Cable Cross-Sections And Connections On Sinamics G130 Chassis Units; Precharging Of The Dc Link And Precharging Currents - Siemens SINAMICS G130 Engineering Manual

SINAMICS G130
Engineering Information
Terminal block on the TM31 Terminal Module
Factory setting
-X541 Bidirectional inputs/outputs
DI/DO8 Message: Ready to start
DI/DO9 Not assigned
DI/DO10 Not assigned
DI/DO11 External alarm
-X542 Relay outputs (changeover contact)
DO 0 Inverter enable (Run)
DO 1 Checkback signal No converter fault
-X521 Analog inputs, differential
AI0+ Analog input for setting speed setpoint
AI0-
AI1+ Analog input reserved
AI1-
-X522 Analog outputs
AO 0V+
AO 0- Analog output, actual speed value
AO 0C+
AO 1V+
AO 1- Analog output, actual motor current value
AO 1C+
-X522 Thermistor protection
+Temp
-Temp
The factory settings of the bidirectional inputs/outputs are underscored.
Note:
If the cables connected to the analog inputs and outputs of the TM31 Terminal Module are more than about 3 to
4 m in length, isolating amplifiers must be used to ensure reliably EMC-compliant operation. Isolating amplifiers
electrically decouple the signal source and the signal sink, thereby ensuring that any differences in reference
potential between the electronic circuitry of the unit and the higher-level control system do not cause equalizing
currents to flow across the analog signal cables. By this method, it is possible to minimize interference coupling
into the analog signal transmission system and to obtain interference-resistant analog transmission links even in
systems with long cables. For further information about EMC-compliant cabling, please refer to chapter "EMC
Installation Guideline".
5. The converter is controlled and operated exclusively via the optional AOP30.
The digital inputs/outputs on the CU320-2 or TM31 are not used for this purpose.

4.6 Cable cross-sections and connections on SINAMICS G130 Chassis Units

The maximum connectable cable cross-sections for the line and motor connections are stated in the technical data in
Catalog D11. The recommended cable cross-sections are identical to those for the SINAMICS G150 converter
cabinet units, which can be found in section "Cable cross-sections and connections on SINAMICS G150 Cabinet
Units" in chapter "Converter Cabinet Units SINAMICS G150".

4.7 Precharging of the DC link and precharging currents

On SINAMICS G130 converter Chassis units, a small precharging rectifier equipped with diodes is connected in
parallel to the thyristor-based main rectifier. If this circuit arrangement is connected to line voltage, the DC link is
charged by means of the precharging rectifier and the associated precharging resistors. The main rectifier is disabled
during this period, i.e. the thyristors are not gated. As soon as the DC link has charged, the thyristors in the main
rectifier are gated in such a way that they are triggered at the earliest possible moment. In normal operation,
therefore, the thyristor rectifier has similar operating characteristics as a diode rectifier. Almost all the operating
current flows across the main rectifier, as this presents a significantly lower resistance than the parallel connected
precharging rectifier with its precharging resistors.
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1)
Comment
Factory-set as input
Factory-set as input
Factory-set as input
The factory setting for the inputs is 10 V.
The factory setting for the inputs is 10 V.
The factory setting for the outputs is 0 to 10 V.
The factory setting for the outputs is 0 to 10 V.
Input for KTY84 or PT1000 temperature sensor or PTC
thermistor