4
AC servo systems
I/O specifications
Main circuit connector (CNA) specifications
Servomotor connector (CNB) specifications
I/O signals (CN1) - Input signals
I/O signals (CN1) - output signals
Encoder connector (CN2)
Serial connector (CN3)
Symbol
Name
Function
L1
Main circuits power supply input
AC power input terminals for the main circuit
L2
L3
L1C
Control circuit power supply input
AC power input terminals for the control circuit
L2C
Symbol
Name
Function
B1
External regeneration resistor connection terminals Up to 400 W: If regenerative energy is high, connect an External
Regeneration Resistor between B1 and B2.
From 750 W to 1.5kW: Normally B2 and B3 are connected. If regenerative energy
is high, remove the short-circuit bar between B2 and
B3 and connect an External Regeneration Resistor between
B1 and B2.
B2
B3
U
Servo motor connection terminals
Terminals for outputs to the servomotor.
V
W
Frame ground
Ground terminal. Ground to 100
Ω
or less.
Pin No.
Signal name
Function
1
+24VIN
Control power supply input for sequence signals: users must provide the +24 V power supply.
Allowable voltage range: 12 to 24 VDC
2
STOP
Emergency Stop Input
Input for emergency stop. Emergency stop function factory default: enable.
3
EXT3
EXT2
EXT1
External Latch Signals
This external signal input latches the current value feedback pulse counter.
Minimal signal width must be 1 ms.
4
5
22
IN1
External general-purpose Input 0 This input is used as external general-purpose input.
6
IN0
External general-purpose Input 1
23
IN2
External general-purpose Input 2
7
PCL
NCL
Forward Torque Limit Input
This signal input selects the torque limit.
8
Reverse Torque Limit Input
19
POT
NOT
Forward Run Prohibit Input
Forward/ reverse drive rotation overtravel input. Stops servomotor when movable
part travels beyond the allowable range of motion.
20
Reverse Run Prohibit Input
21
DEC
Origin Proximity Input
Connect the origin proximity input signal in the origin search operation.
34
BAT
Battery backup input for absolute
encoder
Connecting pin for the absolute backup battery. Do not connect when a battery is
connected to the servomotor encoder cable.
33
BATCOM
Pin No.
Signal name
Function
15
/ALM
The output turns OFF when an alarm is generated in the Servo drive.
16
ALMCOM
29
OUTM2
General-purpose output.
The fucntion for this output is selected by changing the parameter:
INP1 (Positioning completed), VCMP (Speed conformity signal), TGON (Servomotor rotation speed detection), READY
(Servo ready), CLIM (Current limit detection), VLIM (Speed limit detection), BKIR (Brake interlock), WARN (Warning
signal)
30
OUTM2COM
31
OUTM3
32
OUTM3COM
36
OUTM1
35
OUTM1COM
Pin No.
Signal Name
Function
1
E5V
Encoder power 5 V
2
E0V
Encoder power supply ground
3
BAT+
B (used only with absolute encoder)
4
BAT–
Battery – (used only with absolute encoder)
5
PS+
Encoder serial signal input (+phase)
6
PS–
Encoder serial signal input (-phase)
Shell
FG
Shield ground
Pin No.
Signal Name
Function
3
TXD
RS232 send data
4
GND
Ground
5
RXD
RS232 receive data
