Product Description:

The CLC-D02.3-FW is a motion controller module manufactured by Bosch Rexroth Indramat for the CLC Motion Controllers series. Installed in a central rack, it generates coordinated command values for servo drives, supervises feedback data, and manages program execution so automated machines follow precise position, velocity, and timing profiles during operation. Because motion logic is processed locally, host PCs can concentrate on supervisory tasks while the controller maintains deterministic axis control across the SERCOS fiber network. This arrangement helps keep multi-axis sequences synchronized when several drives must respond to the same program cycle without added communication delay. It is suited to machine platforms that require centralized coordination of several axes from one rack-mounted control point.

Its hardware platform centers on a 68EC020 microprocessor operating at 25.0 MHz, while the 68882 coprocessor speeds floating-point calculations used in contouring and interpolation. Program code is stored in EPROM up to 1 Mbyte across two sockets, and variables are kept in 512 Kbyte of SRAM to support predictable cycle timing. No digital I/O is onboard, so axis data is exchanged over SERCOS through one input port and one output port on the fiber network. Two serial channels support setup and diagnostics through RS-232, RS-422, or RS-485 connections with transfer rates up to 115.2 kbaud. The serial links can also maintain a fixed connection to higher-level equipment without using the fiber motion channel.

Power for the controller is supplied from the backplane at +5 Vdc, and typical consumption is 800 mA, so the backplane supply must support that load continuously. A lithium 0.9 Ah backup battery of type CR2477N maintains the real-time clock and preserves SRAM data when main power is removed, and the cell provides a nominal 3 V to the memory subsystem. A computer can connect through the RS-232/422/485 ports for setup or diagnostics, while external I/O modules handle field contacts instead of the controller itself. That layout leaves the board focused on motion sequencing, serial communication, and memory retention functions.