Product Description:

The BTA20.3-NB-NN-VB-BS machine control board is produced by Bosch Rexroth Indramat as part of the BTA20 Machine Control Boards series. The module serves as a remote input/output and safety node that links field devices to higher-level PLCs, allowing machine builders to consolidate wiring and coordinate emergency-stop chains inside one enclosure. It accepts operator signals, forwards status data, and supervises interlocks so motion drives and actuators can be governed within automated production lines.

The communication layer supports INTERBUS-S / BT-BUS protocols, so the board can be scanned cyclically by the central controller with three-word telegrams that match its I/O image. On the sensor side, it offers 8 digital inputs for 24 V signals, while the actuator side provides 8 digital outputs; each output can source up to 200 mA. Two E-stop circuits are routed to the logic core to provide immediate shutdown paths that operate independently of the field bus. The varnished aluminum front panel carries membrane keys and status LEDs and, together with the IP65 rating, permits installation on machine doors exposed to dust or coolant. A BTC06.2 mobile terminal port is present for parameter entry and diagnostics.

The enclosure profile is compact for panel integration: depth is 119 mm, overall height is 169 mm, and the front width reaches 407 mm. For inside-cabinet layout, the backplane mounting points observe a 138 mm vertical and 375 mm horizontal spacing, so drilling templates can be prepared before wiring. An override switch on the front panel transmits positional information with 4-bit Gray code, enabling safe speed reduction modes without ambiguous transitions. These dimensional and coding parameters support accurate space allocation while integrating manual overrides into standardized safety routines.