TXM1.8D SIEMENS 8 Digital Input Module

Description

TXM1.8D SIEMENS 8 Digital Input Module

Product Dimensions：

Product Description (Detailed Explanation)

The TXM1.8D provides 8 independent digital inputs for signaling and status monitoring. It is a “passive” bus module that clips onto a standard terminal base (such as the TXS1.P-T10). Each input is designed to monitor potential-free (dry) contacts.

The module converts physical binary signals (e.g., switch open/closed) into digital data for the automation station. It features integrated LED indicators on the front panel to provide immediate visual feedback of the logical status of each input, making it an essential tool for maintenance and commissioning.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• Plug-and-Play Integration: Features a hot-swappable design; the electronics module can be replaced without disconnecting field wiring from the terminal base.

• Compact Efficiency: Provides 8 inputs in a slim housing, maximizing space within the control cabinet.

• Dual Functionality: Supports both standard status signaling and low-frequency pulse counting (e.g., for simple flow or energy meters).

• Clear Diagnostics: Local LED indicators allow technicians to verify field device status at a glance without using a software tool.

• Rugged Communication: Communicates via the robust TX-I/O bus, ensuring reliable data transfer to the primary controller.

Precautions (Important Notes)

• Terminal Base Required: The module must be mounted on a TX-I/O terminal base (e.g., TXS1.P-T10). It cannot function as a standalone unit.

• Potential-Free Contacts Only: Never apply external voltage to the inputs. The module provides its own sensing voltage; connecting external AC or DC power will damage the circuitry.

• Max Wire Length: To prevent electromagnetic interference and voltage drops, ensure field wiring stays within the specified distance (typically max. 300m for twisted pair).

• Isolation: The inputs are not galvanically isolated from the I/O bus. Ensure proper grounding of the control system to prevent noise loops.

Product Applications (Typical Use Cases)

• Equipment Status Monitoring: Tracking the Run/Stop status of pumps, fans, and motors in HVAC systems.

• Safety & Security Alarms: Monitoring smoke detectors, fire dampers, or intrusion sensors.

• Filter Monitoring: Detecting dirty filter conditions via differential pressure switches.

• Maintenance Alerts: Receiving “Hand-Off-Auto” (HOA) switch positions from local motor starter panels.

• Consumption Tracking: Reading pulses from water or gas meters that provide a dry-contact pulse output.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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