MAMAC Systems EP-311, EP-313 Data Sheet

Model EP-311/313

For additional information, see the accompanying data sheet for this
transducer.

Ordering Information

MANUAL OVERRIDE RANGE

311

Without ov

313 With override

erride 315

020

3 - 15 psig

0 to 20 psig

Dimensions

Electropneumatic Transducer

Weight: 1.0 lb. (.45 kg)

* Includes nonlinearity, hysteresis, and non-repeatability.

Technical Information

Installation

Inspection

Inspect the transducer packaging for signs of damage. If damaged,
notify the carrier immediately.

Requirements

• Tools (not provided):

- Digital volt-ohm meter (DVM)

- Appropriate screwdriver for mounting screws

- Appropriate drill and drill bit for mounting screws

• Appropriate accessories

• Three #8 self-tapping mounting screws (not provided)

ced technician

• Training: Installer must be a qualified and exper

W

ARNING !

• Do not use on oxygen service, in an explosive or hazardous
environment, or with flammable or combustible material.

• Disconnect the power supply before installing the transducer. Failure
to do so can result in electrical shock and equipment damage.

• Make all connections in accordance with the job wiring diagram and
national and local electrical codes. Use only copper conductors.

• Use electrostatic discharge precautions such as wrist straps when
installing and wiring the transducer.

• Do not exceed ratings for the transducer.

ien

Rev. 0

Figure 1. Electropneumatic Transducer Dimensions

Specifications

Accuracy*: ± 1% FS

Maximum Supply Pressure: 40

PSI

Pressure Differential: 0.1 PSI

(supply to branch)

Supply Voltage: 18 - 28 VAC/

VDC

Supply Current: 150 mA

Enclosure: 18 gage C.R. steel chassis

Finish: Baked-on enamel PMS2GR88B

Figure 2. Electropneumatic Transducer

Mounting

The electropneumatic transducer must be mounted in an upright
position so tha
easily.

1. Select the mounting location.

2. Mount the transducer on a vertical surface with three #8 self-

tapping screws (not provided).

3. Pull wires through the bottom of the transducer and make the

necessary connections.

4. Make the pneumatic connections.

Wiring

Use 12 AWG wire maximum for wiring terminals and flexible 1/4-inch
outer diameter poly tubing for main and branch pneumatic connections.
See Figures 3 and 4 for wiring configurations and Figures 5 through 7
for jumper designations.

AUTION !

C

• Ensure that the main supply pressure does not exceed 40 PSI.

• Ensure a minimum

transducer and the actuator.

• For a 24 VAC supply voltage, ensure that the hot and neutral are not
reversed. If more than one transducer is being powered from the
same transformer, the hot and neutral should be the same for each
transducer.

ports are facing upwards and the gage can be read

t the

of 6 to 10

feet (1.8 to 3.0 m) of tubing between the

Conformance: EMC Standards EN50082-1(1992), EN55014(1993)/

EN60730-1(1992)

Compensated Temperature Range:

25°F to 150°F (4°C to 65°C)

T. C. Error: ± 0.025%

Media Compatibility: Clean dry air or any inert gas

Port Connection: 1/4-inch outer diameter poly tubing

Environmental

Termination: Screw terminal block

Wire Size: 12 gage maximum

Input Impedance: 301 ohms (4 - 20 mA); 10,000 ohms (0 - 5 or 0 - 10

VDC)

IS.EP311/313-00

/°F (.03%/°C)

: 10 to 90%

RH non-condensing

Note: The transducer’s gage is for indication only. The transducer
measures more precisely than what is displayed on the gage.

Typical Applications (wiring diagrams)

Figures 3 and 4 illustrate typical wiring diagrams for the
electropneumatic transducer.

Transducer Operation

1. Adjust the input signal to obtain a maximum output pressure for the

appropriate range.

2. Ensure that the output is 15 or 20 PSI.

3. Adjust the input signal to obtain a minimum output pressure.

4. Ensure that the output is 0 or 3 PSI.

Calibration

All electropneumatic transducers are factory calibrated to meet or
exceed published specifications. If field adjustment is necessary, follow
these instructions:

Figure 3. Wiring the Electropneumatic Transducer With a 24 VAC Supply

Figure 4. Wiring the Electropneumatic Transducer With a 24 VDC Supply

C

!

AUTION

• This transducer contains a half-wave rectifier power supply and must
not be powered from transformers powering other devices with non­isolated full-wave rectifier power supplies.

Adjustments

Jumper Configuration

The electropneumatic transducer is factory configured for 4 - 20 mA
output. To change the input configuration, adjust the jumper settings.
See Figures 5, 6, and 7.

1. Connect air to the Main port. See Figure 8.

2. Connect an accurate gage to the Branch port using a minimum of

t

o 10 feet (1.8 to 3.0 m) of tubing.

3. Connect the [+] and [-] terminals to an appropriate power source fo
he transducer. The transducer can accept either a 24 VAC or V

t
s

upply voltage. The maximum supply voltage should not

C/ VDC .

VA

DC

exceed 30

4. Apply a low input signal to the [-] and [I] terminals (0 VDC or 4 mA).

5. Adjust [Z] to obtain the desired low output pressure.

6. Apply a high input signal to the [-] and [I] terminals (5/10 V

mA

).

DC or 20

7. Adjust [S] to obtain the desired high output pressure.

8. Repeat steps 4 through 7 until the transducer is fully calibrated.

6

r

Figure 5. Jumper Settings for Electropneumatic

Transducers With 4 - 20 mA Input

Figure 6. Jumper Settings for Electropneumatic

Transducers With 0 - 5 VDC Input

Figure 7. Jumper Settings for Electropneumatic

Transducers With 0 - 10 VDC Input

Checkout

1. Verify that the transducer is mounted in the correct position.

2. Verify the appropriate input signal and supply voltage.

3. Verify the appropriate input configuration.

!

AUTION

C

• Do not connect 120 VAC to the electropneumatic transducer.

Figure 8. Terminal Locations on the Electropneumatic Transducer

Maintenance

Perform regular maintenance on the total system to ensure the
sustained optimum performance of the electropneumatic transducer.

Field Repair

Do not attempt to repair the electropneumatic transducer. Replace a
malfunctioning transducer with a functional transducer if necessary.

Warranty

See the accompanying data sheet for additional information. For
technical / application assistance, call your nearest office.

EUROPE AUSTRALIA

Baird House, Units 6 & 7

Dudley Innovation Centre

Pensnett Estate • Kingswinford

West Midlands • DY6 8XZ

United Kingdom

01384-271113 • Fax [phone]

ASIA CANADA

No. 22 Lorong 21A Geylang

#11-02 Chin Hin Hang Building

Singapore • 388431

65-6392-7273 • Fax [phone]

4 Armiger Court, Unit 2
Holden Hill • S.A. 5088

08-8359-4333 • Fax [phone]

905-474-9215 • Fax [phone]

Australia

155 Mcintosh Drive, Unit 5

Markham • Ontario • L3R 0N6

Canada

IS.EP311/313-00

Copyright

©

Mamac Systems 2003. All rights reserved.

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