Cable length from field instruments to the control room
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What is the maximum cable length from the field instruments to the DCS in the control room? Is there a difference in the signal transmission distance for digital and analog signals, as well as temperature signals?
The maximum cable distance from the field instruments to the DCS in the control room can vary depending on the specific circumstances. Generally, the transmission distance for digital signals is relatively short, usually not exceeding 1000 meters； The transmission distance for analog and temperature signals can be longer, generally around 2000–3000 meters, but in practical applications, a comprehensive consideration of the specific circumstances is necessary. It should be noted that the signal transmission distance is affected by factors such as cable diameter, cable material, and signal interference; therefore, on-site testing and calculations are required to determine the appropriate cable length. .