4-Wire P-NET cable
4-WIRE P-NET specifies the use of a shielded cable having 2 individual twisted pairs.
The communication pair must have a characteristic impedance of 100 to 120Ω and a minimum core cross-section of 0.22mm² / 24 AWG. To ensure maximum signal integrity over long bus cables, it is recommended that the core cross-section of the communication pair be increased.
|Bus length||Recommended core cross-section|
|0 - 100m||Minimum 0.22 mm² / 24 AWG|
|100 - 400m||Minimum 0.34 mm² / 22 AWG|
|400 - 1200m||Minimum 0.50 mm² / 20 AWG|
The size of the power pair should be calculated in consideration of maximum current, voltage drop, cable resistance, bus length etc.
Cable, recommended for 4-WIRE P-NET
Cable for 4-WIRE P-NET must be carefully selected to ensure stable communication as well as for providing sufficient power for all devices.
|Resistance in wire|
The values in the above table are only intended as a guide; wire cross section area and resistance vary by cupper alloy, number of stranding etc.