Electrical Installation - Dräger PIR 3000 Instructions For Use Manual

Installing the Gas Transmitter

Electrical Installation

The entire wiring must correspond with applicable local regulations concerning the installation of electrical devices in potentially
explosive atmospheres. In case of doubt, consult the responsible authorities before installing the device.
We recommend a three-core, screened connection cable (mesh wire shield with a shielding factor of ≥ 80 %).
Attention:
Earth leakages on two phases can cause EMC problems. To avoid these problems, the cable screen may only be con-
nected to earth potential on one side (either at the central unit or at the gas transmitter). In most cases, connecting the
cable screen to the PE terminal of the terminal box has proven to work better than connecting it to the central device.
●
If the corresponding connection is available:
Electrically connect the terminal box to earth.
●
For installation in protection pipe: cast protection pipe seals and allow to harden.
●
Do not connect gas transmitter and power supply before the wiring has been installed and tested.
Connection Diagram:
+
10 to 30 V DC
at gas transmitter
Colour code of connecting terminals and/or leads at the gas transmitter:
1 = black = – (common reference potential)
2 = brown = signal output 4 to 20 mA
3 = red = + (10 to 30 V DC)
8
4 to20 mA
R
I
U
red
brown
black