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      Siemens TXM1.8D
      · Product image is representative; revision or series may vary. Contact us to request a specific version.
      Ships by Saturday, November 14

      TXM1.8D

      Eight-channel digital input module

      Require for Quote:

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          PRODUCT DESCRIPTION

          TXM1.8D Eight-channel digital input module

          Siemens TXM1.8D is an eight-channel digital input module in the TX-I/O range for building automation. Each input can be configured for status contacts, stored contact pulses or counting, with a three-color indicator providing local point information.

          The assembly uses a separate terminal base and plug-in electronics, allowing the I/O module to be exchanged without rewiring the field circuits. Volt-free mechanical contacts and suitable SELV/PELV electronic switches are supported. Counting is available up to 10 Hz, with a 32-bit count register and a specified field cable length of up to 300 m.
          BEFORE YOU BUY

          Confirm the complete TXM1.8D identity

          Send a label photo for review >>
          ACTUAL APPLICATIONS

          Application fields for TXM1.8D

          These broad application fields reflect the documented function and technical characteristics of TXM1.8D.
          • 01 · BUILDINGS

            Commercial and Public Buildings

            Commercial office buildings and commercial property environmentsPublic educational buildings and public institutional buildings
          • 02 · WATER & WASTEWATER

            Municipal Water Supply and Water Reuse

            Urban water supply and metropolitan water supplyMunicipal water reuse and industrial water reuse
          • 03 · POWER GENERATION

            Hydroelectric Generation and Geothermal Energy

            Reservoir hydroelectric generation and renewable hydroelectric generationGeothermal electricity generation and geothermal cogeneration

          Technical specifications for TXM1.8D

          • Product Model
            TXM1.8D
          • Product Parameters
            Eight-channel digital input module
          • In stock
            3 units
          • Manufacturer
            Siemens
          • Digital input channels
            8
          • Bus supply
            21.5 to 26 V DC
          • Maximum power consumption
            1.1 W
          • Contact-sensing voltage
            21.5 to 25 V DC
          • Contact-sensing current
            1.6 mA
          • Initial sensing current
            10 mA
          • Closed-contact resistance
            200 Ω maximum
          • Open-contact insulation
            50 kΩ minimum
          • Maximum cable length
            300 m
          • Counter frequency
            10 Hz maximum
          • Counter register
            32 bit
          • Terminal tightening torque
            0.6 Nm maximum
          • Operating temperature
            -5 to +50 °C
          • Front protection
            IP30
          • Terminal-base protection
            IP20
          View all additional
          Ask for Quote

          Alternative Names

          TXM1.8D TX-I/O Eight-channel digital input module
          SYSTEM & REPLACEMENT CHECK

          Information needed before ordering

          Three direct checks to secure your system integration and minimize ordering risks.

          Information

          System integration Replacement check Manuals & support
          SYSTEM INTEGRATION

          Integrate TXM1.8D within TX-I/O

          Assign the eight points in the TX-I/O configuration as maintained contacts, pulse contacts or counters. Match the selected point behavior with the connected device; a pulse-memory setting and a continuously maintained status do not produce the same controller response.
          Use volt-free mechanical contacts or electronic switches meeting SELV/PELV requirements. The contact-sensing current is 1.6 mA with a 10 mA initial current, and the field inputs are not electrically separated from the module electronics.
          Supply the side bus within 21.5 to 26 V DC and allow 1.1 W for the module. Install with adequate ventilation for -5 to +50 °C operation and maintain the correct terminal-base engagement and field-cable arrangement.

          Features:

          • Digital input channels: 8
          • Bus supply: 21.5 to 26 V DC
          • TX-I/O
          Use TXM1.8D only within the documented TX-I/O arrangement and applicable installation instructions.
          INTERCHANGEABILITY

          Replace TXM1.8D within TX-I/O

          Record the point configuration and labels before releasing the plug-in module. Observe the terminal-isolation function and note that the common terminals are interconnected in the removable electronics, rather than permanently in the terminal base.
          Replace the eight-input TXM1.8D with the correct module and restore its configured contact and counter functions. The sixteen-input variant has a different point count and indicator arrangement and must not be substituted as an identical unit.
          After refitting, prove maintained contacts, pulse capture and any counter inputs separately. Check that the three-color LEDs correspond to the configured point state and that pulses within the permitted 10 Hz range are registered correctly.

          Features:

          • Terminal-base protection: IP20
          • Mating terminals and installed configuration
          • Post-exchange functional validation
          Use TXM1.8D only within the documented TX-I/O arrangement and applicable installation instructions.
          DOCUMENTATION STATUS

          Browse the Manuals, Datasheets, Official Documents, Links

          Important Notice: The linked files are Amikong-hosted reference documents. Match their product identity and scope to the supplied assembly, and consult the applicable manufacturer instructions before use. Accessories and additional documents are included only when expressly listed in the quotation.

          Features:

          • Exact-model technical data for TXM1.8D
          • Document applicability checked against the complete identity
          • Directory links by subcategory and brand
          Documentation for TXM1.8D must match the installed product identity and supplied configuration.

          Also searched as

          QBM81-3 GLB341.1E GEB161.1E PPM-1U32.BPF PPM-1U32.PPF

          Important notice

          Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
          This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
          BUYER INFORMATION

          Commercial terms without hidden steps

          Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
          • 01

            Shipping & delivery

            Dispatch
            Eligible stock: same / next day
            Carriers
            DHL, FedEx or UPS
            Ship from
            Xiamen, China
            Product size
            6.40 x 9.00 x 7.00 cm
            Net weight
            0.16 kg
          • 02

            Payment & customs

            Payment
            Bank transfer (T/T)
            Currencies
            USD · EUR · GBP · RMB
            Credit cards
            Not accepted
            HS reference
            8538900000
            Origin
            Germany
          • 03

            Warranty & returns

            Warranty
            12 months from AMIKON
            Inspection
            Label, condition and packing checks
            Returns
            Prior RMA authorisation required
            Compatibility
            Confirm before order
            OEM warranty
            Does not apply
          Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.

          • Part checked

            Full suffix recorded

          • Condition checked

            Label and appearance

          • Packing checked

            Antistatic protection

          • Tracking supplied

            Established couriers

          • Sandy Lin

            Dedicated account manager · 15+ years
          FREQUENTLY ASKED QUESTIONS

          Questions buyers ask about TXM1.8D

          Direct answers about identity, compatibility, stock, warranty, payment and shipping.

          • Can TXM1.8D count pulses on its inputs?

            Yes. TXM1.8D supports counter inputs up to 10 Hz, with a 32-bit counter register.

          • Must contacts connected to TXM1.8D be voltage-free?

            Mechanical contacts for TXM1.8D must be volt-free; electronic switches must meet the specified SELV/PELV conditions.

          • What does the TXM1.8D contact-sensing circuit provide?

            TXM1.8D uses 21.5 to 25 V DC contact sensing at 1.6 mA, with a 10 mA initial current.

          • Are TXM1.8D inputs galvanically isolated from its electronics?

            No. The TXM1.8D input circuits are not electrically separated from the module electronics.

          • Where are the TXM1.8D common terminals interconnected?

            The common connections are made within the TXM1.8D plug-in I/O module. Removing that module removes the interconnection.

          • What is the TXM1.8D terminal torque limit?

            The maximum specified tightening torque for TXM1.8D rising-cage terminals is 0.6 Nm.

          • Should an TXM1.8D order include a terminal base?

            State explicitly whether TXM1.8D is required as plug-in electronics alone or together with its terminal base and associated installation items.

          • How can a distributor distinguish TXM1.8D from TXM1.16D?

            TXM1.8D has eight inputs with three-color LEDs. TXM1.16D has sixteen inputs and a different LED arrangement.
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