CAUTION: Be sure to diode in between "P24" and "PLC" when connecting plural inverters with digital input wiring in common.
The power to the inverter control part can be supplied externally as shown below. Except driving motor, it is possible read and write the parameters by keypad and via communication even the drive itself is not powered.
By having ability inverter doesn’t block the current flowing into itself when it is not powered. This may cause the closed circuit when two or more inverters are connected to common I/O wiring as shown below to result in unexpected turning the on the input. To avoid this closed circuit, please put the diode (rated:50V/0.1A) in the path as described below.
Jumper | Power ON |
| Power ON | |
|
| |||
wire P24 |
| P24 |
| |
PLC |
| PLC |
| |
L |
|
| L |
|
| Input |
|
| Input |
1 | ON | Inserting | 1 | OFF |
|
| |||
Jumper |
| diode |
|
|
Power OFF |
|
|
| |
wire |
| Power OFF | ||
P24 |
| P24 |
| |
PLC |
| PLC |
| |
L |
|
| L |
|
1 |
|
| 1 |
|
Switch |
|
| Switch |
|
OFF |
|
| OFF |
|
Jumper | P24 |
| In case of Source logic | P24 |
|
PLC |
|
| PLC |
| |
wire | L |
|
| L |
|
|
|
|
| ||
|
| Input |
|
| Input |
| 1 | ON |
| 1 | OFF |
|
|
|
| ||
Jumper |
|
|
|
| |
wire P24 |
|
| P24 |
| |
| PLC |
|
| PLC |
|
| L |
|
| L |
|
| 1 |
|
| 1 |
|
Switch |
|
| Switch |
|
|
OFF |
|
| OFF |
|
|
|
|
| 30 |
|
|
