Functional Check; Control Signal (T20Wn, T21Wn) - HBM VK20A Montageanleitung

5.1.8

Functional check

Three green control diodes for checking the wiring and a control signal push
button (for T20WN, T21WN) are integrated in the junction box.
Diode A1 comes on whenever a stabilized supply voltage of 12 V is made
available to the torque transducer. LEDs A2 and A3 flash whenever the input
shaft of the T20WN, T21WN turns slowly.
Control signal
Fig. 5.5 Control LEDs and control signal push button
5.1.9

Control signal (T20WN, T21WN)

You can trigger a control signal of +10 V ("0.2 %):
S with push button S1 on the board (as long as it is pressed; see Fig. 5.5).
S with an external push button or relay point on strip terminal St7, terminals 3
and 4 (see Fig. 5.6).
S with an external voltage (5 V...30 V) at strip terminal St7, terminals 2 and 3
(see Fig. 5.6). The input is potential‐free by using optical couplers.
VK20A
1 6 1
6
S1
A1
6 1
A02335_03_Y00_00 HBM: public
1 6 1 6
A3
A2
6 1 6 1
Electrical connection
Angle of rotation/
rotation speed
19