Upstream and midstream oil and gas locations are always looking for ways to cut costs. Since their sites typically have hazardous gasses and vapors present, their wiring methods and instruments have to be rated Class I Div 1.
One consideration to reduce your cost per point monitoring at these sites is to utilize the HCS HART Concentrator System by reading the HART signal from your field instruments. HART allows multiple instruments to be installed on a single twisted pair. Rather than using an individual twisted pair per instrument and Intrinsically Safe barriers or hard conduit, you can use one HCS and one IS barrier with multidropped instruments on one twisted pair and convert the HART data to MODBUS RTU. The HCS can accept up to 16 multidropped instruments. The actual number of multidropped transmitters is dependent upon the power your IS barrier allows into the field. The local RTU can then read multiple instruments via the MODBUS RTU signal. The HCS is approved for installation in Class I Div 2/Zone 2 areas and supports both RS-232 and RS-485 physical layer networks. The HCS is configured via a free Windows PC program and sets up in just a few minutes.
Key Attributes:
- Polls between one and 16 HART instruments and converts data to MODBUS RTU
- Class I Div 2/Zone 2 approval
- -40 to 85C ambient operating temperature
