EncoderWorks supports AVS78E-011KRR0GI-0016 with a custom compatible replacement solution for explosion-proof SSI singleturn feedback where RS422 clock/data timing, 16-bit Gray code interpretation, KR terminal-compartment mapping, preset input, counting-direction input, INOX grounding, and Ø10 mm clamping-flange coupling must remain aligned with the installed controller. The failure boundary is not only the 10–30 VDC supply, but also Pulse ± polarity, Data ± polarity, monoflop timing, clock pause, controller sampling edge, shield continuity, terminal sealing, and explosion-proof certificate scope. Typical production lead time: 15 working days.
This model is used where the controller reads a high-resolution singleturn absolute position word through an SSI interface from a solid-shaft encoder with a radial KR terminal compartment and stainless housing. A compatible replacement must preserve the 16-bit Gray output word, SSI clock response, RS422 differential wiring, zero-set behavior, direction input logic, terminal assignment, Ø10 mm shaft interface, clamping-flange fit, and hazardous-area installation boundary.
System Limits
The first system boundary is the SSI timing and 16-bit Gray-code word structure. AVS78E-011KRR0GI-0016 must return the same 16-bit position value when the controller sends its clock sequence. If the replacement is supplied with Binary code, a 12-bit or 13-bit word, incorrect MSB / LSB handling, wrong sampling edge, insufficient clock pause, or mismatched monoflop behavior, the RS422 signals may still look stable while the controller calculates the wrong angle. Typical failures include fixed position offset, one-bit shift, unstable zero position, reversed direction, or incorrect value after preset.
The second boundary is the KR terminal compartment, INOX grounding, and Ø10 mm clamping-flange installation. Pulse + / Pulse -, Data + / Data -, GND, supply, preset, counting direction, shield path, cable-gland sealing, stopping-plug sealing, stainless housing bonding, and radial terminal clearance must match the installed wiring. A correct SSI encoder can still fail if the clock pair is reversed, the data pair is reversed, the preset line is triggered unintentionally, the direction input is held in the wrong state, the shield is terminated with high impedance, or the KR sealing boundary is not preserved. Mechanically, the Ø10 mm × 20 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, SSI bit length, Gray code requirement, controller clock frequency, monoflop timing, clock pause, Pulse ± terminal mapping, Data ± terminal mapping, preset input use, counting-direction input state, KR terminal layout, radial cable-entry direction, cable-gland size, stopping-plug condition, INOX housing requirement, and Ø10 mm shaft interface. This KR terminal version should not be inferred from K2, K5, aluminum-housing, axial cable, servo-flange, PROFIBUS, or other interface variants because the controller depends on clock/data timing rather than fieldbus addressing or network parameterization.
During installation, verify supply wiring, GND, differential clock pair, differential data pair, preset line, and counting-direction line before powering the system. Keep SSI wiring away from motor and drive wiring, maintain low-impedance shield and housing 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 Ø10 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 SSI RS422 behavior, 16-bit singleturn feedback, Gray output code, monoflop timing, and controller clock expectation
- Preserve Pulse ±, Data ±, supply, GND, preset input, counting-direction input, shield continuity, KR terminal assignment, and INOX grounding
- Adapt the Ø10 mm × 20 mm solid shaft, clamping flange, KR terminal compartment, stainless housing, cable gland, stopping plug, and IP66 sealing boundary
- Review clock frequency, line length, sampling edge, terminal sealing, housing bonding, coupling alignment, shaft load, hazardous-area certificate scope, and commissioning requirements before shipment
Key Data
| Item | Data |
|---|---|
| Model | AVS78E-011KRR0GI-0016 |
| Encoder type | Explosion-proof singleturn absolute rotary encoder |
| Interface | SSI |
| Electrical standard | RS422 |
| Supply voltage | 10–30 VDC |
| Output code | Gray |
| Singleturn resolution | 16 bit |
| Multiturn resolution | Not applicable |
| Total position structure | 16-bit absolute singleturn data |
| SSI timing boundary | Monoflop time and clock pause require controller-side confirmation |
| Connection | KR, terminal compartment with 1 cable gland and 1 stopping plug |
| Cable exit | R, radial |
| Control inputs | Zero-set / preset and counting direction |
| Shaft / flange | Ø10 mm × 20 mm solid shaft, clamping flange |
| Housing material | I, stainless steel 1.4404 / AISI 316L |
| 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 | SSI clock frequency, Pulse ±, Data ±, Gray code, 16-bit word length, preset, direction input, shield continuity, KR terminal sealing, INOX grounding, Ø10 mm clamping-flange coupling |
