The Allen-Bradley 1794-TB62DS is an ultra-high-density, 62-pin D-Shell terminal base unit designed for the Flex I/O 1794 modular platform. Unlike standard terminal bases that rely on individual screw or spring-clamp terminals, this unit features a high-density DB-62 D-Sub female connector interface. It serves as the mechanical and electrical foundation for multi-point discrete and analog Flex I/O modules, facilitating rapid deployment and simplified maintenance.
By consolidating field wiring into a single pre-fabricated cable harness, the 1794-TB62DS significantly reduces cabinet assembly time and minimizes wiring errors. It is an ideal solution for high-density I/O applications where space is constrained and rapid module replacement is required.
Features
High-Density Interface: Equipped with a 62-pin D-Shell (DB-62) female connector for streamlined multi-core cable connectivity.
Dual Power Zones: Supports independent V1 and V2 power routing, allowing for flexible voltage source management within a single base.
FlexBus Integration: Features an integrated backplane rail to pass system data and logic power horizontally across the rack.
Mechanical Interlock: Includes a rotatable keyswitch guide to ensure correct module alignment and prevent improper installation.
Robust Construction: Rated for a 10 A aggregate current capacity with a 5 A per-pin threshold.
Applications
The 1794-TB62DS is widely utilized in industrial automation environments requiring high-density signal termination, such as:
Remote I/O marshalling panels.
Automated assembly lines and material handling systems.
Complex process control skids requiring rapid I/O reconfiguration.
Control cabinets with limited space for traditional terminal blocks.
Technical Specifications
Parameter
Specification
Model
1794-TB62DS
Connection Type
62-Pin D-Sub Female
Max Current (Aggregate)
10 A
Max Current (Per Pin)
5 A
Nominal Voltage
24 V DC
Mounting
35 mm DIN-Rail
Operating Temperature
0 to 55 degC
Weight
0.17 kg
Installation Guidelines
Mounting: Snap the base unit directly onto a standard 35 x 7.5 mm Top-Hat DIN-rail. Ensure the unit is securely seated.
ESD Precautions: Always handle the module using proper electrostatic discharge (ESD) prevention techniques to protect internal circuitry.
Power: Ensure all system power is disconnected before installing or removing modules from the base.
Wiring: When connecting the D-Shell cable, ensure the connector is fully seated and the mounting screws are tightened to a torque of 0.6 Nm (5 lb-in) to maintain a gas-tight connection.
Keyswitch: Verify the mechanical keyswitch is set to the position corresponding to the intended I/O module before mating.
