一般廠機的說明書裡面多會有平衡輸出相位註明,例如BMC說明書:For all B.M.C. units the below configuration is standard:PIN 1 = GND / GroundPIN 2 = + / Hot / 0°‐Phase (non‐inverted)PIN 3 = ‐ / Cold / 180°‐Phase (inverted)