RELIANCE 0-52806-1 Tach Loss Overspeed Board

Technical Specifications

Model:0-52806-1（528061）

Brand:RELIANCE

Product type:Tach Loss & Overspeed Protection PCB Board

Weight:0.68kg

Dimension:220mm115mm25mm

Operating temperature:0℃ ~ 60℃

Storage temperature:-40℃ ~ +85℃

Relative humidity:5%~85%,non-condensing

Certification:CE

System compatibility

0-52806-1 belongs to RELIANCE CardPak series speed protection board.

Installed into CardPak DC drive rack,works with 490051 armature control board,490054 field regulator board and 518317 interface control board.

Receive tachometer pulse feedback signal for motor overspeed and tach signal loss detection.

Compatible with AutoMax control system for heavy industry production line.

Commonly used for old DC drive equipment maintenance and spare replacement.

Function

0-52806-1 is dedicated tach loss and overspeed protection PCB board for RELIANCE legacy DC drive system.

Real-time collect tachometer pulse signal from motor speed feedback device.

Detect tachometer signal loss fault when speed feedback signal missing.

Monitor motor actual speed,trigger overspeed protection once exceed preset threshold.

Onboard potentiometer for overspeed threshold calibration.

Built-in relay output for safety interlock,cut off SCR trigger signal when fault occurs.

Front panel reset button for manual fault reset after troubleshooting.

Two LED indicators for overspeed alarm and tach loss alarm status display.

Installation

Power off the whole CardPak drive rack and cut main power supply.

Insert 0-52806-1 board into designated slot of drive rack.

Fasten fixing screws.

Connect backplane edge connector and tachometer signal wiring.

Tachometer signal use shielded twisted pair and separate from high voltage power cable.

Power on system,adjust potentiometer to set overspeed threshold.

Test overspeed trip and tach loss protection function.

Interface

CardPak backplane edge connector,tachometer signal terminal,fault relay output port,overspeed calibration potentiometer,manual reset button,Overspeed / Tach Loss LED indicators.

Feature

RELIANCE 0-52806-1,CardPak speed safety protection printed circuit board.

Two core protection:tachometer signal loss detection and motor overspeed trip.

Front panel LED directly display fault type for quick troubleshooting.

Independent relay hardware interlock to realize safe drive shutdown.

Potentiometer adjustable overspeed setting to match different motor rating.

Standard CardPak plug-in structure,easy replacement.

Discontinued obsolete board,supply only for old automation drive system spare replacement.

Suitable for metallurgy,paper-making heavy-duty DC drive production line renovation.

Diagnostic

Overspeed false alarm:tach signal interference or threshold potentiometer drift;

Tach loss alarm:tachometer damaged or signal wire open circuit;

Protection relay no action:relay aging or board auxiliary power abnormal;

Cannot reset fault:fault condition still exist;

LED no lighting:board power supply failure.

Product Brief

RELIANCE 0-52806-1 is CardPak tach loss overspeed protection board.

It monitors motor tach feedback signal and triggers hardware safety interlock for overspeed and tach loss fault,widely used as spare part for heavy industry DC drive system maintenance.

Disclaimer

All parameters are for reference only and not the basis of quotation. Goods are scarce,overseas delivery lead time 3-7 working days. It is only used for equipment maintenance and retrofit.