==== Relay Wiring – ReadBack Relays with STO ====

//Only for GRNbms_MK3_HV_STO//
=== Wiring Diagram ===

This diagram shows how to wire the relays with state feedback using 4 SPDT contacts per side (positive and negative). Feedback is routed through RB1–RB8 lines, each color-coded for clarity. The relays directly switch battery plus and minus without any precharge stage.

{{:mk3:relayreadback.jpg?nolink&600|relayreadback.jpg}}

{{:mk3:readbackpinout.png?nolink&600}}

=== Safety Notes ===

  * **Relay coils must operate at 12 V.**
  * **Recommended relay type: C320K/1000**
  * **Only handle feedback wiring with HV disconnected!**
  * **Check wiring regularly for secure connections.**
=== STO Output (not shown in diagram) ===

A separate 24 V STO output is available for controlling inverters or similar devices. \\ **Refer to your inverter’s documentation for proper connection details.**