Operating Instructions ET-xx8 / MT-xx8
Mounting and installation
Page 42 of 84
R. STAHL HMI Systems GmbH / OI_ET_MT-xx8_en_V_01_02_03.docx / 10.03.2021
Close unused openings with a blind plug.
Mount cable glands with conical threads with at least three thread turns.
Cable glands with parallel threads must have the following characteristics:
o
Tolerance class 6H or higher
o
additional seal
8.5.7
Cable glands
In their factory state, the devices are equipped with cable glands or screw plugs. They have been
chosen to comply with all relevant certifications of the device. The device's ex-relevant markings
also cover the bushings, which are not necessarily separately marked when included in the
delivery.
Unused cable glands must be sealed with certified screw plugs.
Close any open enclosure holes without cable glands with a certified screw plug. Such
certified screw plugs must be approved for the following areas or higher:
o
Certified zone
o
Permitted temperature range
o
Country approval (e.g. ATEX for Europe) of the device
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.
Use cable glands with cap nut and without strain relief clamp for permanently installed
cables and electrical lines only.
Ensure required strain relief is in place.
Observe recommended tightening torques. Too low or too high tightening torques might
have a negative impact on the type of protection, sealing or strain relief.
Before commissioning, check any screws that are already mounted and tighten them if
necessary.
Tightening torque
Cable glands
Depending on cables used:
Individually determine and apply required tightening
torques.
Cable glands (installed ex-
factory)
In the case of factory-supplied systems, all components are
installed correctly and in accordance with applicable standards.
