Problem:
Connecting data from PLCs in hazardous locations
Solution:
A major natural gas utility was looking to gain access to real-time or near real-time data communications from new PLCs in 340 locations across a stretch of pipeline. Plans called for the majority of these PLCs to be housed in specially constructed and certified enclosures along the distribution/transmission pipeline network. However, data must also be collected from hard-to-reach points along the pipeline.
The utility wanted to use a wired connection to capture data from the enclosures and a wireless product for the remote collection points to reduce on-site visits. Both solutions must convert Modbus/TCP data to serial and meet safety and security requirements for hazardous locations. Ultimately, the utility wanted a cost-effective, efficient solution that would reduce failure points and intensive manual labor.
Having had some previously successful experience with Digi products, the utility tested the Digi One IAP Haz serial server for the wired connections and the Digi Connect WAN IA hardened cellular router for the remote locations.
- Digi One IAP Haz performs industrial Modbus/TCP protocol conversion/bridging for the wired connections
- Digi Connect WAN IA utilizes “always-on” GSM or CDMA cellular networks to collect data from remote locations; also converts Modbus/TCP data to serial
- Both products offer Class 1, Division 2 certification, a key requirement for hazardous locations
- Extended operating temperature tolerance (-30° C to 60 ° C) eliminates need for expensive enclosures or built-in heaters
The Digi wired/wireless solution enabled the utility to quickly realize Return on Investment (ROI) by reducing points of failure since no manual labor, truck rolls, or extra equipment for Modbus/TCP conversion is needed.
Now you can...
Utilize wired and wireless connections to capture data from equipment in hazardous locations.
Solution: