Product Description:

The BTA20.3-NA-LF-VA-BS is a machine control board produced by Bosch Rexroth Indramat for the BTA20 Machine Control Boards series. Installed inside operator consoles and distributed cabinets, the board combines discrete input collection, output driving, and safety channel monitoring for automated machinery. By linking directly to INTERBUS remote segments, it serves as an expandable node that translates field-level signals into the higher-level motion and logic layers that run an industrial cell. This arrangement lets one board supervise local pushbuttons, indicators, and interlocked machine functions without requiring separate interface modules.

INTERBUS-S and BT-BUS connectivity is supported, and a remote transfer speed of 500 kbaud keeps command and feedback latency low when the board is tied to a PLC rack. The cyclic message frame spans 48 bits, so mixed status flags and numeric values can be exchanged without segmentation. Each output channel sources up to 200 mA, which covers pilot lamps, contactor coils, and small solenoids. A molded front panel sealed to IP65 protects connectors against dust and water jets on machine doors. Signal density is high because the card accepts 40 opto-isolated inputs while occupying only 22.5 mm of DIN-rail width per built-in element. Three separate enabling circuits provide the controller with graded start permissions, and override rotation is read by a 4-bit Gray code coder.

The board drives 24 discrete lines that are routed through 8 interchangeable sockets. Two fail-safe channels form the 2 emergency-stop circuits, while three key-switch positions and an Interbus ID code of 3 support mode selection and network addressing. The mounting footprint is 375 × 138 × 119 mm, and the overall casing measures 407 x 169 x 119 mm. During installation, the element blocks are aligned in the panel opening, wiring is routed to the socket groups, and bus communication is checked with the master before operation.