YASKAWA SGDH User Manual page 381

(2) Sequence Input Circuit Interface
CN1 connector terminals 40 to 47 is explained below.
The sequence input circuit interface connects through a relay or open-collector transistor circuit. Select a low-
current relay otherwise a faulty contact will result.
Relay Circuit Example
24 VDC
Note: The 24 VDC external power supply capacity must be 50 mA minimum.
For SEN input signal circuit, refer to 8.4 Absolute Encoders.
INFO
(3) Sink Circuit and Source Circuit
The SERVOPACK's I/O circuit uses a bidirectional photocoupler. Select either the sink circuit or the source cir-
cuit according to the specifications required for each machine.
24 V
I/O power
supply
+
(4) Output Circuit Interface
There are three types of SERVOPACK output circuits:
(a) Line Driver Output Circuit
CN1 connector terminals, 33-34: phase-A signal, 35-36: phase-B signal and 19-20: phase-C signal are
explained below.
Encoder serial data converted to two-phase (phases A and B) pulse output signals (PAO, /PAO, PBO, /PBO),
zero-point pulse signals (PCO, /PCO), and the amount of phase-S rotation signal are output via line-driver
output circuits. Normally, the SERVOPACK uses this output circuit in speed control to comprise the position
control system at the host controller. Connect the line-driver output circuit through a line receiver circuit at
the host controller.
SERVOPACK
3.3 kΩ
+24VIN
/S-ON, etc.
Sink Circuit
SERVOPACK input
−
6.3 Examples of I/O Signal Connections
Open-collector Circuit Example
SERVOPACK
+24VIN 3.3 kΩ
24 VDC
/S-ON, etc.
24 V
I/O power
supply
−
+
6-17
Source Circuit
SERVOPACK input
6