Honeywell 272630D User's Manual
Contents
1. SEAT First and last steps are 0 75V per step 28 steps 0 25V per step FEEDBACK VOLTAGE 1 75V 2 5V 9 5V 10 25V Fig 4 Feedback voltage response for reverse acting ML7984 LOWER SEAT Auxiliary Switch Setup 1 Drive actuator to desired position 2 Adjust trimmer potentiometer trim pot until relay is energized On board LED will light Automatic and Control Solutions Honeywell International Inc Honeywell Limited Honeywell Limitee 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN Scarborough Ontario 55422 M1V 429 Honeywell2. and equipment damage All wiring must comply with applicable local electrical codes ordinances and regulations DO NOT electrically operate the ML6 7984 actuator before assembly to the valve because damage not apparent to the installer may occur Mount the actuator to the valve before connecting to power Assembly 1 Remove plastic cover from the ML6 7984 by loosening the two screws located on the top Note These screws are captive Rotate three complete revolutions to remove cover Slide the auxiliary board into the two slots at the bottom of the bridge Push back and snap the board into the fingers See Fig 1 Connect one end of the 4 pin connector to the main board and the other end to the auxiliary board if it is not already connected The connectors are keyed and only install one way Mount the actuator onto the valve body and connect wiring Reinstall cover after operational check Fingers Slots 1 Install circuit board Fig 1 Installation of auxiliary board OPERATION The first time the valve is powered the microprocessor will automatically cycle the valve through a full stoke to calibrate its position Any stroke between 1 2 13 mm and 1 25 mm will be divided into 30 equal steps Run time will be proportional to stroke length For example nominal timing for 3 4 stroke is 63 seconds For 1 2 stroke this would be 42 seconds The LED lights up when term
3. Honeywell 272630D Position Feedback and Auxiliary Switch Accessory For ML6984 and ML7984 INSTALLATION INSTRUCTIONS APPLICATION The 272630D auxiliary board is an optional circuit board that is used in conjunction with Series 4000 ML6984 and ML7984 globe valve actuators This auxiliary board combines the function of an adjustable low voltage SPDT auxiliary switch with a 2 10 Vdc or 4 20 mA position feedback signal It has a 4 pin keyed connector for communications from the mother kl nfo circuit board vee pi 4007732001 REV B HHONEXWELL SPECIFICATIONS Feedback 2 10 Vdc 10 2 V reverse acting into minimum impedance 500 Q Maximum output current is 20 mA dc Auxiliary Switch SPDT 24 V 50 60Hz 1 A inductive Fixed differential 3 of stroke adjustable operating point from 0 to 100 of stroke 2005 04 RJ Printed in Canada Form No 95C 10941 272630D Auxiliary Board INSTALLATION When installing this product i Read these instructions carefully Failure to follow them could damage the product or cause a hazardous condition Check ratings given in instructions and on the product to ensure the product is suitable for your application Installer must be a trained experienced service technician After installation in complete check out product operation as provided in these instructions cairo Disconnect power supply before beginning installation to prevent electric shock
4. inals T5 T6 are powered and flash when the actuator is in motion NOTE 272630D requires that the actuator be continuously powered so ML6984 must be wired in 5 wire configuration C NC contact C NO contact CLOSED CLOSED 2 10 V when valve when valve 4 20 mA position is position is into below trim pot above trim pot 500 Q setting direct setting direct feedback acting acting output COM AA ck NC no 8 FB COM OVE OO RLY1 LED Connect to main board for position feedback Fig 2 Wiring and operation of auxiliary board 272630D The 272630D provides 1 A2 10 Vdc voltage proportional to the valve stem position This output is capable of sourcing up to 20 mA dc drive current 2 An isolated Form C relay contact closure that energizes when the valve is open more than the setting of the trimmer potentiometer trim pot Position feedback voltage mirrors the control signal For ML6984 and direct acting ML7984 operation see Fig 3 For reverse acting ML7984 see Fig 4 STROKE A UPPER SEAT First and last steps are 0 75V per step i Z 28 steps 0 25V per step LOWER SEAT fs tot 5 FEEDBACK VOLTAGE 1 75V 2 5V 9 5V 10 25V Fig 3 Feedback voltage reponse for ML6984 and direct acting ML7984 STROKE A UPPER
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