Analog IO modules with HART communications

Opto 22's SNAP-AIMA-iH and SNAP-AOA-23-iH two-channel analog input and output modules use HART communications to extract status, diagnostics, and other information to increase uptime, improve productivity, and enhance safety.

09/26/2014


Opto 22's SNAP-AIMA-iH and SNAP-AOA-23-iH two-channel analog input and output modules use HART communications to extract status, diagnostics, and other information to increase uptime, improve productivity, and enhance safety. Courtesy: Opto 22Opto 22's SNAP-AIMA-iH and SNAP-AOA-23-iH two-channel analog input and output modules use HART communications to extract status, diagnostics, and other information from smart devices such as field-mounted process transmitters and analyzers. This information can be used by the automation system and/or the asset management system to increase uptime, improve productivity, and enhance safety.

The SNAP-AIMA-iH analog input module has two isolated 4-20 mA input channels, and the SNAP-AOA-23-iH output module has two isolated 4-20 mA output channels. Each channel features an integrated HART modem that allows the channel to communicate digitally with the HART FSK (frequency-shift keying) signal imposed on the 4-20 mA current loop, enabling communication with the target smart device. 

The SNAP-AIMA-iH analog input module is categorized by the HART protocol as a current input connection type, which means that the module is a low-impedance device. The SNAP-AOA-23-iH analog output module is categorized by the HART protocol as a current output device, which means that each channel can provide the required loop current and is a high-impedance device. 

Each module also includes LED indicators to provide status information, such as HART channel operation, communication errors, or zero loop current or voltage reading. Both analog modules are transformer isolated as well as optically isolated from all other modules and from the I/O processor. 

Opto 22

www.opto22.com 

- Edited by CFE Media. See more Control Engineering I/O system and module products.



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