User Manual

2
CHAPTER 1: INTRODUCTION AND SPECIFICATIONS
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1.1 INTRODUCTION
The AlertWerks 4-20 mAmp signal converter is used to integrate the gateway with a 4-20 mAmp transmitter. 4-20 mAmp
technology is used to communicate analog signals over long distances where electrical interference is a problem. This
solution is often used in the process control industry to collect the analog values from a wide array of remote sensors.
Current signals are much less susceptible to noise than voltage signals. A voltage signal can be converted to current and
then broadcast over a long distance before it is converted back to voltage and read by the unit.
4-20 mA transmitters are common in the industry for use with high quality sensors. With the AlertWerks 4-20 mAmp
converter, these sensors can now be integrated into the gateway, enhancing their value with the addition of graphing,
web interface, email interface, thresholds, and limits.
The accuracy of our 4-20mA converters is 2%.
The resolution of our 4-20mA converters is 0.1mA.
You can use these figures in conjunction with your sensor’s accuracy to find the overall precision of your readings.
You can also calibrate the AlertWerks 4-20mAmp converter.
One popular OID for the 4-20 mAmp Converters is the current reading. For a 4-20 mAmp Converter plugged into
RJ-45#1 that OID is: .1.3.6.1.4.1. 3854.1.2.2.1.17.1.3.0
1.2 SPECIFICATION AND FEATURES
 LED INDICATORS ON CONVERTER SHOW CONNECTION TO UNIT
 THE CONVERTER CONNECTS TO THE GATEWAY USING STANDARD CATx CABLE.
 POWER SOURCE: POWERED BY THE UNIT. NO ADDITIONAL POWER NEEDED.
 THE GATEWAY AUTO DETECTS THE PRESENCE OF THE 4-20MA CONVERTER.
 FULL AUTOSENSE INCLUDING DISCONNECT ALARM
If you need any further information or help with using your unit, contact us at [e-mail].