Connection To Regard Control Unit - Dräger Polytron SE Ex PR M1 DQ Gebrauchsanweisung

– Installation
The housing should be installed using the two outer flaps. The housing is
not permitted to be supported by a cable entry under any circumstances.
The silicone seal should be fitted between the housing and the cover. It is
important that the cover is fitted securely to the housing body. All screws for
securing the cover should be tightened at a torque of 3.5 Nm.
– Cable entries
These should be selected in accordance with the details on the approval
sticker on the housing cover.
– "T" values
The housing may be approved for installation under different ambient
temperatures. Compliance with the marking on the approval sticker on the
housing cover must be ensured in terms of the ambient temperatures at
which the housing is installed.
– Earthing
The housing is fitted with an internal and external hexagon M 6 earth
connection made from brass. A suitable ring tab should be used to secure
the earthing conductor.
– Ambient conditions
The terminal box is made of cast iron and is equipped with stainless steel
mounting screws for the cover, a silicone gasket and brass earthing screws.
Material compatibility of these parts with corrosive substances with which
the housing may come into contact must be taken into account. The housing
is suitable for use under normal industrial conditions and should not be
installed in areas where very high vibrations could occur.
– Misuse
The housing should only be used as an electrical housing. This is not a
housing with pressure-resistant enclosure of protection type "d".
– Tools
10 mm socket wrench for cover fastening screws, internal and external
earthing
4.2.3

Connection to REGARD control unit

– The line resistance per wire is not permitted to exceed 6 Ohms.
This results in the following maximum distances for the different wire cross-
sections:
Wire cross-section
1.0 mm
Max. line length 250 m
– Carefully connect all measuring line connections. Select the measuring lines
according to the installation instructions for the operating temperature range
in question.
– The metallic housing of the Polytron SE Ex HT M DQ and Polytron SE Ex
PR NPT1 DQ sensing heads must be earthed on-site via their external PE
terminals. To avoid double earthing, the cable shielding should therefore
only be placed on the inner PE terminal of the housing and not to the earth
of the control unit in addition.
Polytron SE Ex PR ... DQ
BR
Y
BLK
Installation & commissioning
2 2
1.5 mm 2.5 mm
400 m 700 m
REGARD-1
7 8 9
2