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Fieldbus link joins machine components

Article-Fieldbus link joins machine components

Molders can now connect all electrical and hydraulic components on a machine using a new industrial fieldbus link. The product?s manufacturer says this device could simplify the setup, wiring, and programming of machines as well as allow online troubleshooting. The system includes a bus-compatible hydraulic axis for control of machine clamps and an OBE-D2 proportional valve for direct control of the hydraulic axes. This is reportedly the first standard hydraulic valve that can integrate all open and closed loop functions needed for a hydraulic drive system. Instead of the usual, separate axis controller, the valve electronically processes the drive system?s position as well as its pressure feedback signals. This eliminates the need for separate controller modules while increasing speed.

The valve can use an analog or digital input signal with standard CANopen or Profibus-DP fieldbus protocols. Its 12-pin connector provides 24V power for bus and system, control signals, and analog checkpoints. Bus data interface is handled by an additional five-pin connector. Position, force, and speed are all controlled by the valve. Designed for bumpless transfer between position force and control, the OBE-D2 can synchronize up to four axes.

Bosch Rexroth Corp., Lehigh Valley, PA
(610) 694-8298

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