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15
Safety Precautions
NA-series Programmable Terminal Hardware(-V1) User’s Manual (V125)
Additional Information
The internal power supply of the NA5-
W
Product uses an isolated DC power sup-
ply, and therefore is not susceptible to the effects of grounding of the 24 V side.
Precaution
Wiring
Observe the following precautions when wiring the NA5-
W
-V1.
The internal power supply in the NA5-
W
-V1 is a non-isolated DC power supply. Never
ground the 24 V side. If the 24 V power supply to the NA is grounded positively, a short circuit will
occur as shown below and may result in damage to the device.
24 V Grounding Power Supply
NA5-
W
-V1 grounding diagram
WARNING
Internal
non-isolated
power
supply
NA5-
W
-V1
SG
External
non-isolated
device
SG
24 V
0 V
+
GND
Power
Supply
Grounding
Grounding
Protective ground
Functional ground
Shielded
cable
Hood
PC
USB memory device
Hood
Fuse
Fuse
Non-isolated
power
supply
24 VDC
GND
PE (Protective ground)
Ethernet
connector
hood
Serial
connector
hood
USB slave
connector
hood
USB host
connector
hood
FG (Functional ground)
Summary of Contents for NA-series
Page 8: ...Sections in this Manual 6 NA series Programmable Terminal Hardware V1 User s Manual V125 ...
Page 12: ...CONTENTS 10 NA series Programmable Terminal Hardware V1 User s Manual V125 ...
Page 82: ...3 Installation and Wiring 3 22 NA series Programmable Terminal Hardware V1 User s Manual V125 ...
Page 164: ...5 Troubleshooting 5 18 NA series Programmable Terminal Hardware V1 User s Manual V125 ...
Page 179: ...I 1 I NA series Programmable Terminal Hardware V1 User s Manual V125 Index ...
Page 181: ......