Product Description:

Bosch Rexroth Indramat builds the CSB02.1A-ET-EC-EC-L3-NN-NN-FW for the CSB Drive Controllers series. The device converts motion commands from a PLC into synchronized axis signals and forwards encoder feedback for closed-loop regulation. Because it houses encoder power rails, Safe Torque Off circuitry, and Ethernet communication, it serves as a compact interface between control logic and servo mechanics. This arrangement lets the control section remain separate from the motor power electronics, which suits modular servo systems that split command processing from power conversion.

The controller accepts a supply voltage of 24 VDC, which powers internal logic, I/O conditioning, and communication ports while leaving the power stage to an external converter. Its standby draw remains at 17 W, so cabinet heat rise stays predictable during idle cycles. Seven digital inputs interface with limit switches or homing sensors, and a count of 7 provides room for basic machine interlocks without additional modules. For analog feedback, the board provides one voltage channel, and two probe inputs capture edge-triggered events for touch-off routines. Network traffic is routed through a 100Base-TX link that terminates in an RJ-45 8-pin jack, and cable runs up to 100 m fit standard Cat5e installations. That separation allows the controller to manage sensor states, signal conditioning, and network exchange without carrying motor current.

The Safe Torque Off circuit disables gate power with only 1.0 W of demand, allowing redundant emergency-stop chains without heavy loading on the 24 V rail. High-speed position latching is supported by a square-wave input that handles frequencies up to 1000 kHz, while pulse-enable signals can be as short as 1 ms so stepper or encoder clocks are not stretched. Cold-start stress on the supply remains limited because the inrush current stays below 5 A. Dedicated encoder rails deliver 500 mA at 5 V and another 500 mA at 12 V, and an optional 1.1 W feed can be switched on for resolvers that need extra power. These timing features let the unit register fast motion events without external latching hardware. Separate encoder supply rails support different feedback devices from the same control platform.