Cable Entries; Cable Specification; Potential Equalization - Endress+Hauser Proline Promag 53 Safety Instructions

Proline Promag 53

Cable entries

Cable specification

Potential equalization

Endress+Hauser
• m for connection compartment (Ex d version): power supply cable and cable of the communication circuit
 Choice of thread for cable entries M20 × 1.5, ½" NPT or G ½".
Make sure that the Ex d cable glands/entries are secured to prevent working loose and that the seals are
installed immediately adjacent to the housing.
• m for connection compartment (Ex e version): power supply cable and cable of the communication circuit
 Choice of cable gland M20 × 1.5 or thread for cable entries ½" NPT or G ½". 
The cables must be installed such that they are fixed in place. Adequate strain relief must be ensured.
• n for remote version connecting cable:
 Choice of cable gland M20 × 1.5 or thread for cable entries ½" NPT or G ½"
#
Warning!
The leak-tight of the cable glands and cable entries is to ensure.
You can find information about the cable specification in the associated Operating Instructions.
• The transmitter (compact and remote version) is to be securely connected to the potential equalization
system using the screw terminal on the outside of the transmitter housing. Alternatively, the transmitter of
the compact version as of serial number 4Axxxxxx000 can be connected to the potential equalization
system via the pipeline if a ground connection via the pipeline according to regulations can be assured.
• When using the remote version, the connection housing of the sensor must be grounded via the external
screw terminal. Alternatively, the sensor can be integrated into the potential equalization via the pipeline
as long as the pipeline provides a ground connection conforming to regulations.
!
Note!
Further information about potential equalization, shielding and grounding can be found in the associated
Operating Instructions.
Potential equalization with shield grounded at both sides for fieldbus version
3.1
R
C
3.2
+5 V
R
R
R
GND
Fig. 5: Example for connecting potential equalization lines
1 Distributor/T-Box
2 Bus devices for potentially explosive atmospheres
3.1 Bus terminator PROFIBUS PA and FOUNDATION Fieldbus
3.2 Bus terminator PROFIBUS DP and Modbus
4 Bus supply unit or automation system
4a Potential equalization line is fed out into the safe area
!
Note!
The length of the spur must be observed.
1 1
2
NEPSI Zone 1, Zone 21
E X E X
2
4a
0
4
A0005215
9