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PRO-AREL1-12V

Alarm box used for detecting high VSWR in antenna systems.
Description
  • PRO-AREL1-12V is an alarm box used for detecting high VSWR in antenna systems. The PRO-AREL1-12V is connected to a power monitor, e.g. PRO-PM2-2/70 25W, and this will enable you to adjust the power monitor so that the PRO-AREL1-12V gives an alarm signal at e.g. VSWR 2:1 at a certain frequency/power.
  • The alarm drives a latched relay and a light-emitting diode and that mode is active until the reset button is pressed.
  • It is possible to connect an external alarm such as light, loudspeaker etc. (max. 1 A, NC or NO on a contact rail).
Specification
Electrical
Power Supply 11 – 14 V
Model PRO-AREL1-12V
Type Alarm box
Current With Alarm 30 mA
Current Consumption 10 mA
Environmental
Operating temperature range -30 °C to +60 °C
Mechanical
Relay Contact NC/NO AC-DC 1A
Connection(s) Screw terminal and Phono connector
Historic Brand Procom
Dimensions 50 x 41 x 20 mm /
1.97 x 1.61 x 0.79 in.
Weight Approx. 0.11 kg / 0.24 lb.
Ordering Codes
Model Product No.
Alarm box used for detecting high VSWR in antenna systems. 210001186
Additional Information
FUNCTIONAL DIAGRAM
PRO AREL1 12V Diagram
 
  1. Connect PRO-AREL1-12V to PRO-PM2-… to REV ANT and connect
    12 V to PRO-AREL1-12V.
  2. Adjust the trimming potentiometer on PRO-PM2-… to minimum
    (anti-clockwise).
  3. Connect a load to the PRO-PM2-… corresponding to the VSWR
    required, e.g. 25 Ω VSWR 2:1.
  4. Connect the signal of the required frequency and power to
    PRO-PM2-….
  5. If the alarm is lighting, press RESET. If the alarm does not stop,
    adjust the trimming potentiometer on the PRO-PM2-2/70 to minimum and press RESET.
  6. Slowly adjust the trimming potentiometer on the PRO-PM2-…
    clockwise until the alarm starts.
PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-27 Version 1