ELECTRONIC BRAKE/LVCMOTOR STARTER

CONTROL UNIT

INTRODUCTIONThe electronic brake/LVC starter control unit offers the features of a motor starter and anelectronic brake in one package.

The motor starter offers no-voltage, low voltage, and motor overload protection. The electronicbrake provides a means for stopping a cutterhead quickly and safely without motor windingdamage, excessive heat generation or mechanical wear.

SAFETY RULES1. Read and understand Instruction Manual before installing or adjusting control unit.

2. Re-check all wiring connections before energizing brake.

3. Make sure that guards are in place and saw blade is properly tightened with special lockingnut provided (Radial Arm Saws).

4. Be sure that proper electronic power module is installed for the machine application.

5. Do not adjust brake stopping time below recommended minimum stopping time.

6. Warning: Shock hazard - do not contact exposed wiring while adjusting brake.

7. Installing and servicing should always be accomplished by qualified electrical personnel.

8. Operate the machine only with the cover of the brake/starter in place.

9. Do not operate the machine unless the brake/starter is properly grounded as specified inthe manual.

10. Occasionally inspect the brake/starter to ensure that it is securely mounted, clean, and dry.

11. Operate the brake/starter only with an electrical fuseable disconnect switch.

Dated 1-17-91 Part No. 424-04-651.0009ODelta International Machinery Corp. 1991

@

ffi$!4ffico"{I

ozEtrzC:

r

SINGLE PHASE ELECTRONIC BRAKE/LVC MOTOR STARTER CONTROL UNITFig. 1, il lustrates the standard single phase electronicbrake/LVC motor starter control unit. Delta Cat. No. 52-707.

The control unit consists of two major sub-assemblies: astandard single phase LVC motor starter which is wired toan electronic brake control panel.

The electronic circuitry which controls the motor braking timeis mounted above the LVC starter on brackets. By removingthe two screws, (A) Fig. 1, the electronic brake panel canbe swung away on the hinge to gain access to the LVC motorstarter. Fig. 2, shows lhe 52-707 brake/starter with theelectronic brake panel swung open.

Fig. 3, shows a schematic diagram of the single phaseelectronic brakellVC starter.

Other than the electronic brake fuse and the insulated brakeadjustment screwdriver, there are no user serviceable partson the electronic brake assembly panel, 500-84-001-7024.The brake panel consists of the electronic pr inted circui tboard, the power devices, the switching relay, and the adjust-ment screwdriver al l mounted in the aluminum base. Theelectronic brake assembly panel also includes the eightconductor, mult i -color wir ing assembly for wir ing the braketo the motor starter.

ELECTRONIC BRAKE FUSE584-OO-O37-OOO1

ELECTRONIC BRAKEASSEMBLY PANEL500-84_001-7024

INSULATED BRAKEADJ USTM ENT SCR EWDR IVER

533-OO-O01-2417

FIG 1 - STANDARD SINGLE PHASE ELECTRONIC BRAKE/LVCMOTOR STARTER CONTROL UNIT. ' :DELTA CAT. NO. 52.707.

U

\-,

FIG. 2 - CAT. NO. 52.707, SINGLE PHASE ELECTRONILBRAKE/LVC MOTOR STARTER CONTROL UNIT.

FrG. 3 - SCHEMATTC DIAGRAM OF THE CATALOG NO. 52-707, $INGLEPHASE ELECTRONIC BRAKE/LVC STARTER CONTROL UNIT.

CONTROL TRANSFORMER4 3 8 - 0 1 - O 1 9 - 0 O 1 2

ELECTRONIC BRAKEASSEMBLY PANEL500-84-001-7024

INTERLOCKSWITCH

577-OO-OO1-0262

CONTACTOR583-OO-OO1-OO66

OVERLOAD RELAY584-OO-OO2-OO38

CONTROLTRANSFORMER

FUSE584-00-001-0039

i"-III

_J

=#;;;-8LACK-i-wHtrE-i-GRAV-

l - - '

-_l

ELECTRONICBRAKE

ASSEMBLYPANEL

500-84-001-7024

l ; '-+--..@ |

? lcnotno I

t " , t r , !CC'PPEN I

WNE OI{LY \CONTROL STATION

(-

INSTRUCTIONS FOR CONNECTING THE SINGLE PHASEBRAKE/STARTER TO

Remove two screws, (A) Fig. 1, from the left bracket of thebrake/starter assembly. Swing the brake panel into the openposition as shown in Fig. 4.

Terminals 1 ,2 and 3, Fig. 4, are used for wiring the start/stoppushbutton switch to the brake/starter. Terminals T1 and T2,Fig. 4, are used for wiring the motor to the brake/starter. Theground wire from the start/stop switch and the ground wirefrom the motor should each be connected to a separatescrew of the ground strip

The start/stop pushbutton and the motor are factory wiredto the electronic brake/LVC motor starter. The end user onlyneeds to wire single phase power to the brake/starter.

To wire the brake/starter with single phase power, bring thepower lead through the entrance hole in the bottom of theenclosure, Fig. 5. Connect the black power lead to terminalL1, the white power lead to terminal L2, and the green groundlead to the ground strip.

After the single phase power connections have been made,swing the brake panelback to its original position and securewith the two sheet metal screws (A) Fig. 1.

THE POWER SUPPLYSeveral points must be stressed and closely followed whenconnecting input power to the brake/starter unit:

1. To preserve the dust-tight integrity of the motor starter, Jan oil{ight box connector should be used for fastening theinput cable to the starter enclosure at the entrance hole.

2. lf copper stranded wires are used for the input leads, thewires must be soldered, dipped or tinned before they areconnected to terminals L1 and L2 and the ground strip.

3. The wires must be connected to terminals L1 and L2through the front face of the terminal block as shown in Fig. 5.The screws on the top of the terminal block are used forclamping the wires in the terminal block.

4. The ground strip has provisions for four ground leads.The input power, start/stop station, and motor wires mustnever be inserted in the ground strip under one screw.

5. lf metal conduit is used in place of cable, the greenground wire from the single phase input power system isomitted.

J

FIG. 4

FIG. 54

THREE PHASE ELECTRONIC BRAKE/LVC MOTOR STARTER CONTROL UNITFig. 6, illustrates the standard three phase electronic board, the power devices, the switching relay, and the adjust-brake/LVC motor starter control unit, Delta Cat. No. 52-703. ment screwdriver all mounted on the aluminum base. The

electronic brake assembly panel also includes the eight( Other than the electronic brake fuse and the insulated brake conductor, multi-color wiring assembly for wiring the brake\" adjustment screwdriver, there are no user serviceable parts to the motor starter.

on the efectronic brake assembly panel, 5OO-84-OO1-7024.The brake panel consists of the electronic printed circuit (Continued on next page)

FIG. 6 - STANDARD THREE PHASE ELECTRONIC BRAKE/LVC MOTORSTARTER CONTROL UNIT. DELTA CAT. NO. 52.703.

[':I

I

ELECTRONIC BRAKE FUSE584-OO-O37-OOO1

ELECTRONIC BRAKEASSEMBLY PANEL500-84-001-7024

INSULATEDADJUSTMENT SCREWDRIVER

533-OO-OO1-2417

The control unit consists of two major sub-assemblies: astandard three phase LVC motor starter which is wired toan electronic brake control panel.

The electronic circuitry which controls the motor braking timeis mounted above the LVC starter on brackets. By removingthe two screws (A) Fig. 6, the electronic brake panel can

be swung away on the hinge to gain access to the LVC motorstarter. Fig. 7, shows the 52-703, brake/starter with the elec-tronic brake panel swung oPen.

Fig. 8, shows a schematic diagram of the three phase elec-tronic brake/LVC starter. )r'--/

FIG. 7 - CAT. NO. 52.703, THREE PHASE ELECTRONICBRAKE/LVC MOTOR STARTER CONTROL UNIT

FIG. 8 _ SCHEMATIC DIAGRAM OF THE CATALOG NO. 52.703, THREEPHASE ELECTRONIC BRAKE/LVC STARTER CONTROL UNIT

C O N T R O L T R A N S F O R M E R438-01-019-OO30

ELECTRONIC BRAKEASSEMBLY PANEL500-84-001-7024

CONTACTOR583-OO-OO1-OO56

OVERLOAD RELAY584-OO-OO2-OO38

C O N T R O LT R A N S F O R M E R

F U S E584-00-001 -0039

-l t.-- l

cor{fiEcYAs PCR tnE I

VOLTAGE I IIIIIIIII

_ lnEq----.|

ELECTRONICBRAKE

ASSEMBLYPANEL

500-84-001-7024BLUE

BLACX-1wxtIE-.'|

L r L z L 3 r ? 3 1J_ l_ l_ r_ l_ : -_ -- - . . : - - ' | - -1 * - l - -

$l:: hrrJ'{' rictfrEi sroP srAnr

coNrno|. sr rloN

INSTRUCTIONS FOR CONNECTING THE THREE PHASEBRAKE/STARTER TO

Remove two screws, (A) Fig. 6, from the left bracket of thebrake/starter assembly. Swing the brake panel into the openposition as shown in Fig. 9.

Terminals 1,2, and 3, Fig. 9, are used for wiring the starUstoppushbutton switch to the brake starter. Terminals T1,T2,T3,Fig. 9, are used for wiring the motor to the brake/starter. Theground wire from the start/stop switch and the ground wirefrom the motor should each be connected to a separatescrew of the ground strip.

The start/stop pushbutton and the motor are factory wiredto the electronic brake/LVo motor starter. The end user onlyneeds to wire three phase power to the brake/starter.

To wire the brake/starter with three phase power, bring thepower lead through the entrance hole in the bottom of theenclosure, Fig. 10. Connect the red-white-black power leadsto terminals L1-L2-L3 and the green ground lead to theground strip.

The directional rotation of the motor can be reversed by inter-changing any two of,the three input power leads in terminalsL1-L2-13.

WARNING: Check voltage to ground of each power leg.lf a "high leg" is found, be certain to connect it to ter-minal L3. Failure to do so can result in damage to theElectronic Brake.

THE POWER SUPPLYAfter the three phase connections have been made, swingthe brake panel back to its original position and secure withtwo sheet metal screws (A) Fig. 6.

Several points must be stressed and closely followed whenconnecting input power to the brake/starter unit.

1. To preserve the dust-tight integrity of the motor starter,an oil{ight box connector should be used for fastening theinput cable to the starter enclosure at the entrance hole.

2. lf copper stranded wires are used for the input leads, thewires must be soldered, dipped or tinned before they are con-nected to terminals L1-L2-L3 and the ground strip.

3. The wires must be connected to terminals L1-L2-L3through the front face of the terminal block as shown in Fig.10. The screws on the too of the terminal block are used forclamping the wires in the terminal block.

4. The ground strip has provisions for four ground leads.The input power, start/stop station, and motor must begrounded via the ground strip. Two ground wires must neverbe inserted in the ground strip under one screw.

5. lf metal conduit is used in place of cable, the greenground wire from the three phase input power system isomitted.

FIG. 9

\-

FIG.7

1 0

ELECTRONIC BRAKEFig. 11, shows the components of the LVC/brake combina-tion unit which must be used to properly adjust the brake fora particular machine and operating voltage.

Verify that the voltage rating of the module is the same asthe input power system voltage.

l

The available modules

MODULECATALOGNUMBER

52-7'�|152-71252-71352-714

are shown in the following Table:

VOLTAGERATING

120200-240400-480

575

MODULECOLORBLACKBLUE

GREENRED

PLUG-INBRAKE

M O D U L E

TOROUE CONTROLPOTENTIOM ETER

BRAKE TIME CONTROLPOTENTIOM ETER

INSULATEDBRAKE

ADJUSTMENTSCREWDRIVER

FtG. 11I

The plug-in brake module is installed for factory wired units.For field mounted units it will be necessary to instalt the plug-in brake module as shown in Fig. 12.

Before applying power to the LvC/brake combination unitadjust the brake time and torque to minimum by insertingscrewdriver in the time and torque potentiometers and turningcompletely counterclockwise, Fig. 13. The potentiometer willstop turning when MIN is reached.

Apply power to the LVC/brake combination unit. Jog themotor to verify proper rotational direction of this motor. lf itis necessary to reverse motor rotation, interchange any twoof the three input power leads (L1-L2-L3).

PLUG-IN BRAKE MODULE

FrG. 12

BRAKE TIME CONTROL

FrG. 13

ADJUSTING THE ELECTRONIC BRAKEWARNING: SHOCK HAZARD EXISTS. DO NOT CONTACTEXPOSED WIRING WHILE ADJUSTING BRAKE.

Use the insulated screwdriver to turn the brake time controlpotentiometer untilthe indicator points to the desired numberof seconds for blade stopping time' The following chartshould be used to determine the safe stopping time for RadialArm Saws.

RECOMMENDED MINIMUMSTOPPING TIME

20 sec18 sec16 sec14 sec

BLADEslzE20,18'1 6 "14"

Turn the machine on and let it obtain full speed and operatingtemperature. Press the stop button and when indicator lightFig. 14, lights up, turn torque control, Fig. 14, clockwise untilyou hear the brake start to activate. lf you do not hear thebrake start to activate, repeat turning the machine on andoff, and turning torque control clockwise when light is on'untilthe brake activates and stops the blade. Once you haveobtained this point, listen after the blade stops for the "hum"

of the motor. ldeally the motor should "hum" for about onesecond after the blade stops. This will insure that the bladewill stop in the required number of seconds after the machineis turned off. lf the motor "hums" longer than one secondafter the blade stops, turns the machine on and off againwhen the indicator light lights up, turn torque controlcounter-clockwise. Continue this procedure until you have approxi-mately one second "hum" of the motor after the blade stops'

FIG.

1 0

--)

INDICATOR LIGHT

TOROUE CONTROL

1 4

I

^1 trIELTAPARTS, SERVICE OR WARRANTY ASSISTANCE

All Delta Machines and accessories are manufactured tohigh quality standards and are serviced by a networkof factory service centers and authorized service stationsl isted in your owner 's manual. To obtain addit ional ' infor-

mation regarding your Delta quality product or to obtainparts, service or warranty assistance, please call or faxDelta 's tol l - f ree'hot l ine' number.

oALABAMAiBirminghan 35209Porter-Cable Corporation131 W. Oxmoor Rd.Suite 105205-942-6325

CALIFORNIACity of Industry 91745PorterCable Corporation1305 John Reed Court81 8-333-3566

San Leandro 94577PorterCable CorPoration3039 Teagarden StreetP.O. Box 1913415-357-9762

COLORADODenver 80204Porter-Cable Corporation2561 West 8th Ave.303-892-61 1 3

FLORIDAHialeah 33014Porter-Cable Corporation16373-75 NW 57th Ave.305-624-2523

Orlando 32803PorterCable Corporation1807% Winter Park Road407-644-81 00

MICHIGANGrand Rapids 49508Portercable CorPoration3755 G Broadmoor S.E.Broadmoor Business Center61 6-949-9040

SouthJield (Detroit) 48075Porter-Cable Corporation18650 W. Eight Mile Road31 3-569-4333

MINNESOTAMinneapolis 55429PorterCable Corporation4315 68th Avenue North6 1 2-561-9080

MtssouRlNorth Kansas City 6a116PorterCable Corporation1141 Swift AvenueP.O. Box 12393816-221-2070

St.Louis 63119Porter-Cable Corporation7574 Watson Boad31 4-968-8950

NEW JERSEY

Union 07083PorterCable Corporation945 Ball Avenue201 -964-1 730

NEW YORKFlushing 11365Porter-Cable Corporation175-25 Horace Harding

Expressway212-225-2040

NORTH CAROLINACharlotte 28209Porter-Cable Corporation4303B South Boulevard704-525-4410

oHtoColumbus 43215Porter-Cable Corporation4560 Indianola Avenue61 4-263-0929

Valley View 44125Porter-Cable CorporationSweet Valley Bustness ParkUn i t #18216-447-9030

PENNSYLVANIAPhiladelphia 19154Porter-Cable Corporation-,12285 McNulty Road215-677-7800Fax No.: 215-677-9908

RHODE ISLANDProvidence 02914Porter-Cable. Corporatton1009 Waterman Avenue401-434-3620

TEXASDallas 75220Porter-Cable Corporation'10714 N. Stemmons FreewaY21 4-353-2996

Houston 77092Porter-Cable Corporatton5201 Mitchelldale, Suite B-971 3-682-0334

WASHINGTONRenton 98055Porteroable CorPoration268 Southwest 43rd Street206-251 -6680

WISCONSINMilwaukee 53222Porter-Cable Corporation10700 W. Burleigh Street414-774-3650

Delta maintains a modern,efficient Parts DistributionCenter, maintaining aninventory of over 15,000parts located in Memphis,Tennessee.

Highly qual i f ied and exper-ienced Customer ServiceRepresentatives are stand-ing by to assist iYou'onweekdays from 8:00 A.M to5:00 P.M. MemPhis t ime.

Memphis, TN 381184290 Raines Road

Phone: (901) 363-8800'

IJCIEF&INIE800-223-PART

FAX: 800-535-6488

FACTORY SERVICE CENTERS

Tampa 33609Porter-Cable Corporation4536 W. Kennedy Blvd.8 1 3-877-9585

GEORGIAForest Park 30050Porter-Cable Corporation4017 Jonesboro Road40+363-8000

tLLtNOtSAddison (Chicago) 60101Porter-Cable Corporation311 Laura Drive31 2-628-61 00

MARYLANDBallimo(e 21227Porter-Cable Corporation7397 Washington Blvd.Suite #102301-799-9394Fax: 301-799-9398

MASSACHUSETTSBoston (Allston) 02134Porter-Cable Corporation414 Cambridge Street617-782-1700

2-' t 5-91