EncoderWorks can configure PVM78E-021KRR0BI-1212 as a custom compatible replacement solution for explosion-proof PROFIBUS DP multiturn feedback where node address, bus termination, 24-bit position structure, KR terminal-compartment wiring, and Ø12 mm clamping-flange coupling must remain aligned with the installed PLC project. The failure boundary is not only the 10–30 VDC supply, but also GSD compatibility, Class 2 scaling, preset behavior, counting direction, Bus IN / Bus OUT A/B polarity, PE grounding, shield continuity, stainless housing fit, and explosion-proof certificate scope. Typical production lead time: 15 working days.
This model is used where the controller reads absolute multiturn position over a PROFIBUS DP network from a solid-shaft encoder with a clamping flange and a radial KR terminal compartment. A compatible replacement must preserve the 12-bit singleturn and 12-bit multiturn position structure, binary code behavior, address setting, termination logic, terminal mapping, Ø12 mm shaft interface, stainless housing boundary, and hazardous-area installation requirement.
System Limits
The first system boundary is the PROFIBUS DP configuration. PVM78E-021KRR0BI-1212 must appear to the PLC as the same PROFIBUS encoder device with the correct node address, GSD file behavior, Class 2 parameter structure, scaling function, preset function, counting direction, diagnostic response, and 24-bit position expectation. If the replacement is installed with the wrong address, different scaling, incorrect preset behavior, mismatched direction, or an incompatible parameter set, the bus may still detect a device while the axis reports wrong position, reversed travel, incorrect multiturn value, or unstable commissioning diagnostics.
The second boundary is the KR terminal compartment and stainless clamping-flange installation. Bus IN and Bus OUT A/B polarity, supply reference, GND, PE, shield path, terminal-resistor status, cable-gland sealing, and the stopping plug must remain consistent with the field wiring. A correct encoder can still fail if the terminal resistor is enabled at the wrong point, the outgoing bus is interrupted, A/B is reversed, the shield is terminated with high impedance, or the gland and stopping plug do not preserve the sealing boundary. Mechanically, the Ø12 mm × 25 mm solid shaft, clamping flange, coupling alignment, axial load, radial load, and stainless housing fit must be checked together.
Wiring & Installation
Before replacement, confirm the full installed model code, PROFIBUS node address, GSD requirement, singleturn and multiturn bit structure, Class 2 scaling use, preset requirement, counting direction, diagnostic mapping, KR terminal layout, radial cable-entry direction, terminal-resistor position, and stainless housing requirement. This KR version should not be inferred from K2, K5, or DR cable variants because the terminal-compartment wiring, gland sealing, stopping plug, and shield termination boundary are different.
During installation, verify Terminal 1 / 2 supply wiring and Bus IN / Bus OUT A/B assignment before powering the system. Keep the PROFIBUS cable away from motor and drive wiring, maintain large-surface shield continuity, and avoid cable kinking, tensile load, or shearing load at the cable gland. The clamping flange should seat flat, and the coupling should not force the Ø12 mm shaft off center. Explosion-proof suitability must be confirmed against the installed hazardous-area requirement and certificate scope before shipment.
Custom Compatible Solution
- Match PROFIBUS DP behavior, 12-bit singleturn plus 12-bit multiturn feedback, binary code, node address, and Class 2 parameter expectations
- Preserve GSD compatibility, scaling, preset, counting direction, diagnostic behavior, Bus IN / Bus OUT A/B mapping, PE, and shield continuity
- Adapt the Ø12 mm × 25 mm solid shaft, clamping flange, KR terminal compartment, stainless housing, cable gland, stopping plug, and IP66 sealing boundary
- Review bus termination, terminal grounding, cable route, coupling alignment, shaft load, hazardous-area certificate scope, and commissioning requirements before shipment
Key Data
| Item | Data |
|---|---|
| Model | PVM78E-021KRR0BI-1212 |
| Encoder type | Explosion-proof absolute multiturn rotary encoder |
| Interface | PROFIBUS DP |
| Profile | PROFIBUS encoder profile 3.062, Class 1 / Class 2 |
| Supply voltage | 10–30 VDC |
| Output code | Binary |
| Singleturn resolution | 12 bit |
| Multiturn resolution | 12 bit |
| Total position structure | 24-bit absolute multiturn data |
| Connection | KR, terminal compartment with 1 cable gland and 1 stopping plug |
| Cable exit | R, radial |
| Shaft / flange | Ø12 mm × 25 mm solid shaft, clamping flange |
| Housing material | I, INOX stainless steel |
| Protection class | IP66 sealing boundary requires confirmation against installed version |
| Hazardous-area boundary | ATEX / IECEx explosion-proof compliance requires confirmation against installed certificate scope |
| Key replacement checks | Node address, bus termination, GSD file, Class 2 scaling, preset, direction, Bus IN / Bus OUT A/B, PE, shield continuity, KR terminal sealing, Ø12 mm clamping-flange coupling |
