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3-1 Servo Drive Specifications
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
   3
Specifications
External Encoder Input Signals Table
External Encoder I/O (CN4)
*  Connect external encoder signals to the serial interface (+EXS/−EXS) or 90° phase difference inputs 
according to the encoder type.
Example of Connection with External Encoder
 90° Phase Difference Output Type (Pn323 = 0)
Pin 
number
Symbol Name Function and interface
1 E5V External encoder power 
supply output
External encoder power supply: 5.2 VDC ± 5%, 250 
mA max.
If the above capacity is exceeded, provide a 
separate power supply.
2E0V
3 +EXS External encoder signal 
serial interface
This is an external encoder serial bi-directional 
signal.*(Conforming to EIA485)
Maximum response frequency: 400 Mpps
4 −EXS
5 +EXA
External encoder signal
90° phase difference input
(Phases A, B and Z)
This is an external encoder 90° phase input signal.*
Maximum response frequency: 4 Mpps (quadruple 
multiplier)
6 −EXA
7 +EXB
8 −EXB
9 +EXZ
10 −EXZ
EXA
EXB
t1
t1
t1
t1
t2
t1>0.25 μs
t2>1.0 μs
Servo Drive side (CN4)
5.2 V 
±
5% 250 mA max
+EXZ
−
EXZ
9
10
−
EXA
+EXA
GND
E5V
5 V
E0V
6
5
2
1
+EXB
−
EXB
7
8
FG
FG
+5 V
0 V
PA
/PA
PB
/PB
PC
/PC
FG
Power supply area
Phase Z
Phase A
Phase B
Shell
External encoder side
PULS
20 k
Ω
2 k
Ω
20 k
Ω
120 
Ω
2 k
Ω
PULS
20 k
Ω
2 k
Ω
20 k
Ω
120 
Ω
2 k
Ω
PULS
20 k
Ω
2 k
Ω
20 k
Ω
120 
Ω
2 k
Ω