Distance for HART Communications

J
The HART specification HCF_SPEC-054 says "at least 1500 m" (5000 ft). This is provided that good quality low capacitance and large cross section cable is used. There is a 65 microsecond rule and some diagrams in the standard illustrating this. Most plants require minimum AWG 18 (0.75 mm2) cable anyway. You can easily find PE insulated cable with capacitance of 60 nF/km which is great.

Cheers,
Jonas
 
Jonas. Can I use Ethernet cable for RS485 comm in distances of 150 meters? I have done it before with no problems. Is there any potential harm of doing this?
 
Top