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1. Model Code Breakdown

Selecting an ELMA Model Number (e.g. BEMDA-BP)

Pump Size

Actuator Type

Input Signal

Action

Power Requirement

B = 680

E = NEMA Type 4X C = 10-50 mA

D = Direct Action

A = 115 V, 60 Hz

C = 880

W = NEMA Type 7

D = 1-5 mA

R = Reverse Action C = 220 V, 50 Hz

D = 200

Z = Special

M = 4-20 mA

V = 1-5 V dc

P = 3-15 psi
NEMA 4 only

S = Split Range
(50%; 4-20 or
12-20 mA)

X = No Auto
Signal

Z =Special

Some input signals and operations options are no longer available; contact your sales representative if you have

questions.

OPERATOR STATION OPTIONS

(For Customer Mounting and Wiring)

Manual Potentiometer (Follows pump mounted potentiometer signal only) (3)

Manual Potentiometer w/Meter Readout (1)(3)(5)

Auto-Manual (2)

Auto-Manual w/Meter Readout (1)(2)(5)

Ratio Control

Ratio Control w/Meter Readout (2)(7)

Ratio Control w/Meter Readout and Auto-Manual (2)(3)(7)

Ratio Control w/Auto Manual (3)

No Option (Straight Automatic)

Special

OPERATOR STATION ENCLOSURES

NEMA 4X Stainless Rain/Moisture Tight/Corrosive Resistant Pump Mounted (7)

NEMA 4X Plastic Rain/Moisture Tight/Corrosive Resistant Pump Mounted (7)

NEMA 4X Plastic Rain/Moisture Tight/Corrosion Resistant (7)

NEMA 4X Stainless Rain/Moisture Tight/Corrosion Resistant (Outdoor) (7)

No enclosure, Components only

Special

Notes:

1. For split range jobs, the order must specify whether the lower (e.g., 4-12 mA) or

upper (3.g. 12-20mA) signal portion range is required, and also whether reverse
action is needed. A very common application for this feature is for acid or alkali

Содержание ELMA NEMA 4X

Страница 1: ...i ELMA CONTROLLER IOM CTL ELMA 2008 REV A Installation Operation Maintenance Manual Stroke Length Controller ...

Страница 2: ...N 7 4 1 Check Model Number 7 4 2 Wiring Instructions 7 5 CALIBRATION 8 5 1 Mechanical Stops 8 5 2 Comparator Circuit 8 5 3 Deadband 10 5 4 Meter Readout 10 5 5 Ratio Control 11 5 6 Pneumatic Input 11 5 7 Protection Circuitry 11 5 8 Connection Diagram 14 5 9 Trouble Shooting 14 5 10 Repairs 15 6 SPECIFICATIONS 19 7 DRAWINGS19 7 1 NEMA Type 4X Cross Section 20 7 2 NEMA Type 4X Exploded Isometric 21 ...

Страница 3: ...al for complete instructions OPERATIONAL NOTICE The ELMA electronic stroke actuator is designed to function only when the pump is operational To ensure proper adjustment of pump stroke length the actuator should operate only when the pump motor is also operating Control systems should be designed to ensure that the actuator does not operate to change stroke set point when the pump is not operating...

Страница 4: ...ntiometer w Meter Readout 1 3 5 C Auto Manual 2 D Auto Manual w Meter Readout 1 2 5 E Ratio Control F Ratio Control w Meter Readout 2 7 G Ratio Control w Meter Readout and Auto Manual 2 3 7 H Ratio Control w Auto Manual 3 X No Option Straight Automatic Z Special 7 OPERATOR STATION ENCLOSURES H NEMA 4X Stainless Rain Moisture Tight Corrosive Resistant Pump Mounted 7 J NEMA 4X Plastic Rain Moisture ...

Страница 5: ...rocess control signal The controller design provides a compact integral to the pump servo amplifier configuration which utilizes AC synchronous motor technology as the primary driver The stroke length is linear and proportional directly or indirectly as chosen by the customer to the input control signal Likewise the reference feedback signal which is provided for remote monitoring of actual stroke...

Страница 6: ...m the power supply only 2 3 Optional Features 1 3 15 PSI input signal 0 C F M 2 Variable ratio control 3 Reverse acting control e g 4 mA 100 20 mA 0 4 Split ranging 5 220 volt 50 Hz operation 6 Specials consult the factory for your special application ...

Страница 7: ... The feedback potentiometer provides a voltage to the circuit board which corresponds to actual stroke length The main function of the circuit board is to compare two analog signals to each other and to determine whether to increase decrease or keep the same stroke length The two analog signals come from the feedback potentiometer and from an external instrument Examples of this include flowmeters...

Страница 8: ...shed by hand turning the micrometer knob Signal Loss Detection The circuit board can be configured suck that if a loss of input signal occurs it will maintain the stroke length at the position of the last given signal or drive the stroke length to zero Over Signal Protection The circuit board disregards out of rang signals which can lead to problems with over driving NEMA Type 7 UL Listed enclosur...

Страница 9: ...LMA unit be delivered in a separate conduit from the process signal or wiring for optional accessories A separately switched and protected circuit is recommended for the actuator power supply Wiring the actuator in parallel with other devices i e pump motor can result in damage to the circuitry Remove the actuator cover which is held on by seven screws or screwed on as on NEMA Type 7 to expose the...

Страница 10: ...cure in place with setscrews 5 Note position of dial counter Turn adjustment shaft clockwise 10 times 6 Slide rear mechanical stop back against buishing Secure in place with setscrews 7 Loosen knob and duo dial 8 Reset dial to 10 and secure with setscrews NOTE Pumps with stroke length of 0 375 will need 7 5 on the dial at 100 stroke setting 9 Position knob lining up long marks on knob with numbers...

Страница 11: ...mote process signal and remote manual potentiometer a With the override toggle switch in the man position wire the actuator and remote enclosure per the supplied wiring diagram b For AUTO MANUAL units turn the remote control switch to the auto position c Perform steps b i as outlined in Procedure 1 For MANUAL units substitute a signal generator in place of the process signal d Place both the overr...

Страница 12: ... actuator movement with no change to the input signal Deadband adjustments are preset at the factory If adjustments to the deadband have been unsuccessful you can go back to factory preset by turning the trim potentiometer screw ten times CCW counter clockwise then one turn CW clockwise 5 4 Meter Readout See figures 3 4 a Put proper load and or meter across TB1 7 as and with TB1 8 as for a 4 20 mA...

Страница 13: ... terminal black lead of the feedback potentiometer i With the micrometer hand knob at the 0 stroke setting adjust the low Cal trim potentiometer until a 1 volt reading is obtained j Turn the knob to the 100 setting and adjust the High Cal trim potentiometer until a 5 volt reading is obtained k Repeat steps I and j until the voltages from the feedback wiper stabilize at 1 and 5 volts l Reconnect th...

Страница 14: ...Table 1 DIP Switch Settings figure 3 Switch Position Function S1 S2 S3 1 Calibration mode protection disabled Open Open Open 2 Drive to zero on loss signal Closed Open 3 Freeze at last setting on loss of signal Open Closed 4 Over signal protection Closed Note 1 If both S1 and S2 are closed Function 3 will be active 2 _ signifies switch can be in either position for that function 3 Set switches by ...

Страница 15: ...13 ...

Страница 16: ... feedback potentiometer see repairs 9 Circuit board malfunction 10 Broken drive belt Actuator adjusts to incorrect settings 1 Control signal incorrect or of inverted polarity 2 Incorrect ratio control setting if so equipped 3 Circuit board out of calibration see Calibration 4 Meter readout out of calibration if so equipped See Calibration 5 Actuator misaligned to pump See Repairs 6 Defective feedb...

Страница 17: ...s mid scale 6 Install the potentiometer carefully without rotating or changing the position Reconnect P3 to the circuit board Zero Adjust on Duo Dial See Mechanical Stops pages 5 and 6 Conversions To convert a manual control 200 680 or 880 pump to ELMA control the following assemblies are required 1 Convert kit and actuator 2 Option kit as required a Ratio control option W208946 000 b Pressure Con...

Страница 18: ...aft into gearbox Note Adjustment shaft is left handed 6 Slide adjustment shaft extension over adjustment shaft and into bushing 7 For NEMA Type 7 skip to Assembly of ELMA Control 8 Locate template provided over shaft extension and worm shaft Mark 4 mounting hole centers Note There are eight holes in template Only use 4 holes indicating in Fig 8 for model pump being converted 9 Remove template Dril...

Страница 19: ...ft extension Slide timing gear over shaft extension forward to gearbox Secure timing gear in place with 2 8 32 setscrews spaced 90 degrees apart 3 Turning worm shaft position crosshead at full forward extension 4 Thread adjustment shaft up to piston leaving a gap between piston and crosshead of 0 002 inches 5 Slide front mechanical stop forward until it is tight against the gearbox wall Secure sto...

Страница 20: ...adjuster as shown in Fig 8 13 NEMA Type 4X only install belt guard and bracket Space upper standoff 8 flat washer between bracket and standoff to insure proper alignment of adjustment shaft extension b NEMA Type 7 only install belt guard and bracket 14 With the adjustment shaft at 100 stroke fully retracted set duo dial at 10 and mount on shaft extension Be sure to position locking groove in dial ...

Страница 21: ...roof Class 1 Division 1 Group C D actuator enclosure Manual override with override switch standard 0 100 stroke length indicator at pump standard High Resolution Servo Amp built into actuator no separate cabinet required 15 second maximum response time for 0 100 change Power consumption is only 60 watts Compact space saver design Electric standard or pneumatic option signal capability Circuit boar...

Страница 22: ...20 7 1 NEMA Type 4X Cross Section ...

Страница 23: ...21 7 2 NEMA Type 4X Exploded Isometric ...

Страница 24: ...22 7 3 NEMA Type 7 Cross Section ...

Страница 25: ...23 7 4 NEMA Type 7 Exploded Isometric ...

Страница 26: ...24 ...

Страница 27: ...nstruction Stroke Length Controller ELMA CONTROLLER Bulletin IOM CTL AE 2008 REV A Stroke Length Controller A unit of IDEX Corporation 2883 Brighton Henrietta Town Line Road Rochester NY 14623 1 585 292 8000 www pulsa com pulsa idexcorp com ...

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