MH860 series hydraulic servo drive
Electrical connection
17
4 Electrical connection
4.1 Wiring precautions
Warning
1. Only trained and qualified professionals can perform the wiring.
Incorrect wiring may cause electric shock or fire.
2. The drive can be connected directly to an industrial power line. In
other words, no transformer is used for isolation. To prevent
cross-contact electric shock accidents, use the circuit breaker or fuse
with the purpose of wiring.
3. The drive does not have a built-in ground protection circuit. To build a
safer system, please configure a leakage circuit breaker with both
overload
and
short-circuit
protection,
or
configure
a
ground-wire-protection leakage circuit breaker that is used together
with a wiring circuit breaker.
Note
1. It is recommended to use A, B or C grounding method ( grounding
resistance of 10Ω or less ). A point of grounding must be used. When
the motor and mechanical firmware are insulated from each other,
ground the motor directly.
2. Use a thick wire (4.0 mm
2
or greater) for grounding whenever
possible.
3. Most leakage protection switches on the market are electronic
leakage circuit breakers, of which internal leakage current detection
and processing circuits vary greatly with manufacturers. Therefore,
the breakers from different manufacturers are different in
anti-interference ability. It is recommended to use a relatively strong
anti-interference leakage circuit breaker.
4. Route the electrical cables such as power cable and motor input
cable separately from signal cables, with an interval of more than
30cm. Do not put the cables in the same pipe or bundle together.
5. Do not use the same power supply with a welding machine, electrical
discharge processing machine, and so on. Even if different power
supplies are used, when there is a high frequency generator nearby,
connect a noise filter on the input side of the power cable.
6. Install surge suppressors on the coils of relay, solenoid, and
electromagnetic contactor.
7. To prevent malfunction caused by noise, configure the input
command device and noise filter as close as possible to the drive.
8. Select a reasonable cable diameter, switch capacity, and contactor
capacity. For details, see section 4.2 "Switch, contactor, and cable
selection".
Note: Incorrect wiring may cause system faults or personal safety risks.
