Wiring
Proline Promag 55 FOUNDATION Fieldbus
44
Hauser
4.4
Connecting the measuring unit
Field instruments can be connected to the FOUNDATION Fieldbus in two ways:
• Connection via conventional cable gland
• Connection using prefabricated fieldbus connector (option)
4.4.1
Connecting the transmitter
#
Warning!
• Risk of electric shock. Switch off the power supply before opening the device. Do not install or
wire the device while it is connected to the power supply. Failure to comply with this precaution
can result in irreparable damage to the electronics.
• Risk of electric shock. Connect the protective earth to the ground terminal on the housing before
the power supply is applied (e.g. galvanically isolated power supply SELV or PELV).
• Compare the specifications on the nameplate with the local voltage supply and frequency. Also
observe the national regulations governing the installation of electrical equipment.
Procedure (
1.
Unscrew the connection compartment cover (a) from the transmitter housing.
2.
Feed the power supply cable (b) and fieldbus cable (d) through the appropriate cable entries.
!
Note!
The device can also be supplied with the option of a ready-mounted fieldbus connector. More
information on this can be found on
46.
3.
Perform wiring in accordance with the respective terminal assignment and the associated
wiring diagram.
"
Caution!
– Risk of damage to the fieldbus cable!
Observe the information about shielding and grounding the fieldbus cable
– We recommend that the fieldbus cable not be looped using conventional cable glands. If, at
a later stage, you replace even just one measuring device, the bus communication will have
to be interrupted.
!
Note!
– The terminals for the fieldbus connection (26/27) have integrated reverse polarity
protection. This ensures correct signal transmission via the fieldbus even if lines are
transposed.
– Conductor cross-section: max. 2.5 mm
2
– Between the stripped fieldbus cable shielding and the ground terminal (e), the cable
shielding should not exceed a length of 5 mm.
4.
Screw the cover of the connection compartment (a) back onto the transmitter housing.
Содержание Proline Promag 55
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