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Refer to the QuickLIT website for the most up-to-date version of this document.

EP-8000 Series Electro-Pneumatic Transducers Product/Technical

Bulletin

EP-8000 Series Electro-Pneumatic Transducers

convert a voltage or current signal from an electronic

controller into a pneumatic output pressure signal. An

increase or decrease in the input signal proportionally

increases or decreases (respectively) the output

pressure signal from the EP-8000. Four models are

available, which are grouped into two basic versions:

low-volume output units (non-relay) and high-volume

output units (relay).

The EP-8000 is designed to output a proportional

pneumatic control signal in response to an electronic

control signal. All units feature barbed air connections

for 5/32 or 1/4 inch O.D. polytubing. Sequencing of

pneumatic valve or damper actuators can be

accomplished using a Johnson Controls® V-9502

(Valve) or D-9502 (Damper) Actuator Positioner.

Figure 1: EP-8000 Low Volume (Left) and

EP-8000 High Volume (Right) Transducers

Table 1: Features and Benefits

Features Benefits

Compact, Simple Design Eases installation on a variety of mounting surfaces, including direct

mounting on pneumatic valve actuators

Choice of 0-10 VDC or4-20 mA Input Range Interfaces with a wide range of controllers, making the unit ideal for

retrofit installations

Hypodermic Needle Test Point Allows for fast and easy output pressure signal measurement

Factory Set, Fully Adjustable Zero and Span Facilitates field calibration, saving installation costs

High Accuracy with Low Hysteresis Provides many years of use with less time spent on maintenance

EP-8000 Series Electro-Pneumatic Transducers

Product/Technical Bulletin

Code No. LIT-216370

Part No. 24-85368-36, Rev. H

Issued February 2016

Summary of content (9 pages)

PAGE 1
H . v e R , 6 3 8 6 3 5 8 4 2 EP-8000 Series Electro-Pneumatic Transducers Product/Technical Bulletin Code No. LIT-216370 Part No. 24-85368-36, Rev. H Issued February 2016 Refer to the QuickLIT website for the most up-to-date version of this document. EP-8000 Series Electro-Pneumatic Transducers convert a voltage or current signal from an electronic controller into a pneumatic output pressure signal.
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Operation Input Versus Output Relationship A change in the electrical input signal modulates the amount of air that exhausts from the leakport, producing an output pressure directly proportional to the input signal. Input and output pressure and flow relationships are detailed in Figures 3 through 5. A potentiometer located next to the wiring terminal block is provided for field span adjustment, and a screw located on the side of the EP-8000 is provided for zero adjustment.
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VDC Figure 5: High-Volume Models, Output Flow Capacity (scim and mL/s) versus Input Signal (Volts DC and mA) Dimensions 5° 5° Figure 7: EP-8000 High Volume Output Model Dimension (in./mm) Installation Parts Included • EP-8000 Transducer • No. 8 3/8 in. sheet metal screws (2) Tools Required • flat-blade screwdrivers, 3/32 in. and 1/4 in. • 5/32 in. drill bit and drill Mounting Regardless of the mounting method chosen, the EP-8000 must be mounted within 5° of vertical for proper operation.
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Panel Mounting To mount an EP-8000 on a pneumatic valve actuator, the EP-8000-101 Mounting Kit (ordered separately) must be used. The EP-8000, in conjunction with the EP-8000-101, can be mounted on the following actuators: 4R, 5R, 8R, V-400, V-500, or V-3000-1 Series Valve Actuator with or without a V-9502 Valve Actuator Positioner. (See Figure 8.) It can also be used with a V-3000-8001 Series Valve Actuator with or without a V-9502. (See Figure 9.
PAGE 5
Wiring and Pneumatic Connections Risk of Electric Shock. Disconnect the power supply before making electrical connections to avoid electric shock. • Observe the polarity as designated on the terminal block of the EP-8000. • Provides adequate stress relief for the wiring. A wiring entry slot is molded into the cover for routing to an analog DC source. Observe the following guidelines when making pneumatic connections: Risque de décharge électrique.
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S DA-1 FO-1 P S S P S Figure 13: Application of a High Volume EP-8000 With a V-9502 Positioner S Figure 12: Application of a Low Volume EP-8000 With a D-9502 Positioner N.O. N.C. S S S Figure 14: Application Using High Volume EP-8000s To Drive Valve and Damper Pneumatic Actuators Calibration 3.
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If the calculated sensitivity does not fall within these limits, the desired span cannot be obtained. Reselect new desired values in Steps 1 and 2. Repeat Steps 3 and 4. 11. Turn the zero adjustment screw to obtain the desired low pressure (PL). Clockwise rotation increases the pressure; counterclockwise rotation decreases the pressure. 5. Determine if the zero setting is within one of the adjustment ranges below: 12. Set the input signal to the desired high value (VH or IH).
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Table 3: Accessories Code Number Description A-4000-137 In-line Filter (Required for All Models) A-4000-1037 In-line Filter (Required for all Models; Package of Five) JC-5361 Hypodermic Needle Test Probe Assembly G-2010 Series 0 to 30 psig (0 to 210 kPa) Gauge Technical Specifications Table 4: EP-8000 Specifications (Part 1 of 2) EP-8000 Electro-Pneumatic Transducer Action Proportional — Direct Acting Supply Pressure 18 to 25 psig (126 to 175 kPa); nominal 20 psig (140 kPa); air supply must be
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Table 4: EP-8000 Specifications (Part 2 of 2) EP-8000 Electro-Pneumatic Transducer Shipping Weight EP-8000-1 and -3 0.5 lb (227 g) EP-8000-2 and -4 0.6 lb (272 g) 1. This value is specified for dead-ended loads or with controlled devices/applications with a maximum air consumption of 10 SCIM (2.7 mL/s). The performance specifications are nominal and conform to acceptable industry standards.