Gateways & Modems

Gateways & Modems

Gateways and modems provide the communications “on-ramp” between field devices and higher-level monitoring, configuration, and analytics systems. They are used to connect instruments to networks, translate or tunnel protocols, and enable remote device access without requiring direct local connection at each measuring point. This category is central to scalable architectures where many devices must be reachable from a small number of engineered access points.

In practice, offerings range from simple point tools to full IIoT edge connectivity. Examples include USB/HART modems (e.g., Commubox FXA195) that link a computer to HART devices for configuration, and interface modules (e.g., Commubox FXA291) that support Endress+Hauser CDI connectivity alongside USB/Bluetooth options. At the network level, devices such as Fieldgate FXA42 focus on IIoT connectivity and remote device management, while FieldPort and FieldEdge products extend field integration and edge computing approaches.

Gateways also support Ethernet-based device access and segmentation in modern architectures. Solutions such as Fieldgate SFG500 are positioned as wireless access points and gateways for local and IIoT access to Ethernet-compatible devices (including integration scenarios involving Rockwell Automation environments). Modular switching elements such as the SFM500 EtherNet/IP Field Switch address physical network expansion and topology needs in control cabinets and skids.

The primary benefits are faster access to device data, reduced need for manual on-site interaction, and improved consistency of diagnostic and configuration workflows. Centralized access points allow multiple devices to be reached through one engineered entry, supporting both operational monitoring and lifecycle management. Protocol bridging and structured network attachment also simplify integration of legacy loops into contemporary SCADA, PLC/DCS, and IIoT ecosystems.

Typical applications include remote commissioning support, periodic health checks, laptop-to-HART connectivity for parameterization, edge aggregation of device diagnostics, and selective publication of device data to cloud or on-prem analytics platforms. Key design considerations include network security boundaries, address management, determinism/latency needs (especially on control networks), hazardous-area constraints where applicable, and maintainable physical installation (powering, environmental ratings, and service access).

Engineered Equipment Company, a leading supplier of specialized industrial equipment.