Schneider Electric – TWDXCAISO – Modbus/RS‑485 Tap Isolation Box for Twido/M258

Main Features

• Purpose & Compatibility

  • Tap‑off isolation module for Schneider Twido and Modicon M258 PLCs’ RS‑485 serial link  .

  • Enables branching and tap‑off connections on pre‑polarized RS‑485 lines.

   

• Power & Wiring

  • Requires external 24 V DC supply.

  • Features a screw terminal block plus two RJ45 ports—one for line pass-through, one for tap‑off  .

   

• Built‑in Line Termination

  • Pre‑polarized bus (2 × 620 Ω) and built‑in 120 Ω termination plus 1 nF for proper fieldbus line integrity  .

   

• Mounting & Form Factor

  • Compact DIN‑rail mount (35 mm symmetric rail), weighing approx. 0.1 kg  .