Kobold DOG Series, Operating Instructions Manual

Page: 12 / 58

DOG
page 12 DOG K11/0422
9. Electrical connections
9.1 General

Install the measuring sensor near the transducer (max. 100 m cable length,
depending on the electrical interference zone).

The measuring cable must be laid well away from strong sources of electrical
interference and not parallel to power cables.

The measuring cable of several DOG-… must not be laid over long distances
next to one another or bundled together.

The electronics of the DOG-… must be installed outside of the Ex-zone.

Lay the electrical cabling according to the following wiring diagram.

Each transducer is matched specifically to the respective measuring sensor
and must not be swapped over.

The pipelines and the flange housing must be grounded.
9.2 Measuring cable in Ex areas
An Ölflex EP (without shield) or Ölflex EBCY (with shield) may be used as measuring
cable between the sensor and transmitter. Alternatively, a cable with comparable
properties may be used.
Ölflex EB Li=0.65 mH/km Cisy=110 nF/km
Ölflex EBCY Li=0.65 mH/km Cisy=135 nF/km Ciasy=185 NF/km
The length of the cable may not exceed 100 m. The maximum permitted cable
inductance is Limax=65 µH and the maximum capacitance Cimax=32 nF.
9.3 Connection to the measuring sensor
To connect the measuring cable, first unscrew the lid of the connection box and
remove the lid. Feed the cable through the cable gland and connect it to the
connecting terminal (independent of polarity). When using a shielded cable, the
shield must be connected to the grounding screw.