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1 Design variants
Operation Manual Supply Unit SO CM-P BG1+2
ID no.: 1400.201B.5-00 Date: 02/2020
Design variants
6 Design variants
6.1 24 V back-up on power failure
Applies to SO CM-P.xxxx.2xxx.x
6.1.1 Purpose of the function
The "24 V back-up on power failure" function is used to stop in a controlled manner the
masses moved in a mechanical system (e.g. robot arm). For this purpose the DC link in
the 24 V switched-mode power supply (24 V SMPS) is coupled to the DC links in the
axis controllers (DC Link +/-). During braking of the drive axis, energy is generated that
charges the DC links in the axis controllers. Using this additional energy the 24 V control
supply can be maintained for longer.
6.1.2 Function description
Coupling takes place immediately after precharging. For trouble-free operation, the
mains supply to the switched-mode power supply (X7) is then to be disconnected
(see Figure, contact 3.2). For this purpose the parameter 270-0 in the rmware is to be
set to the value "16".
NOTE:
The total power drawn from the internal 24 V power supply unit must not
exceed Pv = 240 W max. for this operating case!
CAUTION! DAMAGE TO THE DEVICE DUE TO ERROR IN THE WIRING!
x Carelessness may result in signicant damage.
Operation of these devices with 3 x 230 V mains supply is not allowed for the "24 V back-up on
power failure" variant.
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