The ABB S200-TB3 490176063, also cataloged as the S200-TB3 Terminal Block, operates as a dedicated hardware component for field signal wiring and I/O module bus interface routing within ABB S200 I/O systems.

Hardware Nomenclature and Signal Interface

Configured as a modular DIN-rail terminal base, the ABB S200-TB3 490176063 routes field wiring to upper plugged-in I/O modules:

• S200-TB3: Standard model code specifying a 3-wire field termination base layout for 16-point I/O modules.
• 490176063: Alternate internal ABB part reference identifier (cross-referenced to legacy code 200-TB3).
• 16-Point Capacity: Provides physical screw or spring termination points supporting up to 16 individual process channels.
• 2/3-Wire Support: Built-in common voltage and return bus bars facilitate direct 2-wire and 3-wire field sensor terminations.

Structural and Electrical Specifications

Bus Communication Velocity & I/O Density Scaling

The terminal base features integrated backplane bus pass-through connectors that route logic power and communication signals between adjacent S200 modules. Backplane bus communication velocity handles high-density signal transfers across Profinet or EtherNet/IP deterministic networks without signal attenuation. Firmware flash compatibility across upper I/O modules ensures instant node recognition when snapped onto the terminal base.

Shipping Package Contents

• 1 x ABB S200-TB3 Terminal Block Unit
• 1 x Installation grounding clip pre-assembled
• 1 x Field terminal numbering strip insert

Field Installation & Wiring Rules

• Power Isolation: Disconnect system 24 VDC field power and 5 VDC backplane power before attaching or wiring the terminal block.
• DIN-Rail Assembly: Snap the terminal block securely onto a 35 mm DIN rail, ensuring the rear metal grounding spring contacts the rail.
• Wire Termination: Strip conductor ends to 7 mm and tighten screw terminals to recommended torque specs to ensure solid electrical contact.
• Adjacent Interlocking: Slide adjacent S200-TB3 bases together firmly to engage side-mounted backplane bus connectors prior to inserting I/O modules.

Frequently Asked Questions

• What sensor wiring configurations are directly supported by the S200-TB3?

  The unit provides dedicated terminals designed to accommodate both 2-wire and 3-wire field device wiring arrangements.

• Does the S200-TB3 terminal block consume logic bus current by itself?

  The terminal base is a passive interconnect device rated to pass through up to 640 mA at 5 VDC backplane logic power.

• Can an I/O module be removed from the S200-TB3 base without disconnecting field wires?

  Yes. The upper I/O module unlatches and plugs out directly, leaving all field signal wiring permanently attached to the base.

• How are backplane logic signals extended to adjacent I/O slots?

  Integrated side connectors pass backplane data and power continuously to adjacent terminal bases across the DIN rail stack.

• What alternate manufacturing part numbers correspond to model S200-TB3?

  This unit is cross-referenced under ABB part numbers 200-TB3 and 490176063.

• Is external grounding required for the terminal block assembly?

  Grounding is established automatically via the integral metal clip when mounted on a clean, properly grounded 35 mm steel DIN rail.

• What is the total channel density rating for a single S200-TB3 base?

  The base provides terminal capacity designed to interface with 16-channel input or output modules.

• How does the base maintain connection stability during industrial vibration?

  Built-in DIN-rail locking mechanisms and module latching guides hold the assembly securely against industrial mechanical shock.