WARNING
DISCHARGE TIME!
The DC link capacitors of the servomotors remain charged
for some time after the mains supply is switched off at the
power supply module.
To avoid electrical shock, fully disconnect the power
supply module from the mains before carrying out
maintenance. The DC links of the individual ISD
servomotors are connected in parallel when they are
connected as a group, which increases the discharge time.
Wait for at least the time listed below before carrying out
maintenance work:
Number
Minimum waiting time
(discharge time)
1-60 servomotors
10 minutes
Note: High voltage may be present even if the LED on the ISD
connection box is not lit!
Table 10.2 Discharge Time
10.3.1 Cable Replacement
Hybrid cable replacement is necessary when the rated
number of bending cycles has been reached or the cable is
damaged. You may replace the cable yourself. Danfoss
supplies an installation tool for this purpose with the
servomotor.
CAUTION
Never disconnect or connect the cable from the
servomotor with the supply voltage connected. Doing so
will damage the electronic circuitry. Observe the discharge
time for the DC link capacitors.
CAUTION
Do not forcefully connect or fit the connectors. Incorrect
connection will cause permanent damage to the
connector.
10.3.1.1 Feed Cable Replacement
Proceed as follows:
Disconnecting cables
1.
Disconnect the power supply module from its
power source (mains network).
2.
Wait for the necessary discharge time to elapse.
3.
Loosen the feed cable connector on the
connection box.
4.
Loosen the threaded ring of the connector on the
servomotor. Use the Danfoss installation tool for
this purpose.
5.
Disconnect the feed cable (and the sensor cable if
present) from the servomotor.
Cable replacement
Replace the feed cable with a cable of identical type and
length (see the
VLT
®
ISD 410 Design Guide, MG75I
for part
numbers).
Connecting cables
1.
Connect the female connector of the feed cable
to the male connector of the first servomotor.
2.
Turn the threaded rings hand tight.
3.
Check the cabling again for sufficient slack.
4.
Using the Danfoss installation tool, tighten the
threaded rings of the connectors.
Maintenance and Repair
VLT
®
ISD 410 Servomotor Operating Instructions
34
MG75D102 - VLT
®
is a registered Danfoss trademark
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