Product Description:

The BTA20.4-NA-CP-VB-BS is a compact machine control board produced by Bosch Rexroth Indramat as part of the BTA20 Machine Control Boards series. In an automation cell, this board acts as the supervisory node that links drives, operator panels, and field devices while issuing feed and spindle commands and managing machine-level safety. Its purpose is to simplify wiring and consolidate motion sequencing, stop functions, and networked diagnostics into a single printed circuit assembly. This arrangement helps centralize control tasks that would otherwise be split across several separate modules.

Its housing measures 407 x 169 x 119 mm, and it mounts on a subplate footprint of 375 x 137 x 119 mm, so enclosure depth can be planned without interference. The logic section accepts a supply range from 18 V DC to 30 V DC, allowing the board to operate from standard 24 V control power. Safety functions use 2 dedicated emergency-stop circuits, and three enabling circuits permit motion only when the required conditions are present. The front panel has an IP65 rating, which helps protect the keypad and indicators from dust and low-pressure water. Feed and spindle speeds can each be overridden up to 120 percent during setup, and the backplane connectors provide a three-word I/O width for synchronous data exchange with connected drives.

Field communication uses an Interbus interface that runs at 500 kbaud and exchanges 48 bits of cyclic data, providing predictable handshakes with remote I/O stations. The controller accepts 8 external 24 V inputs and drives eight matching outputs, so sensors and pilot valves can be connected directly without extra relay logic for basic signal handling. During operation, it withstands ambient temperatures up to +45 °C, and storage down to -20 °C is permitted when the unit is not in service. These operating limits suit enclosed machine cabinets where moderate internal heat and direct local I/O connectivity are common.