Yaskawa Σ-V Series AC Servo Drives Rotational Motor Analog Voltage Reference - Manual (Page 109)

5.4 Position Control (Pulse Train Reference)
5-29
5
Op
er
at
io
n
(3) Connection Example
The following diagram shows a connection example. Use an SN75ALS174 or MC3487 manufactured by
Texas Instruments Inc., or equivalent for the line driver.
Line Driver Output
∗ represents twisted-pair wires.
Open-collector Output
Set limit resistor R so the input current, i, falls between 7 mA to 15 mA.
∗ represents twisted-pair wires.
Line driver
SERVOPACK Host controller
CN1
1
2
6
5
4
3
PULS
SIGN
CLR
/PULS
SIGN
/SIGN
CLR
/CLR
PULS
CW
Phase A
CCW
Phase B
∗
150 Ω
4.7 k
Ω
Photocoupler
150 Ω
4.7 k
Ω
Photocoupler
150 Ω
4.7 k
Ω
Photocoupler
FG FG
An
alo
g
• Use a shielded cable for I/O signals and ground both ends of the shield.
• Connect the shield of the cable on the SERVOPACK side to the connector shell so
that the shield will be connected to the frame ground (FG) through the connector.
CN1
1
2
6
5
4
3
/PULS
SIGN
/SIGN
CLR
/CLR
PULS
∗
150 Ω
4.7 k
Ω
4.7 k
Ω
4.7 k
Ω
150 Ω
150 Ω
FG FG
Vcc
Vcc
Vcc
Tr
Tr
Tr
R
R
i
i
i
R
SERVOPACK Host controller
Example
When Vcc is +12 V: R = 1 k Ω
When Vcc is +24 V: R = 2.2 k Ω
When Vcc is +5 V: R = 180 Ω
Note: In case of open-collector outputs,
the signal logic is as follows.
When Tr is ON
High level input or
equivalent
Low level input or
equivalent
When Tr is OFF
Photocoupler
Photocoupler
Photocoupler
Analog