198
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
7 Examples of Wiring for Various Uses
7.4 Digital Switch [DSW (FNC 72)/BIN (FNC 19)]
b) Sink/source common input type extension block
Use the sink/source common input, source only output type main unit, a sink/source common input
type input extension block.
The wiring example is the [FX
3UC-32MT/DSS] + input extension block [FX2NC-16EX-DS].
2) In the case of source wiring
Use the sink/source common input, source only output type main unit, a sink/source common input type
input extension block.
The wiring example is the [FX
3UC-32MT/DSS] + input extension block [FX2NC-16EX-DS].
COM0
X020 X021 X022 X023 X025X024 X026 X027
12481248
10
1
10
0
+
-
Fuse
24V DC
Class D
grounding*
FX
2NC
-16EX-DS
Sink input
FX
3UC
-32MT/DSS
* The grounding resistance should be 100
Ω
or less.
COM0
X020 X021 X022 X023 X025X024 X026 X027
12481248
10
1
10
0
+
-
Fuse
24V
DC
Class D
grounding*
FX
2NC
-16EX-DS
Source input
FX
3UC
-32MT/DSS
* The grounding resistance should be 100
Ω
or less.