Product Description:

The CSH01.3C-PB-EN1-EN2-CCD-S2-S-NN-FW is a single-axis control card from the CSH Advanced Controllers series manufactured by Bosch Rexroth Indramat. Installed in IndraDrive power sections, the board executes motion commands. It also processes fieldbus traffic and conditions feedback signals so servo drives can follow position and velocity setpoints in industrial automation cells.

The board provides 2 analog outputs that a higher-level PLC can use for reference or diagnostic signals, and its internal power stage can switch up to 16 kHz to modulate motor phases with fine time resolution. Profibus connectivity is implemented through a D-Sub 9-pin female connector, and the bus driver maintains a differential control output resistance of 350 Ω to match segment impedance and minimize reflections. A dedicated repeater section regenerates degraded telegrams and is powered by a separate 5 VDC repeater supply, allowing network extension without loading the host backplane. The Profibus repeater draws 75 mA, while the control electronics supervise telegram timing so the board can occupy either a master or slave slot on a multi-drop segment.

Encoder interface EN1 distributes feedback power at 8 VDC and can source up to 250 mA for HSF encoders. When a resolver is connected to the same channel, the excitation carrier is injected at 4 kHz with an amplitude of 18.2 Vpp, and the resolver pickup current is limited to 70 mA to prevent coil saturation. The secondary EN2 port supplies 5.0 VDC with sense lines and permits 350 mA so low-impedance TTL encoders remain within regulation. Across both channels, position data are filtered by the controller’s DSP before being forwarded to the drive firmware, and the analog section’s 16 kHz internal sampling keeps feedback, Profibus telegrams, and pulse-width modulation events synchronized.