Industrial Electronics

Ethernet expandable I/O modules now process IF/THEN/ELSE logic for rule-based I/O operation

09 August 2022

Acromag’s new BusWorks NT series remote I/O modules are now enhanced with conditional logic. The conditional logic increases the functionality with a system of rules that allows extremely complicated decisions based on relatively simple “yes/no” questions. For example, reading an analog or digital input value can trigger an action to happen as a result. This value could be used to control a relay when one or more conditions occur. Another example would be when a discrete input is ON and a temperature threshold is crossed. More complex math computation and logic are also an option.

Conditional logic is configured on the NT’s built-in web configuration page. No programming is required. The modules support up to 64 conditions using IF/THEN/ELSE statements.

NTE Ethernet I/O models have dual RJ45 ports and a webserver with Modbus TCP/IP and Ethernet/IP communication to monitor or control the internal I/O channels. An integrated DIN rail bus allows connections of up to three NTX expansion I/O modules. Each I/O module adds up to 16 input or output signals allowing a mix of voltage, current, temperature, transistor-transistor logic and relay control signals networked on one IP address. The space-saving design requires only 25 mm of DIN rail per module. Ethernet I/O modules distribute 9 V DC to 32 V DC power along the DIN rail bus to expansion modules. Hazardous location approvals, high noise immunity,and -40° C to 70° C operation make this I/O ideal for use in harsh environments.

“With this new conditional logic capability, users can easily implement rule-based control functions without programming,” stated Robert Greenfield, Acromag’s business development manager.

Source: AcromagSource: Acromag

The NT2000 series offers a broad variety of I/O signal processing options. Nine I/O configurations are available as either NTE Ethernet I/O or NTX expansion I/O models. Analog I/O models feature eight differential or sixteen single-ended inputs for monitoring current or voltage signals. Discrete I/O models provide 16 tandem input/output channels with either active high/low input and sinking/sourcing output. A six-channel mechanical relay output model is also available. For temperature monitoring, a thermocouple input model supports many sensor types and also millivolt ranges. More models will release over the coming months for additional I/O functions.

Profinet communication is planned for release soon. Each module will support all three protocols that are selectable using any web browser to configure the network settings and I/O operation. The modules typically function as a network slave, but also offer Acromag’s i2o peer-to-peer communication technology to transfer data between modules directly without a host or master in between. Multicast capability is included.

To contact the author of this article, email engineering360editors@globalspec.com


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