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Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

5SHY3545L0016 3BHB019719R0101 High voltage module

The control unit includes the following main blocks: - Micro controller H8 for control and firing - Actual DC current measurement with an AC current transformer. - RS485 interface to the converter's controller board SDCS-CON-x. The software for the field current control is stored in the FlashPROM memory. This software contains a PI current controller Fault/reset logic Synchronization and PLL function Bridge reversal function (only DCF 504A) The setting and updating of all control parameters are set from armature converter via RS485 interface. Actual current, field current reference, control and status bit are cyclic sent via RS 485 communication. The field exciter is equipped with an auto-scaling function of burden resistor based on the nominal field current of the motor. The output Iact represents the actual field current, which is measured via the AC transformer, then rectified and transferred into a voltage signal with burden resistors. The burden resistors -scaled to measurement range- are adapted by the board itself depending on the setting of the nominal motor field current.If a DCF503A-0050 is in use two diode-thyristor modules are arranged as a half-controlled singlephase rectifier. If a DCS504A-0050 is in use four thyristor-thyristor modules are arranged as a fullcontrolled single-phase rectifier. The anodes of the two diodes (anodes / cathodes of the thyristors) are not connected directly to each other as usual; they are connected to the ends of the primary winding of the current transformer. The centre tap is the negative output of the rectifier. Thus it is possible to measure the DC current with an AC current transformer

Field exciter configurations 

The data exchange between the SDCS-CON-x and the field exciter SDCS-FEX-2 or the DCF503A/ 504A-0050 is done via a RS485 serial link, which can be configured as a bus structure. This link is used to transfer references, actual values and settings for up to two field exciter units. The drive software located on the SDCS-CON-x board consists of two field supply functions, first field exciter and second field exciter. The first field exciter is already connected to the EMF controller to control the motor in all points of the motor diagram. The second field exciter is accessible via the field current reference. The RS485 interface works with a screened twowire cable. The allowed length is 5 m. The wires have to be connected to the terminals X2:1 and X2:2 and the screen to X2:3. Typical application of this kind is two DC motors connected to one converter. The load sharing can be done by means of adjusting the excitation current of the second DC-motor. There are two possible configurations for two Node numbers of the field exciters: - one SDCS-FEX-2 and one external field exciter (DCF503A-0050, DCF504A-0050 or 3-phase field exciter) or - two external field exciter units (DCF503A-0050, DCF504A-0050 or 3-phase field exciter). A MOV (Metal Oxide Varistor) protects the AC input against voltage spikes from the external source. Another MOV protects the DC output against voltage surges which can be caused by the field winding of a DC machine. The free wheeling function needed e.g. during network failure is ”build in” because of the diodes, if the half-controlled version is in use. If the full-controlled version is used the free wheeling function is realized by using the thyristor