HBM VK20A, Mounting Instructions

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Electrical connection
VK20A
A02335_03_Y00_00 HBM: public
19
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.
1 6 1
A2
A1
1 6 1
6
1 6 1 6
1 6 6
A3
S1
Control signal
Supply
voltage
Angle of rotation/
rotation speed
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.