Relation To The Main Circuit; Selection Of The Main Circuit Wire, No-Fuse Breaker And Electromagnetic Contactor - Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual

5.6 Relation to the main circuit

5.6.1 Selection of the main circuit wire, no-fuse breaker and electromagnetic contactor

Select and prepare the main circuit wire, breaker and electromagnetic contactor for the power/motor
from the following table according to the spindle amplifier capacity.
Amplifier model
MDS-B-SPJ2-02
MDS-B-SPJ2-04
MDS-B-SPJ2-075
MDS-B-SPJ2-15
MDS-B-SPJ2-22
MDS-B-SPJ2-37
MDS-B-SPJ2-55
MDS-B-SPJ2-75
MDS-B-SPJ2-110
MDS-B-SPJ2-110C
(Note 1) The standard wire is a 600V vinyl wire. The wires (U, V, W) in the table are for a distance of 30m or
less between spindle motor and spindle amplifier.
The recommended wire sizes are those selected under conditions corresponding to the power capacity
(short-time rating), when all three wires have the same sensitivity and the ambient temperature is 30°C.
Determine the wire size matching the actual ambient temperature, ambient humidity, wire and wiring
status by conversion, using the table above as a reference.
(Note 2) Wire with a twisted regenerative resistor (P, C) connection wire.
5.6.2 Input/output DIO relay
Use the following relays for the input/output interface (contactor output: MC, etc.)
Interface name
Relay used to turn the digital input signal
ON/OFF
Relay used for digital output signals (MBR,
MC)
5. Connections
Power supply
No-fuse
equipment
breaker
(kVA)
0.5 NF30-type 5A
1.0
NF30-type 10A
2.0
NF30-type 15A
3.0
4.0 NF30-type 20A
7.0 NF30-type 30A
9.0 NF50-type 40A
NF50-type 40A
12.0
17.0 NF50-type 50A
Electro-m
agnetic
L1,L2,L3
contactor
S-N10
(S-K10)
S-N11
2
(S-K11)
S-N18
(S-K18)
3.5
S-N25
(S-K25)
5.5
S-N35
14
(S-K35)
Selection example
Use for minute signals to prevent faulty contacts
(twin contacts).
< Example > OMRON: G2A, MY
Compact relay of 40mA or less for 12 VDC or
24VDC.
< Example > OMRON: MY
5 − 15
2
Wire (mm ) (Note 1)
P,C
L11,L21 U,V,W
(Note 2)
2
1.25
3.5
5.5
8
2
3.5