4.5  I/O Signal Connections 
4.5.3  I/O Signal Wiring Examples
4-34
Position Control with a Linear Servomotor 
*1.  represents twisted-pair wires. 
*2. Connect when using an absolute linear encoder. 
*3. The 24-VDC power supply is not provided by Yaskawa. Use a 24-VDC power supply with double insulation or 
reinforced insulation. 
*4. Always use line receivers to receive the output signals. 
Note: If you use a 24-V brake, install a separate power supply for the 24-VDC power supply from other power sup-
plies, such as the one for the I/O signals of the CN1 connector.
If the power supply is shared, the I/O signals may malfunction.
2
+5 V
0 V
SEN
SG
ALO1
ALO2
ALO3
PBO
PCO
/PBO
PAO
/PAO
/PCO
/COIN+
/COIN-
/TG
ON
+
/TG
ON
-
/S-RDY+
ALM+
ALM-
4
27
28
29
30
31
32
26
25
19
33
34
35
36
20
3
18
13
37
38
39
+24 V
+24VIN
4.7 k
Ω
/S-ON
/P-CON
P-OT
N-OT
/ALM-RST
/N-CL
47
+12 V
41
43
42
44
45
/P-CL
46
40
/S-RDY-
PL1
PL2
PL3
PULS
SIGN
CLR
Reverse
Forward
1
SG
FG
/PULS
SIGN
/SIGN
PULS
*1
1.0 k
Ω
1.0 k
Ω
1.0 k
Ω
CN1
14
15
150 
Ω
CLR
/CLR
12
11
150 
Ω
8
7
150 
Ω
PSO
/PSO
48
49
*4
*4
*4
50
TH
Positioning Completion 
(ON for completion)
 *3
Position 
Reference
Phase A
Phase B
Open-collector power supply 
output for reference pulses
Servo ON input 
(servo ON when ON)
Reverse Drive Prohibit input 
(prohibited when OFF)
Forward Drive Prohibit input
(prohibited when OFF)
Alarm Reset input 
(reset when ON)
Reverse External 
Force Limit input
(limit when ON)
Forward External 
Force Limit input
(limit when ON)
Connect shield to connector shell.
Connector 
shell
Proportional Control input 
(Proportional action 
when ON)
Movement Detection Output 
(ON when value 
exceeds the setting)
Servo Ready Output 
(ON when /S-ON signal 
can be received)
Servo Alarm Output 
(OFF for alarm)
SERVOPACK
Absolute Data 
Request input
Alarm Code Output 
Max. allowable voltage: 30 VDC
Max. allowable current: 20 mA DC
Frame ground
Encoder Divided 
Pulse Output, 
Phase A
Encoder Divided 
Pulse Output, 
Phase B
Encoder Divided 
Pulse Output, 
Phase C
Applicable Line Receiver: 
SN75ALS175 or MC3486 
manufactured by Texas 
Instruments or the equivalent
Photocoupler outputs
Max. allowable voltage: 30 VDC
Max. allowable current: 50 mA DC
*2
*4
Absolute linear 
encoder position 
output
Signal ground
Linear Servomotor 
Overheat Protection Input
Sequence input signal 
power supply input