Product Description:

The BTA20.3-ND-PN-VB-BN machine control board is produced by Bosch Rexroth Indramat for the BTA20 Machine Control Boards series. Intended for installation behind an operator panel, the board consolidates safety, motion, and spindle supervision functions required by modern machine tools. It accepts field signals, executes hard-wired interlocks, and passes formatted data over RS422 to the master controller so that axes, auxiliary drives, and human-machine interfaces follow coordinated sequences during automated production. This placement keeps panel-related control functions close to switches and indicators, which helps maintain orderly signal handling during routine machine operation.

Physical integration is eased by a depth of 148 mm, a width of 407 mm, and a height of 169 mm, letting the unit occupy a single rack slot while still providing access to service plugs. The logic section exposes 4 digital inputs that sense limit switches or selector keys, and 8 digital outputs that drive relays or stack lights. Internal jumpers route three enabling circuits that let the machine builder create hierarchical power-on routines, while discrete wiring for the emergency channels remains independent. Communication with the supervising drive controller uses one RS422 input port and one output port, and both reside on a 15-pin connector that carries differential transmit and receive pairs along with reference grounds. The connector layout also supports clear separation between local panel wiring and the control link to the higher-level system.

For operator protection, 2 E-stop circuits interrupt all motion commands when a safety push button is opened, and the aluminum front frame meets IP65 to block dust and low-pressure water. Control electronics function from +5 °C up to a maximum of +45 °C, permitting use in typical shop floor environments where enclosure heat can build during long operating periods. Non-operational storage can range from -20 °C to +60 °C without condensation damage. A spindle override that reaches 45 % of nominal speed permits cautious jogs during fixture setup and test cycles, and it allows controlled spindle movement when reduced speed is preferred.