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- Terminal Block
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- 80 × 24 × 14 mm
- 0.02 kg
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Product Overview
The Schneider TM5ACTB12 Modicon TM5 Terminal Block is a 12-contact connection accessory for the Modicon TM5 modular I/O system. It provides the wiring interface between field conductors and compatible electronic modules, allowing sensor signals, control wiring, and other electrical connections to be organized within a modular PLC assembly.
In a machine control cabinet, the TM5ACTB12 is used when a TM5 I/O slice requires a 12-contact terminal block. It is suitable for compatible 24 V DC discrete I/O modules, analog I/O modules, common distribution modules, remote transmitter modules, and counter modules. This makes it useful in systems where several types of field signals must be connected to a shared PLC platform.
The terminal block uses spring-clamp push-in technology rather than conventional screw terminals. Conductors can be inserted into their assigned terminals, and the release mechanism allows wiring to be removed during maintenance. Terminal identification, labeling options, and test-probe access also help technicians trace connections during commissioning and fault diagnosis.
The TM5ACTB12 is the white terminal-block version. It should be distinguished from the gray TM5ACTB12PS, which is intended for compatible power distribution and receiver modules. Although both versions have 12 contacts, their functions and supported module combinations differ.
The terminal block does not perform signal conversion or PLC processing itself. Its role is to establish the physical electrical connections required by the associated TM5 electronic module.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Model / Part Number | TM5ACTB12 |
| Product Family | Modicon TM5 |
| Product Type | Terminal Block |
| Accessory Category | Connection Accessory |
| Number of Contacts | 12 |
| Terminal Technology | Spring-clamp push-in |
| Color | White |
| Maximum Rated Voltage | 300 V, subject to the associated module’s ratings |
| Maximum Current | 10 A per connector, subject to the associated module’s ratings |
| Contact Resistance | ≤ 5 mΩ |
| Solid Conductor Cross Section | 0.08–2.5 mm² |
| Fine-Stranded Conductor Cross Section | 0.25–2.5 mm² |
| Conductor Cross Section with Ferrule | 0.25–1.5 mm² |
| Wire Release | Push-button |
| Test Access | Supports standard test probes |
| Terminal Identification | Labeling and plain-text identification support |
| Compatible Module Types | Compatible 24 V DC discrete I/O, analog I/O, common distribution, remote transmitter, and counter modules |
| Compatible Controller Families | Modicon M258 and Modicon LMC058 |
| Package Quantity | 1 piece |
| Dimensions | 80 × 24 × 14 mm |
| Weight | 0.02 kg |
Product Features
- 12-contact wiring interface: Provides more connection points than the six-contact TM5ACTB06 for compatible I/O configurations.
- Spring-clamp push-in terminals: Simplifies conductor installation without conventional screw-terminal tightening.
- Push-button wire release: Allows conductors to be disconnected during authorized maintenance and wiring changes.
- White terminal-block construction: Matches compatible white TM5 bus-base and electronic-module assemblies.
- Low contact resistance: The specified resistance of no more than 5 mΩ supports electrical continuity at the terminal interface.
- Test-probe access: Helps technicians perform electrical checks during commissioning and troubleshooting.
- Terminal labeling support: Makes it easier to identify field connections and maintain consistent wiring records.
- Broad module application: Supports compatible discrete and analog I/O, distribution, transmitter, and counter modules within the TM5 system.
Working Principle
The TM5ACTB12 establishes the electrical path between field wiring and the corresponding TM5 electronic module. Its spring-clamp terminals retain correctly prepared conductors, while the terminal block’s interface connects those conductors to the designated module contacts.
A typical arrangement is:
Field Devices → TM5ACTB12 Terminal Block → Compatible TM5 Electronic Module → TM5 Bus Base → PLC Controller
For a digital input module, field wiring may carry the switching signal from a sensor or limit switch. For an analog input module, the wiring may carry a measurement signal from a compatible transmitter. The terminal block provides the connection in each case, while the electronic module determines how the electrical signal is acquired or processed.
The 12-contact arrangement accommodates the terminal assignment required by supported modules. It does not mean that every compatible module has 12 independent input or output channels. Some contacts may be assigned to common connections, power distribution, or other module-specific functions.
The spring-clamp mechanism maintains contact pressure on the prepared conductor. During wiring changes, the release button allows the conductor to be removed without dismantling the entire TM5 assembly. This can simplify maintenance when a field device or cable needs to be replaced.
The terminal block must match the associated electronic module and bus base. The TM5 system uses color coding and defined component associations, so selecting a block based only on the number of contacts is insufficient. A white TM5ACTB12 must not be substituted for a gray TM5ACTB12PS where the module requires the gray version.
Role in the Modicon TM5 I/O Architecture
The TM5ACTB12 occupies the field-connection layer of a modular I/O slice. It connects external conductors to the electronic module, while the bus base provides the electrical interface to the wider TM5 system.
Field Wiring → TM5ACTB12 → Electronic I/O Module → TM5 Bus Base → Controller
| System Component | Function |
|---|---|
| Schneider TM5ACTB12 | Provides 12 field-wiring connection points |
| TM5 Electronic I/O Module | Acquires input signals or controls outputs |
| TM5 Bus Base | Provides module mounting and the system bus interface |
| Modicon M258 Controller | Executes the PLC application in supported configurations |
| Modicon LMC058 Controller | Controls compatible machine applications using TM5 hardware |
| Field Sensors | Supply discrete states or analog measurements |
| Actuators and Control Devices | Receive commands from compatible output modules |
| Common Distribution Module | Distributes designated electrical potentials through supported connections |
| Terminal Labels | Identify wiring assignments during installation and maintenance |
| Electrical Cabinet | Houses the PLC, I/O slices, and associated field wiring |
A complete TM5 slice requires a compatible bus base, electronic module, and terminal block. The component association must match the module’s electrical function, terminal count, and color coding.
Industrial Applications
| Application | Typical Use |
|---|---|
| Machine Automation | Connecting field wiring to compatible TM5 I/O modules |
| Packaging Machinery | Organizing sensor and actuator connections in modular control panels |
| Material Handling | Terminating field signals from conveyor sensors and machine devices |
| Assembly Equipment | Connecting discrete signals and analog instrumentation |
| Process Skids | Wiring transmitters and control devices to supported I/O modules |
| Conveyor Systems | Organizing connections for detection, position, and control signals |
| Manufacturing Control Cabinets | Building modular I/O slices with clearly identified terminals |
| Remote I/O Stations | Providing field connections in compatible TM5 expansion arrangements |
| Industrial Instrumentation | Connecting supported voltage or current measurement circuits |
| PLC Maintenance | Replacing a damaged terminal block without changing the module’s electronic function |
Installation and Maintenance
- Verify the part number: Confirm that the required terminal block is TM5ACTB12 and distinguish it from the six-contact TM5ACTB06 and gray TM5ACTB12PS.
- Check module compatibility: Match the terminal block to the selected electronic module and bus base using the TM5 system’s component association.
- Identify the terminal assignments: Review the wiring diagram and label each field conductor before making connections.
- Isolate the electrical circuit: Follow the required shutdown and isolation procedure before installing the block or changing field wiring.
- Prepare the conductors: Use conductor sizes within the permitted range and prepare the ends according to the applicable wiring instructions.
- Inspect the terminal mechanism: Check the spring clamps, release buttons, and contact areas for contamination or visible damage.
- Connect the field wiring: Insert each prepared conductor into its assigned terminal and verify that it is securely retained.
- Check conductor preparation: Use suitable ferrules where required and ensure that the conductor preparation matches the terminal’s permitted connection method.
- Verify color and orientation: Confirm that the white terminal block matches the associated white TM5 slice and is fitted in the intended position.
- Test the connections: Perform the appropriate continuity and electrical checks before restoring the system to normal operation.
- Inspect the completed assembly: Confirm that the terminal block is correctly seated, conductors are secure, and no wiring interferes with adjacent modules.
- Update maintenance records: Record replacement details and revise wiring documentation if any terminal assignment or field connection has changed.
Compatible System Components
| Component | Function |
|---|---|
| Schneider TM5ACBM11 Bus Base | Provides the bus-base interface for compatible TM5 modules |
| Schneider TM5ACBM15 Bus Base | Provides a compatible bus-base arrangement with address-setting capability |
| Schneider TM5SDI6D Digital Input Module | Acquires compatible 24 V DC discrete input signals |
| Schneider TM5SDI12D Digital Input Module | Provides additional discrete input channels in supported configurations |
| Schneider TM5SAI4L Analog Input Module | Acquires compatible voltage and current measurement signals |
| Schneider TM5SAO4L Analog Output Module | Provides analog output signals for compatible field devices |
| Schneider TM5SDO12T Digital Output Module | Controls compatible 24 V DC discrete output loads |
| Schneider TM5ACTB12PS Terminal Block | Gray 12-contact alternative for supported power distribution and receiver modules |
| Modicon M258 Controller | Supports compatible TM5 system configurations |
| Modicon LMC058 Controller | Supports compatible TM5 expansion arrangements |
Recommended Related Models
| Model | Product Type | Main Difference |
|---|---|---|
| Schneider TM5ACTB06 | 6-Pin Terminal Block | White terminal block for compatible 24 V DC I/O modules and TM5SBET1 |
| Schneider TM5ACTB12 | 12-Pin Terminal Block | White terminal block for compatible discrete and analog I/O, distribution, transmitter, and counter modules |
| Schneider TM5ACTB12PS | 12-Pin Terminal Block | Gray terminal block for supported power distribution and receiver modules |
| Schneider TM5ACTB16 | 16-Pin Terminal Block | Provides 16 connection points for compatible TM5 modules |
| Schneider TM5ACTB32 | Terminal Block | Terminal block for supported AC and relay I/O configurations |
Key Advantages
- Provides 12 connection points for compatible Modicon TM5 modules.
- Uses spring-clamp push-in terminals with push-button wire release.
- Supports conductor identification and test-probe access.
- Accommodates a range of solid and fine-stranded conductor sizes.
- Integrates into compatible white TM5 modular I/O slices.
Technical FAQs
Which module types are compatible with the TM5ACTB12?
The TM5ACTB12 is intended for compatible 24 V DC discrete I/O modules, analog I/O modules, common distribution modules, remote transmitter modules, and counter modules. The specific terminal-block association should be checked for the selected electronic module before assembly.
How does the TM5ACTB12 differ from the TM5ACTB12PS?
Both terminal blocks have 12 contacts, but the TM5ACTB12 is white and supports the designated discrete and analog I/O and related module types. The TM5ACTB12PS is gray and intended for compatible power distribution and receiver modules. Their different color and functional associations mean they should not be treated as interchangeable.
What is the advantage of using spring-clamp push-in terminals?
The spring-clamp arrangement allows conductors to be connected without conventional screw-terminal tightening. The push-button release also simplifies disconnection during maintenance, while the spring mechanism maintains contact pressure on correctly prepared conductors.
Does the 12-contact terminal block provide 12 independent I/O channels?
No. The number of contacts refers to the available terminal connection points, not the number of independent I/O channels. The actual signal assignments depend on the associated electronic module and may include common connections or other module-specific functions.