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12 Output Wiring Procedures
12.2 External Wiring of Transistor Output (Sink/Source) Type
178
FX
3G
Series Programmable Controllers
User's Manual - Hardware Edition
12.2
External Wiring of Transistor Output (Sink/Source) Type
This section explains the procedures for handling transistor output and external wiring.
For the transistor output specifications, refer to the following.
→
For the specifications on the main unit, refer to Subsection 4.4.2.
→
For the specifications on the input/output powered extension unit, refer to Chapter 15.
→
For the specifications on the input/output extension block, refer to Chapter 16.
12.2.1 Transistor Output Sink and Source
FX
3G
Series main units, FX
2N
Series input/output extension units/blocks of transistor sink output type and of
transistor source output type are available.
1. Differences in circuit
• Sink output [-common]
Output to make load current flow into the output (Y) terminal is
called sink output.
• Source output [+common]
Output to make load current flow out of the output (Y) terminal is
called source output.
Load
Y
Fuse DC
power
supply
COM
Load
Y
Fuse DC
power
supply
+V