RECO-PC-104 B1 LK IBM 2

The RECO-PC-104 B1 LK IBM 2 is a communication controller board distributed by Bosch Rexroth Indramat within the RECO Drive Modules series. It occupies the master position on an INTERBUS fieldbus and is intended to coordinate decentralized I/O stations from a drive or motion control platform. By translating CPU-level commands into bus telegrams and collecting returning status data, the board streamlines deterministic signal exchange in industrial automation cells. Its compact layout allows direct stacking inside modular control racks where space is limited.

Electrically, the module follows the PC104 stacking standard, so it connects with adjacent processor cards through a self-supporting connector grid. Logic circuitry runs from a single +5 VDC rail, and typical current consumption remains near 400 mA, which reduces the load on backplane power supplies. An onboard diagnostic port uses RS-232C signaling, permitting parameter access with a handheld terminal. Field wiring leaves the card through a two-line RS-422 remote-bus driver that connects directly to shielded twisted-pair cables. Fixed addressing at 120h keeps the board in the reserved memory range of standard x86 targets, reducing setup time during system configuration.

As a network master, the controller can organize up to 256 remote bus segments across a hierarchy of 16 logical levels while supporting as many as 512 slave stations in total. Each segment may include 32 loop devices and can extend 400 m before a repeater is necessary. Digital process data capacity reaches 4096 input words and the same number of output words, providing ample room for valve terminals, drives, and sensor islands. When fiber-optic or copper repeaters are cascaded, the overall remote-bus reach extends to 12.8 km, allowing distributed machines to remain synchronized in large material-handling or packaging plants.