Versatile Communication

Moxa’s industrial data acquisition devices come with a variety of communication interfaces, such as serial ports, digital input/output channels, and AI/thermocouple channels, which can be used to connect devices used in any industry. In addition, both 2G and 3G cellular solutions are available for field site installation.

Moxa's Remote I/O and RTU controllers provide a direct interface between field devices and the control center for data collection and remote site monitoring. Moxa's RTU products are specifically designed for remote data transmission between complex virtual networks that are widely dispersed. Moxa enhances automation communications with versatile protocols that support Modbus/TCP for easy SCADA/HMI communication, HTTP for Internet access, SNMP I/O communication for IT-friendly network management, 3G wireless interface for mobile communications, and patented Active OPC Server™ for faster data access for SCADA/HMI systems.

Industrial Cellular Solutions (2G and 3G)

Is your device installed in a location where the network is locked down? Finding it difficult or expensive to run copper wire or fiber cabling to a location that needs network connectivity? If you answered yes to these questions then you can use cellular technology to increase your operation's efficiency and reduce the costs of monitoring remote sites and applications.

Thanks to the migration from GPRS (2.5G) to HSDPA (3G or 3.5G) technology, cellular networks can now transmit data with less network latency and greater bandwidth. With cellular technology, device communication over cellular networks is managed by licensed cellular providers. You can save development costs and time by leveraging the cellular providers' existing infrastructure. In addition, cellular networks use restricted, well-defined bands and are more secure compared to WLAN signals.


Ethernet (Modbus/TCP, TCP/IP, UDP, SNMP)

SNMP for Easy Environmental Monitoring

Moxa’s data acquisition devices support SNMP, which can be used to monitor all remote units over Ethernet. Each unit can be configured to send trap messages automatically to the SNMP manager when an event occurs at a local site. Users can define the trigger for the alerts easily through Moxa’s utility.

Easy to Use with Standard Protocols: Modbus/TCP, TCP/IP, UDP

Moxa’s Data Acquisition devices are all based on the Modbus protocol.

    Advantages of the protocol:

  • Open source means no license fees
  • Widely supported by SCADA and HMI software
  • Easy to use
  • Easy to integrate with a variety of devices
  • Low development cost
  • Readily available knowledge resources

Secure and Backup Communication

Secure Transmission with VPN

Computers that belong to a VPN use a second, “virtual” IP address to connect to the Internet. Instead of running across a single private network, some of the links between nodes that are part of a VPN use open network connections or virtual circuits on a larger network, such as the Internet. With the help of VPNs, cellular devices acting as a VPN client can initiate a connection with a VPN server. Once the connection is established, cellular devices can communicate with other network devices on the same private network.

Dual Ethernet Ports Make Wiring Easy

With two embedded Ethernet switch ports, Moxa's remote Ethernet I/O devices allow you to create daisy-chain topologies for easy cabling. In distributed Ethernet data acquisition applications, panels, units, and cabinets are often located at remote sites where space is limited. The daisy-chain capability of Moxa's remote Ethernet I/O devices allows them to be connected in series, either to each other or to other nearby Ethernet devices, drastically saving both space and wiring costs.

Designed with the Customer in Mind

Watchdog for Emergency Power/Link Failures

Moxa's data acquisition devices feature relay and output alarms. Relay contact outputs are used to warn engineers on the shop floor when power fails or a port link breaks, so that they can respond quickly with appropriate emergency procedures.

Stay Connected with Automatic Reconnection

Cellular service carriers disconnect idle mobile device connections in order to save bandwidth for other online users and applications. With Moxa's "Cellular Connection Always On" option, Moxa's IO devices can detect the cellular connection and reconnect to the network when it's disconnected. This is done by sending ICMP packages to tell the carrier that the device is still alive.

Reliable Connection Quality with Heartbeat Interval

The "heartbeat interval" is designed to ensure that the connection status between Moxa's data acquisition devices and Active OPC Server is alive. When the heartbeat interval is set and the network between Moxa's IO devices and Active OPC Server goes down, Active OPC Server will detect the stopped heartbeat and the Quality column in the Active OPC interface will display BAD to indicate that the connection was lost.

Complete Database with Auto Recovery

One of the benefits of using RTUs is that data can be collected over a network from a central site. Ideally, RTUs should be able to transmit data logs collected offline when a network reconnects. Moxa's DA-Center not only makes this possible, it also makes it easy. DA-Center provides a standard OPC interface that interacts with Active OPC Server for real-time data collection. After the network is connected, DA-Center will compare historical data stored on the SD cards located in individual devices with real-time data and then supplement any missing data by requesting re-transmission from the RTU.