13
Notes:
The terminals for the fieldbus connection (1+ and 2-) are not polarity sensitive.
Conductor cross-section:
max. 2.5 mm
2
for screw terminals
max. 1.5 mm
2
for spring terminals
A shielded cable must be used for the connection.
3-4-2. Fieldbus connector
Optionally, a fieldbus connector can be screwed into the terminal head or field housing
instead of a cable gland. Fieldbus connectors can be ordered as an accessory (see Section 8
'Accessories').
The connection technology of Foundation Fieldbus™ allows measuring devices to be
connected to the fieldbus via uniform mechanical connections such as T-boxes, junction
boxes, 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.
Fig. 3-4. Connectors for connecting to the F
oundation
Fieldbus™
A Fieldbus connector (pin assignment/color codes)
- 1 Blue wire: FF. (terminal 2)
- 2 Brown wire: FF+ (terminal 1)
- 3 Gray wire: shielding
- 4 Green/yellow wire: ground
- 5 Positioning tappet
- 6 7/8" UNC thread
B Terminal head thermometer
C Connector at the housing (male)