Crystal 24VDC Loop Power Supply User Manual

24VDC Loop

Power Supply

Operation Manual

INTRODUCTION

The 24VDC Loop Power Supply (24VDCPS) is a portable, battery-powered, loop power supply and is ideal for sites where power is unavailable. The low noise

regulated output is suitable for use with smart transmitters. Power is automatically turned o when load is removed, preserving battery life. Outputs feature

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short circuit protection. Three LEDs indicate power, low battery, and fault status. A protective boot and two AA batteries are included.

QUICKSTART/OPERATION DIAGRAM

24VDC Loop Power Supply Operation Manual  1

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24 VDC output. Observe correct polarity.

Press to turn power on when connected to loop.

Must be connected to a load for On Key to function.

Output Terminals:

On Key:

LED signals:

On when loop is powered.



On when batteries are nearing depletion.



To avoid damage to rechargeable batteries, remove

when this LED is illuminated. Refer to the Approximate

Battery Life table on page 2 for battery life estimations.

On when unable to maintain 24V output.



A depleted battery, short circuit, or low loop impedance will

cause this LED to illuminate.

Auto-O & Power Hold Function

When the loop is connected, press the On key to enable the output voltage. The 24VDCPS does not have an O switch. When testing is complete, simply

disconnect the loop and the unit will turn o automatically. If the loop is re-connected within approximately 30 seconds, the unit will power on automatically.

BATTERIES

The 24VDCPS uses 2 AA batteries. Recommended batteries are Lithium (non-rechargeable), Alkaline, or NiMH (rechargeable). To avoid damage by over-dis-

charging, rechargeable batteries should be removed when the Low Battery LED

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the Red Fault LED

cold weather operations.

Typical Battery Life (Conditions: 12 mA loop current, 23° C)

() illuminates, at which time the output voltage will have fallen below 24 V. Lithium batteries are recommended for best performance in

() illuminates. Non-Rechargeable batteries may continue to be used until

24VDC Loop Power Supply Operation Manual  2

Battery Chemistry Type Examples Typical Battery Life (hours)

Lithium Non-Rechargeable Energizer Ultimate

Rayovac Max Plus 815

Alkaline Non-Rechargeable

NiMH Rechargeable Energizer Recharge 9 Remove batteries immediately

NiMH (Low Self Discharge) Rechargeable Sanyo Eneloop 7.5 Remove batteries immediately

CAUTION: Do not use AA sized, 3.6 V Li-Ion batteries in the 24VDCPS. Doing so will damage the device.

!

Battery Replacement

Remove the protective boot and slide the battery cover o. Replace the batteries, taking care to note the correct polarity.

For best results, always replace batteries in pairs. Do not mix fresh and old batteries or batteries of dierent types.

CAUTION: To avoid damage by over-discharging, rechargeable batteries should be removed immediately when the Low Battery LED () illuminates.

!

Duracell MN1500

Energizer E91, EN91

14.5

(10 hrs at -20° C)

6

Low Battery Indication

2 minutes remaining at 24 V output

5 minutes until output drops below 18 V

30 minutes remaining at 24 V output

40 minutes until output drops below 18 V

()

ELECTRICAL SPECIFICATIONS

Output Voltage . . . . . . . . . . . . . . . . . .24 VDC +/- 2%

—

Output Voltage Ripple . . . . . . . . . . .< 14 mV rms

Load Regulation . . . . . . . . . . . . . . . . . 1%

Rated Output Current . . . . . . . . . . . . 25 mA

Short Circuit Protection . . . . . . . . . . Continuous

Connections . . . . . . . . . . . . . . . . . . . . .4mm banana jacks

Operating Temperature . . . . . . . . . . -20 to 50°C (-4 to 122°F)

Storage Temperature . . . . . . . . . . . . -40 to 75°C (-40 to 167°F)

Operating Humidity . . . . . . . . . . . . .95% Relative, non-condensing

Power Supply . . . . . . . . . . . . . . . . . . . . 2 x AA batteries (alkaline 1.5 V included)

MECHANICAL SPECIFICATIONS

Overall Dimensions . . . . . . . . . . . . . . 4.8" x 3.1" x 1.2"

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Weight . . . . . . . . . . . . . . . . . . . . . . . . . . 200 g (0.44 lbs) including alkaline batteries

24VDC Loop Power Supply Operation Manual  3

ENCLOSURE

Rating . . . . . . . . . . . . . . . . . . . . . . . . . . .IP40

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Housing . . . . . . . . . . . . . . . . . . . . . . . . .ABS

Protective Boot . . . . . . . . . . . . . . . . . .Silicone Rubber

CERTIFICATIONS

The 24VDCPS has been tested and certied to comply with a variety of international standards.

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We declare that the 24VDCPS is in accordance with the Electromagnetic Compatibility Directive per our declaration.

ORDERING INFORMATION

P/N 24VDCPS KIT 24 VDC Loop Power Supply plus the P/N 1351 Test Lead Set

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P/N 24VDCPS 24 VDC Loop Power Supply

P/N 1351 Test Lead Kit

Two 4 mm shrouded banana plug, straight to right angle, 122 cm (48 inch) leads with alligator clip and spring loaded hook tip probes.

EMC EC DECLARATION OF CONFORMITY

Manufacturer’s Name:

Crystal Engineering Corporation

Manufacturer’s Address:

708 Fiero Lane, S uite 9
USA

Product Name:

24VDC Loop Power Supply Series

Model Number:

24VDCPS

EMC Directive 2004/108/EC

Standard

EHSR

EN 55011:2007

EN 55011:2009/A1:2010 harmonized standard has been compared to the
the art” apply to the equipment. (1)

EN 61326: 2006

Harmonized

Standard

Description

Class

Status

EHSR

EN 55011: 2007

Radiated Emissions

Class B

Pass

See (1)

EN 61326-1:2006 (EN 61000-4-2: 2009)

Electrostatic Discharge

Criteria A

Pass

Harmonized

EN 61326-1:2006 (EN 61000-4-3: 2006)

Radiated Immunity

Pass

Harmonized

USA Signatory:

European Signatory:

Crystal Engineering Corporation, an AMETEK Inc. company
[phone]

AMETEK Denmark A/S
[phone]

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DECLARATION OF CONFORMITY

According to ISO/IEC 17050-1:2010

An AMETEK Inc. company

San Luis Obispo, CA 93401

Declares under sole responsibility that the product as originally delivered

Complies with the essential requirements of the following applicable European Directives, and carries the CE marking
accordingly:

standard used for certification purposes and no changes in the “state of

And conforms with the following product standards:

24VDC Loop Power Supply Operation Manual  4

I hereby declare that the equipment named above has been designed to comply with the relevant sections of the above referenced
specifications. The unit c om p lies with all essential requirements of the Directives

______________________________

Division Vice President & Crystal Business Manager

David K Porter, P.E.

708 Fiero Lane, Suite 9, San Luis Obispo, CA 93401, US A

11 March 2014

Gydevang 32-34, 3450Allerød, Denmark

CONTACT US

Phone . . . . . . . . . . . . . . . . . . . . . . . . . .[phone]

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Toll-Free . . . . . . . . . . . . . . . . . . . . . . . . [phone]

Fax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [phone]

Email . . . . . . . . . . . . . . . . . . . . . . . . . . [e-mail]

Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . .crystalengineering.net

TRADEMARKS

This manual contains the following third-party trademarks, both registered and unregistered. All marks are the property of their respective companies.

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Rayovac® and Maximum Plus™ .................Rayovac Corporation

Duracell® ......................................Duracell Inc. Corporation

Energizer® and Eveready .......................Eveready Battery Company, Inc.

Sanyo Eneloop™ ...............................SANYO Component Europe GmbH

“Pressure is Our Business” is a registered trademark of Crystal Engineering Corp.

24VDC Loop Power Supply Operation Manual  5

WARRANTY

Crystal Engineering Corporation warrants the 24VDCPS to be free from defects in material and workmanship under normal use and service for one (1) year from

date of purchase to the original purchaser. It does not apply to batteries or when the product has been misused, altered or damaged by accident or abnormal

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conditions of operation.

Crystal Engineering will, at our option, repair or replace the defective device free of charge and the device will be returned, transportation prepaid. However, if

we determine the failure was caused by misuse, alteration, accident or abnormal condition of operation, you will be billed for the repair.

CRYSTAL ENGINEERING CORPORATION MAKES NO WARRANTY OTHER THAN THE LIMITED WARRANTY STATED ABOVE. ALL WARRANTIES, INCLUDING IMPLIED

WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, ARE LIMITED TO A PERIOD OF ONE (1) YEAR FROM THE DATE OF PURCHASE.

CRYSTAL ENGINEERING SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, TORT OR OTHERWISE.

Note: (USA only) Some states do not allow limitations of implied warranties or the exclusion of incidental or consequential damages, so the above limitations

or exclusions may not apply to you. This warranty gives you specic legal rights and you may have other rights which vary from state to state.

4805.D

© 2014 Crystal Engineering Corporation

708 Fiero Lane, Suite 9, San Luis Obispo, California 93401-8701