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3.5 Examples of Connection to Host Controller
3-23
3
Wirin
g and
Co
nnectio
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3.5
Examples of Connection to Host Controller
This section provides examples of multi-winding drive unit and SERVOPACK I/O signal connections to the
host controller.
3.5.1
Sequence Input Circuit
(1) Photocoupler Input Circuit
Multi-winding drive unit CN1 connector pins 40 to 47 are explained below.
The sequence input circuit interface is connected through a relay or open-collector transistor circuit. When
connecting through a relay, use a low-current relay. If a low-current relay is not used, a faulty contact may
result.
Note: The 24 VDC external power supply capacity must be 50 mA minimum.
The multi-winding drive unit’s input circuit uses a bidirectional photocoupler. Select either the sink circuit or
the source circuit according to the specifications required for each machine.
Note:
•
The connection example in 3.3.3 shows sink circuits.
• The ON/OFF polarity differs between when a sink circuit is connected and when a source circuit is connected.
Relay Circuit Example Open-collector Circuit Example
Sink Circuit Source Circuit
Input Signal Polarities Input Signal Polarities
Signal Level
Voltage
Level
Contact Signal Level
Voltage
Level
Contact
ON
Low (L)
level
0 V Close ON
High (H)
level
24 V Close
OFF
High (H)
level
24 V Open OFF
Low (L)
level
0 V Open
3.3 k
Ω
/DEC, etc.
Multi-winding drive unit
24 VDC
+24 VIN 24 VDC
3.3 k
Ω
/DEC, etc.
Multi-winding drive unit
+24 VIN
24 V
+
- Multi-winding drive unit input
24 V
+
-
Multi-winding drive unit input