EncoderWorks provides a custom compatible replacement solution for 549855-01 RHA 607 focused on maintaining PROFIBUS DP communication behavior, M12 connector integration, and Ø12 mm blind hollow shaft mechanical compatibility. The replacement challenge is not only matching the 13-bit absolute position output, but also preserving bus communication structure, controller-side parameter interpretation, and stator coupling installation conditions. A PROFIBUS encoder may appear online while incorrect wiring, addressing, or mechanical adaptation still affects reliable position feedback.
System Limits
The primary PROFIBUS replacement boundary is maintaining consistent communication between the encoder and the controller. The 549855-01 RHA 607 uses PROFIBUS DP output with 13-bit singleturn resolution. Bus signal assignment, controller parameter configuration, and position data interpretation must be matched because successful network communication does not always guarantee correct position evaluation.


The mechanical integration boundary includes hollow shaft fit, stator coupling, and connector arrangement. This model uses a Ø12 mm blind hollow shaft with a 58/59 flange and stator coupling structure, together with three M12 connectors for bus input, bus output, and power supply. Shaft engagement, coupling alignment, connector installation, shielding, and grounding continuity should be maintained because mechanical mismatch or electrical interference can affect long-term feedback reliability.
Wiring & Installation
The PROFIBUS interface requires verification of M12 bus input, bus output, and power supply connections. The configuration uses separate M12 connectors with A/B bus signals, VP, DGND, chassis connection, and power terminals. Incorrect connector mapping, poor shield continuity, or improper grounding may result in unstable communication, intermittent field faults, or extended commissioning time.
During replacement installation, the Ø12 mm blind hollow shaft and stator coupling interface should be checked against the existing machine structure. M12 connector orientation, cable routing, vibration conditions, and environmental protection requirements should be considered together to maintain reliable PROFIBUS operation in industrial applications.
Custom Compatible Solution
- Match PROFIBUS DP communication behavior and controller-side position data interpretation.
- Preserve 13-bit singleturn position structure and feedback consistency.
- Adapt Ø12 mm blind hollow shaft, 58/59 flange with stator coupling, and three M12 connector requirements.
- Validate PROFIBUS wiring, shielding, grounding, and field commissioning conditions.
Typical production lead time: 15 working days.
Key Data
| Parameter | Specification |
|---|---|
| Model | 549855-01 RHA 607 |
| Encoder Type | Absolute Singleturn Encoder |
| Interface | PROFIBUS DP |
| Resolution | 13 bit Singleturn |
| Shaft Type | Ø12 mm Blind Hollow Shaft |
| Flange Type | 58/59 Flange with Stator Coupling |
| Connection | 3 × M12 Connectors |
| Supply Voltage | 9–36 VDC |
| Protection | IP67 / IP64 |
| Main Replacement Focus | PROFIBUS parameter matching, M12 integration, and hollow shaft adaptation |

