Product Description:

The CDB01.1C-SE-EN2-EN2-NNN-NNN-S2-S-NN-FW is a modular control section produced by Bosch Rexroth Indramat for the CDB Control Units series. Installed inside a Rexroth drive stack, it coordinates axis functions, handles field-level communication, and issues motion commands to connected power sections. Within an automation cell, it acts as the logic core by translating network telegrams and encoder feedback into precise drive signals so that servomotors follow programmed speed, torque, or position profiles.

Electrical loading on the host supply is limited because the board’s basic demand is only 9 W. Each analog input presents an impedance of 160 kΩ, which minimizes sensor loading and improves measurement fidelity, while the analog outputs change in discrete steps of 19.5 mV/inc for fine control of connected actuators. The eight digital output channels can each source up to 500 mA, enough to drive contactors or indicator lamps directly. During power-up, the circuit experiences an inrush of 6 A lasting 60 ms, so upstream protection devices must tolerate that short surge. Additional timing characteristics include a 4 µs probe pulse used for position capture operations. The RS-232 service port is reserved for maintenance, and it supports a maximum rate of 115 kBaud for parameter access and diagnostics.

Two feedback channels accept 2 × EnDat 2.1 / 1 Vpp / 5 V TTL encoders, and each channel is supplied through the En2 rail at 5.0 V DC with up to 350 mA available for sensor power. Real-time command traffic moves over SERCOS II, which is transmitted through a Fiber Optic ring to improve noise immunity in electrically harsh environments. Functional safety relies on the integrated Safe Motion set, and wiring for these channels is routed through the D-Sub 9-pin female safety connector. The board’s internal timing coordinates multi-axis moves during synchronized operation.