YASKAWA E-7-Series SGD7S Product Manual page 109

4.5 I/O Signal Connections
4.5.4 I/O Circuits
 Photocoupler Output Circuits
Photocoupler output circuits are used for the ALM (Servo Alarm), /S-RDY (Servo Ready), and
other sequence output signals. Connect a photocoupler output circuit to a relay or line-receiver
circuit.
SERVOPACK
Note: The maximum allowable voltage and current range for photocoupler output circuits are as follows:
 Line-Driver Output Circuits
This section describes CN1 connector pins 33-34 (Phase-A Signal), 35-36 (Phase-B Signal),
19-20 (Phase-C Signal) and 48-49 (Phase-S Signal).
The serial data from the encoder is converted to two-phase (phases A and B) pulses. The
resulting output signals (PAO, /PAO and PBO, /PBO), origin pulse signal (PCO and /PCO), and
the absolute encoder position output signals (PSO and /PSO) are output with line-driver output
circuits. Connect the line-driver output circuits to line-receiver circuits at the host controller.
4-40
Example for Relay Circuit
5 VDC to 30 VDC
0 V
• Maximum allowable voltage: 30 VDC
• Current range: 5 mA to 50 mA DC
Example for Line-Receiver Circuit
SERVOPACK
Output line driver: Applicable line receiver:
SN75ALS174 or SN75ALS175 or MC3486
the equivalent manufactured by Texas Instruments
or the equivalent
SERVOPACK
Relay
Host controller
220 Ω to
470 Ω
Example for Line-Receiver Circuit
5 VDC to 30 VDC