SIEMENS TXM1.8U

TXM1.8U SIEMENS Basis unit

Product  Description：

The Siemens TXM1.8U is an 8-point universal input/output module part of the TX-I/O product range, specifically designed for use within the Desigo building automation and control system. Its defining feature is its high level of versatility, as each of the eight points can be individually software-configured to perform different functions, allowing for high density and efficiency in control cabinet layouts.

Product Specifications

• Module Type: Universal Analog/Digital Input/Output Module.

• Number of I/O Points: 8 universal points, individually configurable.

• Operating Voltage: $DC\ 22.5\ to\ 26\ V$ (SELV / PELV).

• Power Consumption: Maximum $1.5\ W$.

• Signal Range (Analog): $DC\ 0\ to\ 10\ V$ for both inputs and outputs.

• Digital Input (DI): Supports status signals (N/O or N/C), message impulses, or counter impulses up to $25\ Hz$.

• Analog Input (AI): Supports temperature sensors (e.g., Pt1000, Ni1000) or $0\ to\ 10\ V$ DC signals.

• Analog Output (AO): Supports $0\ to\ 10\ V$ DC signals.

• Indicators: Each I/O point has a green LED for status and diagnostic indication.

• Weight: Approximately $0.179\ kg$.

• Dimensions: $64\ \times\ 77.5\ \times\ 98\ mm$.

• Mounting: Standard DIN rail mounting via the TX-I/O terminal base.

Product Advantages

• Maximum Versatility: The "Universal" designation means a single module can handle a mix of temperature sensors, digital switches, and $0-10V$ actuators, reducing the number of different module types needed on a project.

• Hot-Swappable Design: The electronic plug-in unit can be replaced in seconds without disconnecting field wiring or interrupting the communication of other modules on the bus.

• Self-Establishing Bus: The TX-I/O island bus transmits both power and communication signals automatically when modules are snapped together, simplifying installation.

• High Diagnostics: Built-in LEDs provide real-time status for every point, aiding in fast troubleshooting during commissioning and maintenance.

• Space Efficiency: Its compact DIN format allows for a high number of I/O points in a relatively small footprint within electrical panels.

Important Considerations (Precautions)

• Safety Standards: The module must be powered by a Safety Extra-Low Voltage (SELV) or Protective Extra-Low Voltage (PELV) source according to HD 384 standards.

• Wiring Protection: While the module is protected against short circuits and incorrect wiring with $AC/DC\ 24\ V$, the bus connector on the side has no protection and should be handled with care.

• Shielding Requirements: Counter inputs faster than $1\ Hz$ that are routed for more than $10\ meters$ in the same trunking as analog inputs must be shielded to prevent interference.

• Field Supply: Ensure that the total current for all terminals does not exceed the module's admissible limit (typically $4\ A$ total for the supply terminals).

• Terminal Base Requirement: The module requires a separate terminal base for installation; ensure the base is correctly addressed using the address key before operation.

Product Applications

The TXM1.8U is primarily used in building management systems (BMS) to interface with various field devices.

• HVAC Control: Connecting temperature sensors (Pt1000/Ni1000) and controlling valve or damper actuators via $0-10V$ signals.

• Lighting and Shading: Monitoring digital switches for light control or controlling electronic ballasts.

• Energy Monitoring: Using the counter impulse function to collect data from flow meters or electricity meters.

• Process Monitoring: Interfacing with pressure, humidity, or CO2 sensors that output standard $0-10V$ analog signals.

• Status Tracking: Monitoring the run/trip status of motors, fans, or pumps via digital dry contacts.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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