Safety
Operating Instructions ET-xx8 / MT-xx8
R. STAHL HMI Systems GmbH / OI_ET_MT-xx8_en_V_01_02_03.docx / 10.03.2021
Page 19 of 84
Improper mounting, installation, commissioning, maintenance or cleaning
Basic work such as installation, commissioning, maintenance or cleaning of the device must
always be performed in accordance with the applicable national regulations of the country of use
and only by qualified persons. Otherwise, the explosion protection may be rendered ineffective.
This may result in explosions causing serious or even fatal injury.
Have the assembly, installation, commissioning and maintenance work performed by
qualified and authorised persons only (see chapter
Prior to commissioning, check the device is mounted correctly (see chapter
).
Electrical circuits with Ex i type of protection may no longer be operated as electrical circuits
with this type of protection after being operated with electrical circuits with other types of
protection.
Even when used in Zones 2 and 22, intrinsically safe devices of Zones 0, 1, 20 and 21 can
be connected to the intrinsically safe signal circuits.
Only connect the device to equipment which does not carry voltages higher than 250 VAC
(50 - 60 Hz).
Connect Ex i devices only to intrinsically safe terminals.
In hazardous areas, always switch the electrical circuits and devices to a de-energised state
before disconnecting or connecting and when mounting / dismounting.
Do not change or modify the device.
Any repair on the device is to be performed by R. STAHL only.
Gently clean the device with a damp cloth only
– do not use scratching, abrasive or
aggressive cleaning agents or solutions.
Never clean the device with a strong water jet, such as a pressure washer !
3.5.2
Risk of injury
Falling devices or components
The heavy device or components can fall during transport and mounting, causing severe injury to
persons in the form of bruises and contusions.
Use transporting and lifting equipment suitable for the size and weight of the device when
transporting and mounting it.
Observe the weight and the maximum load-bearing capacity of the device; see
specifications on the shipping label or on the packaging.
Use suitable mounting materials for mounting.
Electric shock
During operation and maintenance, high voltage is at times applied to the device. Because of this,
the device must be de-energised during installation. Persons coming into contact with electrical
lines carrying excessively high voltage can suffer severe electric shocks and, consequently,
injuries.
Only connect electrical circuits to suitable terminals.