Detailed Answer
Key count selection for warehouse equipment: electric hoists (hoist + travel) 6 keys (LD-6SK); overhead cranes (hoist/trolley/bridge) 8-10 keys (LD-8SK/LD-10DK); complex equipment (+ auxiliary hook) 12 keys. Principle: number of motions + E-stop + spare. The LDER LD series covers 6-12 keys; XINGJIA likewise. Better to have more keys than fewer (leave room for expansion).
| Hoist | 6 keys |
| Crane | 8-10 keys |
| Complex | 12 keys |
Note:Base the key count on the equipment motion list and reserve margin.