Pilz PMCtendo DD5 Operating Manual page 34

Function description
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Multiple servo amplifiers interconnected via the intermediate circuit (DC+, DC-)
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} The technical details for the brake resistor depend on the type of servo amplifier and
the mains voltage.
4.2.5 Intermediate circuit
Multiple servo amplifiers can be interconnected via the direct current intermediate circuit
("intermediate circuit" for short). This interconnection is termed a multi axis system.
This connection:
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Balances the braking and operating energy of multiple axes.
}
Distributes the braking energy over multiple brake resistors.
Optionally, an energy store can be connected
(see Energy store PMCenergy SD).
4.3 Control element
The control element has the following tasks:
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Controls the semiconductor on the power element
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Exchanges data between the servo amplifier and periphery
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Records and displays errors and messages
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Performs protective functions for the servo amplifier and motor
Processing of the setpoints with current, speed and position controllers is fully digital.
Operating Manual PMCtendo DD5
1002236-EN-04
The servo amplifier detects overvoltage on the intermediate circuit. The power ele-
ment shuts down. The following error message appears: "F02: Overvoltage".
The relay contact for operational readiness, BTB/RTO, opens.
Multiple servo amplifiers of the same series with mains voltage from the same
mains can be operated on a common intermediate circuit.
90% of the total output of all the servo amplifiers is always available for peak and
continuous output. In the case of overvoltage, the amplifier shuts down at the lowest
shutdown threshold based on the tolerance (as described above for the single amp-
lifier).
NOTICE
High transient currents between connected intermediate circuits can destroy
the servo amplifier.
- Supply the servo amplifier from the same mains (identical mains voltage).
- Do not wire servo amplifiers with smaller outputs between two servo ampli-
fiers with higher outputs.
- Ensure that the total rated currents of all the servo amplifiers connected in
parallel in an intermediate circuit is not exceeded.
– 230 V series: Max. 24 A
– 480 V series: Max. 40 A
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