Unterschiede

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--- mk3:lvrelays [2025/04/07 18:05] – angelegt grnbms_tech
+++ mk3:lvrelays [2025/06/25 09:55] (aktuell) – [Relay Control] grnbms
@@ Zeile 4: / Zeile 4: @@
 It is intended for 12 V or 24 V systems and uses the **"Jump Start" 12 V input** for powering the BMS.
-{{false?nolink&|LV Relay Wiring Diagram}}
+''⚠️ **Voltage Range:** The BMS accepts only **10 V to 17 V** at the Jump Start input.\\
+If your battery voltage is outside this range (e.g. 24 V system), you **must use a DC-DC converter** to step the voltage down to a safe level.''
-==== 🔧 Components Overview ====
+''💡 Using too high a voltage on the 12 V input can **damage the BMS**!''
-  *
+''🔥 Always follow safety guidelines and consult a professional installer.\\
+Incorrect wiring can cause **damage, malfunction, or fire**. Use at your own risk.''{{:mk3:screenshot2025-04-07200216.png?nolink&793x418}}
-**HV Battery:**  Supplies the low-voltage system (e.g. 12 V / 24 V)
+==== Components Overview ====
-  *
-**Fuse:**  Protects the entire system from overcurrent
+  * **HV Battery:**  Supplies the low-voltage system (e.g. 12 V / 24 V)
-  *
+  * **Fuse:**  Protects the entire system from overcurrent
+  * **HV Relay Precharge:**  Routes current through the precharge resistor to limit inrush
+  * **HV Relay Positive:**  Connects main power after precharge
+  * **HV Relay Negative:**  Closes the negative path to the load
+  * **Precharge Resistor:**  Limits inrush current to the inverter during startup
+  * **Current Shunt:**  Measures current flowing to the inverter
+  * **Inverter:**  The main load (can be any DC consumer)
+  * **Jump Start Input:**  Powers the BMS directly with 12 V via GND / 12 V input pins
+==== BMS Power Supply (LV Mode) ====
-**HV Relay Precharge:**  Routes current through the precharge resistor to limit inrush
+  * Connect **12 V**  to the **Jump Start**  input on the BMS
-  *
+  * The BMS uses this input to power itself – **no high voltage required**
-**HV Relay Positive:**  Connects main power after precharge
+==== Relay Control ====
-  *
-**HV Relay Negative:**  Closes the negative path to the load
-  *
-**Precharge Resistor:**  Limits inrush current to the inverter during startup
-  *
-**Current Shunt:**  Measures current flowing to the inverter
-  *
-**Inverter:**  The main load (can be any DC consumer)
-  *
-**Jump Start Input:**  Powers the BMS directly with 12 V via GND / 12 V input pins
-==== 🔌 BMS Power Supply (LV Mode) ====
-  *
-Connect **12 V**  to the **Jump Start**  input on the BMS
-  *
-The BMS uses this input to power itself – **no high voltage required**
-==== 🧠 Relay Control ====
 The BMS controls all three relays directly via its outputs:
-  *
+  * Precharge relay closes briefly to limit inrush
+  * Positive and Negative relays close after precharge completes
-Precharge relay closes briefly to limit inrush
+  * The BMS monitors all timing and status automatically
-  *
-Positive and Negative relays close after precharge completes
-  *
-The BMS monitors all timing and status automatically
-==== ⚠️ Important Notes ====
-  *
-**Termination resistor**  and **CAN wiring**  must still be set correctly
-  *
-**Precharge path must include the shunt**  to allow current monitoring during startup
-  *
-This wiring is intended for **LV systems only**  – use HV wiring for 150–1200 V setups
-''🔥 Always follow safety guidelines and consult a professional installer. \\ Incorrect wiring can cause **damage, malfunction, or fire**. Use at your own risk.''
+👉 We recommend using relays with economizer to avoid unnecessary load on the BMS power supply