Drive Selection Memo — 1SBL136001R2101 AF09Z-30-01-21
This ABB AF09Z-30-01-21 is a 3-pole contactor with a 60 V dc coil, rated at 7 A and 4 kW on a 690 V ac line. The 60 V dc coil is the key spec for anyone working with DC control circuits in mill environments — it avoids the voltage drop issues you get with AC coils on long DC runs near variable-frequency drives. The 3NO main contacts handle the motor load; the 30-01-21 auxiliary configuration gives you one normally-open plus one normally-closed aux contact for feedback or interlocking.
Panel Integration — Wiring Practice Note
Snap-on DIN rail mounting is standard for the AF09Z frame. The 60 V dc coil draws its holding current through the ABB electronic coil interface, which means it's tolerant of voltage dips common on DC supplies fed from rectified AC drives. Terminate the coil supply with proper polarity — the electronic interface is polarity-sensitive, unlike an AC coil. The 7 A rated current at 690 V ac is adequate for small motor loads (up to 4 kW) or resistive heating elements in a mill control panel.