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Electropneumatic Fail Safe
Model EP-350
sAccepts either 24 VAC or 24 VDC
sCan handle up to four transducers
sFeatures isolated pneumatic ports
that prohibit pressure mixing
sInterfaces with EP-311/313
electropneumatic transducers to provide
fail safe bleed to zero pressure
RoHS
The EP-350 interfaces with up to four separate EP-311/313 electropneumatic transducers to ensure fail safe bleed to zero pressure. The EP-350
solenoid holds a transducers’s bleed port closed until power is lost and then
opens the port, which allows the branch ports of all connected transducers
to exhaust pressure upon power failure. The EP-350 incorporates an aluminum block manifold that is fitted with four 1/4-inch brass hose barbs and a
single power solenoid. By connecting transducers’ branch lines to the
EP-350’s four hose barbs, pressure ports are kept isolated from one another
to ensure that no pressure mixing occurs across pneumatic ports. To power
the EP-350, apply either 24 VDC or 24 VAC to the EP-350’s two-position
terminal block. To provide a pneumatic connection, tee a line of 1/4-inch
poly tubing from one of the EP-350’s four 1/4-inch hose barbs to the branch
line output of an electropneumatic transducer.
DN350.3
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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SPECIFICATIONS:
EP-350
Supply Voltage: 18 to 28 VAC/VDC
Operating Temperature: 32°F to 160°F
(0° to 70°C)
Storage Temperature: -40°F to 212°F
(-40° to 100°C)
Manifold Material: Aluminum
Solenoid Type: Floating poppet
Bracket Material: 16 Ga. Steel
Bracket Finish: Enamel painted PMS#2GR88B
Tubing connection: Brass hose barb
Weight: ½ lb. (¼ 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
ORDERING INFORMATION: EP-350
CAUTION: Do not use in explosive/hazardous environment or with flammable/combustible media.
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DN350.3
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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EP-350
DN350.3
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® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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EP-350
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.
DN350.3
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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