Acquisition Of Speed With Hall Generator - Siemens LMV37.4 Series Basic Documentation

124/235
Building Technologies Division
Industry Sector
Speed sensor
Figure 75: Speed sensor
Selection of fan motor
Motor supplier:
Selection of a motor with threaded hole M8 x 15 at the end of the fan motor's drive
shaft.
Standard motor and machining (drilling hole and cutting thread M8 x 15).

12.7.2 Acquisition of speed with Hall generator

If the speed is acquired via a Hall generator, the requirements for safety-related
applications are the same as those for the speed feedback signal via sensor disk.
Required is an asymmetric signal with the 3 pulses of 60°, 120° and 180° for detection
of the direction of rotation.
Basic documentation LMV37.4...
12 Fan control
2
CC1P7546en
20.09.2013