bnp-b2365(eng)b.pdf - 第48页

2. Wiring and Connection 2 - 9 (2) When using tw o or more pow er supply uni ts within a single NC communication bus system Two or more power supply units may be required within a single NC communication bus system if th…

2. Wiring and Connection

2 - 8

2-3 NC and drive unit connection

The NC bus cables are connected from the NC to each drive unit so that they run in a straight line from

the NC to the terminal connector (battery unit). And up to 7 axes can be connected per system.

Note that the number of connected axes is limited by the NC.

CAUTION

Wire the SH21 cable between the NC and drive unit so that the distance

between the NC and terminal connector (battery unit) is within 30m.

POINT

Axis Nos. are determined by the rotary switch for setting the axis No. (Refer to

section "3-1-1 Setting the rotary switch".) The axis No. has no relation to the

order for connecting to the NC.

(1) When using one power supply unit

Connect the largest-capacity spindle drive unit to the final axis of the NC communication bus in

order to control the power supply unit. The spindle drive unit must be installed adjacent to the power

supply unit. In the system with servo only, a servo drive unit for controlling unbalance axis must be

installed in the same manner in the same way.

< Connection >

CN1A : CN1B connector on NC or previous stage's drive unit

CN1B : CN1A connector on next stage's drive unit or terminal connector (battery unit)

CN4 : Connector for communication between power supply unit (master side) and drive unit

Connect to the battery unit with a

terminal connector or SH21 cable.

Refer to the

instruction manual

of each NC for

details.

Max. len

th of 30m from the NC to terminal connector or batter

unit.

CN1A

SH21 cable

MDS-C1-SP

4th axis (final axis)

MDS-C1-V1

3rd axis

Connected

to the NC

MDS-C1-CV MDS-C1-V2

1st/2nd axis

CN1B CN1A

CN1B

CN1A

CN1B

CN4

Pin No.

CN1A/CN1B

No.1

No.10

No.11

No.20

Name

GND

RD*

SD*

GND

GFO

EMG*

(

+5V

)

Name

GND

GFO

EMG

BAT

(

+5V

)

Connection when using one power supply unit

2. Wiring and Connection

2 - 9

(2) When using two or more power supply units within a single NC communication bus system

Two or more power supply units may be required within a single NC communication bus system if

the spindle drive unit capacity is large. The drive unit receiving power (L+, L-) from each power

supply unit must always have NC communication bus connection at the NC side of each power

supply unit. In the NC communication bus connection example below, power supply [1] cannot

supply power (L+, L-) to the 5th axis servo drive unit.

For basic connection information, refer to "(1) When using one power supply unit".

Connections when using two power supply units within a single NC communication bus system

CAUTION

The drive unit receiving power (L+, L-) from each power supply unit must always

have NC communication bus connection at the NC side of each power supply

unit.

CN1A

SH21 cable

MDS-C1-SP

6th axis

(CV control axis)

MDS-C1-V1

5th axis

Connected

to the NC

MDS-C1-CV

[2]

MDS-C1-V2

1st/2nd axis

CN1B CN1A

CN1B

CN1A

CN1B

CN1A

CN1B

CN4

MDS-C1-V2

3rd/4th axis

(CV control axis)

MDS-C1-CV

[1]

Power

cannot be

supplied

2. Wiring and Connection

2 - 10

(3) When using one power supply shared unit by two NC communication bus systems

In systems employing a number of small-capacity drive units, a single power supply unit can be

shared by two NC communication bus systems. In this case, a power supply control axis must be

set for each axis of each NC communication bus.

For basic connection information, refer to "(1) When using one power supply unit".

Connections when using one power supply shared by two NC communication bus systems

CAUTION

If the two NC communication bus systems include a spindle drive unit, connect

the power supply unit's CN4 connector to the CN4 connector of the largest-

capacity spindle drive unit. If there is no spindle drive unit, connect to the

unbalance-axis servo drive unit.

MDS-C1-SP

12th axis

(CV control axis)

MDS-C1-V1

7th axis

(CV control axis)

CN1A

Connected to the NC

(System No.1)

MDS-C1-CV

(shared)

MDS-C1-V2

1st/2nd axis

CN1B CN1A

CN1B

CN4

MDS-C1-V2

3rd/4th axis

MDS-C1-V2

5th/6th axis

CN1B

CN1A

CN1B

CN1A

MDS-C1-V2

8th/9th axis

CN1B CN1A

MDS-C1-V1

10th axis

MDS-C1-SP

11th axis

CN1A

Connected to the NC

(System No.2)

CN1B

CN1A

CN1B

CN1A

CN1B

CN4

CN9