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11 Use of High-speed Counters
11.8 Examples of External Wiring (Rotary Encoder)
168
FX3G Series Programmable Controllers
User's Manual - Hardware Edition
11.8 Examples of External Wiring (Rotary Encoder)
11.8.1 1-phase 1-input [C235 to C245]
The following examples of wiring apply to the cases where C235 is used. When another high-speed counter
number is used, wire the counter referring to the following diagrams.
It is recommended to use shielded twisted-pair cables for connection cables. Ground the shield of each
shielded cable only on the PLC side.
1) NPN open collector transistor output rotary encoder
2) PNP open collector transistor output rotary encoder
* The grounding resistance should be 100Ω or less.
PLC
S/S
L
N
24V
0V
24V
Rotary encoder
Class D
grounding*
Fuse
24V DC
In the case of sink wiring
0V
X000
Phase A
Phase B
Phase Z
* The grounding resistance should be 100Ω or less.
PLC
S/S
L
N
24V
0V
24V
Rotary encoder
Class D
grounding*
Fuse
24V DC
In the case of source wiring
0V
X000
Phase A
Phase B
Phase Z