When replacing EVM78E-011DRRPBI-1212, the important match is the lower 12-bit/12-bit absolute range inside the same PROFINET and Ex-rated mechanical platform; EncoderWorks can configure a custom compatible replacement solution around the existing GSDML project, Inox flameproof housing, DR terminal-compartment wiring, clamping flange, and ø10 mm shaft coupling. The main risk is installing a higher- or lower-range encoder that communicates correctly but changes scaling, preset behavior, or travel-limit logic. Typical production lead time: 15 working days.
This configuration belongs to the EVM78E PROFINET multiturn absolute encoder family. It combines 12-bit singleturn resolution, 12-bit multiturn range, 24-bit overall configured position capacity, binary output code, 10–30 VDC supply, flameproof 78 mm Inox 1.4404 housing, clamping flange, ø10 mm × 20 mm solid shaft, radial cable exit, and DR terminal compartment with two cable glands. Replacement work should focus on GSDML compatibility, device name, IP address, cyclic data layout, preset value, counting direction, IRT/RT cycle timing, cable-gland sealing, shield grounding, and whether the PLC project expects the 12-bit singleturn and 12-bit multiturn data range.
System Limits
The first system limit is PROFINET commissioning. Device name, IP address, GSDML file, update time, IRT or RT class, position data format, preset value, scaling, and counting direction must match the existing PLC project. If the replacement goes online with a different resolution or parameter layout, the network may appear normal while the machine receives the wrong position value.
The second limit is 24-bit range handling. This model uses 12-bit singleturn plus 12-bit multiturn feedback. It should not be configured like a 14-bit multiturn or 16-bit singleturn version, because wrap behavior, engineering-unit conversion, preset storage, and software travel limits will change.
The third limit is the Inox Ex housing with radial DR cable-gland entry. Cable-gland sealing, shield bonding, grounding path, coupling alignment, axial preload, and radial load must be controlled. Poor EMC practice or mechanical preload can produce intermittent PROFINET diagnostics, bearing stress, or repeatability drift.
Wiring & Installation
Before replacement, record the PLC hardware configuration, GSDML file, device name, IP address, IRT/RT setting, position format, preset value, scaling, counting direction, diagnostics, and terminal-compartment wiring. Confirm the two cable glands, cable diameter, sealing condition, shield termination, grounding path, and hazardous-area installation requirements.
During installation, align the ø10 mm shaft coupling without axial force and keep the clamping flange square to the mounting surface. Route Ethernet and power wiring away from inverter and motor cables, bond the shield with a low-impedance connection, and close the terminal compartment without damaging the sealing path. After startup, verify online status, 12-bit singleturn response, multiturn counting, direction, preset response, diagnostics, and repeatability over several machine cycles.
Custom Compatible Solution
EncoderWorks can configure the replacement around the installed PROFINET and mechanical system:
- Match 12-bit singleturn plus 12-bit multiturn binary absolute position behavior
- Preserve PROFINET device identity, GSDML compatibility, IRT/RT cycle timing, scaling, preset, direction, and diagnostics
- Adapt the Inox flameproof housing, clamping flange, ø10 mm solid shaft, radial exit, and DR terminal compartment with two cable glands
- Review cable-gland sealing, shield grounding, terminal mapping, EMC routing, coupling preload, hazardous-area limits, and 24-bit range scaling
Key Data
| Item | Data |
|---|---|
| Model | EVM78E-011DRRPBI-1212 |
| Encoder type | Absolute multiturn encoder |
| Interface | PROFINET |
| Resolution | 12-bit singleturn + 12-bit multiturn |
| Overall resolution | 24-bit configured range |
| Output code | Binary |
| Supply voltage | 10–30 VDC |
| Housing | Flameproof, Inox 1.4404 / AISI 316L |
| Flange | Clamping flange |
| Shaft | ø10 mm × 20 mm solid shaft |
| Connection | Radial terminal compartment, 2 cable glands |
| Protection | IP66 |
| Key checks | GSDML, device name, IP, IRT/RT cycle, 24-bit scaling, cable-gland sealing |
