When I started working on control systems, input/output (I/O) was typically centralized in a few control cabinets. That might have sufficed in the analog days (yes, I’m showing my age), but modern control systems must manage more endpoints across increasingly diverse environments. As a result, many designers are turning to machine-mount remote I/O.
How machine-mount remote I/O works
As the name suggests, this approach relocates I/O modules from the control cabinet and mounts them on or near the sensors and actuators they connect to. These distributed I/O modules offer several compelling benefits:
Reduced wiring costs: Machine-mount I/O reduces the need for long, complex cable runs, cutting both material and labor costs.
Space savings: Smaller control cabinets make it easier to squeeze more I/O into space-restricted environments.
Support for Industry 4.0: These modules enable real-time data collection and diagnostics for what were once simple sensors and actuators.
Because machine-mount remote I/O lacks the protection of a cabinet, it must be ruggedized to withstand harsh environments. The new ADAM-200PN series from Advantech demonstrates how this is achieved:
Ruggedized design: The modules carry an IP67 rating for resistance to dust and water ingress. They operate across a temperature range of -40 to 60°C and are designed for demanding transportation and industrial environments, with EN 50155 compliance and vibration/shock testing for high-vibration applications.
M12 connectors: The modules support screw-lock and push-pull fast-lock M12 connectors for fast, secure installation. D, A, and L-coded connectors ensure the appropriate cables are used for networking, I/O, and power, respectively.
Multiple mounting options: Front, sidewall, and direct machine mounting are supported for cabinet-free installation.
The ADAM-250PN-A (Figure 1) is the first member of the ADAM-200PN series. It features 16 configurable digital I/O channels, with support for IEC 61131-2 Type 3 sink digital inputs and fast-response source digital outputs for reliable industrial signaling. For network connectivity, the module natively supports both PROFINET and Modbus/TCP, ensuring compatibility with a wide range of industrial Ethernet controllers.