OVERVIEW

Official designation: Allen-Bradley 1797-TB3S (FLEX Ex I/O, I/O Terminal Base Module)

Role/Application: Provides secure spring-clamp field wiring termination and backplane bus connection for Intrinsically Safe FLEX Ex I/O modules.

KEY SPECS SUMMARY

Power: Flexbus rated below 10 V DC

Interfaces / Ports: 52 terminals, 3 wire

Indicators: N/A

Operating Temp: Minus 20 to 70 degrees C

Platform / Compatibility: FLEX Ex I/O, DIN rail mount

Limit: IP20 enclosure rating

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the mechanical dimension of the 1797-TB3S unit including its depth?

A: The unit dimensions are 94 millimeters high, 94 millimeters wide, and 69 millimeters deep.

Wiring & Installation:

Q: What type of wiring connection mechanism is used on the 1797-TB3S terminal base unit?

A: The unit features a spring-clamp mechanism for secure wire termination.

Troubleshooting & Compatibility:

Q: What component secures the mounted I/O module to the terminal base?

A: A module locking latch is used to secure the I/O module to the base unit.

Replacement & Upgrades:

Q: Is a direct replacement module available from Rockwell Automation for the discontinued 1797-TB3S?

A: No planned replacement is offered by Rockwell Automation for the discontinued FLEX Ex Terminal Base.