Current Loop 1 (RMA-CL1-SEN)
Installation Note
AVTECH’s Current Loop monitors the electrical current flowing through a single-phase
powered cable. It outputs a signal of 0 to 5 VDC (volts of direct current), which your built-in or
external Room Alert Analog Sensor then converts into an amp (A) reading. By pairing a Current
Loop with your Room Alert monitor, you can easily determine
the power consumption of an electrical appliance / device.
Current Loop Package Contents
• One (1) Current Loop
• Two (2) #8 x ¾" TEK mounting screws
• One (1) 25' speaker wire cable
• One (1) Installation Note (You’re reading it now.)
Select An Input Range
Your Current Loop arrives with its jumper set on the largest input amperage range: 0 to 50 A.
You may select the High, Middle or Low range to match the power draw of the appliance /
device being monitored. This is important to get the most accurate readings possible.
High (H) ......................0 to 50 A
Middle (M) ..................0 to 20 A
Low (L) .......................0 to 10 A
To change the setting, pull the jumper up to detach it from the “H” pins; then push it back down
onto the “M” or “L” pins.
Install Your Current Loop
The Current Loop has a split core which opens to wrap around a single insulated conductor
running into an electrical box or to an appliance / device.
Consult with a qualified electrician before you begin.
Disconnect power to the equipment and cable before you begin.
Do not insert an exposed wire into the Current Loop.
Do not use the Current Loop in hazardous (classified) locations or life / safety applications.
Insert A Single Insulated Conductor Into Your Current Loop
1. Disconnect power to the insulated cord that you intend to monitor.
2. Open the Current Loop by either prying open the latch with a flat-tip screw driver or
pressing down on the two side tabs with your fingers to release the cover.
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Current Loop (RMA-CL1-SEN)
3. Wrap the Current Loop around a single
insulated conductor. Examples are
shown here.
4. Before you close the Current Loop,
check the surfaces of the magnetic core
to be sure they’re clear. They need
good contact for the Current Loop to
operate correctly.
5. Lock the Current Loop closed by
pressing the cover down firmly and
listening for the click.
Connect Your Current Loop To Room Alert
Your Current Loop comes with one end of the 25' speaker wire
already attached to its + / - contacts.
Follow these steps to attach the other end of the 25' speaker
wire to the input ports on your built-in or external Room Alert
Analog Sensor:
1. Separate and strip the free ends of the speaker wire. Expose about ¼" of wire.
2. Look at the + / - contacts on the Current Loop and note which
wire is attached to each contact.
3. Insert the unattached end of the “-” speaker wire into the
RIGHT dry contact of the Analog Sensor Input port.
4. Insert the unattached end of the “+” wire into the LEFT dry
contact of the Analog Sensor Input port.
Do not connect Current Loop or Room Alert dry contacts to live circuits.
Use only low-voltage 2-wire cable to connect your Current Loop to Room Alert.
Mount Your Current Loop
Mount the base of the Current Loop on a surface using the included self-drilling mounting
screws or snap it directly on to a 35 mm DIN rail.
Leave a minimum of 1" between the Current Loop and any other magnetic device(s).
Configure Your Current Loop
Navigate to Settings Æ Sensors in the web interface of the Room Alert, and then scroll down
to “Analog Sensor Settings.”
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Current Loop (RMA-CL1-SEN)
Configure “Analog Sensor 1” or “Analog Sensor 2” depending on which set of input contacts
you connected your Current Loop to.
Step 1: Enable Room Alert to calculate readings in amperage.
1. In the set of three fields to the right under “Analog Sensor 1” (or 2), click Enabled.
2. In “Max Value,” enter “10,” “20” or “50” to correspond to your Current Loop’s jumper
setting. Note that the number you enter here controls how Room Alert converts volts to
amps.
If you put the jumper on... In “Max Value,” enter...
High (0 – 50 A) .............................................50
Medium (0 – 20 A) .......................................20
Low (0 – 10 A) .............................................10
3. In “Measure Unit,” enter a label of up to 3 characters, such as “A” or “Amp,” to stand
for “amperage.” Note that this field is only a label; it does not affect the readings.
Step 2: Enable Room Alert to display and send alerts for the Analog Sensor.
1. In the set of four fields to the left under “Analog Sensor 1” (or 2), click Enabled. This
turns on the display of your Current Loop readings, both in the web interface and in
AVTECH’s Device ManageR software.
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Current Loop (RMA-CL1-SEN)
2. If you would like to receive email alerts at high and low thresholds, enter values (in
amps) in the “High” and “Low” fields.
These amperage values must correspond to the range you selected with the jumper on
your Current Loop:
If you put the jumper on... In “High” and “Low,” you may enter...
High (0 – 50 A) 0 to 50
Middle (0 – 20 A) 0 to 20
Low (0 – 10 A) 0 to 10
3. In “Sensor Label,” you may leave the default, “Analog Sensor 1” (or 2) or enter a more
descriptive label of up to 15 characters, such as “AC Power Draw.”
4. Click Accept Changes at the bottom of your screen.
5. Click Save Settings in the navigation bar to the left of your screen.
Current Loop Features & Specifications
Environment Condition Monitored .................. Electrical current (amps)
Type Of Sensor ................................................... Switch
Power Supply ...................................................... Induced from monitored conductor
Included Sensor Cable Type ............................. Low-voltage 2-wire speaker cable
Included Sensor Cable Length .......................... 25'
Maximum Sensor Cable Length ....................... 100'
Output Voltage ................................................... 0 to 5 VDC
Input Amperage Range ..................................... 0 to 50 A
Accuracy ............................................................. +/- 1.0% (2 to 100% FSO)
Response Time .................................................... < 100 mS
Operating Frequency Range ............................. 50 to 600 Hz
Isolation Voltage ................................................. 2,200 VAC
Maximum Sensing Current Voltage ................. 600 VAC
Aperture (Hole) Size .......................................... 0.75" (Accepts cables up to 350 MCM)
DIN Rail Size ...................................................... 35 mm
Operating Temperature Range......................... -15 to 40º C (5 to 104º F)
Operating Humidity Range ............................... 0 to 95% RH, non-condensing
Enclosure Rating ................................................ UL94-5VB
Compatible Products ........................................ Room Alert Analog Sensor (built-in or external)
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