Siemens SIMOTICS XP 1MD4, Operating Instructions And Installation Instructions, Page: 58 / 128

Nominal size Cable gland for Ex e II
TypeHSK-M
Cable gland for Ex e / Ex d IIC
Type ADE 1F, ADE 4F R... / B...
Union nut Connection thread Union nut / connection
thread
Union nut / connection
thread
M20 x 1.5 5 7 20 23
M25 x 1.5 7 10 30 29
M32 x 1.5 7 10 55 33
M40 x 1.5 7 10 75 41
M50 x 1.5 7 10 100 50
M63 x 1.5 7 10 135 75
M75 x 1.5 - - 175 100
6.2.12 Connecting aluminum conductors
If you are using aluminum conductors, comply in addition with the following:
● Use only cable lugs that are suitable for connecting aluminum conductors.
● Immediately before inserting the aluminum conductor, remove the oxide layer from the
contact areas on the conductor and/or the mating piece, by brushing or filing.
● Then grease the contact areas immediately using neutral vaseline in order to avoid re-
oxidation.
NOTICE
Aluminum flow due to contact pressure
Aluminum flows following installation due to the contact pressure. The connection with the
clamping nuts can loosen as a result. The contact resistance would increase and the
current-carrying impeded; as a consequence the terminal box and the surrounding
components could burn. This could result in material damage to the machine or even in
total failure, which could in turn lead to indirect material damage to the system.
Retighten the clamping nuts after approximately 24 hours and then again after
approximately four weeks. Make sure that the terminals are de-energized before you
tighten the nuts.
6.2.13 O-ring seal
If O-ring seals are present, you should check that they are in perfect condition and that the O-
ring seals are properly seated in the grooves between the components. Replace any damaged
O-ring seals.
O-ring seals can be present on the following components, for instance:
● Tapers
● Cable glands
● Bearing seals
Electrical connection
6.2 Connecting
SIMOTICS XP 1MD4/1MD5
58
Operating Instructions 05/2015