Bsmce04u-pp Manual [best] Info

You can find the specific DrufelCNC BSMCE04U Installation Manual on their official site. Critical Troubleshooting Tips

Standard practice is to ground the negative rail. However, the : “For redundant parallel operation, do not connect V- to ground at more than one point.” Violation creates ground loops and erratic error E-103. bsmce04u-pp manual