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Operating Manual U 100-C Controller
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2.4
Potential equalisation / earthing
The subscriber network must be earthed correctly in accordance with EN 50083-1, and must
remain earthed even when the device is removed.
The potential equalisation on the U 100 is effected via the fastening plates of the device, or
via the earthing connection on the back of the device. Devices within hand's reached must be
incorporated into the potential equalisation among one another.
It is not permitted to operate the device without an earth conductor, device earthing or device
potential equalisation!
2.5 Maintenance and repair
Disconnect both mains plugs before opening the device!
The device must not be opened other than for repair purposes. In general, power units must
not be opened. Repairs may only be carried out at the plant or at workshops, or by persons,
authorised by ASTRO Strobel Kommunikationssysteme GmbH.
Read carefully: DIN VDE 0701- 0702, Repairs
Note: The device must not be opened by the user!
2.6 Service tasks
The following tasks, in which screw connections have to be opened, can be performed by appro-
priately instructed service personnel: Removal and installation of signal converters (e.g. U 114)
and power units, also when the U 100 is in operating mode.
Replacing power units
After the screws on the cover of the power unit chamber (ASTRO logo) are removed,
the power units can be pulled out by hand, forwards along the mounting panel.
When power units are being installed, there should be no contact with the ventilator or the fan
grid,
and only the mounting panel attached to the power unit should be used.
When the tasks are complete, the cover of the power unit chamber must be replaced;
continuous operation of the device is not permitted without this cover.
Note: Do not put your hand or any objects into the power unit chamber.
The U 100 must only be operated with the original power unit(s)!
Replacing converter modules:
Converter modules can be pulled outwards after the safety screw on the front panel
has been unscrewed.
2.7 Technical data for the mains supply (U 100 SNT - 230 V version)
Mains voltage:
100 – 240 V
Mains frequency:
50 / 60 Hz
Current consumption:
1.4 – 0.7 A per power unit
Protection class according to EN 60529:
IP 20
Permitted ambient temperature range:
0 … 45 °C
Secondary fuse in U100-230:
T3,15A L 250 V IEC 60127-2/3
Secondary fuses in U114:
SMD, various values