‘OVERNORS ENGINE Gireve GOVERNING ore. SYSTEMS ELECTRIC ACTUATOR INCLUDES MODELS: ACB 225 = ADB 225 ADC 225 omen ADB 225F el ere GOVERNORS AMERICA CORP. « 720 Silver St. * Agawam, MA 01001-2907, USA.225 SERIES ELECTRIC ACTUATOR PRODUCT eTiged TECHNICAL, INFQRMATION| ‘SEPTEMBER 1997 tec INTRODUCTION The 225 Series electric actuator is a rotary output, linear torque, proportional servo. This elactramechanical actuator is typically used as an engine fuel contio! positioning device. An internal spring provides fal sate operation by forcing the actuator to the ‘uol shut off positon won the actuetor is de-energzed, This {design combines fast operation, mull vollage usage, wider rota- lion angjes. and proven reliably, Tho actuater can operat dieoty trom 12, 24, or 32 volt battary supplies, The speed of operation of the actuator is typically faster then competitive unite, thus it provides more stable and repid ‘esponse to vensiant conditions Applications include most block pumps, witn or whout mechani= cal governors, distrioutor type pumps, and medium sized carbu- feted engines. The 25 degrees of rotation expands the application ‘0 8 witer variety af engines DESCRIPTION The actuator is an eloctromagnetic serve dovice which can be integrated into a closed loop contro! system. An engine control systam can be described as follows. An electrical signal = generated by a magnatic speed sensor which is proportional to fengine speed. Ths signalis sant into the etectronic speed control unit which compares i lo the preset engine spead setting. I ihe magnetic speed sensor signal and the preset engine speed ottng are nol equal, a change in current Irom the speed control ‘ntto the actuater wall change the magnetc force inthe actuator. The rotation of the actwator shaft wil then adjust the tual tothe, engine and cause the engine spead fo be equal lo the preset ‘ergine speed sotting. Shaf rotation is proportional tothe arrount ‘of actuator current and counterbalanced by the internal spring, Sine the design has ro sliding parts and is totally sealed, ‘outstanding rofability results. A single compression spring is sed to imorove retablity. No maintenance is necessary, DIAGRAM 1a Ace Actuator Quine Dimensions Dimensions i Inches (mm)DIAGRAM 1b * ADC only ADB and ADC Actuator Oulline Dimsnsions PERFORMANCE ‘Avoilablo Torquo Maximum Operating Shett angular Travel FOWER INPUT ‘Operating voltage Normal Operating Current .. Maximum Currni-Continuously Rated ENVIRONMENTAL Temperature Range Ralatve Humidty Al Suctace Finishes PHYSICAL Dimensions, Went Mounting RELIABILITY Vibration Testing MATING HARDWARE Connootor ACB 225/ADB 225 ADG 225 Lover c ‘ACB 205/408 225/ADC225S ADG 225 SPECIFICATIONS. See Diagram 2. FRod End Bearings (ta atiach a 1/4-28THD linkage rod t the Laver). Wiring Hamess ADC 225 ‘ACB 225/ADB 206 .. Max 2.2 itt (2.7 Nm) 25 1 degra CWICCW «+12, 24, 0732 YC "3 Aat 12 VOC co. LS A at 24/92 VOC GA at 12 VOC, 6 A for HOS voessesee Aal 26/92 VDC -85° to +200" F (54" to +95°C) up to 100% Fungus picat end corrosion resistant om See Diagram 1 = 825 Ibs. (3.75 kg) "Any poston, elactical connector et the top preterted : up to 20 G @ 50-500 Hz, 100% Tested EC1000/MS3106R 148-65 (6 pins) veers Supphid with Actuator LE 400-2 et wees LE' 00-2 BR 200 (right hanc) BA 20% (lett hand) cross Supplied wth Actuator "Various Lengths avaliable rom GAC 225 SERIES ACTUATOR VARIATIONS. ‘ACB 225/ADB 225 ......, MSSIO2A 14S-6F CONNECTOR —-ADC.225 .. . COMMERCIAL CONNECTOA 12 oF 24 VOLTSDIAGRAM 2, Graph of BASIC ACTUATOR Actuator ieee Torque 25- 2.0-| Boia, so Sey oi TORQUE < (Lb-Ft) 75 1.0-] 08+} o--—.——4 ° 5 10 15 20 25 ANGLE (eg,) INSTALLATION “Tho actuator must be rgidly mounted as close as possible to he fuel contra ever of the engine, Vibration irom the engine will nt affect the operation of the actuator. The preferred rrounting is with the electrical connector at tho top. Applications with the actuator upside down, on its back, or sideways should be ‘avoided, Linkage arrangement of ary actuator systom is alvaysimportent, High quality roc end hearings should be sac. Rod end bearings ‘hathave high friction can ceuse instability and require servicing. Lovers and linkega shoud be sturcy yet low in mess for the fastest speed cf response coneitions. ‘Arrangerentot the linkage for actuation of he engine fuel control is an important application consideration. For proportional acta torstooperate wih tinear control systems, tis importantto cblain 2 near relationship batwsen actuator stroke and tuel deivery.. The linkage configuration for diosel fuel systems is typically as aT Fuel Control Lever At Mid Fuel Position DIAGRAM 3 Illustrated in Diagram 9, The lever on the actuator chould be reerly parallalto the pump lever at the mid fuel postion for neat {ue conto. Forproporional actuators to operate with ron-iinear systems itis important to cbiain a nondinear relationship behwean actuator stroke and fuel delivery, Cerbureted, PT Purps (CUMMINS), oF thor nor-linear fuel systems require @ non-linear tual linkage Configuration as lustrated ln Diagram 4, Anon-inearfuel system results when more engine power is developed fo" a given stroke ‘at postions of low fuel settings than at high fuel settings. In this ‘case the levars should be perallel a! ful load, In general, the linkage should be adjusted so that the fuel control evar minimum and maximum fuel stops are used rather than the ‘actuator intarnal mechanical stops. The actuator should be ‘agusted 59 that It operates over atleast one helf (12 degrees) of its avallabio travel Carburetor Fuel Valve At Full Fuel Position DIAGRAM 4witing The ADC is prawirad for 12 or 24V. Use tho included harass to connect the actuator tothe speed control. De not use an ADC en 32V system. Han ACB or ADB is usod, tho mating electrisaloonnector mustke \wired ina contiguretion cependent on tie systam voltage supply ‘The maximum wire siza that wil fit into the actuator mating hall conrecioris #16 AVG (1.3 mmsq,). CableCH 1203,a pre-wired actuator cable harass, is available, tis 12 foot (4 Meters) in length and suitabe for use on 12 oF 24 vok systems. For 12 volt applications, note that itis preferable to connect four cebles, one 10 each of the coll wires and wie pet Diagram 5. Maximum current is & Amps. The recommended wire size is at loast #18 AWG (1.3 mm sq), DIAGRAM 5 32 Volt Operation Atoc Btod ‘A 6 Dto output terminals of speed control unit For24 volt applications, a simple jumper wira botween pine Bend at the mating half connector can be made. The remaining two pins, A and D, can be extended tothe required longth, Maximum ‘current is 4 Amps. The recommended wie size Is al leas! #18. ANG (1.0 mm sq). Sae Diagram 6. DIAGRAM 6 24 Volt Operation Bioc A.& D to output terminal of speed control unit For 92 vol applications, connect ihe actuator elactrical connector a ilstrated ‘or 24 Yol operation. A resistor that will érop the remaining voltage above 32 Volts is needed, A 1.5 chin, 25 watt resistor should be placed in series wth pn A ofthe actuator and the output ofthe speed control unt, Maximum currertis 4 Amps. Actuator cable hernesses with langtns areater than 10 i. (3 meters} from the actuator to tho sp0d control uit may introduce Current losses which can restrict ful rotation of the actuator. In this case, usa of a larger gauge wire is required, For applications where EM|is of concern, shielded cable for he Actuator is reccmmended. Twistng of the cable alone will sub stantialy roduco EMI ADB225F Wiring ‘Tho ADB225F version of tho aoluator includes @ position sensor. A GAC speed control unit that Includes fuel management electrons ic roquired te interface wit this sensor. / 26 the appropriate speed contol unt Ikerature for complete wiring information ~ —™ TO SPEED CONTROL UNIT “ACTUATOR” TERMINALS TO SPEED CONTROL UNIT POSITION SENSOR” TERMINALSADJUSTMENTS WARNING ‘Anoverspeed shutdown device, independent the gover- rot systom, should be provided to prevent ioss of angine ‘contl which may cause personal injury or equpment damage. Recontim that ihe inkage is not binding and that tition is rrinimal, Bolcre stating the engine, push the actuator tothe ful fuel postion end release. t snould return instanty to the no Tue postion without any binding. Once the engine nas been started, Tolncrease therange.o! he actuator votage cr current, move the linkage to a lower ho¥e on the actualor levar. A lower range of actuator current then suggested can cause instability oF poor performance, Toincrease or cacrease the no load current ar voltage, adjust the Iengtht the link between the actuator and the engine fuslcontol ‘Smaller angles of actuator travel may improve transion! per‘or- ‘menoe, but wil raduce avalable ‘o°ce at the ‘ual contro lave. Allowing the actuator fo operete through at least one halt (12 ‘degrees) ots stroke will usvally provide near optimum response. the linkage can be optimizes by tamporafly inserting an arnmeter ‘Actuator in one of the wires beiween the speed contol unit and the CurrentVoltage Range ‘actuator 0: by meastring the voltage across the actuator. Mea: Chart sure the actuator curtent or voltage et no load and full load, The oT aidibe range and the starting current or vollage are important for epti- qeyone 24 Mele mizing the linkage system. Typical values are shown in thetatle NO Load 25 Amps, 4Vots 1-5 Amps, 12 Yolts late tr 42 vom ore 24 voR ayetome Fullload © 4Amps 6 Volts 2.5. Amps, 18 Volts ‘TROUBLESHOOTING Ape 225 IHthe governor system falls to operate, make the following tests at ReawISTE 7 B8olime the aciuator mourtec connector vihila moving the actuator Red to whit (22\) Socime ‘nvaign a ack Rad io housing Infinity Measure the Resistancs White io housing Infinty Energize tha eolualer to ful fuel (folow steps in control unit publication) and manually move the actuator through its range, No binding or eticking should occur. Ithe actuator passes these tests, he problem is o'sewhero inthe system. Feafar to the corttol uri troubleshooting publication. 720 Silver St. * Agawam, MA 01001-2907, USA * (413) 786-5600 ACA 225/ADB 225 AtoB 28 ohms Cb 25 ohms toe Infirsty ‘Ato Housing Intinity Cto Housing Infeity OVERNORS, MERICA ORP. FAX (413) 786-5666 e-mail info@governore-amories.com Infernet: wow goverrors-america.com