Operating Instructions ET-xx6-A
Installation
Page 26 of 60
R. STAHL HMI Systems GmbH / OI_ET_xx6_A_en_V_03_00_36.docx / 03.05.2021
11.2.1
HMI device Installation in housings type of protection "e" or "t"
If the HMI devices ET-xx6-A-* are mounted inside a cut out of a suitable housing of protection
type Ex e or Ex t, its mechanical protection regarding impact and IP code protection up to IP65 is
maintained even after the device has been installed. The internal separation requirements and
the temperature assessment of the Ex e housing must be in accordance with the applicable
standards. The clearance of HMI device terminals to other bare conducting parts (excepting
ground) inside the Ex e housing shall be at least 50 mm [0.16 ft].
11.2.2
Cable glands
The HMI devices of the EAGLE device platform (ET-xx6-A) are factory-fitted with cable glands of
the type STAHL 8161/* (Ex i - connections) and of the type HSK-M-Ex (Ex e connections). These
are selected so that they comply with all relevant approvals for the device. The Ex-relevant
markings on the device also contain the bushings and are not necessarily specially marked when
the device is shipped from the factory. The following must be observed:
Unused cable glands must be closed with certified screw plugs or stopping plugs.
The tightening torques for the cable glands may vary depending on the cables and wires
used. The users have to determine and apply the required torques themselves.
In the case of ex-factory systems, all components are installed correctly and in accordance
with applicable standards. Since storage or temperature etc. can have an impact on the
cables and cable glands, the pre-installed screw connections must be checked and possibly
tightened before commissioning.
If they are too loose or too tight, the type of protection, sealing or strain relief might be
negatively impacted.
Cable glands with cap nut and without strain relief clamp should only be used for
permanently installed cables and electrical lines. Installation of the required strain relief is
the responsibility of the system set-up engineer.
Alternative, similar and certified cable glands may be used provided they have an equal or higher
area of certification (zone) and permitted temperature range, and the same country approval (e.g.
ATEX for Europe) as the HMI device.
Open enclosure holes without cable glands are not permitted and must be closed with a certified
screw plug. This certified screw plug must have an equal or higher area of certification (zone) and
permitted temperature range, and the same country approval (e.g. ATEX for Europe) as the HMI
device.
