products

Digital Axial Position Protection System

with PROFIBUS-DP Interface DAPS, DAPS AS, DAPS TS

● Microcontroller based 3-channel measuring system

● PROFIBUS-DP Interface (optional)

● High safety level due to password protection at each of the monitors

● Up to 6 limit values per channel

● Two current outputs per channel, one of them electrically isolated

● Analog comparison between the three channels

● Redundant supplies for monitors and backplane

● Self-test functions for electronic circuits and sensors

● Simplified fault detection by display messages in plaintext

● Electrical isolation of binary input and output signals

● RS 232 Interface for input of parameters

● RS 485 interface for data exchange with the host computer

● Hot swap of boards during operation Application:

The axial-position measuring and protection system DAPS, DAPS AS and DAPS TS serve the measure

ment 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 chan

nel 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.