Allen-Bradley 1734-CTM POINT I/O Common Terminal Module

The Allen-Bradley 1734-CTM, also cataloged as the 1734-CTM Common Terminal Module, operates as a dedicated hardware component for shared field-device termination and common distribution within POINT I/O networks. The module provides eight common terminals, supports 3-wire field device wiring, and installs directly onto compatible POINT I/O terminal base assemblies without active signal processing functions.

Hardware Specifications

I/O Density Scaling and Terminal Distribution

The 1734-CTM functions as a passive termination component within the POINT I/O architecture. By providing eight shared common terminals, the module simplifies field wiring arrangements for compatible 3-wire devices while maintaining a compact single-slot footprint.

The module does not consume PointBus current and performs no signal conversion, processing, or network communication. Its role is limited to common terminal distribution and field-side termination support. Integration with POINT I/O assemblies is accomplished through compatible terminal base units including the 1734-TB and 1734-TBS platforms.

Frequently Asked Questions

Q: Does the 1734-CTM consume PointBus current?
A: No. The module is specified with no PointBus current requirement because it operates as a passive terminal component.

Q: Does the 1734-CTM provide signal conditioning or I/O processing?
A: No. The module serves as a common terminal distribution device and does not perform signal conversion, communication, or control functions.

Q: Which terminal bases support installation of the 1734-CTM?
A: The module is compatible with POINT I/O terminal base assemblies including 1734-TOP, 1734-TOPS, 1734-TB, and 1734-TBS.

Field Installation Guidelines

• Verify that the selected terminal base assembly matches the supported installation configurations before mounting the module.

• Install the module on a properly secured DIN rail according to POINT I/O mechanical assembly procedures.

• Ensure field common conductors are correctly identified prior to termination to prevent unintended cross-connections.

• Route field wiring separately from high-energy power conductors where practical to reduce electrical interference.

• Confirm that field-side current does not exceed 2 A per point or 4 A per module.

• Tighten terminal connections according to the wiring base specifications to maintain conductor retention and electrical continuity.

• Inspect grounding and shielding practices throughout the control panel before energizing connected field devices.