Advantech ADAM-4118 | 8-Channel Thermocouple Input Module

Advantech ADAM-4118 | 8-Channel Thermocouple Input Module

The ADAM-4118 is a specialized RS-485 I/O node designed for engineers and integrators who require consistent data from thermocouples and low-level analog signals in areas subject to high interference. This module provides eight differential input channels, each of which can be configured independently to handle a variety of sensor types, including standard thermocouples (J, K, T, E, R, S, B, and N) as well as millivolt and milliamp signals. Its dual-protocol support for Modbus RTU and ASCII ensures that it can serve as a primary monitoring point for modern PLC architectures or legacy serial control systems alike.

Reliability is a cornerstone of the ADAM-4118 design, featuring a wide operating temperature range from -40 to 85°C that allows for placement directly at the point of measurement in non-climate-controlled cabinets. The hardware is fortified with 3,000 VDC isolation, 200 VDC high common mode protection, and integrated TVS/ESD safeguards to prevent damage from electrical surges or grounding issues common in industrial plants. Whether monitoring steady-state furnace temperatures or rapid process trends, the ADAM-4118 delivers the resolution and ruggedness needed for critical thermal management applications.

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SKU ADAM-4118-B Category

Distinctive Features For The ADAM 4118

  1. Independent Eight-Channel Differential Input Architecture

    • Each of the 8 channels can be assigned a unique range or sensor type.

    • Differential inputs provide superior rejection of common-mode noise.

    • Allows for a mix of different thermocouple types within a single hardware module.

  2. Extensive Thermocouple And Analog Signal Support

    • Natively interfaces with J, K, T, E, R, S, B, and N-type thermocouple sensors.

    • Supports low-level voltage ranges from ±15 mV up to ±2.5 V.

    • Handles standard current loops including 4 to 20 mA and ±20 mA for process transmitters.

  3. High-Speed Selectable Sampling For Dynamic Acquisition

    • Users can toggle between 10 samples per second or 100 samples per second.

    • Faster sampling supports trending of rapid thermal events or dynamic signal changes.

    • 16-bit resolution ensures high-fidelity data capture across all ranges.

  4. Enhanced Electrical Resilience And System Protection

    • Features 3,000 VDC isolation to safeguard the communication backplane.

    • Built-in overvoltage protection withstands inputs up to ±60 VDC.

    • High common mode voltage protection rated at 200 VDC prevents signal distortion.

  5. Industrial-Grade Environmental Resilience For Remote Mounting

    • Operating temperature range of -40 to 85°C enables deployment in extreme climates.

    • Housed in a durable enclosure with secure plug-in screw terminal blocks.

    • Supports unregulated power inputs from 10 to 48 VDC for global compatibility.

  6. Flexible Communication Architecture For Industrial Networking

    • Fully compatible with Modbus RTU for easy integration with SCADA systems.

    • Includes a 1.6-second watchdog timer to monitor communication and system health.

    • RS-485 connectivity supports long-distance runs up to 1,200 meters.

Performance Data Table For The ADAM-4118

Measurement ParameterSpecification Detail
Module ModelADAM-4118
Interface ProtocolModbus RTU and ASCII Command
Input Channel Density8 Differential Channels
Resolution Capability16-bit
Sampling Rate Frequency10 or 100 samples/sec (Selectable)
Thermocouple CompatibilityJ, K, T, E, R, S, B, N
Voltage Input Scales±15mV, ±50mV, ±100mV, ±500mV, ±1V, ±2.5V
Current Loop Ranges0~20mA, 4~20mA, ±20mA
Input Impedance Rating20 MΩ
Accuracy Deviation±0.1% (Voltage) / ±0.2% (Current)
Isolation Barrier3,000 VDC
High Common Mode Limit200 VDC
Temperature Range-40 to 85°C (-40 to 185°F)
Power Consumption0.5 W at 24 VDC

Recommended Deployment Paths For ADAM-4118 Modules

The ADAM-4118 is a premier choice for industrial monitoring where multi-channel temperature data must be gathered under extreme thermal or electrical stress. Its wide-ranging sensor support and Modbus connectivity make it a highly versatile component in distributed I/O systems.

  • High-temperature monitoring in industrial kilns, ovens, and smelting furnaces.

  • Process control interface for chemical reactors and specialized distillation units.

  • Remote temperature sensing for pipeline monitoring and pumping stations.

  • Distributed I/O nodes for power generation facilities and substation monitoring.

  • Environmental chamber validation and large-scale testing laboratory setups.

  • Integrated thermal monitoring for heavy-duty machinery and engine test stands.

  • Food and beverage pasteurization monitoring for compliance and quality control.

  • Retrofitting existing industrial panels with robust Modbus-based temperature sensing.

ADAM 4118 Datasheet

Additional information

Weight2 lbs

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