Operating instructions
Dcontrol
Date 0730
TBL02_54-GB 0730
Part-No. 00153238-GB
Page 8 / 28
4. Installation
4.1 Mounting
•
Assemble the device on a clean and stable base. Do not distort during assembly! Use the appropriate mounting
devices for proper installation of the unit!
•
Do not mount equipment on vibrating base!
•
Use the appropriate fixing equipment. The plastic washers must be installed between the screw heads and the
housing for models with mounting holes on the inside of the housing!
•
Install the device away from transport routes. However, ensure however that the device is still easily accessible!
•
Depending on the housing model cut off necessary cable inlets respectively to the cable diameter. Or alternative use
cable inlet for cable glands. Metal sheet housings are supplied with stoppers. Any cable ducts openings not used
must be sealed!
•
Protect the device from direct exposure to sunlight!
•
The device is designed for vertical installation (cable inlet down). A horizontal or reclined installation is only
permissible after consultation with the manufacturer.
•
Be sure to observe proper heat dissipation (
)
Technical data, “heat dissipation”)
4.2 Minimum space requirement
In order to ensure sufficient ventilation of the device, clearance on all sides of at
least 50 mm has to be maintained to the housing walls, switch cabinet doors,
wiring ducts, etc. The same clearance applies to the installation of several
devices next to each other (
)
illustration).
When installing several devices on top of each other, the danger of reciprocal
heating exists. This layout is only then permissible when the air suctioned from
the upper unit does not become warmer than the permissible ambient
temperature (
)
Technical data). I.e., a correspondingly larger clearance or
thermal shielding is required.
4.3 Outdoor installation
Outdoor installation is possible up to -20°C when the controller supply is not switched off.
Installation must be protected from the effects of weather as much as possible, including protection from direct sunlight!
4.4 Installation location for agriculture
In order to avoid damage caused by ammoniac vapours (NH
3
), the controller shall not be installed in the stable, but
rather in an outhouse wherever possible.
4.5 Temperature influences during commissioning
Avoid condensation in the controller and hence functional faults attributable to condensation by storing the controller at
room temperature!
4.6 Residual-current-operated protective device
Owing to possible leakage currents occurring when the device is switched on, it is advisable to use short-time-delayed
current-operated circuit-breakers. This prevents any triggering by mistake.
Plants without neutral conductor connection
)
Electrical connections: Mains connection.
4.7 Potential at control voltage connections
The control voltage connections (<50 V) relate to the joint GND potential (Exception: Relay contacts are potential free).
There is a potential separation between the control voltage connections and the earthed conductor.
It must be ensured that the maximum external voltage at the control voltage connections cannot exceed 50V (between
„GND“ terminals and „PE“ earthed conductor).
If necessary, a connection to the earthed conductor potential can be established, install bridge between “GND“ terminal
and the “PE“ connection (terminal for screening )
4.8 Employment in the IT Net
In the IT net the neutral point of voltage supply is not grounded; in the case of a short-circuit between a phase (e.g. "L1")
and protective grounding "PE" becomes the protective grounding potential = "L1".
In order to ensure a trouble free operation in this case,
1. the "GND" potential of the control ports have to be connected with the protective grounding potential,
2. the "N" lead must not be connected.
As consequence of the connection between "GND" potential of the control ports with protective grounding potential, the
following must be considered (exception relay contacts floating):
1. Only with lines for mains voltage and environment are suitable attach.
2. Attach over suitable isolating amplifiers.
min. 50 mm
