Panasonic VF100 Instruction Manual page 26

Precautions on Wiring
1. Use shielded wires for all control signal wires and keep them away more than 20cm
from power lines and strong electric circuits.
2. Maximum control signal wire length is 30m or less.
3. The control circuit's input signal is a minute signal, so use two minute signal contacts
in parallel or use a twin contact to prevent contact faults when inputting the contact.
4. No-voltage contact signal or open-collector signal should be used with control terminals
No. 2 to 8. (If a voltage is applied across these terminals, the inverter may be damaged.)
* Input circuit specifications are shown below. Take special care to avoid loop
or leakage current.
5. When an inductive load is to be driven by an open-collector output, be sure to use a
freewheel diode.
Inverter internal circuit
2kĦ
12V DC
6. For the communication cable, use a double-core cable (VCTF) or twisted pair cable
(with shield). Keep the cable away more than 20cm from power lines and strong electric
circuits.
7. The total length of the communication cable must be 500m or less.
Inverter
internal circuit
Terminals
No. 2 to 8
Terminals
No. 1 and 9
Freewheel diode
Terminals
No.10 and 11
•~
Terminal
No.12
•{
24V DC
Power
supply, etc.
25