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Maintenance / Repair
9.3
Replacing the transmitter
The transmitter plug-in module can be replaced without loss of function for sizes DN 1 ... DN
1000.
When replacing the FRAM-calibrated flowmeter sensor (identifiable by the Cs and Cz values on
the model plate), please take into consideration the following points:
•
Does the replacement transmitter plug-in module use the same supply power?
•
Does the replacement transmitter plug-in module have the same input/output functions or
use the same type of communication?
Important for plug-ins with PROFIBUS PA / FOUNDATION Fieldbus
If the transmitter is located at the bus end and if the bus termination is activated via both hook
switches, the bus termination is canceled when the transmitter plug-in module is removed. The
bus is no longer terminated properly.
Warning – Electrical voltage risk!
When the housing is open, EMC protection is impaired and protection against contact is
suspended.
•
Power to all connecting cables must be switched off.
1. Switch off the supply power before installing the replacement transmitter plug-in. After
waiting 40 minutes, remove the housing cover from the field housing unit. First, remove the
protective cover (3 screws). Next, remove the upper mounting screw and the center stay-bolt
on the plug-in. The plug-in module can now be pulled up and off the connection plug. Install
the replacement transmitter plug-in in reverse order.
Fig. 53
1 Protective cover
2 Screws for cover
106
1
FSM4000
2
G00579
3 Mounting screw for plug-in module
4 Stay-bolt for plug-in module
5 Transmitter plug-in module
G00580
4
D184B140U02
3
5
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