3
TIP: A single hall effect sensor can be used to measure current at different ranges. By passing a wire through the
sensor loop repeatedly (looping the wire around), the range of the sensor will be divided by the number of times the wire
passes through. For a 100A AC sensor, for example, two passes will reduce it by 100/2 (range of 0-50A), three passes
will reduce it by 100/3 (range of 0-33A), and so on. See example below. If you need to increase the sensitivity of your
sensor, this is a way to do so.
Installation Note:
Hall Effect sensors can be rated AC Current-only, DC Current-only, or AC/DC current compatible. Sensors
rated for DC current will include a directional current flow arrow either on the label or on the body of the sensor, indicating that
current flowing in that direction will be reported by the sensor as positive current flow. When installing a hall effect sensor to a DC
circuit, you will want to install it oriented such that the arrow points in the direction you want represented as positive current flow
on the status page for that sensor.
3. Connect a 18-24AWG CAT5/5e/6 patch cable (up to 1,000 feet long) between the “Cat x” port on the E-ACDCLM and an “RJ45
Sensor” port on the SYSTEM. (The use of smaller gauge CATx cabling will result in shorter distances that can be spanned.)
Note: Each row of RJ45 Sensor connectors (1-8 and 9-16) is rated for a combined load of 500mA at 12VDC. Each
E-ACDCLM uses 66mA. When applying sensors, be sure that the total load on each row does not exceed 500mA at
12VDC or failure of the SYSTEM or may result.
4. Configure the SYSTEM to react to changes in the voltage and/or current from the source(s), as desired. See examples on
the following pages.
Positive current flow
indicator
