Configuration Of The Digital Output - Faulhaber 22 BX4 SC Series Technical Manual

Description of functions
5.3

Configuration of the digital output

The digital output can be configured for the following tasks:
Fault output
When current limitation is activated, the output switches to high level. The delay

between activation of current limitation and setting of the output can be adjusted.
When current limitation is deactivated, the output switches to low level.

Frequency output
 The frequency output can be used to determine the actual motor speed. In this exam-
ple, a signal contains 6 lines per motor revolution.
Fig. 17: Signal structure of frequency output
T Pulse duration
In order to increase the edge steepness at the digital output, an additional external
pull-up resistor can be connected.
Observe the maximum load capacity of the digital output.
By connecting the internal pull-up resistor (22 kΩ) between FG and the supply voltage
U , cable-based electromagnetic RF interference can impair the frequency signal. This
P
RF interference does not have a negative effect on the speed and rotation direction of
the motor.
Fig. 18: Connection of an additional pull-up resistor
1 Not available for BRC motors
2nd edition, 31-03-2020
1
U
FG
T
31
6T
1
U
P
6
FG
3
GND
7000.05061, 2nd edition,
t
31-03-20207000.05061