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Tristate Pneumatic Transducer
Model EP-321
• Accepts universal 24 VAC/VDC triac or dry
... contact input
• Universal 24VAC/VDC supply voltage
• High air flow capacity
• Field adjustable pulse width and interval
• Field programmable travel time
• Compensates for system volume and leaks
• Precision pressure gauge for branch line
....indication
• Conforms to EMC and RoHS standards
RoHS
EP-321 accepts a tristate input and provides an output pressure pulse train
with a field adjustable pulse width and interval. As a result, any triac or contact
closure can be converted into a desired actuator travel. By adjusting the pulse
width and interval, the actuator travel time can be field programmed from
as low as five seconds to 25 seconds based on system volume. The EP-321
can operate over 0–20 psig pressure range and has negligible input/output differential. The EP-321 has quiet low wattage poppet valves, rugged aluminum
manifold, brass barb fittings and a unique steel chassis which substantially
reduces the overall size. A precision gauge is provided for the branch line pressure. The above features and a liberal five year warranty make the EP-321 the
highest performance and most reliable transducer in the industry.
DN321.4
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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SPECIFICATIONS:
EP-321
Output Pulse Width Range: 0.30 to 25 seconds,
± 10%
Repeatability: ± 1%
Maximum Supply Pressure: 30 psig
Pressure Differential: 0 psig (supply to branch)
Supply Current: 100 mA/2.4VA
Operating Temperature:
0° to 70°C
Storage Temperature: -40° to 100°C
Enclosure Material: 18 Ga C.R. Steel Chassis
Enclosure Finish: Baked on enamel-PMS2GR88B
ORDERING INFORMATION: EP-321
Manifold Material: Aluminum
Flow Rate:
550 SCFM
Solenoid Type: Floating poppet
Tubing Connection: 1/4” brass hose barb
Weight: 1.0 lbs. (.45 kg)
CONFORMANCE & TESTING:
RoHS Compliant
EMC Testing:
BS EN 55022:1998, BS EN 55024:1998,
EN 61000-3-3, EN 61000-4-2,
EN 61000-4-3, EN 61000-4-4,
EN 61000-4-5, EN 61000-4-6,
EN 61000-4-11
3.25" (82.55)
2.25” (57.14)
3.25"
(82.55)
2.75"
(69.85)
3.30"
(83.83)
(mm)
CAUTION: Do not use in explosive/hazardous environment or with flammable/combustible media.
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DN321.4
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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EP-321
MAMAC Systems is the leading global manufacturer of sensors, transducers, control peripherals
and web browser based IP appliances. MAMAC products are used for HVAC and environmental
controls, remote monitoring, alarming, energy metering and industrial automation.
All MAMAC products are manufactured in the USA.
WARRANTY: MAMAC Systems, Inc. and its subsidiaries (hereinafter referred to as MAMAC Systems) warrants its
products to be free of defects in material and workmanship for a period of five (5) years from date of shipment. If a
unit is malfunctioning, it must be returned to the factory for evaluation. A return authorization number (RMA) will be
issued by the customer service department and this number must be written or prominently displayed on the shipping
boxes and all related documents. The defective part should be shipped freight pre-paid to the factory. Upon examination by MAMAC Systems, if the unit is found to be defective, it will be repaired or replaced at no charge to the
customer. However, this warranty is void if the unit shows evidence of being tampered with, damaged during installation, misapplied, misused, or used in any other operating condition outside of the unit’s published specifications.
MAMAC Systems makes no other warranties or representations of any kind whatsoever, expressed or
implied, except that of title. All implied warranties including any warranty of merchantability and
fitness for a particular purpose are hereby disclaimed. User is responsible to determine suitability for
intended use.
LIMITATIONS OF LIABILITY: The remedies of buyer set forth herein are exclusive and the total liability of
MAMAC Systems with respect to this order, whether based on contract, warranty, negligence, indemnification, strict
liability or otherwise, shall not exceed the purchase price of the product upon which liability is based. In no event
shall MAMAC Systems be liable for consequential, incidental or special damages. MAMAC Systems
reserves the right to change any specifications without notice to improve performance, reliability, or function of our
products.
Every precaution for accuracy has been taken in the preparation of this manual, however, MAMAC Systems neither
assumes responsibility for any omissions or errors that may appear nor assumes liability for any damages that result
from the use of the product in accordance with the information contained in the manual.
DN321.4
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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