RECO-PC-104 V1 LK DNM03

The RECO-PC-104 V1 LK DNM03 module is a PC/104-format network interface released by Bosch Rexroth Indramat within the RECO Drive Modules series. It mounts on processor stacks to add DeviceNet connectivity to drives and motion controllers, allowing cyclic and acyclic data exchange between a control system and distributed I/O stations in automated machinery. Its form factor and pinout allow it to fit directly into standard embedded racks used on Rexroth drive platforms.

For electrical integration, the board draws up to 650 mA from the backplane and operates from a single +5 V ± 5% supply, simplifying power budgeting in compact enclosures. A fixed 120-ohm line termination is provided, so an external resistor is not needed at the end of the CAN segment. Bus access is handled by the Philips SJA 1000 CAN controller, which performs message filtering and error handling in hardware while following the DeviceNet physical layer described in ISO 11898. Control software runs on a 16-bit processor that addresses 128 KB of static RAM for parameter buffers. A dedicated RS-232C diagnostic port supports laptop-based service tools without interfering with field traffic.

Offline maintenance uses a selectable 9600-baud rate on the serial channel. On the CAN side, the card accepts network speeds up to 500 kbaud, sustaining a 7 KB process image that is cached inside 8 KB of dual-port memory for deterministic host access. The DeviceNet master table can enumerate up to 63 slaves, and each node may provide as much as 256 bytes of combined input and output data. Configuration data and boot code reside in 512 KB of flash memory, allowing software updates without physical changes to the board. The available memory supports parameter storage and temporary buffering as messages pass between the network controller and the host processor.