Accuenergy Launches AcuIOM I/O Module to Bridge HVAC Equipment Into Building Automation Systems

Accuenergy officially launched the AcuIOM Universal I/O Module on July 7, 2026, a signal-acquisition device the Toronto-based manufacturer says is built to connect HVAC equipment, lighting and other field devices into building management systems, SCADA platforms and programmable logic controllers through a single unit. The AcuIOM is available in four models and supports both Modbus RTU and Modbus TCP communication.

Accuenergy, which manufactures power and energy measurement equipment used across commercial and industrial facilities in the U.S. and Canada, said the AcuIOM was designed to help system integrators and facility operators consolidate the growing mix of sensors and control signals found on modern job sites without replacing existing controllers. The company is headquartered in Toronto and holds ISO 9001, ISO 14001, ISO 45001, ISO 27001 and ISO 50001 certifications.

AcuIOM Models Split Between Analog and Digital I/O

The AcuIOM line includes two analog-focused models and two digital and relay-focused models. The AcuIOM-1 and AcuIOM-2 offer 8 and 16 analog inputs, respectively, alongside analog outputs, which Accuenergy said suits continuous sensor monitoring of parameters such as temperature, pressure and flow common on HVAC and mechanical equipment. The AcuIOM-3 and AcuIOM-4 are built for digital and relay control, with the AcuIOM-4 offering up to 28 digital inputs, four digital outputs and two relay outputs for status monitoring and direct switching of field equipment such as pumps, fans and dampers.

Both analog and digital models support 0-20mA and 0-10V signal ranges, with analog input accuracy rated at 0.2% and analog output at 0.5%. Digital inputs accept voltages up to 160Vac/dc with 2500Vac isolation, and relay outputs are rated for up to 250Vac and 5A resistive loads. Every AcuIOM model includes an RS485 port for Modbus RTU and a 10/100 Mbps Ethernet port for Modbus TCP, plus a USB port for local configuration. The module runs on 12-36Vdc with a maximum burden of 6W.

AcuIOM Targets Building Automation and HVAC Integration

Accuenergy specifically cited building automation as a target application for the AcuIOM, saying the module can interface with HVAC, lighting and control equipment to monitor statuses and adjust setpoints across a facility. The company said the device is intended to extend the functionality of existing energy and power meters by integrating external sensors and control signals, including pulse outputs from electrical, water and gas meters, and by enabling automated load shedding based on real-time conditions.

"Industrial systems are becoming increasingly connected, yet many facilities still face challenges integrating field devices and control systems across multiple platforms," said Ryan Manbahal, product manager at Accuenergy, in the company's launch announcement. "The AcuIOM was developed to provide a flexible and scalable I/O platform that simplifies signal acquisition, monitoring, and control while reducing deployment complexity for system integrators and facility operators."

AcuIOM Offers Standalone Retrofit Option for HVAC Controls

Accuenergy said the AcuIOM can also operate as an independent, standalone remote I/O module for organizations managing system upgrades, adding monitoring and control capability to existing infrastructure without replacing primary controllers. That positioning is aimed at HVAC contractors and building automation integrators retrofitting older mechanical systems that lack modern connectivity, rather than requiring a full controls replacement to add remote monitoring and setpoint adjustment.

The company said the AcuIOM also applies to data centers and other critical facilities, where distributed I/O architectures and continuous environmental monitoring support uptime requirements, as well as to industrial process control applications where the module can directly drive pumps, fans and valves through its digital and relay outputs while communicating upstream over Modbus to PLC and SCADA systems.

Accuenergy's existing product catalog already includes a line of building automation sensors, including duct-mounted temperature, humidity, differential pressure and carbon dioxide sensors, that the company said are commonly paired with I/O modules like the AcuIOM on HVAC and mechanical retrofit jobs. The company positioned the AcuIOM as a connecting point that lets integrators bring those signals, along with third-party field devices, onto a shared Modbus architecture rather than wiring each sensor directly into a building controller.

AcuIOM Arrives as Facilities Push Toward Connected Automation

Accuenergy framed the AcuIOM launch against a broader shift it described as Industry 4.0, in which organizations are seeking to better integrate a diverse range of field devices, sensors and control systems across a single architecture. The company said flexible I/O modules are part of the critical technology leading that transition, enabling engineers to bridge equipment to modern infrastructure without major system overhauls.

The AcuIOM's combination of Modbus RTU and Modbus TCP support, Accuenergy said, is meant to let the module serve as an important connecting block for expanding data acquisition and control capabilities at the network edge, rather than requiring a dedicated gateway for each communication protocol already running on a site's building management system.

Accuenergy describes itself as a designer and manufacturer of power and energy measurement solutions for industrial, commercial and residential applications, with a portfolio that spans energy and power meters, current transformers, power analyzers, pre-wired control panels and communication devices supporting system monitoring, protection and performance analysis. The company is based in Toronto and markets its products to system integrators and facility operators across North America.

Accuenergy said the AcuIOM launch continues its expansion of industrial measurement and control solutions for system integrators and facility operators. The module is available now through Accuenergy's standard distribution channels, with full technical specifications for all four models published on the company's website.