BTA20.3-NA-WP-VB-BS Bosch Rexroth Indramat
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The Bosch Rexroth Indramat BTA20.3-NA-WP-VB-BS comes from the BTA20 Machine Control Boards series and features 40 inputs, 24 outputs, and a data width of 48 bits. Its front panel is made of varnished aluminum with an IP65 protection rating and provides communication through INTERBUS-S, BT-BUS, RS232, and RS422 interfaces. The board's dimensions are 407 x 169 x 119 mm and it supports a per-output current of 200 mA.
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Product Description:
The BTA20.3-NA-WP-VB-BS is a machine control board produced by Bosch Rexroth Indramat for the BTA20 Machine Control Boards series. It installs behind an operator panel and links discrete I/O channels with the motion or logic controller of a production cell. By concentrating field wiring and bus communication on one module, the board coordinates tool feeds, spindle drives, and auxiliary devices in automated machinery. This arrangement helps keep the control section organized and reduces the need for separate interface hardware behind the panel.
In operation, the board communicates with the supervisory CNC through INTERBUS-S / BT-BUS, and a dedicated connector provides one INTERBUS IN port and one OUT port for placement in the remote chain. Each transaction carries a 48 bit data word for cyclic bus exchange, while the board itself provides 40 inputs and 24 outputs for field signals. Every output channel can source up to 200 mA, allowing direct operation of relays, contactors, or indicator lamps without intermediate amplifiers. An RS-232 socket supports local diagnostics, while the RS-422 link includes one input and one output for longer cable runs to adjacent terminals. The remote bus bandwidth reaches 500 kbaud, which helps keep response times short during fast feed or spindle control sequences. That communication structure supports steady exchange of command states, acknowledgments, and device status across the machine.
The front side is sealed to IP65, and the varnished aluminum panel measures 407 × 169 × 119 mm, providing room for switches, legends, and access points on the faceplate. Cabinet installation uses a frame of 375 × 138 × 119 mm that locks to the enclosure and keeps the module aligned with neighboring hardware. Two feed or spindle override dials are scanned through a 4-bit Gray Code pattern, which helps prevent ambiguous readings while the setting is being changed. For network management, the INTERBUS identification code is 3, allowing the controller to recognize the module automatically. The aluminum faceplate and varnish help resist oils and cutting fluids on the machine side without changing the stated mounting depth.
Frequently Asked Questions about BTA20.3-NA-WP-VB-BS:
Q: Which communication bus interfaces are available on the BTA20.3-NA-WP-VB-BS machine control board?
A: The BTA20.3-NA-WP-VB-BS supports both INTERBUS-S and BT-BUS communication standards.
Q: How many input channels does the BTA20.3-NA-WP-VB-BS control board feature?
A: This model provides a total of 40 input channels, making it suitable for complex machine control applications.
Q: What is the maximum per-output current supported by the BTA20.3-NA-WP-VB-BS board?
A: The per-output current rating on this control board is 200 mA.
Q: What are the material and protection characteristics of the BTA20.3-NA-WP-VB-BS front panel?
A: The front panel is constructed from varnished aluminum and carries an IP65 protection rating.
Q: How is the override value encoded on the BTA20.3-NA-WP-VB-BS control board?
A: Override selection is encoded using a 4-bit Gray code system on this model.
