Detection Lines
SENSORS LINES CABLES
Type of cable: 2-conductor cable (shielded suggested).
List of the minimum sections required that depend on the line length:
| Up to 500 mt. | cable 2 x 0.5 mm2 |
| Up to 1000 mt. | cable 2 x 1 mm2 |
| Up to 1500 mt. | cable 2 x 1,5 mm2 |
| Up to 2000 mt. | cable 2 x 2 mm2 |
| Up to 2500 mt. | cable 2 x 2,5 mm2 |
As far as the laying of cables is concerned, follow the below listed instructions:
- the cables must run at a proper distance from the power lines and must not be in the proximity of any noise sources (electric motors, radio links).
- the shield must be continuous on all the line and must be connected to the control panel cabinet (earth).
Type of cable: 2-conductor TWISTED pitch 10 cm and SHIELDED cable.
Sections concerning the line total length
(for the line "STYLE 6" or CLOSED LOOP, the operator must consider the loop length) which CAN NOT exceed 3000 metres and whose resistance must be lower than 40 Ohm.
| Up to 500 mt. | cable 2 x 0.5 mm2 |
| Up to 1.000 mt. | cable 2 x 1 mm2 |
| Up to 1.500 mt. | cable 2 x 1.5 mm2 |
| Up to 2.000 mt. | cable 2 x 2 mm2 |
| Up to 2.500 mt | cable 2 x 2.5 mm2 |
| Up to 3.000 mt | cable 2 x 3 mm2 |
As far as the laying of cables is concerned, follow the below instructions:
- suitable pipes
- the cables must run at a proper distance from the power lines and must not be in the proximity of any High Voltage
SLC loop shield wiring
Maintain the continuity of the shield wire throughout the loop, BUT DO NOT connect to any devices.
Connect the shield wire to the outside of the control panel cabinet and the cabinet to earth.
SLC loop contained in metal piping or in CONDUIT
In this case, DO NOT allow the shield drain or shield foil to touch the cabinet.
For Style 6 field wirings, connect ONLY ONE END of the shield to the negative side of Channel A.
Maintain the continuity of the shield wire throughout the loop, BUT DO NOT connect to any device.
PAY ATTENTION to the electric and electromagnetic noises! Troubles may often be due to: air-conditioning installations, engines or electric welding machines, electrical furnaces and elevators, radio links, etc.
Conventional GAS 4-20 mA Control Panels
Type of cable: 2-conductor cable (shielded suggested).
Sections concerning the line total length that anyway CAN NOT exceed 1000 metres.
| Up to 500 mt. | cable 3 x 1 mm2 |
| Up to 1.000 mt. | cable 3 x 1,5 mm2 |
Mains power
Power supply voltage: 230 V single phase +10% -15%. Frequency: 50/60 Hz.
Pay special attention when installing the system near to electromagnetic sources (radio repeaters, etc.).
Earth connection
The earth connection must be performed according to the CEI ed ISPLES rules or National rules. The resistance CAN NOT exceed 10 Ohm (to be measured at the well with disconnected mains)
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