Lumel RE72 User Manual

10
10
current
transformer
6
5
+
-
Fig. 9. Current transformer input
Fig. 10. RS-485 Interface
8
7
RS-485
B
A
(-)
(+)
Fig. 11. Supply of 24V transducers
4.3. Installation Recommendations
In order to obtain a full fastness against electromagnetic noise, it is
recommended to observe following principles:
- do not supply the controller from the network in the proximity
of devices generating high pulse noise and do not apply common
earth circuits,
- apply network fi lters,
- wires leading measuring signals should be twisted in pairs,
and for resistance sensors in 3-wire connection, twisted of wires
of the same length, cross-section and resistance, and led in a shield
as above,
- all shields should be one-side earthed or connected to the protection
wire, the nearest possible to the controller,
- apply the general principle, that wires leading different signals should
be led at the maximal distance between them ( no less than 30 cm),
and the crossing of these groups of wires made at right angle (90º).

Lumel RE72 Specifications

General

Brand	Lumel
Model	RE72
Category	Controller
Language	English