Product Description:

The BTA20.3-NA-SP-VA-BS module is a machine control board produced by Bosch Rexroth Indramat within the BTA20 Machine Control Boards series. Deployed inside operator stations or cabinet racks, it relays safety, fieldbus, and manual override information between sensors, drives, and higher-level PLCs. In automated lines, the board coordinates emergency-stop chains and runtime interlocks so that motion axes and tooling respond predictably to operator commands.

For primary power, the board draws a nominal supply of 24 VDC, and an auxiliary regulator provides up to 200 mA at 24 V for local sensors or indicator lamps. Process data moves across a 48-bit backplane, and a width of 48 bits allows simultaneous transfer of position, status, and checksum words without serialization delays. When linked to Interbus, the communication layer is clocked at 500 kbaud, matching the timing budget of adjacent drive controllers. Eight digital sensing channels accept limit switches, light curtains, or barcode readers, and the board supports 8 external inputs. The card also provides one Btc06.2 diagnostic port, two internal emergency-stop circuits, three enabling circuits, and eight transistorized external outputs for lamp stacks or relays.

The front panel carries an IP65 rating so washdown or dusty environments cannot foul the membrane keys, while the side and rear areas are ventilated to the enclosure standard of IP20. Sixteen coded selector points give operators 16 override positions for jog, feed, or maintenance modes without reprogramming the PLC. If long cable runs are required, the onboard converter changes signaling from RS232 to RS422/485 so noise immunity is preserved on multi-drop segments. This helps the board maintain dependable communication in installations with longer wiring paths and electrically noisy surroundings.