B&R Industries Automation PC 620, User Manual

Page: 151 / 512

Technical data • Individual components
Chapter 2
•
Te
chn
ica
l da
ta
151 Automation PC 620 User's Manual V 1.90
The material used for the cable should preferably have all or most of the following properties in
order to reach an optimal transfer rate.
Bus length and cable type RS422
The maximum transfer rate of 115 kBit/s depends on the cable type being used.
The material used for the cable should preferably have all or most of the following properties in
order to reach an optimal transfer rate.
RS232 cable Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield 4 x 0.16 mm² (26AWG), tinned Cu wire
PU
≤
82 Ohm / km
Wires stranded in pairs
Paired shield with aluminum foil
Grounding line
Cable cross section
Wire insulation
Conductor resistance 1 x 0.34 mm² (22AWG/19), tinned Cu wire
PU
≤
59 Ohm / km
Outer sheathing
Material
Properties
Entire shielding PUR mixture
Halogen free
From tinned cu wires
Table 80: RS232 cable requirements
Distance [m] Transfer rate [kBit/s]
1200 Type 115
Table 81: Bus length and transfer rate RS422
RS422 cable Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield 4 x 0.25 mm² (24AWG/19), tinned Cu wire
PU
≤
82 Ohm / km
Wires stranded in pairs
Paired shield with aluminum foil
Grounding line
Cable cross section
Wire insulation
Conductor resistance 1 x 0.34 mm² (22AWG/19), tinned Cu wire
PU
≤
59 Ohm / km
Outer sheathing
Material
Properties
Entire shielding PUR mixture
Halogen free
From tinned cu wires
Table 82: RS422 cable requirements