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| Place of Origin | GERMANY |
| Brand Name | SIMENS |
| Certification | CE RoHS |
| Model Number | 6FC5211-0BA01-0AA4 |
Modern SINUMERIK CNC systems communicate with servo drives over digital fieldbuses — PROFIBUS DP, PROFINET, or DRIVE-CLiQ — exchanging speed setpoints, position feedback, and status signals digitally. But many machine tools in long production service still run servo drives and spindle amplifiers that accept only analog ±10V speed reference signals.
The ADI4 (Analog Drive Interface for 4 Axes) is the hardware bridge between these two worlds. It connects to the SINUMERIK CNC's PROFIBUS DP bus as a peripheral device. Over PROFIBUS, it receives the four axis position setpoints that the CNC calculates each interpolation cycle. It then converts each setpoint to an analog ±10V voltage output that the drive amplifier's speed reference input expects. Encoder feedback from the drives connects back to the ADI4's incremental encoder inputs, completing the position feedback loop through PROFIBUS to the CNC's position controller.
This architecture allows a SINUMERIK 840D (or other PROFIBUS-capable SINUMERIK control) to take full closed-loop position control over four analog-interface servo axes without any modification to the servo drives themselves. The CNC handles all interpolation and servo control; the ADI4 converts the digital commands to the ±10V signals the drives understand.
| Parameter | Value |
|---|---|
| Designation | ADI4 — Analog Drive Interface |
| Axes | 4 |
| Interface to CNC | PROFIBUS DP |
| Drive Interface | Analog ±10V (speed reference) |
| Firmware | 01.04.08 |
| Reference | A5E00182929 |
| Dimensions | 154.4 × 48.5 × 325 mm |
| Weight | 2.6 kg |
| Origin | Germany |
The ADI4 is not a simple D/A converter module — it implements motion control functionality on the PROFIBUS DP cycle. The SINUMERIK CNC treats the ADI4 as a standard PROFIBUS DP drive peripheral, exchanging setpoint and actual-value data each DP cycle. The ADI4 applies the velocity setpoints at its analog outputs and returns actual position values (derived from the encoder inputs) back to the CNC over PROFIBUS. The CNC's closed-loop position control operates at the standard interpolation rate, with the ADI4 providing the physical interface layer.
Compatible with both SINUMERIK 840D sl and the SIMOTION motion control platform over standard PROFIBUS DP. The firmware version (01.04.08 for the 0AA4 variant) determines feature set and compatibility with the specific CNC software version installed on the machine.
Retrofit of analog drives under SINUMERIK 840D: An existing machine tool with analog servo drives is upgraded to a SINUMERIK 840D CNC. The existing servo amplifiers and motors are retained; the ADI4 provides the interface between the new CNC's PROFIBUS bus and the drives' ±10V speed reference inputs.
Mixed-generation machine tool modernisation: A machining centre with four axes — two axes already running SINAMICS digital drives and two axes still on legacy analog amplifiers. The SINUMERIK CNC handles all four axes; the ADI4 interfaces the two analog axes while the SINAMICS drives connect digitally.
Multi-axis analog spindle and axis control: The ADI4's four channels handle three servo axes and one spindle analog amplifier simultaneously from one PROFIBUS peripheral position.
Q1: What type of encoder inputs does the ADI4 accept for position feedback?
The ADI4 accepts standard incremental encoder signals (TTL/HTL pulse trains, typically A/B/Z channel differential signals) from each axis. The encoder signals connect directly to the ADI4's encoder input terminals. The ADI4 feeds the counted position back to the CNC over PROFIBUS DP each interpolation cycle. Encoder resolution and supply voltage must be verified against the ADI4 hardware documentation for the specific encoder types installed on the machine.
Q2: How does the ADI4's firmware version affect compatibility?
Each firmware version (0AA1, 0AA2, 0AA3, 0AA4 variants correspond to firmware generations) may require a minimum SINUMERIK software version for correct operation. The 0AA4 variant with firmware 01.04.08 is the most recent generation and is compatible with current SINUMERIK 840D sl software. Earlier firmware versions (-0AA1, -0AA2) may not support all features available in newer CNC software versions. Confirm firmware compatibility against the machine's SINUMERIK version before ordering.
Q3: Can the ADI4 operate as a standalone position controller without the CNC?
No. The ADI4 is a PROFIBUS DP peripheral — its position setpoints and operating commands come from the SINUMERIK CNC or SIMOTION motion controller over the PROFIBUS bus. It has no standalone programme execution capability. The CNC must be operational and communicating over PROFIBUS for the ADI4 to generate its analog outputs.
Q4: What is the maximum PROFIBUS baud rate for the ADI4?
The ADI4 operates on the PROFIBUS DP bus at standard PROFIBUS baud rates up to 12 Mbit/s. The actual baud rate used in the machine's PROFIBUS network is set by the CNC configuration. Confirm from the machine's commissioning documentation or the ADI4 hardware manual the specific baud rate configuration for the installed system.
Q5: Is the 6FC5211-0BA01-0AA4 still available as a new product?
The ADI4 is listed under product cancellation status in the SINUMERIK product lifecycle documentation. It remains available through the CNC spare parts aftermarket — specialist SINUMERIK parts suppliers and tested surplus sources carry the ADI4 for maintenance of existing machine tool installations. Both the board part number (6FC5211-0BA01-0AA4) and the internal reference (A5E00182929) are useful search identifiers.
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