Emerson EPRO Shaft displacement monitor MMS6250
Description:
MMS 6250 provides altogether 6 function outputs. These function outputs may be used as alarm outputs as well as for indications of individual module or error conditions. 
The axial-position measuring and protection system DAPS, DAPS AS and DAPS TS serve the measurement and protection of inadmissible
high axial displacements of the turbine shaft.
DAPS systems in combination with safety shut-off valves in power plants are suitable to replace older mechanical position control and
protection systems.
Due to the consistent triple channel design, beginning with the signal acquisition up to the evaluation of the measured shaft displacement, the operational safety and also the protection function on a high level can be ensured.
Alarm outputs and error messages are output as potential-free relay outputs and as short-circuit proof binary 24 V outputs.
Beside this the alarm outputs are also available as potential free relay contacts in 2-out-of-3 logic.
The system includes an extended fault detection function. The three sensors are continuously checked on operating within the permitted limits.
Moreover, the channels mutually check and supervise the output signals of each other. If the internal fault detection function detects an
error, this will be indicated via the output contacts and shown on the display as plaintext. By using prefabricated connection cables and screw terminals, the systems may be integrated economically in 19“ cabinets.