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 CNC. The following drawing shows an example with
4 axes connected.)
< 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
CN1B CN1ACN1B CN1A
CN1B
CN1A
SH21 cable
Connect to the
battery unit with a
terminal connector or
SH21 cable.
MDS-C1-SP-
4th axis (final axis)
MDS-C1-V1-
3rd axis
Connected
to the NC
Refer to the
instruction manual
of each NC for
details.
Max. length of 30m from the NC to terminal connector or battery unit.
CN4
CN4
MDS-C1-CV-
MDS-C1-V2-
1st/2nd axis
Pin No.
CN1A/CN1B
No.1
No.10
No.11
No.20
Name
GND
RD*
AL
SD*
GND
GFO
EMG*
P5(+5V)
11
12
13
14
15
16
17
18
19
20
Name
GND
RD
AL
SD
GND
GFO
EMG
BAT
P5(+5V)
1
2
3
4
5
6
7
8
9
10
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 "4-1-1 Setting the rotary switch".) The axis No. has no relation to the
order for connecting to the NC.
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