Installation
Operating Instructions MT-xx6-A
R. STAHL HMI Systems GmbH / OI_MT_xx6_A_en_V_03_00_26.docx / 03.11.2020
Page 27 of 60
11 Installation
11.1 General information
Electrical plants are subject to certain regulations concerning
installation and operation (e.g. RL 1999/92/EC, RL 2014/34/EU and
IEC/EN 60079-14).
It is the responsibility of the operators of electrical installations in
hazardous environments to ensure that the equipment is kept in
proper condition, is operated according to instructions and that
maintenance and repairs are carried out.
11.2 MT-xx6-A-*
The HMI devices may be installed in zones 2 or 22. The circuits must be installed
according to applicable regulations.
The PE connection part of the HMI device located at the back of the housing is internally
connected with the GND supply cable (X1 pins 3 and 4).
The HMI devices can be mounted and operated in any position. Sufficient air circulation
must be ensured, however, so that the maximum operating temperature is not exceeded.
The HMI device's front should be protected by a canopy against permanent exposure to
UV light. This increases the front membrane's lifespan. The canopy
MUST NOT
be too
close to the front plate and sufficient air circulation must be ensured.
The MT-4x6-A-* and MT-5x6-A-* devices may be operated at +55 °C [+131 °F]
ONLY
FOR SHORT PERIODS
(maximum 5 h) at a time.
11.2.1
Cable glands
The HMI devices of the EAGLE device platform (MT-xx6-A) are factory-fitted with cable glands
of the type STAHL 8161/* (Ex i - connections) and of the type HSK-M-Ex (Ex nA 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.
NOTICE
