Datasheet

16 Remote I/O
Digital output unit (with MIL connector)
Item Specifications
Model NX-OD5121-5 NX-OD5256-5 NX-OD6121-5 NX-OD6256-5
Name Transistor output unit
Internal I/O common NPN PNP NPN PNP
Capacity 16 points 16 points 32 points 32 points
Rated voltage 12 to 24 VDC 24 VDC 12 to 24 VDC 24 VDC
Operating load voltage 10.2 to 28.8 VDC 20.4 to 28.8 VDC 10.2 to 28.8 VDC 20.4 to 28.8 VDC
Maximum value of load
current
0.5 A/point, 2 A/NX unit 0.5 A/point, 2 A/common, 4 A/NX unit
Maximum inrush current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max. 0.5 ms max./1.0 ms max. 0.1 ms max./0.8 ms max. 0.5 ms max./1.0 ms max.
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 Photocoupler isolation
Unit power consumption 0.60 W max. 0.70 W max. 0.80 W max. 1.0 W max.
I/O power supply method Supply from external source
I/O current consumption 30 mA max. 40 mA max. 50 mA max. 80 mA max.
Current capacity of I/O
power supply terminal
Without I/O power supply terminals
I/O refreshing method Switching synchronous I/O refreshing and free-run refreshing
Terminal block type MIL connector
20 terminals
MIL connector
40 terminals
Dimensions (W x H x D) 30 × 100 × 71 mm
Weight 80 g max. 85 g max. 90 g max. 95 g max.
Disconnection/
short-circuit detection
Not supported
Protective function Not supported With load short-circuit protection Not supported With load short-circuit protection
Terminal wiring
Circuit layout
NX-OD5121-5
Internal circuits
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
COM
COM
+V
+V
OUT0 to OUT15
Connector
NX-OD5121-5
1
5
9
3
7
11
15
17
19
13
2
6
10
4
8
12
16
18
20
14
L L
L L
L L
L L
L L
L L
L L
L L
12 to
24 VDC
COM
COM
+V
+V
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT09
OUT08
OUT07
OUT06
OUT05
OUT04
OUT03
OUT02
OUT01
OUT00
NX-OD5256-5
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
0V
0V
COM (+V)
COM (+V)
OUT0 to OUT15
Connector
Internal circuits
Short-circuit
protection
NX-OD5256-5
1
5
9
3
7
11
15
17
19
13
2
6
10
4
8
12
16
18
20
14
L L
L L
L L
L L
L L
L L
L L
L L
24 VDC
0V
0V
COM (+V)
COM (+V)
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT09
OUT08
OUT07
OUT06
OUT05
OUT04
OUT03
OUT02
OUT01
OUT00
NX bus
connector
(left)
NX bus
connector
(left)
NX bus
connector
(right)
NX bus
connector
(right)
Signal
name
Connector
pin
Signal
name
Signal
name
Connector
pin
Signal
name
• Be sure to wire both pins 3 and 4 (COM).
• Be sure to wire both pins 1 and 2 (+V).
• Be sure to wire both pins 1 and 2 (COM (+V)).
• Be sure to wire both pins 3 and 4 (0V).