Lynx Smart BMS Lynx Smart BMS battery BMS cable connection examples 5.4.4. Connect the Multiconnector The multiconnector is the green connector on the bottom of the Lynx Smart BMS. The connector of the Lynx Smart BMS 500A has 11 pins, numbered from left to right starting with pin 1 and ending with pin 11, while the connector of the Lynx Smart BMS 1000A has 13 pins - two additional pins (pin 12 and 13) for future functionality. Do not connect anything to pins 12 and 13. See the Appendix for a table with pin-out and description [44] . The multiconnector’s screw terminal can be pulled out of the Lynx Smart BMS, allowing for easy wiring.
The Remote on/off (pin 10 and 11) of the terminal are interconnected with a wire loop by default. If the Remote on/off connection is used with a simple on/off switch, remove the loop and wire as desired. 1 2 3 4 5 6 7 8 9 10 11 Multi connector Multiconnector location 5.4.5. Connect ATC/ATD-controlled loads and chargers The ATC (allow-to-charge) and ATD (allow-to-discharge) are potential free dry contacts of the multi-connector that can control chargers and loads in the system, provided they have a remote on/off connector and are wired appropriately. They can be used in several ways. A common example is by providing +12V wired from AUX + (equal to system voltage) to pin 3 and pin 5.
An active high signal is then delivered to the connected remote H ports of the chargers and loads via pin 4 respectively pin 6. In case of a low cell voltage, ATD opens the contact between pin 5 and pin 6. The load is then switched off and further discharge is prevented. If the temperature is too low to charge, the ATC contact between pin 3 and pin 4 opens and switches off the chargers. Instead of using system voltage on AUX +, system minus can be used on AUX - to generate an active L signal. The functionality is the same as described above, except that the low signal ensures that the loads and chargers are switched off.
This active L signal then can be connected to the remote L terminals of a charger or load. In contrast to the H signal, System minus is also present in case the contactor opens and the Lynx Smart BMS goes into OFF mode. Another option is to use the ATC and ATD contacts as remote switches, for example, to control a Smart BatteryProtect to turn off loads in the event of low cell voltage or a charger in the event of low temperature. See below examples for wiring: Page 11 Installation