If the instruments at the work site are located far away from the control room, where should the control system be placed?
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The instruments at our work site are located far away from the control room (up to 700 meters away). So where should the control system be placed? Should it be placed in the control room or on-site? If the system cabinets are placed in the control room, the cables running from the instruments on site to the control room are very long, which can lead to signal attenuation; moreover, the cost of such cables is extremely high ； If the system cabinets are placed on-site, the signals are transmitted to the control room via communication optical cables; however, this approach requires consideration of corrosion issues on-site as well as the power supply for the cabinets. Which option should be chosen? I would appreciate your advice!
I seem to have seen this post before, but it wasn’t in this forum. Looking at your requirements for setup, 700 meters isn’t really a long distance at all; the control station can be placed in the control room and connected to the site via fiber optics, with operation stations set up at the site itself. If it is installed on-site, it is necessary to ensure that the control room is explosion-proof, corrosion-resistant, and protected against electromagnetic interference, as well as to maintain a positive pressure environment in the on-site control room.
Construct an instrument cabinet room between the site and the control room, with fiber optic connections between the cabinet room and the control room.
This requires some comparison – it’s necessary to take into account human and material resources, and conduct a thorough comparison; it shouldn’t be difficult to resolve
Reply to 3# pdslch: Consider it as remote IO then. Can the points of the gauge be handled in this way? Additionally, remote IO has advantages, but it also has disadvantages. Is there a somewhat clearer standard to determine when remote IO can be used and when it is not allowed?
An instrument cabinet is installed on-site to house the control system and an operation station, to facilitate work for the personnel on site; optical fibers are connected to the central control operation station. The power supply cables are not a problem; running 2 UPS and mains cables is much simpler than running dozens of instrument cables.