Industrial systems don't always fail gracefully, especially when you can't tell if critical equipment like pumps, motors, or switches are actually running. Acromag's new NT2140 discrete AC input module provides the capability of remote power sensing over Ethernet. It gives engineers a straightforward way to monitor the on/off status of AC-powered devices across a plant or field site, without having to guess or rely on outdated wiring.
Whether you're watching a pump station on the far end of a facility or tracking input from a safety switch, the NT2140 is designed to add a layer of visibility modern operations demand.
The NT2140 enables remote monitoring of AC power status across industrial systems via Ethernet and IIoT protocols. Image used courtesy of Acromag
The NT2140: Ethernet Discrete AC Input Modules
Acromag has added the NT2140 discrete AC input modules to its BusWorks NT series, offering six individually isolated AC optocoupler inputs to monitor 120 V or 240 V AC on/off statuses. Designed for integration into Ethernet-based control systems, the NT2140 communicates over Modbus TCP/IP, EtherNet/IP, and PROFINET. It also includes IIoT-ready protocols like OPC UA and MQTT. With this expansion, engineers gain a flexible way to monitor electrical state changes across a wide range of equipment, including pumps, motors, limit switches, and relays.
AC Status Monitoring Over Ethernet
The NT2140 is purpose-built to monitor field equipment's on/off status through direct AC voltage sensing. Each of its six channels can detect whether 120 V or 240 V AC is present, making it suitable for tracking powered states in motors, pumps, push buttons, and other switchgear. It also includes two bidirectional DC logic I/O channels for monitoring or controlling devices operating between TTL and 0-32 V logic levels.
Modules can be configured via any standard web browser, and dual RJ45 ports support daisy-chaining multiple devices for streamlined network integration. Each channel is optically isolated, which enhances electrical safety and noise immunity in high-interference environments.
Scalable Architecture With NTX Expansion
The NT2140 is just one component in a modular system. Up to three NTX expansion modules can be added to a single NTE Ethernet module using an internal DIN rail bus. This allows up to 24 AC input channels, or a combination of analog, temperature, and discrete I/O types, to be managed under a single IP address. This flexibility is especially valuable in distributed control applications, from wastewater plants to oil and gas skids.
Acromag’s i2o technology enables direct, long-distance signal transmission between I/O modules without the need for a PLC or master controller. Image used courtesy of Acromag
Acromag’s i2o (input-to-output) peer-to-peer messaging protocol lets devices share data directly with each other without going through a PLC or master controller, simplifying designs and improving response times. Rule-based logic functions using IF/THEN/ELSE conditions can be configured directly on the module for localized control actions.
Ready for IIoT and Harsh Environments
For applications that involve the IIoT, the NT2140 supports RESTful APIs, MQTT client functionality, and OPC UA server communication. The module is built for harsh conditions and features a slim 25 mm DIN-rail-mount housing, -40 °C to 70 °C operating range, 1500 V channel-to-network isolation, and CE compliance. Additionally, visual troubleshooting is simplified with LED status indicators per channel.
When managing remote industrial equipment, you need a clear, dependable way to tell what's on and what's not. Acromag's new NT2140 discrete input module is designed to make that easy, offering real-time visibility into motors, pumps, and other systems through Ethernet.
