HEIDENHAIN TNC 410 M Technical Manual page 26

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CMH 120 capacitor module
For maintaining the dc-link voltage during a power failure. This is necessary,
for example, to perform LIFTOFF completely even if direct drives are used.
Several CMH modules can be connected in parallel in order to increase
capacitance.
Specifications
DC-link voltage
Capacitance
Module width
Degree of protection
ID
HEIDENHAIN Technical Manual for Inverter Systems and Motors
CMH 120
Max. 850 V
10.0 mF
50 mm
IP 20
591 116-xx