3 Wiring and Connection
3.7.1 Encoder Signal (CN21) Names and Functions
3-36
3.7
Encoder Connection
This section describes the multi-winding drive unit’s encoder signal (CN21) names, functions, and connection
examples.
3.7.1
Encoder Signal (CN21) Names and Functions
The following table shows the names and functions of encoder signals (CN21).
∗
These do not need to be connected for an incremental encoder.
3.7.2
Encoder Connection Examples
The following diagrams show connection examples of the encoder, the multi-winding drive unit, and the host
controller.
(1) Incremental Encoder
∗1.
The pin arrangement for wiring connectors varies in accordance with the servomotor that is used.
∗2.
To prevent the influence of external noise, we recommend you connect a ferrite core on the motor end of the encoder
cable using two turns.
∗3.
: represents shielded twisted-pair wires.
Signal Name
Pin No.
Function
PG 5 V
1
Encoder power 5 V
PG 0 V
2
Encoder power supply 0 V
BAT (+)*
3
Battery (+)
BAT (-)*
4
Battery (-)
PS
5
Serial data (+)
/PS
6
Serial data (-)
Shield
Shell
–
35
0 V
SG
1
PA O
/PAO
PBO
/PBO
PCO
/PCO
1
2
5
6
CN21
33
34
36
19
20
ENC
CN1
Incremental encoder
Connector shell
Connector
shell
Phase A
Phase B
Phase C
Multi-winding drive unit
∗
3
CN1
∗
1
∗
2
PS
FG
/PS
PG5V
PG0V
0 V
Phase A
Phase B
Phase C
Host controller
R
R
R
Shielded wire
∗
3
Output line-driver SN75ALS174
manufactured by Texas
Instruments or the equivalent
R (terminating resistance): 220 to 470
Ω
Applicable line receiver: SN75ALS175 or MC3486
manufactured by Texas
Instruments, or the equivalent
ME-
CHA