Pump Start/Stop biCoder Installation Guide

Updated May 11, 2026 1 min read

Instructions for Using the BL-5201PR to Turn On a Pump Relay
Activating a Normally Open Relay

The BL-5201PR biCoder can also be used for the following:

  • Turn off a relay
  • Open a switch
  • Close a switch
  • Refer to the instructions on the back page for installation instructions for these alternate uses.

Note: Ensure Principle Splicing techniques. Polarity matters! All connections must have 3M™ DBR/Y-6 or equivalent connectors.

Principle Splicing Techniques

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1.  Connect the red and black wires on the biCoder to the red and black wires from the two-wire path that connects to the controller.

2.  Connect the gray wire from the BL-5201PR biCoder to one wire from the 24VAC transformer.

3.  Connect the other trasformer wire to the relay.

4.  Connect the white wire with the black stripe from the BL-5201PR biCoder to the common wire on the relay.

5.  Cap the gray wire with the black stripe.

6.  Configure the BL-5201PR in the controller.

BL-5201PR PUMP START/STOP RELAY biCODER INSTALLATION & WIRING DIAGRAM

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References

BL_BL-5201PR Pump Start Decoder_Spec Detail

BL_BL-5201PR Pump Start biCoder_Install Guide

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