Encoder Pulse Output Circuit - YASKAWA VS-626M5 Instruction Manual

Control Signals

4.7 Encoder Pulse Output Circuit

4
Phase A, B, and C (origin) signals are output from the motor encoder.
An asterisk indicates a reversed signal.
The output signals have the following specifications and can be used for position feedback.
Signal Configuration
J
90° phase-difference, two-phase pulse (A and B), and marker pulse (C)
Output Circuit Configuration
J
The output circuit is a line receiver with RS-422A specifications. Use a line receiver with specifications
matching the RS-422A specifications for signal exchange as shown in the following connection example.
Inverter
Phase A
Phase B
Phase C
Output line driver
SN75174
Fig 4.5 Encoder Pulse Output Circuit
Output Phase
J
Phase A
(PAO)
Phase B
(PBO)
Phase C
(PCO)
Fig 4.6 Output Phase
1 CN
13
PAO
P
*PAO
14
PBO
15
P
*PBO
16
PCO
11
P
12
*PCO
17
P
indicates shielded twisted-pair wires.
Phase A
(PAO)
90°
Phase B
(PBO)
Phase C
(PCO)
(a) Forward
4 -20
Receiver circuit (prepared by user)
R
C
Phase A
T
T
Phase B
C
R
T
T
R Phase C
C
T
T
R 51 to 200Ω
T:
C 47 to 200 F
T: P
Use a line receiver matching
EIA RS-422A standards,
such as the SN75175.
90°
(b) Reverse