Product Description:

The CDB02.1B-ET-EC-EC-EM-SB-SB-NN-NN-FW control unit is manufactured by Bosch Rexroth Indramat within the CDB Control Units series. Mounted on an IndraDrive power section, this hardware module governs individual or multi-axis servo systems in automated machinery. It interprets Multi-Ethernet traffic, encoder feedback, and built-in safety channels to generate synchronized current, velocity, and position commands. By handling these drive-level calculations, the unit relieves the PLC of high-speed motion tasks and ensures deterministic behavior on packaging lines, assembly stations, and material-handling gantries. This arrangement allows the drive system to keep motion control close to the power electronics for fast response during coordinated axis movement.

It provides ±10 V differential scaling on each of its 2 analog inputs, allowing external speed or torque references to be wired directly. There are 2 analog outputs that broadcast internal values such as motor current or axis position for process monitoring. Discrete control is managed by 14 digital inputs rated for 24 V logic and by 8 configurable digital I/O points that can switch direction through software. These resources integrate limit switches, start commands, or fault resets without supplementary interface cards, streamlining cabinet layout and reducing wiring complexity. The mix of analog and digital channels supports direct connection to common field devices while keeping signal handling inside the drive platform.

There are 4 probe inputs that latch encoder positions at the moment of an external event for print-mark or registration applications. Drive communication across the Multi-Ethernet interface is refreshed every 500 µs communication cycle, while torque is corrected within a tight 125 µs current control cycle. Speed regulation is recalculated at a separate 250 µs velocity control cycle before being passed to the position loop. These deterministic intervals align with the dual Safe Motion Bus channels, the two Multi-Encoder interfaces, and up to four optional slots. The timing structure supports accurate event capture and stable loop updates when the axis is accelerating, decelerating, or synchronizing with external machine actions.