Electrical Connections; Cable Glands And Terminals - Samson Media 7 Mounting And Operating Instructions

5.4 Electrical connections

DANGER
!
Risk of fatal injury due to the formation of
an explosive atmosphere.
For mounting and electrical installation in
hazardous areas, observe the explosion
protection approvals as well as the relevant
electrotechnical regulations and the accident
prevention regulations that apply in the
country of use. EN 60079-14 applies in
Europe.
WARNING
!
Incorrect electrical connection will render the
explosion protection unsafe.
− Only operate the device with an
intrinsically safe power supply while
observing the maximum parameters for
electrical connection specified in the
explosion protection certificate.
− Adhere to the terminal assignment.
− Do not undo the enameled screws.
NOTICE
!
Risk of damage to the differential pressure
meter due to the maximum permissible
values specified in the EC type examination
certificate being exceeded.
Do not exceed the maximum permissible
values (U or U , l or I
i 0 i
and L or L ) when interconnecting
i 0
intrinsically safe electrical equipment.
Otherwise, the device is no longer protected
against reverse polarity.
EB 9510 EN
, P or P , C or C
0 i 0 i 0
Selecting cables and wires
Î Observe the relevant clauses of
EN 60079-14 for installation of intrinsi-
cally safe circuits.
Î Use cable glands with M16x1.5 thread
whose diameter and shape have been
approved by the manufacturer for the
cable used.
Î Seal cable entries left unused with plugs.
Î The cable entry used must correspond
with the ambient temperature range and
have the specified IP rating (see technical
data in section 3.6).
5.4.1 Cable glands and termi-
nals
The housing of the Media 7 Differential
Pressure Meter has five threaded boreholes,
which can be fitted with cable glands as
required.
Î The cable gland version depends on the
ambient temperature range. See techni-
cal data in section 3.6 on page 24.
Î The cage clamp terminals hold wire
cross-sections of 0.2 to 2.5 mm².
Mounting and start-up
35