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NX series I/O 7
Digital input unit (with time stamp function) (24 VDC)
Item Specifications
Model NX-ID3344 NX-ID3444
Name DC input unit
Internal I/O common NPN PNP
Capacity 4 points 4 points
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current
*1
*1. Typical rated current at 24 VDC.
3.5 mA
ON voltage 15 VDC min.
ON current 3 mA min.
OFF voltage 5 VDC max.
OFF current 1 mA max.
ON/OFF response time 100 ns max.
Input filter time No filter
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 Digital isolator
Unit power consumption 0.55 W max.
I/O power supply method Supply from the NX bus
I/O current consumption 30 mA max.
Current capacity of I/O
power supply terminal
0.1 A/terminal max.
I/O refreshing method Time stamp
Terminal block type Screwless push-in terminal
12 terminals (A + B)
Dimensions (W x H x D) 12 × 100 × 71 mm
Weight 65 g max.
Disconnection/
short-circuit detection
Not supported
Protective function Not supported
Terminal wiring
Circuit layout
IOV0 to 3
IN0 to IN3
IOG0 to 3
Terminal block
I/O power supply +
I/O power supply
Internal circuits
Isolation circuit
I/O power supply +
I/O power supply
NX-ID3344
NX-ID3344
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
IN0
IOG0
IOV2
IOV0
A1 B1
A8 B8
IN2
IOG2
IN1
IOG1
IOV3
IOV1
IN3
IOG3
A1 B1
A8 B8
24 VDC
NX-ID3444
NX-ID3444
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
IN0
IOG0
IOV2
IOV0
A1 B1
A8 B8
IN2
IOG2
IN1
IOG1
IOV3
IOV1
IN3
IOG3
A1 B1
A8 B8
24 VDC
Current control
circuit
NX bus
connector
(left)
NX bus
connector
(right)
Power
supply
Current control
circuit
NX bus
connector
(left)
NX bus
connector
(right)
Power
supply
Additional I/O
power supply unit
DC input unit
NX-ID3344
Two-wire
sensor
Three-wire
sensor
Additional I/O
power supply unit
DC input unit
NX-ID3444
Two-wire
sensor
Three-wire
sensor