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Liquiphant M/S (HT), FEL 50 A PROFIBUS PA
"
!
Endress+Hauser
4.2
Connection of the limit switch
4.2.1
Connection with cable gland
Procedure:
1. Unscrew connection compartment cover from transmitter housing.
2. Run the PROFIBUS cable through the appropriate cable entries.
3. Connect the cables in accordance with the wiring diagram: see Fig. 5 and Fig. 6
Caution!
– The PROFIBUS cable can be damaged!
In systems without additional potential matching systems, line-frequency
equalising currents may occur which damage the cable and/or the screen,
should the cable screening be grounded at several points.
In such cases the shielding of the cable is to be grounded on only one side,
i.e. it must not be connected to the ground terminal of the housing. The shield
that is not connected should be insulated!
– We recommend that the PROFIBUS not be looped using conventional cable
glands. If you later replace even just one measuring device, the bus
communication will have to be interrupted.
Note!
– The terminals for the PROFIBUS connection (1/2) possess integrated reverse
polarity protection. This ensures correct signal transmission via the field bus even
if lines are confused.
– Conductor cross-section: maximum 2.5 mm
– Observe the system's grounding concept.
– Select the Bus address using the miniature switch.
4.
Screw the connection compartment cover back onto the housing.
FEL 50 A
max. 2.5 mm²
(max. AWG 14)
max. 4 mm²
(max. AWG 12)
Fig. 5
Connection of transmitter with cable gland
2
M 20 x 1.5
ø5 ... 9 mm
(ø0.2 ... 0.35 in)
4 Wiring
3 mm
(1/8 in)
11
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