6.6.3 Motor Thermo-Contact
The ACU frequency inverters can evaluate the thermal switch of motor. By default,
terminal X210B.1 (S6IND) is configured as an input for this evaluation. Connect the
thermal switch to the digital input and the DC 24 V supply unit X210A.1. For configu-
ration, refer to sections 13.6 “Motor Temperature” and 15.4.5 “Thermo contact”.
6.6.4 Control terminals – Connection diagrams of configurations
The control hardware and the software of the frequency inverter are freely configu-
rable to a great extent. Certain functions can be assigned to the control terminals,
and the internal logic of the software modules can be freely selected.
Thanks to the modular design, the frequency inverter can be adapted to a great
range of different driving tasks.
The demands made of the control hardware and software are well known in the case
of standard driving tasks. This control terminal logic and internal function assign-
ments of the software modules are available in standard configurations. These as-
signments can be selected via parameter
Configuration 30
. The configurations are
described in the following section.
The ACU units of the ACTIVE Cube series feature the function STO („Safe Torque Off“).
If this function is not required, the “Controller release” signal must be connected to
inputs S1IND/STOA and S7IND/STOB.
Inputs S1IND/STOA and S7IND/STOB are connected in series.
WARNING
If the same signal is used for the digital inputs S1IND/STOA and S2IND, safe discon-
nection of power supply to the motor according to safety function STO („Safe Torque
Off “) is not guaranteed.
06/13 Operating Instructions ACU 73
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