Ethernet remote I/O modules add conditional logic computing
Conditional logic has been added to Acromag’s BusWorks NT series remote I/O modules.
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. Analogue I/O models feature eight differential or 16 single-ended inputs for monitoring current or voltage signals. Discrete I/O models provide 16 tandem I/O 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 mV ranges.
The conditional logic increases the functionality with a system of rules that allows extremely complicated decisions based on “yes/no” questions.
For example, reading an analogue 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, TTL, and relay control signals networked on one IP address. The module is designed to save space. It requires only 25mm of DIN rail per module.
The Ethernet I/O modules distribute 9.0 to 32V DC power along the DIN rail bus to expansion modules. They also carry hazardous location approvals, high noise immunity and -40 to +70 degrees C operation for use in harsh environments.
The conditional logic capability allows users to implement rule-based control functions without programming, explained Robert Greenfield, Acromag’s business development manager.
Profinet communication is planned for release soon. Each module will support all three protocols which 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. Multi-cast capability is included.
More models will release over the coming months with additional I/O functions.
Acromag has been developing and manufacturing measurement and control products for more than 60 years. It offers a complete line of industrial I/O products including process instruments, signal conditioning equipment, data acquisition boards, distributed I/O systems, and communication devices.
