VEGA D98 Pressure transmitter - Manual (Page 8)

8 Pressure transmitter D98
Electrical connection
4 Electrical connection
4.1 Connection instructions
The electronics in the pressure transmitter
requires a supply voltage of 12 … 36 V DC.
The electronics is designed in two-wire tech-
nology i.e. supply voltage (DC) and measur-
ing signal are led via the same two-wire
connection cable to the terminals. The supply
voltage is provided by an external power
supply unit.
Please note that the external power supply
according to DIN VDE 0106, part 101 must
be reliably separated from the mains circuits.
Note the following instructions for electrical
connection:
- Connection must be made according to
country-specific installation standards (e.g.
in Germany acc. to the VDE regulations).
- The terminal voltage should not exceed 36
V to avoid damage to the electronics.
- The electrical connection is provided with
polarity reversal.
- The wiring between pressure transmitter
and power supply can be carried out with
standard two-core cable.
- Screened cable is recommended in case
of strong electromagnetic interference.
Install the screening on one side of the
sensor.
- In case of overvoltage, we recommend
using a pressure transmitter with inte-
grated overvoltage protection or installing
VEGA overvoltage arresters.
- A seal must be used which correctly fits
the cable in the cable entry.
Connection cable
Please make sure that the connection cables
are specified for the anticipated operating
temperatures in your plant. The cable must
have an outer diameter of 5 ... 9 mm, other-
wise the sealing effect of the cable entry
cannot be guaranteed.