2-Phase 2-Input [C251 To C255] - Mitsubishi FX3U SERIES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
2. When high-speed input special adapter (FX
1) Differential line driver output rotary encoder
In the case of differential line driver wiring
Equivalent to
AM26C32
330Ω
High-speed input
special adapter
* The grounding resistance should be 100Ω or less.

11.10.2 2-phase 2-input [C251 to C255]

The following examples of wiring apply to the cases where C251 is used. When another high-speed counter
number is used, wire the counter referring to the following diagrams.
1. When the input terminals of the main unit are used
When pulses having a response frequency of 50 k to 100 kHz 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.
• For connecting cables, use shielded twisted-pair cables. Ground the shield of each shielded cable only on
the PLC side.
• 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
In the case of sink wiring
X000
X001
PLC
* The grounding resistance should be 100Ω or less.
Input No. of first/second
unit
X000
Twisted-pair
shielded wire
X0/3+
X000
X0/3-
SG
SG
Class D
grounding*
Fuse
L
N
Class D
grounding*
S/S
0V
1.5kΩ
24V
11 Use of High-speed Counters (C235 to C255)
11.10 Examples of External Wiring (Rotary Encoder)
-4HSX-ADP) is used
3U
+
-
Non-inverted
output
Phase A+
Phase A-
Inverted
output
Phase B+
Phase B-
Phase Z+
Phase Z-
Rotary encoder
24V DC
24V
0V
Phase A
Phase B
Phase Z
20mA or
more
Rotary encoder
11
12
13
14
15
16
17
18
19
20
199