3 Wiring and Connection
3.5.2 Sequence Input Circuit
3-30
3.5.2
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.
For SEN input signal circuit, refer to
5.9.2 Absolute Data Request Signal (SEN).
The input circuit of the multi-winding drive unit uses bidirectional photocoupler. Select either the sink circuit
or the source circuit according to the specifications required for each machine.
Note:
•
The connection examples in
3.3.3
to
3.3.5
show 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
/S-ON, etc.
Multi-winding drive unit
24 VDC
+24 VIN
24 VDC
3.3 k
Ω
/S-ON, etc.
Multi-winding drive unit
+24 VIN
24 V
+
−
Multi-winding drive unit input
24 V
+
−
Multi-winding drive unit input
