OHIO MODEL MC-A AUTO/MANUAL DROP MAGNET CONTROLLER DESCRIPTION Th MC-A Controllr is hvy duty mgnt ontrollr usd for mgnts whos old urrnt rngs from 20 A to 00 A d. Cold urrnt rfrns th urrnt flowing through th mgnt whn th mgnt tmprtur is 25 C throughout. AUTOMATIC DROP A rvrs urrnt djustmnt provids for fst, ln drop of th mgnt ovr omplt rng of mgnti mtril with on movmnt of th mstr swith or push utton. MANUAL DROP Allows for prtil dropping of th lod y ontrolling th mount of rvrs urrnt to th mgnt. A drop position on th mstr swith or push utton tht is spring rturnd to off, givs th oprtor omplt ontrol of th drop yl. INSTALLATION PROCEDURES INSTALLATION, MAINTENANCE, AND PARTS BULLETIN OPERATING RANGE 20-00 A (COLD MAGNET CURRENT) Mount th ontrollr to solid surf with th mounting rs providd. Th ontrollr must mountd vrtilly with th TOP up to oprt proprly. Mount th ontrollr wy from sours of ht nd dirt xhust of ngins. Allow nough room round th ontrollr for ir irultion. Rout ltril wirs through ottom of th nlosur nd onnt surly to th trminls. All ltril iruits must fr from grounds nd shorts. Rmov shipping mtril from th r shilds for oprting th ontrollr. Adjust th rvrs urrnt ontrol rhostt to provid nough rvrs urrnt to lnly drop th mgnt lod. Produr Strt with th dil st t low rng. Pik up nd drop lod of th mtril to hndld. If th mtril dos not ompltly fll off th mgnt, inrs th djustmnt nd try nothr lod. If th mtril drops off nd thn som jumps k up to th mgnt for it n fll fr, rdu th djustmnt nd try nothr lod. Whn ll th mtril flls lnly from th mgnt, th ontrollr is proprly st.
MC-A SUBASSEMBLIES 27 08B027X 27 59 d 79 72 7 27 33 08C026X 62 d 72 79 28 08BX 60 60 f g 90 00 d (COMPLETE ASSEMBLY) f g k m 55 08B6368E 3 h 2
55 2 95 29 08B2966Y r g d s 87 h 6 g k 87 p f u 6 q t 33 08C026X 08D3090C 35 3
OHIO MODEL MC-A AUTO/MANUAL DROP MAGNET CONTROLLER MC-A CONTROLLER EXPLODED ASSEMBLY VIEW 08C637A
MC-A HARDWARE PARTS LIST ITEM PART NUMBER REQ REQ REQ REQ REQ REQ DESCRIPTION A230 M230 0-230 A5 M5 0-5 ITEM PART NUMBER REQ REQ REQ REQ REQ REQ DESCRIPTION A230 M230 0-230 A5 M5 0-5 A-9008-2 FLATWASHER: 3/8 2 A-90025-02 CABLE CONNECTOR: #2 - #8 3 A-900228-0 RHEOSTAT DIAL A-900229-0 RHEOSTAT MOUNTING KIT 5 A-900232-2 RHEOSTAT:.0 Ω; 50 W 6 A-900233-02 RHEOSTAT KNOB 7 08A023X 2 2 2 2 2 2 BLOWOUT BOLT WITH STUD 8 08A02X 2 2 2 2 2 2 BLOWOUT BOLT 9 08A00C ARM PIN: φ0.5 in 2 mm 0 08A05F MAIN COIL: 230 V 0 08A05D MAIN COIL: 5 V 08A052X 2 2 2 2 2 2 INSULATING WASHER 2 08A05A CORE ASSEMBLY 3 08A037D 2 2 2 2 2 2 SHUNT ASSEMBLY 08A2A REVERSE FRAME ASSEMBLY 6 08A2623A ARM PIN 7 08A2637X SPRING WASHER 8 08A2720A 2 2 2 2 2 2 SHUNT ASSEMBLY 9 08A2866X CLAMP WASHER 20 08A2977X 3 3 3 3 3 3 SEPERATOR WASHER 2 08A300X 0 8 0 0 8 0 TERMINAL STUD 22 08A2673A REVERSE SWITCH CORE 22 08A3000X REVERSE SWITCH CORE 23 08A38A TERMINAL STUD: 2.5 in 65 mm 2 08A38X 2 2 2 2 2 2 TERMINAL STUD: 2.75 in 70 mm 25 08A3882X 2 3 2 2 3 2 TERMINAL STUD 26 08B06A MAIN FRAME 27 08B027X 2 2 2 2 2 2 BLOWOUT COIL ASSEMBLY: MAIN 27 08A025X 2 2 2 2 2 2 CONTACT TIP 28 08BX 2 2 2 2 2 2 BLOWOUT COIL ASSEMBLY: DROP 28 08A03X ARC SHIELD SIDE 28 08A3X 2 2 2 2 2 2 CONTACT TIP 28 08A503X 2 2 2 2 2 2 ARC SHIELD SPACER 28d 08A523X 2 2 2 2 2 2 DOWEL 28 08B2727X 2 2 2 2 2 2 BLOWOUT COIL ASSEMBLY 29 08B2966Y DIODE/HEATSINK ASSEMBLY 29 A-900565-8 HEAT SINK: DRILLED 29 A-900550-26 DIODE MODULE 29 08A2966Q 2 2 2 2 2 2 MOV SUPPRESSOR ASSEMBLY 30 08A2966Z CONTROL DIODE ASSEMBLY 3 08B6368E REVERSE SWITCH ARM ASSEMBLY 3 08A3X 2 2 2 2 2 2 CONTACT TIP 3 08A260A CONTACT BRACKET 3 08A2605A CONTACT BRACKET 3d 08B507B 2 2 2 2 2 2 CONTACT SHAFT ASSEMBLY 3 08A26X 2 2 2 2 2 2 CONTACT ARM ASSEMBLY 3f 08A2625X 2 2 2 2 2 2 REVERSE ARM SHAFT 3g 08A263X 2 2 2 2 2 2 CONTACT SPRING 3h 08B2596C SPACER WASHER 3k 08B268D REVERSE ARM SHAFT 3m 08B565B INTERLOCK ARM 32 08B685A REVERSE SWITCH COIL: AUTOMATIC 32 08A508J REVERSE SWITCH COIL: MANUAL 230 V 32 08A508C REVERSE SWITCH COIL: MANUAL 5 V 33 08C026X 2 2 2 2 2 2 ARC SHIELD ASSEMBLY: MAIN 33 08A020X BLOWOUT EAR 33 08A026X SPACER WASHER 33 08A030X BLOWOUT SHIELD 33d 08A039X STUD: φ3.3 in mm 33 08A362X 6 6 6 6 6 6 WASHER 3 08C58X PANEL 35 08D3090C ARM ASSEMBLY 35 A-90022-05 2 2 2 2 2 2 HAIR PIN CLIP: φ0.38 in 0 mm 35 08A00X SPRING : LEFT 35 08A08X 2 2 2 2 2 2 CONTACT ARM: MACHINED 35d 08A02X SPRING: RIGHT 35 08A025X 2 2 2 2 2 2 CONTACT TIP 35f 08A028A 2 2 2 2 2 2 ARM INSULATION 35g 08A029X 2 2 2 2 2 2 STOP WASHER 35h 08A035X 2 2 2 2 2 2 SPRING PIN 35k 08A038X STOP 35p A-900298-02 2 2 2 2 2 2 BEARING: SELF LUBRICATIONG 35q 08A565A THREADED ROD 35r 08B03X ARM SHAFT 35s 08B029A 2 2 2 2 2 2 CONTACT ARM ASSEMBLY 35t 08C2992A MAIN ARM MACHINED 35u A-900298-03 2 2 2 2 2 2 BEARING: SELF LUBRICATIONG 36 00A03B NAME PLATE A-900007-02 SCR HEX HEAD: 5/6-8 x 0.75 UNC STEEL 6 A-900007-05 SCR HEX HEAD: 5/6-8 x.25 UNC STEEL 7 A-900007-06 SCR HEX HEAD: 5/6-8 x.5 UNC STEEL 9 A-900007-08 SCR HEX HEAD: 5/6-8 x 2.0 UNC STEEL 50 A-900008-08 SCR HEX HEAD: 3/8-6 x.75 UNC STEEL 5 A-90000-09 SCR HEX HEAD: /2-3 x 2.5 UNC STEEL 52 A-9006-05 3 3 3 3 SCR PAN HEAD: M x 0.7 x 0 mm STEEL 55 A-900023-07 SCR RH SLOTTED: 0-32 x 0.88 UNF STEEL 56 A-900023-09 6 6 6 6 SCR RH SLOTTED: 0-32 x.25 UNF STEEL 58 A-900023-3 2 2 2 2 2 2 SCR RH SLOTTED: 0-32 x 0.3 UNF BRASS 59 A-900023-8 6 8 8 6 8 SCR RH SLOTTED: 0-32 x 0.38 UNF BRASS 60 A-900023-5 2 2 2 2 2 2 SCR RH SLOTTED: 0-32 x 0.50 UNF BRASS 62 A-900023-25 2 2 2 2 2 2 SCR RH SLOTTED: 0-32 x.75 UNF BRASS 6 A-900025-6 2 3 2 2 3 2 SCR RH SLOTTED: /-20 x 0.38 UNC BRASS REQ REQ REQ REQ REQ REQ ITEM PART NUMBER DESCRIPTION A230 M230 0-230 A5 M5 0-5 65 A-900025-7 SCR RH SLOTTED: /-20 x 0.50 UNC BRASS 67 A-900025-22 SCR RH SLOTTED: /-20 x.75 UNC BRASS 70 A-90006-38 3 3 3 3 NUT HEX: M x 0.7 STEEL 7 A-90006-03 2 2 2 2 2 2 NUT HEX: #0-32 UNF STEEL 72 A-90006-05 NUT HEX: /-20 UNC STEEL 7 A-90008-2 7 2 2 7 2 NUT HEX JAM: /-20 NC BRASS 75 A-90008-2 NUT HEX JAM: 5/6-8 NC BRASS 76 A-9002-07 22 2 22 22 2 22 NUT HEX JAM: 3/8-6 NC BRASS 77 A-9006-3 3 3 3 LOCKWASHER INTERNAL TOOTH: M STEEL A-9005-03 5 5 5 5 LOCKWASHER SPLIT: #0 STEEL 79 A-9005-05 23 2 23 23 2 23 LOCKWASER SPLIT: STEEL A-9005-06 LOCKWASHER SPLIT: 5/6 STEEL 8 A-9005-07 9 0 9 9 0 9 LOCKWASHER SPLIT: 3/8 STEEL 82 A-9005-09 LOCKWASHER SPLIT: 2 STEEL 83 A-9008-03 FLATWASHER: #0 STEEL 8 A-9008-05 9 7 9 9 7 9 FLATWASHER: STEEL 85 A-9008-06 6 6 6 6 6 6 FLATWASHER: 5/6 STEEL 86 A-9008-07 9 0 9 9 0 9 FLATWASHER: 3/8 STEEL 87 A-9008-09 3 3 3 3 3 3 FLATWASHER: 2 STEEL 88 A-9008-8 2 0 2 2 0 2 FLATWASER: #0 BRASS 89 A-9008-26 2 3 2 2 3 2 FLATWASHER: BRASS 90 A-90002-23 2 2 2 2 2 2 SCR RH SLOTTED: #8-32 x 0.75 UNF BRASS 9 A-90029-06 2 2 2 2 2 2 EXTERNAL RETAINER RING: SHAFT 3/8 STEEL 9 A-90029-09 2 2 2 2 2 2 EXTERNAL RETAINER RING: SHAFT 2 STEEL 95 A-9003-08 3 3 3 3 3 3 SCREW ASSEMBLY: M5 x 0.8 x 6 mm STEEL 00 A-9005-28 2 2 2 2 2 2 LOCKWASER SPLIT: M 06 900C30B5 INTERCONNECTION WIRE: M 07 900C30B6 INTERCONNECTION WIRE: L- 08 900C30B7 INTERCONNECTION WIRE: L+ 09 900C30B8 INTERCONNECTION WIRE: M2 900C55A20 INTERCONNECTION WIRE: M2-2 2 900C55A2 INTERCONNECTION WIRE: L- 2 900C55A36 INTERCONNECTION WIRE: L- 3 900C55A32 INTERCONNECTION WIRE: L+ 900C55A3 INTERCONNECTION WIRE: 3 5 900C55A30 INTERCONNECTION WIRE: 6 900C55A25 LEAD ASSEMBLY RHEOSTAT: 3 7 900C55A3 LEAD ASSEMBLY RHEOSTAT: 8 900C55A35 INTERCONNECTION WIRE: U 9 900C55A37 INTERCONNECTION WIRE: L+ 9 900C55A0 INTERCONNECTION WIRE: F- 20 900C55A29 INTERCONNECTION WIRE: 2 900C55A INTERCONNECTION WIRE: M2-22 900C55A39 INTERCONNECTION WIRE: D 5
MC-A WIRING DIAGRAMS MC-A AUTOMATIC CONTROLLER WIRE DIAGRAM P/N: 08B670X (230 V-d) 08B670C (5 V-d) MC-A MANUAL CONTROLLER WIRE DIAGRAM P/N: 08B670A (230 V-d) 08B670D (5 V-d) MC-A AUTOMATIC CONTROLLER (Vril Voltg) WIRE DIAGRAM P/N: 08B670B (0 230 V-d) 08B670E (0 5 V-d) TABLE OF EQUIPMENT SYMBOL DESCRIPTION FUNCTION D REVERSE CONTACT DROP L MAIN CONTACT LIFT RH.0 RHEOSTAT DROP CONTROL R-R2 2 RESISTOR DROP RESISTOR (230V-d) R-R2 8 RESISTORS DROP RESISTOR (5V-d) R3-R 8 RESISTOR DISCHARGE RESISTOR DM DIODE MODULE BLOCKING DIODE Z-Z2 MOV SUPPRESSOR DIODE PROTECTION CR CONTROL DIODE ANTI-REVERSE PROTECTION 6
MAINTENANCE AND TROUBLE SHOOTING Chk ll ontt tips for xss wr or urning. Rpl if ndd. Chk r shilds for urnt rs. Rpl ny tht r dly urnd. Chk for urnd or dmgd insultion on shunts or wirs. Rpl if found. Chk for ron trking on th s pnl nd insulting prts. If found, rmov y filing or srping. If ron n not rmovd, rpl th prt. Chk gp ( 3 " (20 mm) opning) twn min ontts (#27 nd #35). Adjust y loosning srw (#6) on prt (#35) nd turning th ssmly. All pin onntions should mov sily, nd ontt springs should provid for whn ontts r losd. If springs do not provid ontt for, rpl thm. Chk Powr Diod Intgrity (DM) with stndrd Digitl Volt Mtr (DVM), st to th diod hk funtion. (S ownr s mnul for dtils.) Disonnt lds to th diod nd rmov supprssors MOV (Z nd Z2) to isolt from th iruit. Pl th rd ld of mtr on Trminl of diod (numr is stmpd nxt to trminl) nd th lk ld on Trminl 2. Mtr should rd <.0. Rvrs lds nd mtr should rd.(00). Rpt for Trminls 3 (rd) nd (lk). If th diod rds d, rpl. Ronnt wirs nd MOVS (Z nd Z2). NOTE: Z nd Z2 r MOV supprssors to hlp limit voltg spiks pplid to DM nd using dmg. OHIO MAGNETICS PERFORMANCE ENGINEERED EMERGENCY SPARE PARTS KITS AND/OR KITS Automti #ESP-08M7020A Contins th prts most likly to fil du to systm prolm or high voltg spik. It is rommndd tht on of ths kits kpt on hnd to void unnssry down tim. OHIO MAGNETICS, INC. OM-9573 July 2007 M Printd in U.S.A. 500 Dunhm Rod Mpl Hights, OH 37-3687 0/86-66 Phon: 26/662-88 Fx: 26/662-9526 26/662-29 26/662-38 Sls Compny Enginring E-mil: sls@ohiomgntis.om Wsits: www.ohiomgntis.om www.hdindustris.om
STEP BY STEP CONTROLLER OPERATION MC-A RESISTOR ASSEMBLY CONTROLLER 5 6 7 8 AUTOMATIC CONTROLLER. Whn lift signl is givn y losing th ontts twn trminls F nd U, th L oil is nrgizd. 2. This loss th L ontts whih supplis full powr to th mgnt. 3. Whn drop signl is givn th F to U ontt is rokn nd th L oil is d-nrgizd.. This opns th L ontts nd t th sm tim llowing urrnt to flow through loking diod DM. 5. A dishrg iruit is st up through rsistors R3 & R nd th, 2 winding of th D oil, (nrgizing th oil). MANUAL CONTROLLER. Whn lift signl is givn y losing th ontts twn trminls F nd U, th L oil is nrgizd. 2. This loss th L ontts whih supplis full powr to th mgnt. 3. Whn drop signl is givn th F to U ontt is rokn nd th L oil is d-nrgizd.. This opns th L ontts nd llows urrnt to flow through loking diod DM. 5. A dishrg iruit is st up through rsistors R3 & R. 6. Enrgy in th mgnt is dissiptd through th R3 & R rsistors. 6. This uss th nrgy in th mgnt to dissiptd through th R3 & R rsistors, nd th D ontts to los. 7. Rvrs voltg is thn pplid to th mgnt through th R nd R2 rsistors. 8. Whn th propr mount of rvrs urrnt to th mgnt, (s djustd y th rhostt), is msurd y th, 2 winding of th D oil, it nls th fft of th, 3 winding of th D oil nd th D ontts opn. 9. This stops th flow of rvrs urrnt through th mgnt. 7. Moving th mstr swith to th drop position or pushing th drop utton, loss th ontt twn trminls F nd D, nrgizing th D oil. 8. This loss th D ontts nd provids rvrs voltg to th mgnt, through rsistors R nd R2. 9. To stop th uild up of rvrs urrnt, rls th mstr swith ontrol nd it will rturn to th off position, or rls th drop push utton. 0. This rks th ontt twn th F nd D trminls, d-nrgizs th D oil, (opning th D ontts), nd stops th flow of rvrs urrnt through th mgnt. P/N: 08A5S 230 V-d WITH DIODE 2 7 0 5 6 2 NO. QTY PART NUMBER DESCRIPTION 5 6 7 7 2 08BR MOUNTING BRACKET 3 2 08B55G RESISTOR: 2 2 08B55A RESISTOR: 8 08B55A RESISTOR: 8 5 900A06003 THRD ROD: M8 x.25 x 225mm 6 8 08A500X WASHER 7 8 A-9005-3 LOCKWASHER: M8 8 8 A-90006- HEX NUT: M8 x.25 0 08A8A BUS BAR 08A8B BUS BAR 8 0 5 6 P/N: 08A5T 5 V-d WITH DIODE 3 7