(AI KB) Bullhorn RM4011, RM4015 and RM4020: Before You Install, Mounting and Ground

Use this article when you service or install an older Bullhorn RM4011, RM4015 or RM4020. It covers site checks, mounting and the unit ground.

Applies to: Bullhorn RM4011, RM4015 and RM4020.

Site checks for all three models

  • Leave enough room to open the enclosure easily. The enclosure must be opened to configure the unit.
  • The antenna or satellite terminal location must be clear of obstructions such as buildings, trees and hills.
  • It must have a clear line of sight facing the sky to the south.
  • It must be at least 2 feet above the solar panel, to prevent signal interference during data transmissions.
  • Use only accessories that meet American Innovations specifications.

Mount an RM4011 or RM4015

The unit can be mounted inside or outside the rectifier case with the optional mounting brackets.

  1. Use a Phillips head screwdriver to attach one of the four plastic brackets from the accessory kit to each corner of the enclosure.
  2. Hold the enclosure against the flat surface where you will mount it, and mark the bracket hole locations.
  3. Set the enclosure aside and drill the four holes with a bit that suits the surface (metal, masonry or wood).
  4. Secure the unit to the mounting surface.

Mount an RM4020

  • Mount the enclosure in a clear, unobstructed area with enough working space to open it for maintenance and configuration. Mounting hardware is included with the enclosure.
  • Install the antenna at least 2 feet above the solar panel.

Ground an RM4020

  1. Attach the ground wire to the ground connection screw on the unit.
  2. Connect the other end of the ground wire to the rectifier frame with spade connectors.
  3. If needed, use an I-beam clamp to secure the spade connectors. Remove any paint where the clamp attaches to the frame.

RM4020 input channels

  • Channels 1, 3 and 4: analog, plus or minus 5 V DC.
  • Channel 2: analog, plus or minus 100 V DC.
  • Channels 5 and 6: digital. Channel 5 can also be used as an accumulator.

Note: because installation and grounding methods vary, American Innovations cannot warranty damage to equipment caused by lightning strikes.

For any wiring questions, submit a technical support ticket at https://www.aiworldwide.com/contact-support/.

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