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• DOK-POWER*-TVD*1.3****-ANW1-EN-E1,44 • 02.97
3. Electrical Connections
3.15. Electronics supply buffer capacitance
Terminal block: X7/EPU+/EPU-
Conductor cross section: 1 mm
2
Additional electronic storage capacitance may be necessary if the drives have
to be stopped under position control in the event of a mains failure.
A mains failure is signalled by the UD output. Following this, the NC controller
must initiate controlled stopping of the drives within 10 ms, so that the drive
electronics remain operational. If the elapsed time before the drives feed back
power into the DC bus circuit exceeds 10 ms, then the user can boost the
supply to the electronics by means of additional capacitors.
An aluminium electrolytic capacitor is recommended due to the limited space.
The voltage between EPU+ and EPU- can reach 450V DC. The
capacitor must therefore be rated for this voltage.
A maximum of 680
µ
F may be connected otherwise the TVD 1.3
could be damaged.
Caution !
Back-up time
Storage capacitance
(for maximum utilitzation of supply
to electronics)
20 ms
150
µ
F
50 ms
270
µ
F
100 ms
680
µ
F
