Product Description:

The CDB01.1C-SE-EN1-EN1-MA1-MA1-NN-S-NN-FW is a control unit produced by Bosch Rexroth Indramat within the CDB Control Units series. It mounts on an IndraDrive power section and manages up to two coordinated servo axes, giving compact motion control for packaging, material-handling, and general automation cells. By combining axis processing, fieldbus communication, and analog interface circuitry on one board, the module replaces separate PLC interface cards and simplifies cabinet layout. This arrangement also reduces the number of interconnections inside the drive assembly, which helps keep signal routing direct and organized.

This unit draws only 9 W of base power, so internal heat buildup is minimal. Command and diagnostics are exchanged over the SERCOS II fiber-optic bus, while an RS-232 service port supports speeds to 115 kBaud for setup and diagnostics. The SERCOS node is powered by an EN1 logic rail that supplies 8 VDC. Four differential inputs and four analog outputs allow direct connection of external sensors and actuators. Each MA1 input channel presents 1000 kΩ of resistance and is digitized at 5 mV per increment for accurate setpoint capture. Resolver or HSF encoder signals are accepted through a dedicated feedback path, and the board provides excitation and decoding without external converters.

Each MA1 output can drive loads down to 1 kΩ with the same 5 mV step size, and a relay contact rated at 24 VDC, 1 A supports motor-ready or fault signaling to external circuits. Feedback carriers are generated at 4 kHz, and rotor position excitation is delivered at 18.2 Vpp for stable resolver operation. The optical SERCOS channel can be clocked as high as 16 MBaud when short cycle times are required, which supports synchronized control of both axes during rapid interpolation. These interface functions allow the control section to exchange motion commands, status data, and feedback signals without requiring separate signal conversion hardware.