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620-0012 R2a © Micro

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 ex, LLC 2015

General Description

The Field Tools 24V Supply provides portable power to loop powered devices. 
It is a fully contained power source that takes the low voltage from three “AAA” 
alkaline batteries and increases it to a highly 

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 ltered 24 volts DC. Using batteries 

for the power source eliminates isolation concerns as well as the need for a 
power connection to AC or a USB port. The voltage conversion is done using 
a high ef

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 ciency switching DC-DC converter to maximize battery life.  Simply 

connect the two mini-clips to the power input of your loop powered device.  
A push-button is used to enable or disable the 24 volts while a status LED 
indicates the active operating mode. An internal 250 ohm loop resistor, HART 
protocol modem clip points, and current meter leads with standard banana jacks 
make the 24V Supply a complete loop transmitter power solution. 

101-0028

24V Supply

Field Tools

Operation &

Specifications

Manual

Summary of Contents for 101-0028

Page 1: ...r connection to AC or a USB port The voltage conversion is done using a high efficiency switching DC DC converter to maximize battery life Simply connect the two mini clips to the power input of your loop powered device A push button is used to enable or disable the 24 volts while a status LED indicates the active operating mode An internal 250 ohm loop resistor HART protocol modem clip points and...

Page 2: ...ication is noticed flashing status LED while connected Always disconnect all leads and connections to the 24V Supply before removing the battery cover Highly filtered 24 volt power source for loop devices Up to 30mA capacity perfect for 4 20mA transmitters Battery power eliminates galvanic isolation concerns Includes an internal 250 ohm loop resistor to allow for HART protocol HART modem mini grab...

Page 3: ...ansmitter See Figure 2 Device Connections for details The transmitter can be powered with or without the milliamp meter connected The power loop is not opened when the meter is removed or not attached With the 24V Supply clips attached to the transmitter press the 24V Supply con nect button to enable power to the transmitter The status LED will be ON while the 24V Supply output is active If the LE...

Page 4: ...ovided next to the current meter leads The loop terminals allow standard HART modem mini clips to be easily connected across an internal 250 ohm loop resistor MIN MAX RANGE REL Hz AutoHOLD Peak MIN MAX 4 DIGITS 1 Second C F OFF mA A mV V V A A mA COM V 400mA FUSED 10A MAX FUSED A LO LO Connect a milliamp meter to the shielded banana jack leads to monitor loop current Removing the current meter doe...

Page 5: ...etected the LED will be ON solid LED Fast Flash then Off If an over current condition is detected more than 30mA or shorted the output will be disconnected and the led will flash for about 2 seconds Remove the overload or shorted condition and press the connect button to restore the active output LED Slow Flash A slow flashing status LED indicates that the output is connected but the internal supp...

Page 6: ... Connection Type clip loop terminals 087 x 055 hole 250Ω Loop Resistor Included internally Battery Type 3 x 1 5V AAA alkaline Operating Life 6 hours with 12mA load Battery Supply Range DO NOT USE 3V CELLS 2 0V to 5 5V Low Battery Indicator Status LED will flash slow while output is active Low Battery Level 2 49V Auto Off duration 30 minutes Enclosure Molded ABS Plastic Weight including leads and b...

Page 7: ... 1 125 28 58 mm 3 250 82 55 mm 1 700 43 18 mm CURRENT METER CURRENT METER 36 915 mm 24 610 mm BATTERY COVER SCREWS CONNECT BUTTON STATUS LED HART CLIP LOOP POWER LOOP POWER Dimensions Figure 3 Dimensions ...

Page 8: ...ES NO WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CUSTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF MICROFLEX LLC SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER MICROFLEX LLC WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA PROFITS USE OF PRODUCTS OR INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILIT...

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