ABB AC 31 Technical Manual page 89

Figure 4-3 : Correct bus cabling during an interruption
Figure 4-5 : Correct bus cabling
Figure 4-7 : Correct symmetrical twisted pair
Figure 4-9 : Bus shielding connection diagram
Page 4-6
Installation
Figure 4-4 : Incorrect bus cabling during an interruption
Figure 4-6 : Prohibited star bus cabling
Figure 4-8 : Incorrect twisted pair
ABB Control - AC 31
1SBC 260400 R1001-b 06.99