Mitsubishi FX3UC Series User Manual

188
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
7 Examples of Wiring for Various Uses
7.2 Rotary Encoder [High-speed Counters C235 to C255]
7.2 Rotary Encoder [High-speed Counters C235 to C255]
7.2.1 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.
→ For input allocation in high-speed counters, refer to Subsection 5.5.2.
Caution
As connecting cables, use shielded twisted-pair cables. Ground the shield of each shielded cable only on the
PLC side.
When pulses having a response frequency of 50 to 100kHz are captured to the high-speed counter using
the input terminals X000 to X005, wire the counter as stated below.
• The wiring length should be 5m (16’4") or less.
• Connect a bleeder resistance of 1.5kΩ (1W or more) to the input terminal, so that the sum of the load
current of the open collector transistor output on the mating device side and the input current of the main
unit is 20mA or more.
1. NPN open collector transistor output rotary encoder
1) In case of the FX3UC-MT/D, FX3UC-32MT-LT
2) In case of the FX
3UC-MT/DSS [Sink input wiring]
PLC
COM
+
-
X000
* The grounding resistance should be 100 Ω or less.
Rotary encoder
Class D
grounding*
Fuse
24V DC
1.5
k
Ω
0V
24V
Phase A
Phase B
Phase Z
PLC
COM0
+
-
* The grounding resistance should be 100 Ω or less.
Rotary encoder
Class D
grounding*
Fuse
24V DC
X000
Phase A
Phase B
Phase Z
0V
24V
1.5
k
Ω

Mitsubishi FX3UC Series Specifications

General

Brand	Mitsubishi
Model	FX3UC Series
Category	Controller
Language	English