AEG THYRO-A, Operating Instructions Manual

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cation conditions if necessary (e.g. operating mode, control mode,
limitations, monitoring, control characteristic curves, actual value
output, fault messages etc.)
NOTE
Connecting the control signals
The following control signals are absolutely necessary
for operating the devices:
- Setpoint (terminal X2.4 or via bus option)
- Pulse blocking (to ground, on terminal X2.1, X2.2; bridge present)
> Use shielded control conductors to connect the control signals.
If the pulse blocking bridge is not connected, the device is blocked
and is not operating. Communication is still possible via the interface
(see page 63, Connecting pulse blocking).
2.6.3 Maintenance, service, faults
In order to avoid personal and material damages, the user must ob-
serve the following:
• Before all work:
> Disconnect the device from all external voltage sources.
> Secure the device against accidentally being switched back on.
> Use suitable measuring instruments and check that there is no vol-
tage present.
> Ground and short circuit the device.
> Provide protection by covers or barriers for any neighbouring live
parts.
• The device may only be serviced and repaired by trained electro-
technical personnel.
• There is a risk of damage when carrying out repair work on the
power unit.
Various components of the power unit are screwed tight with a pre-
cise torque.
> Repairs to power units have to be carried out by AEG Power
Solutions GmbH!
• see also contact on page 6