6 Digital Input Units
6 - 2
NX-series Digital I/O Unit User’s Manual (W521)
6-1 Types of Digital Input Units
Digital Input Units are parts of NX Units, and process inputs of digital signals (ON/OFF signals).
The Digital Input Unit types are described below.
DC Input Units (Screwless Clamping Terminal Block, 12 mm Width)
Model
Num
ber
of
poin
ts
Internal I/O
common
Rated input
voltage
I/O refreshing
method
ON/OFF response
time
Reference
NX-ID3317
4
point
s
NPN
12 to 24 VDC
Switching Synchro-
nous I/O refreshing
and Free-Run
refreshing
20 μs max./400 μs
max.
P. A - 7
NX-ID3343
24 VDC
100 ns max./100 ns
max.
P. A - 8
NX-ID3344
Input refreshing with
input changed time
only
P. A - 9
NX-ID3417
PNP
12 to 24 VDC
Switching Synchro-
nous I/O refreshing
and Free-Run
refreshing
20 μs max./400 μs
max.
P. A - 1 0
NX-ID3443
24 VDC
100 ns max./100 ns
max.
P. A - 11
NX-ID3444
Input refreshing with
input changed time
only
P. A - 1 2
NX-ID4342
8
point
s
NPN
Switching Synchro-
nous I/O refreshing
and Free-Run
refreshing
20 μs max./400 μs
max.
P. A - 1 3
NX-ID4442
PNP P. A-14
NX-ID5342
16
point
s
NPN P. A-15
NX-ID5442
PNP P. A-16
DC Input Units (MIL Connector, 30 mm Width)
Model
Num
ber
of
poin
ts
Internal I/O
common
Rated input
voltage
I/O refreshing
method
ON/OFF response
time
Reference
NX-ID5142-5
16
point
s
For both
NPN/PNP
24 VDC
Switching Synchro-
nous I/O refreshing
and Free-Run
refreshing
20
μ
s max./400
μ
s
max.
P. A - 1 7
NX-ID6142-5
32
point
s
For both
NPN/PNP
24 VDC P. A-19