ABB LDGRB‑01 Gray Code Position Encoder Interface Board, For Large‑Drive & Excitation System Shaft Position Feedback

Description

ABB LDGRB‑01 Gray Code Position Encoder Interface Board, For Large‑Drive & Excitation System Shaft Position Feedback

Product Details

LDGRB‑01, part number 3AFE61320954, is ABB gray‑code (binary‑gray) encoder interface board, widely used in large‑power drives and Unitrol generator excitation cabinets for rotor/shaft angle‑position acquisition。Origin: Sweden/Germany. Lifecycle status: EOL discontinued, OEM new production terminated; market supply includes NOS surplus and fully‑tested refurbished spare‑parts.

‑ Function: Gray code parallel signal decoding, converts shaft multi‑bit gray‑code encoder position signal into digital data for controller ‑ Signal type: Parallel multi‑bit gray‑code input (shaft angle / rotor position feedback) ‑ Power supply: 5 VDC, low power consumption ‑ Interface: On‑board terminal block for gray‑code encoder wiring; internal bus interface to host controller ‑ Application platform: Large ABB drives, Unitrol 5000 / 6000 excitation cabinets (rotor position measurement) ‑ Mounting: Plug‑in card for cabinet sub‑rack ‑ Operating temperature: ‑20℃ ~ +70℃, humidity 5‑95 % non‑condensing, IP20 cabinet‑installation ‑ Weight: approx 0.35 kg

Applications

‑ ABB Unitrol static‑excitation system: generator rotor angle / position feedback acquisition ‑ Large‑power synchronous motor drive system shaft‑position measurement ‑ Heavy‑industry metallurgy rolling‑mill main‑drive position feedback ‑ Retrofit & spare‑part replacement for existing LDGRB‑01 installations in excitation & large‑drive cabinets ‑ Spare inventory for power‑plant and heavy‑industry electrical maintenance department

LDGRB-01 3BSE013177R1

Related Series Models (6+)

1. 3AFE61320954 (ABB official order part‑number for LDGRB‑01)
2. PPD113B01‑10‑150000 (AC800PEC excitation main controller)
3. SCYC55830 SN1170020EL (Unitrol thyristor power stack)
4. UNS series interface boards for Unitrol cabinet
5. PPD115A (higher‑performance AC800PEC controller)
6. UF D128 (AC800PEC digital I/O expansion module)
7. Resolver‑to‑digital alternative interface modules

Key Features

1. Dedicated gray‑code encoder interface board, decodes parallel gray‑code position signals for shaft / rotor angle‑position measurement.
2. Industrial‑grade signal conditioning, anti‑interference design suitable for high‑EMI power‑conversion cabinet environment.
3. Compact plug‑in form factor for sub‑rack installation inside Unitrol excitation or large‑drive cabinets.
4. Receives multi‑bit parallel position signal from shaft encoder, transfers decoded position data to host controller via internal bus.
5. Continuous self‑diagnosis for input signal loss and hardware fault, fault status available via controller diagnostics.
6. Critical for excitation system rotor‑position dependent functions such as field‑current commutation and synchronisation logic.
7. Terminal‑block wiring for encoder field connection, easy maintenance and commissioning.
8. Manufactured in Sweden/Germany; EOL obsolete, only NOS or fully‑tested refurbished spare‑parts available.

Main Functions

1. Receive parallel gray‑code signals from shaft‑mounted gray‑code encoder, decode to real‑time rotor angle / position digital values.
2. Transmit decoded shaft‑position data to AC800PEC (PPD113Bxx) excitation controller for excitation commutation and synchronisation control.
3. Signal conditioning and galvanic isolation for encoder input signals, suppress cabinet‑borne EMI interference.
4. Detect encoder signal loss / hardware fault and report diagnostic alarms to host controller.
5. Provide accurate rotor‑position feedback essential for proper operation of synchronous‑generator static‑excitation control.
6. Cooperate with shaft encoder, excitation controller and thyristor power stack to complete generator excitation closed‑loop regulation.
7. Serve as gray‑code position‑feedback interface unit inside ABB Unitrol excitation cabinet.