STOBER
Glossary
02/2019 | ID 442728.05
251
Glossary
100Base-TX
Ethernet network standard based on symmetrical copper cables in which the nodes are
connected to a switch via copper cables twisted in pairs (shielded twisted pair, CAT 5e
quality level). 100Base-TX is the subsequent progression from 10Base-T and includes those
properties with the option of a transfer speed of 100 Mbps (Fast Ethernet).
Braking resistor
Ballast resistor that is switched on by a brake chopper in order to avoid a hazard to
electrical components in the event of significant brake energy by limiting the DC link voltage.
Braking energy, which is usually only present for brief periods, is converted into heat in the
resistor.
Choke
Coil that preserves the components of the drive system and reduces interference pulses. It
is used to protect components, devices or power supplies while simultaneously increasing
their interference immunity and availability.
DC link discharge
Process that causes the DC link capacitors to discharge. Requirements for the discharge
process: The power grid supply is disconnected and no energy flows back from the motor to
the drive controller.
DC link discharge time
Time until the DC link capacitors are discharged enough that the device can be worked on
safely.
Differential (HTL/TTL)
In the context of signal transmission, a process for being able to transmit signals with the
highest possible fault tolerance even with longer transmission paths. In this approach,
transmission takes place using a pair of signal conductors instead of just one signal
conductor. The actual signal is transmitted on one line and the inverse signal on the other.
Electronic nameplate
STOBER synchronous servo motors are generally equipped with absolute encoders that
provide special memory. This memory includes the electronic nameplate, i.e. all type-
relevant master data as well as special mechanical and electronic values of a motor. When
you operate a drive controller with a STOBER synchronous servo motor and an absolute
encoder, the electronic nameplate is read and all motor data transferred if the drive
controller is connected online. The drive controller automatically determines the associated
limit values and control parameters from this data.