ANALOG I/O
Capture high density voltage or current analog inputs from multiple sensors, while analog outputs deliver control signals and setpoint values to connected devices. Ideal for temperature, pressure, level and process feedback signals.
Universal I/O Module
The AcuIOM is a universal I/O module with flexible analog, digital and relay port configuration on select models. It can operate independently as a standalone I/O module or be paired with energy meters to expand system level data acquisition and control capabilities. Available in four models, each with built-in dual Ethernet and RS485 terminals.
- Supports up to 16 analog inputs, 4 analog outputs, 28 digital inputs, 4 digital outputs, and 2 relay outputs depending on the model
- Four different models, each combining various analog, digital, and relay I/O capabilities
- RS485 port for Modbus RTU communication
- Dual Ethernet ports supporting Modbus TCP/IP communication
- Operates independently as a universal I/O module
- Sequence of Events (SOE) logging with 200 FIFO entries
- Analog input accuracy of 0.2% and analog output accuracy of 0.5% under low voltage DC power conditions
| NAME | CATEGORY | |
|---|---|---|
| Product Datasheet | Download PDF | |
| User Manual | Download PDF | |
| Quick Setup Guide | Download PDF |
AcuIOM Overview
Designed as a flexible and scalable I/O solution for industrial monitoring, control and automation applications, the AcuIOM interfaces between field devices such as sensors and actuators. Native Modbus RTU and Modbus TCP support for seamless integration with SCADA, PLCs, and building management systems.
Powerful UI Software for Device Configuration and Montioring
The AcuIOM can be configured using the free Acuview 2 software to control device settings and monitoring digtal/analog input & output data. Access external sensors and control signaling information for temperature, pressure levels, flow, alarm statuses, electrical, water, and gas consumptiion from multiple devices.
AcuIOM Main Features
DIGITAL I/O & RELAY
Digital inputs support pulse acquisition and device status monitoring. Digital outputs provide reliable control signaling, and relay outputs enable direct switching of external devices.
ETHERNET & RS485
Includes dual Ethernet port connectivity via Modbus TCP/IP and serial RS485 through Modbus RTU support. Communication enables AcuIOM configuration through Acuview 2 for Easy integration with SCADA, PLCs, and BMS platforms.
STANDALONE OPERATION
The AcuIOM can function as an independent I/O module or be paired with compatible any third-party power meters or Acuenergy meters such as AcuRev 4100, AcuDC-260, AcuDC-300 to expand system capabilities.
 Analog I/O |
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ANALOG I/O
Capture high density voltage or current analog inputs from multiple sensors, while analog outputs deliver control signals and setpoint values to connected devices. Ideal for temperature, pressure, level and process feedback signals.
 Digital I/O & Relay |
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DIGITAL I/O & RELAY
Digital inputs support pulse acquisition and device status monitoring. Digital outputs provide reliable control signaling, and relay outputs enable direct switching of external devices.
 Ethernet & RS485 |
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ETHERNET & RS485
Includes dual Ethernet port connectivity via Modbus TCP/IP and serial RS485 through Modbus RTU support. Communication enables AcuIOM configuration through Acuview 2 for Easy integration with SCADA, PLCs, and BMS platforms.
 Standalone Operation |
|---|
STANDALONE OPERATION
The AcuIOM can function as an independent I/O module or be paired with compatible any third-party power meters or Acuenergy meters such as AcuRev 4100, AcuDC-260, AcuDC-300 to expand system capabilities.
Analog I/O
Digital I/O & Relay
Ethernet & RS485
Standalone Operation
AcuIOM Applications
Energy and Power Monitoring
Extends the functionality of energy meters by integrating external sensors and control signals, enabling monitoring of auxiliary parameters such as temperature, pressure, and flow, while collecting pulse outputs from electrical, water, and gas meters. It also supports load shedding, alarms, and control actions based on measured conditions.
Data Centers and Critical Facilities
The AcuIOM monitors environmental conditions and equipment states, enables alarm signaling and control for critical infrastructure, and supports redundancy and distributed I/O architectures.
Industrial Automation and Process Control
Collects analog and digital signals from HVAC, lighting, and building control equipment, controls pumps, fans, valves, and other equipment using digital and relay outputs, and integrates seamlessly with PLCs and SCADA systems using Modbus RTU or Modbus TCP/IP.
Building Automation Systems (BAS)
The Universal I/O Module interfaces with HVAC, lighting, and building control equipment, monitors digital statuses such as contact closures, run signals, and alarms, and provides analog outputs for control and setpoint adjustment.
Retrofit and System Expansion
Adds I/O capability to existing systems without replacing primary controllers, is ideal for system upgrades where additional monitoring or control points are required and operates as a standalone remote I/O module.
AcuIOM Product Map
AcuIOM Models
AcuIOM 1 | AcuIOM 2 | AcuIOM 3 | AcuIOM 4 | |
|---|---|---|---|---|
| Analog Inputs | 8 | 16 | ||
| Analog Outputs | 2 | 4 | ||
| Digital Inputs | 14 | 28 | ||
| Digital Outputs | 2 | 4 | ||
| Relay Outputs | 2 | 2 | ||
| Communication | Ethernet, RS485 | |||
| Mounting | 35 mm DIN Rail | |||
| SOE Log | 200 FIFO Entries | 200 FIFO Entries | ||
| Software Configuration | Acuview 2 | |||
AcuIOM 1 |
|---|
| Analog Inputs | 8 |
|---|---|
| Analog Outputs | 2 |
| Communication | Ethernet, RS485 |
| Mounting | 35 mm DIN Rail |
| Software Configuration | Acuview 2 |
AcuIOM 2 |
|---|
| Analog Inputs | 16 |
|---|---|
| Analog Outputs | 4 |
| Communication | Ethernet, RS485 |
| Mounting | 35 mm DIN Rail |
| Software Configuration | Acuview 2 |
AcuIOM 3 |
|---|
| Digital Inputs | 14 |
|---|---|
| Digital Outputs | 2 |
| Relay Outputs | 2 |
| Communication | Ethernet, RS485 |
| Mounting | 35 mm DIN Rail |
| SOE Log | 200 FIFO Entries |
| Software Configuration | Acuview 2 |
AcuIOM 4 |
|---|
| Digital Inputs | 28 |
|---|---|
| Digital Outputs | 4 |
| Relay Outputs | 2 |
| Communication | Ethernet, RS485 |
| Mounting | 35 mm DIN Rail |
| SOE Log | 200 FIFO Entries |
| Software Configuration | Acuview 2 |
AcuIOM FAQ
Does the AcuIOM work with my existing Accuenergy meter?
Yes. The AcuIOM can operate as a standalone remote I/O module or be paired with compatible Accuenergy power and energy meters to expand system-level monitoring, data acquisition, and control capabilities. It is suitable for applications that require additional analog inputs, analog outputs, digital inputs, digital outputs, or relay outputs.
Will AcuIOM work with third-party devices?
Yes. AcuIOM supports open communication protocols, including Modbus RTU, Modbus TCP/IP, BACnet MS/TP, and BACnet/IP, allowing integration with compatible PLCs, SCADA systems, building management systems, gateways, and other automation platforms.
What is the device limit?
The device limit will depend on the AcuIOM model, each model supports a different number of input/output functions.
Is there a built-in webserver?
AcuIOM does not include a built-in webserver. Configuration and commissioning are performed through Acuview 2 software. Web-based monitoring or control can be supported when AcuIOM is integrated with a compatible gateway or web-enabled host system.
What is the maximum distance between connected devices?
For RS485 communication, the maximum recommended cable distance is 1200 m. Actual communication performance depends on cable type, baud rate, installation environment, number of connected devices, termination, grounding, and electrical noise conditions. For Ethernet communication, standard Ethernet installation practices and distance limits should be followed.
How do I scale the analog output signal?
Analog output scaling is configured through Acuview 2 software. Users can select the analog output signal type, engineering unit, output high and low limits, and signal curve settings. Once configured, the AO channel can output a voltage or current signal based on commands from a PLC, DCS, gateway, or other compatible host system.
Is there a selectable range within AO, such as 0–20 mA / 4–20 mA and 0–5 V / 0–10 V?
AcuIOM analog output channels support selectable voltage and current output ranges, including 0–10 V, 2–10 V, 0–20 mA, and 4–20 mA. The 0–5 V output range is not listed as a standard AO range.
Can this device connect to AcuCloud?
AcuIOM can be integrated into an Accuenergy monitoring system through compatible communication and gateway devices. AcuCloud connectivity depends on the overall system architecture and the gateway, or host device used in the installation.
Can this device connect to AcuHMI?
Yes, AcuIOM can be used with compatible HMI systems through supported communication protocols such as Modbus RTU, Modbus TCP/IP, BACnet MS/TP, or BACnet/IP. Integration depends on the selected HMI model, protocol support, and system configuration.
Can the device be wireless?
AcuIOM does not include native wireless communication. It supports wired RS485, Ethernet, and USB communication. Wireless access may be implemented through an external wireless router, bridge, or gateway where required by the application.
Can this device control a switch or turn off power?
The AcuIOM is recommended to be used with an intermediate relay, which controls the output device by switching or turning off its power.
Can I link multiple AcuIOM devices together?
Yes. Multiple AcuIOM modules can be connected within the same system using RS485 or Ethernet communication. Different AcuIOM models can be mixed in the same installation depending on the required I/O configuration. For RS485 networks, proper daisy-chain wiring, termination, grounding, and device addressing are required.