With two embedded Ethernet switch ports, Moxa’s remote Ethernet I/O devices allow users 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.
It is designed with the customer in mind that it has been crafted as a watchdog for emergency power or link failures.
Moxa features on its data acquisition devices the 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.
Another good thing about this device is that users stay connected with Automatic Re connection. It is not new how 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.
This device likewise has a highly 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.
Lastly, is has 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.