Elgas DATCOM, Operating Instructions Manual

Page: 66 / 228

5
Installation and Commissioning
64
5.6 Electrical Connection
The text below describes electrical connection of the corrector with other devices. For the
described connections to work properly, the device should also be set correctly up. The device
can be set up either using the service software [42], [43] or from the device keypad (see Section
6.7).
5.6.1 Connecting Cables
Always use shielded cables complying with the standard [10] to connect the
device to other devices.
On the device side, the shields of all the connected cables must be
connected to the metal body of the cable gland according to Fig. 20 .
When installing the device and connecting the cable shields, make sure that
ground loops are not created.
All the cable glands in the device are electrically interconnected, the shields of all
the cables entering the device are therefore connected at this point. This ensures
high resistance to electromagnetic interference.
The following applies:
 For the digital pressure transducer (i.e. built into body of the device housing), the
metal housing of the transducer is conductively connected with the metal cable
glands of the device, i.e. with the shielding of the cables fixed in the cable glands of
the device.

The temperature transducer and the external digital pressure transducer (if
installed) are connected to the device with a shielded cable whose shield is
connected to the metal body of the cable gland.
 The metal shank of the temperature transducer is insulated from the shield of the
cable and all other parts of the device.

The metal body of the external pressure transducer is connected to the cable
shield.
Fig. 20 Connecting the cable shields in the cable glands