Siemens 6SL38503UM114PA0Z, Operating Instructions & Installation Instructions

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9.7.8.2 Replacing thyristor electronics
DANGER
Danger when not complying with the five safety rules
Non-observance of the five safety rules can cause death or serious injury. Serious material
damage can also result.
● Observe the five safety rules.
● Work must only be performed on adequately grounded power circuitry.
Two plug connectors are available on the thyristor electronics for connection to the thyristor and
the external circuitry. The mating connector is integrated at the mounting position of the
thyristor electronics.
If the thyristor electronics have to be replaced, proceed as follows:
Disconnecting the cables
To disconnect the cables, proceed as follows:
1. If there are no core end markings, label the two fiber-optic cables and the connected cables.
2. Remove all connecting leads.
3. Detach the two fiber-optic cables from the opto-receiver and opto-transmitter modules.
4. Pull out the fiber-optic cables.
Changing the thyristor electronics
To change the thyristor electronics, proceed as follows:
1. Take out the thyristor electronics. To do this, loosen the four screws with which the thyristor
electronics are fixed to the carrier frame.
2. Send the defective thyristor electronics back. Refer to Notes on sending back (Page 125) to
help you.
3. Install the new thyristor electronics. Tighten the screws with a tightening torque of 1.8 Nm.
Connecting cables
To connect the cables, proceed as follows:
1. Reconnect the fiber-optic cables to the opto-transmitter and opto-receiver in accordance
with the markings. Carefully hand-tighten the knurled nut.
2. Check the correct insertion depth of the fiber-optic cables with the aid of the marking rings.
If the white colored ring on the fiber-optic cable is flush with the shaft end of the plug case,
the fiber-optic cables are correctly inserted.
3. Reinsert the connecting leads into the thyristor electronics.
4. Check that everything is correctly connected and that the cables are correctly inserted.
Maintenance
9.7 Repairs
SINAMICS GL150 6SL38503UM114PA0Z
124
Operating Instructions Rev.201910301420 MUSTER