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18
M’Ax Installation Guide
www.controltechniques.com
Issue Number: 6
2.30
Method of connecting the power
cables
The
and 0V terminals are not connected together
inside the drive. It is essential that the ground
connections from the AC supply and to the motor are
made to the ground bracket as shown.
For electrical safety, the ground bracket must be fitted as shown. See
also section 2.31 Circuit diagrams for the power connections on page 19
and section 2.29 Terminal sizes and tightening torques on page 17.
Perform all of the following:
1.
Fit a plug-in multi-way connector into each of the three sockets on
the underside of the drive. These connectors are keyed to ensure
correct fitting.
2.
Loosen the screw for each of the ground terminals of the 4-way
connectors.
3.
Fit the two tongues of the ground bracket in the ground terminals of
the 4-way connectors and pass the hole in the upright section (as
viewed in the diagram) of the ground bracket over the ground stud in
the lower mounting bracket.
4.
Fit onto the ground stud the M5 plain washer, spring washer and nut
supplied with the drive. While tightening the nut to the specified
torque, ensure the tongues on the ground bracket remain fully
inserted in the terminals.
5.
Tighten the screws in the two ground terminals to the specified
torque.
6.
Strip back the insulating sheath on the shielded cables to expose at
least 12mm (0.472in) of shield and 30mm (1.181in) of inner
conductors.
7.
Fit a hose clip over each cable shield to clamp it to the ground
bracket; for reliable contact, it may be necessary to wrap copper foil
around the shield.
8.
Connect the ground wire of the motor cable to the ground bracket
using the related hole at the position shown. This applies whether
the ground wire is inside or outside the cable.
When an external braking resistor is used, use the same
arrangement for the braking resistor cable.
9.
Use a cable tie to secure the AC supply wiring to the ground bracket.
10. If an auxiliary back-up supply is to be connected, ensure its output is
isolated and it is connected only to terminals H and
−
; see Types of
back-up supplies in Chapter 2 Connecting the drive in the User
Guide.
Ground bracket must
be fitted due to risk
of electric shock
5
0V
20mm (0.787in)
12mm (0.472in)
WARNING
Live circuit dedicated
isolated supply is
required.
WARNING
Figure 2-11
Locations of the power connections and correct fitting of the ground bracket
WARNING
