Endress+Hauser Proline Prowirl 72 - Fieldbus Connector

Proline Prowirl 72 FOUNDATION Fieldbus 4 Wiring
Endress + Hauser 27
4.3.2 Fieldbus connector
The connection technology of FOUNDATION Fieldbus allows measuring devices to be connected
to the fieldbus via uniform mechanical connections such as T-boxes, distribution modules, etc.
This connection technology using prefabricated distribution modules and plug-in connectors offers
substantial advantages over conventional wiring:
• Field devices can be removed, replaced or added at any time during normal operation.
Communication is not interrupted.
• Installation and maintenance are significantly easier.
• Existing cable infrastructures can be used and expanded instantly, e.g. when constructing new
star distributors using 4-channel or 8-channel distribution modules.
The device can therefore be supplied with the option of a ready-mounted fieldbus connector.
Fieldbus connectors for retrofitting can be ordered from Endress+Hauser as a spare part
(Page 56).
Supply line/T-box shielding
Use cable glands with good EMC properties, if possible with all-round contact of the cable shielding
(Iris spring). This requires small differences in potential, poss. potential matching.
• The fieldbus cable shielding must be intact.
• The shielding connection must always be kept as short as possible.
Ideally, cable glands with Iris springs should be used for the shielding connection. The shielding is
positioned on the T-box housing by means of the Iris spring located inside the gland. The shielding
braid is located beneath the Iris spring. When the armored thread is tightened, the Iris spring is
pressed against the shielding, thereby creating a conductive connection between the shielding and
the metal housing.
A connection box or a plug-in connection is to be seen as part of the shielding (Faraday shield). This
applies, in particular, to remote boxes if these are connected to a FOUNDATION Fieldbus
measuring device by means of a pluggable cable. In such instances, a metallic connector must be
used where the cable shielding is positioned at the plug housing (e.g. prefabricated cables).
A0007346
Fig. 19: Connectors for connecting to the FOUNDATION Fieldbus
1 Protection cap for connector
2 Fieldbus connector (pin assignment/color codes)
2.1 Brown wire: FF+ (terminal 1)
2.2 Blue wire: FF– (terminal 2)
2.3 Not assigned
2.4 Green/yellow: earth (notes on connection
 Page 21, 24)
Connector technical data:
– Degree of protection IP 67
– Ambient temperature: –40 to +150 °C (–40 to +302 °F)
2.22.3
2.12.4
1
190 mm
26.5mm
(1.040")
M20.5
7/8-16 UNC
2