Electrical Connection; Electrical Connection Recommendations - bürkert 8035 Bedienungsanleitung

3 INSTALLATION

3.3 Electrical Connection

3.3.1 Electrical connection recommendations

Do not open and wire the device with the power supply connected.
It is advisable to put security devices on :
Power supply: Fuse (300 mA) and an interrupter
Relay: 3A max. fuse and circuit breaker (depending on application).
Use shielded cables with a temperature limit of 80°C minimum.
For normal operating conditions the measuring signal can be transmitted by a
shielded cable of 0.75 mm
The line must not be installed in combination with carrying lines with a higher
voltage or frequency.
If a combined installation cannot be avoided, a minimum space of 30 cm should be
respected.
The cable diameter must be between 6 and 12 mm;
If 2 cables are needed, use the supplied multiway seal and 4-mm diameter cables.
The 12-30 VDC power supply must be filetered and regulated.
Ensure the equipotentiality of the installation (power supply - controller - medium):
- The various earth spots in the installation have to be connected together to
eliminate the potential differences that may occur between different earthes.
- Observe faultless grounding of the cable shielding.
- Earth the negative terminal of the power supply to suppress the common mode
currents. If direct earthing is not possible insert a 100 nF / 50 V-condensator
between the negative terminal and the earth.
Special attention has to be paid if the device is installed on plastic pipes because
there is no direct earthing possible.
Proper earthing is performed by earthing together the metallic devices such as pumps
or valves, that are as close as possible to the controller.
BATCH CONTROLLER 8035
2
cross section.
E-9-