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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

07KT97 GJR5253000R4270 module

DDCS Branching Unit (DBU) is used (only for DCS 600/DCF 600) to implement the star topology of DDCS link. This allows a slave unit to fail or become unpowered without disabling the communication. The NDBU receives messages from the master (PC) and sends them to all the slave units simultaneously. Each slave unit has an individual address and only the addressed slave unit sends a reply message to the master. It is also possible to use NDBU thus enabling peer-to-peer communication.NDBU-95 DDCS Branching Unit has nine output channels where messages from the master are sent. The reply message sent by one slave unit is delivered to the master and it can be delivered also to other slaves if necessary. Several NDBU-95s can be used in parallel, in series or in any combination of these. The maximum distance between the master and NDBU-95 as well as between two NDBU-95s, see manual 3ADW000100R0201.The DCS 500 system has different options for the field supply. There are one and three phase field exciters available, which can be either integrated (diode field exciter SDCS-FEX-1 and half controlled field exciter SDCS-FEX-2) or externally mounted (half controlled DCF503-0050 with the SDCS-FEX32 board and fully controlled DCF504-0050 with the SDCS-FEX-31 board). Three phase field exciters are converter modules themselves with the output current range similar to the DCS 501/601 or DCS 502/602. This possibility is described by a seperate documentation.

SDCS-FEX-1 (internal)

 The Diode Field Exciter board SDCS-FEX-1 is a single phase diode rectifier for an AC input voltage up to 500 V and a DC output current of 6 A. The board has to be mounted inside the armature converter module. The excitation current is defined by the DC output voltage (line voltage multiplied by 0.9) and the resistance of the field winding. By using an external resistor in series with the field winding the field current can be adapted slightly. If the SDCS-FEX-1 board isn't already installed it must be mechanically fixed beside the electronic power part SDCS-POW-1 and connected via a flat cable to the SDCS-CON-x by using terminal X14.The field exciter board SDCS-FEX-2 / FEX-2A consists of a power part and a control board,which connects all components electrically and mechanically to each other. This arrangement has to be mounted inside the armature converter module beside the electronic power supply SDCS-POW-1. This is intended to be done for DCS modules of type C1, C2 and C3, not for C4! The power part is build up with two power modules. Each of the modules consists of one diode and one thyristor, so they are wired up and controlled like a half controlled bridge

The control is based on a fully digital system. The µ-processor reads all information from the power part, is supplied with all needed voltage levels and control signals via the flat cable X14 by the SDCSCON-x and generates the firing pulses for the power part. The range of the single phase rated AC input voltage is 110 V to 500 V, the maximum current capability is 16 A. If this field exciter is used for smaller field current, the control unit automatically selects a lower current range between 3 A to 16 A to get the best resolution.