Sharp CP-SR421 User Manual download pdf (Page 253)

11. Options and peripheral devices

11 - 36

11.10 Molded case circuit breakers, fuses, magnetic contactors

(1) For main circuit power supply

Always use one molded case circuit breaker and one magnetic contactor with one servo amplifier. When

using a fuse instead of the molded case circuit breaker, use the one having the specifications given in

this section.

Molded case circuit breaker (Note 1) Fuse

Servo amplifier

Frame, rated current

Voltage

AC [V]

Class

Current

[A]

Voltage

AC [V]

Magnetic

contactor

(Note 2)

MR-J4-10B

MR-J4-20B

30 A frame 5 A 10

MR-J4-40B 30 A frame 10 A 15

MR-J4-60B

MR-J4-70B

MR-J4-100B

30 A frame 15 A 20

S-N10

MR-J4-200B 30 A frame 20 A 40 S-N18

MR-J4-350B 30 A frame 30 A 70 S-N20

MR-J4-500B 50 A frame 50 A 125 S-N35

MR-J4-700B 100 A frame 75 A

240 T

150

300

S-N50

Note 1. To comply with the UL/CSA standard, use the wires shown in appendix 8 for wiring.

2. Use a magnetic contactor with an operation delay time (interval between current being applied to

the coil until closure of contacts) of 80 ms or less.

(2) For control circuit power supply

If wires for L11 and L21 are slimmer than wires for L1, L2, and L3, use a molded case circuit breaker or

fuse to protect the branch circuit.

Molded case circuit breaker (Note) Fuse (Class T) Fuse (Class K5)

Servo amplifier

Frame, rated current Voltage AC [V] Current [A] Voltage AC [V] Current [A] Voltage AC [V]

MR-J4-10B

MR-J4-20B

MR-J4-40B

MR-J4-60B

MR-J4-70B

MR-J4-100B

30 A frame 5 A 240 1 300 1 250

MR-J4-200B

MR-J4-350B

MR-J4-500B

MR-J4-700B

Note. To comply with the UL/CSA standard, use the wires shown in appendix 8 for wiring.

11.11 Power factor improving DC reactors

The following shows the advantages of using power factor improving DC reactor.

It improves the power factor by increasing the form factor of the servo amplifier's input current.

It decreases the power supply capacity.

The input power factor is improved to be about 85%.

As compared to the power factor improving AC reactor (FR-HAL), it decreases the loss.

When connecting the power factor improving DC reactor to the servo amplifier, always disconnect P3 and

P4. If it remains connected, the effect of the power factor improving DC reactor is not produced.

When used, the power factor improving DC reactor generates heat. To release heat, therefore, leave a 10

cm or more clearance at each of the top and bottom, and a 5 cm or more clearance on each side.

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Sharp CP-SR421 User Manual Page 253

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