Allen Bradley 1771KE

Вот详细description, technical specifications, part numbers and compatible modules for the Allen‑Bradley 1771-KE module.

1. Description

The Allen‑Bradley 1771‑KE is a single‑axis basic resolver module designed for the PLC‑5 family (1771 I/O chassis). It interfaces directly with resolver transducers to measure absolute angular position or linear displacement. The module provides 12‑bit resolution (4096 counts per revolution / “Word” output) and integrates with the 1771 backplane using block transfer (BTR/BTW) data transfer.

Key functional features:

• Converts resolver sine/cosine signals (traditional 4‑wire) absolute shaft position
• Self‑calibration and diagnostic checks (open/short detection, internal micro‑processor)
• Supports a 2‑/4‑speed resolver (pole pair ratio 1:1, 1:2, etc.)
• BTR (Block Transfer Read) carries measured position / status words once per scan
• Available analog output (0‑10 V, 4‑20 mA) not present; purely resolver‑to‑digital data
• Series D (latest version) includes improved electrostatic discharge (ESD) protection

All standard 1771 modules float on the 1771‑backplane +5 V / +15 V / –15 V. The unit fits one full slot.

2. Technical Specifications

| Parameter | Value | | --- | --- | | Compatibility | Allen‑Bradley PLC‑5 processors (1785‑L/B/C/E enhanced); Plug & Trust extension | | Resolver Type | DC tach‑fed resolver with continuous rotation | | Resolver Ratios | 1:1, 2:1, 4:1 (pole pairs: input V < ‑ L‑5‑kHz); single‑/multi‑speed modes | | Resolution | 12‑bit binary (<0.09° per bit), yes 4096 count/rev. one Word (16‑bit) | | Position update per scan | Input word count: none x feedback words per BTR 5 | | Data format | 4 B&B words (Word 0-3) → absolute: 2·’word 1 + MSBs0‑full range “fine/coarse/ intermediate” | | Multi‑speed / soft mode | Yes configurable via two jumpers | | Scan Sequence | One BTR per command item (Read Block Item Execution ~5 ms +5 backplane data )) | | Temperature | 0‑ 60°C operational | | Humidity | 5%‑95% (non‑condensing) | | Isolation | Transformer coupling (resolver side from backplane ),*** | | ~~Model no series A/R x***~~ Not written****