Instruction manual

A - 12

(4) Power supply

(a) This servo amplifier can be supplied from star-connected supply with earthed neutral point of

overvoltage category III set forth in IEC60664-1. However, when using the neutral point of 400V system

for single phasesupply, a reinforced reinforced insulating transformer is required in the power input

section.

(b) When supplying interface power from external, use a 24VDC power supply which has been insulation-

reinforced in I/O.

(5) Grounding

(a) To prevent an electric shock, always connect the protective earth (PE) terminals (marked

) of the

servo amplifier to the protective earth (PE) of the control box.

(b) Do not connect two ground cables to the same protective earth (PE) terminal. Always connect the

cables to the terminals one-to-one.

PE terminals

servo amplifier must be connected to the corresponding earth terminals.

(6) Wiring

The cables to be connected to the terminal block of the servo amplifier must have crimping terminals

provided with insulating tubes to prevent contact with adjacent terminals.

Crimping terminal

Insulating tube

Cable

(7) Auxiliary equipment and options

(a) The no-fuse breaker and magnetic contactor used should be the EN or IEC standard-compliant

products of the models described in MR-J3-B Servo amplifier Instruction Manual Section 11.12.

Use a type B (Note) breaker. When it is not used, provide insulation between the servo amplifier and

other device by double insulation or reinforced insulation, or install a transformer between the main

power supply and servo amplifier.

Note. Type A: AC and pulse detectable

Type B: Both AC and DC detectable

(b) The sizes of the cables described in Section 4.2 meet the following requirements. To meet the other

requirements, follow Table 5 and Appendix C in EN60204-1.

Ambient temperature: 40 (104) [°C (°F)]

Sheath: PVC (polyvinyl chloride)

Installed on wall surface or open table tray