+ Input4+
24 VDC
NX-AD4603
Input +
24 V (Sensor power supply +)
0 V (Sensor power supply –/Input –)
Three-wire Sensor
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOG
A1 B1
A8 B8
IOG
IOG
IOG
IOG
IOG IOG
IOG
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
24 VDC
A1 B1
A8
B8
A1 B1
A8 B8
Input1+
Input2+
Input3+ Input4+
Input7+ Input8+
Input5+ Input6+
Terminal wiring
NX-AD2603
Circuit layout
NX-AD2603
AG: Analog circuit internal GND
AMP
IOV
Input1+ to 2+
IOG
AG
Terminal block
I/O power supply +
I/O power supply 
I/O power supply +
I/O power supply 
1 MΩ
NX-AD3603
NX-AD4603
AG
1MΩ
AMP
IOV
IOG
Input1+ to 4+Terminal block
I/O power supply +
I/O power supply 
I/O power supply +
I/O power supply 
AG: Analog circuit internal GND
AG
AMP
Terminal block
I/O power supply +
I/O power supply 
I/O power supply +
I/O power supply 
1 MΩ
AG: Analog circuit internal GND
IOG
Input1+ to 8+
NX bus
connector
(left)
NX bus
connector
(right)
NX bus
connector
(left)
NX bus
connector
(right)
NX bus
connector
(left)
NX bus
connector
(right)
Additional I/O
power supply unit
Voltage input unit
NX-AD2603
Additional I/O
power supply unit
Voltage input unit
NX-AD3603
Additional I/O
power supply unit
Voltage input unit
NX-AD4603
I/O power supply
connection unit