Product Description:

The BTA20.3-NA-WH-VC-BS control board is manufactured by Bosch Rexroth Indramat within the BTA20 Machine Control Boards series. It serves as a modular interface between distributed sensors, actuators, and higher-level motion controllers in automated production cells. By combining discrete field wiring, bus communication, and front-panel protection, the board simplifies installation in cabinets or operator stations where rapid exchange of digital signals is required for sequence control.

Its processing section handles a word length of 48 bits, allowing simultaneous evaluation of machine status flags and command registers without extra cycle overhead. The I/O zone provides 40 digital inputs for proximity switches or photo-eyes and 24 digital outputs for contactors, relays, or indicator stacks; eight of the input lines and eight of the output lines are galvanically isolated to prevent ground loops when external supplies are used. Field wiring terminates on the front face that carries an IP65 rating, so splashed coolant or airborne dust do not affect pushbuttons and indicator legends. For cell networking, the board supports the INTERBUS-S / BT-BUS protocol, giving deterministic exchange of control words between multiple stations. A die-cast aluminum enclosure that measures 407 mm wide, 169 mm high, and 119 mm deep protects the circuitry and leaves sufficient space for cable bends.

Safety and power-distribution features are integrated on the backplane. Two dedicated circuits provide 2 emergency stops that can sever actuator energy lines in less than one scan, while three independent channels supply 3 enabling circuits that must be closed before motion tasks can start. Each output channel can source up to 200 mA, so the board can drive small solenoid valves or pilot relays directly. System traffic is forwarded over the remote bus at a rate of 500 kbaud, matching the cycle time requirements of mid-size assembly systems. For panel layout, mounting slots are positioned at 138 mm by 375 mm, aligning with standard DIN-rail brackets and keeping the isolated I/O groups accessible from the front.