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7 Digital Output Units
7 - 20
NX-series Digital I/O Unit User’s Manual (W521)
7-5
Push-pull Output
The Digital Output Units with the ON/OFF response time of 1
μ
s or less use a push-pull output to
increase the speed of the output ON/OFF response.
For this type of the Output Units, use the single load power supply for the I/O power and connected
external devices.
If multiple power supplies are used, the current may flow into the output bits via the diodes built in the
I/O circuit and cause the Output Units to malfunction.
Good Example
Bad Example
Three-wire
device
Additional I/O Power
Supply Unit
Transistor Output Unit
Additional I/O
Power Supply
Unit
Transistor
Output Unit
24 VDC
Three-wire
sensor
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
0
IOG
IOV
IOV
A1
B1
A8
B8
2
IOG
1
IOG
IOV
IOV
3
IOG
IOV
IOG
28.8V DC
A1
B1
A8
B8
24 VDC
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
0
IOG
IOV
IOV
A1
B1
A8
B8
2
IOG
1
IOG
IOV
IOV
3
IOG
OV
2
IOG
OG
IOG
V
B1
1
IO
Three-wire
device
Additional I/O
Power Supply
Unit
Transistor
Output Unit
24 VDC
Three-wire
sensor
28.8V DC
24 VDC
Additional I/O Power
Supply Unit
Transistor Output Unit
A1
B1
A8
B8
Summary of Contents for NX-IA3117
Page 34: ...Sections in this Manual 32 NX series Digital I O Unit User s Manual W521...
Page 52: ...1 Features and System Configuration 1 18 NX series Digital I O Unit User s Manual W521...
Page 56: ...2 Specifications 2 4 NX series Digital I O Unit User s Manual W521...
Page 152: ...5 I O Refreshing 5 36 NX series Digital I O Unit User s Manual W521...
Page 204: ...8 Digital Mixed I O Units 8 8 NX series Digital I O Unit User s Manual W521...
Page 224: ...9 Troubleshooting 9 20 NX series Digital I O Unit User s Manual W521...
Page 230: ...10 Inspection and Maintenance 10 6 NX series Digital I O Unit User s Manual W521...
Page 337: ...I 1 I NX series Digital I O Unit User s Manual W521 Index...
Page 340: ...I 4 NX series Digital I O Unit User s Manual W521 Index...