Omron NT20S-ST121B-EV3 User Manual page 48

Connecting Link Adapters and RS-422A Converters
• Connect the shield wire at both ends of the cable carrying RS-422A/485
signals to ground, and ground the ground terminal on the Power Supply
Unit of the CPU or Expansion Rack to 100 Ω max.
1. Taking care not to damage the shield, strip between 30 and 80 mm of
sheath off the end of the cable.
30 to 80 mm
2. Carefully twist the shield mesh together to form a single wire, and carefully
cut off the material surrounding the signal wires and any unnecessary sig-
nal wires.
3. Strip the sheath off the signal wires to a length sufficient to attach crimp
terminals. Apply vinyl tape or heat–shrinking tube to the sheathes and
stripped parts of communications lines.
4. Attach stick-type crimp terminals to ends of the signal lines and crimp them
using a crimp tool.
• Recommend crimp terminals:
Phoenix Contact
AI Series
AI-0.5-8WH-B (serial number: 3201369)
• Recommended crimp tool:
Phoenix Contact ZA3
With four-wire cables, insert two signal lines into each crimp terminal together
before crimping.
• Recommend crimp terminals:
Phoenix Contact
AI Series
AI-TWIN2 × 0.5-8WH (serial number: 3200933)
• Recommended crimp tool:
Phoenix Contact
UD6 (serial number: 1204436)
5. Connect the signal lines and the shield line to the RS-422A/485 terminal
block.
Section 2-3
27