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Wiring connection of the high-power relays for BMS123 Smart
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Wiring connection of the high-power relays for BMS123 Smart The two diagrams show the wiring connection for the contactors connected to the OUT-BOARD of the BMS123 Smart. The first situation shows the wiring of the “middle power” contactors (R1, R2). When the contactor coils work with safety voltage (<48V) and the current rating is bellow 2 Amp, the contactors may be controlled from the OUT-BOARD on-board relays. The second situation is for the “high power” contactors. If the contactors coils work with a high voltage (>48V) or high currents (>2Amp), you need to have a separational auxiliary relays (contactors or solid state-relays) - SR1 and SR2. Note: do not forget about using the reversed diode (aka anti-parallel diode) to avoid damage to contacts or semi-coductor components- | |
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