Technical data • Individual components
124
Power Panel 500 user's manual V1.40
3.5.1.3.4 RS232 - Bus length and cable type
The maximum transfer rate of 115 kbit/s depends on the cable type being used.
Extension
Transfer rate
≤15 m
Typ. 64 kbit/s
≤10 m
Typ. 115 kbit/s
≤5 m
Typ. 115 kbit/s
Table 90: RS232 - Bus length and transfer rate
The material used for the cable should have all or most of the following properties in order to achieve an optimal
transfer rate.
RS232 cables
Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
4x 0.16 mm² (26 AWG), tinned copper stranded wire
PE
≤82 Ω/ km
Wires stranded in pairs
Paired shield with aluminum foil
Grounding line
Cable cross section
Wire insulation
Conductor resistance
1x 0.34 mm² (22 AWG / 19), tinned copper stranded wire
PE
≤59 Ω/km
Outer sheathing
Material
Features
Complete shielding
PUR mixture
Halogen-free
From tinned copper wires
Table 91: RS232 - Cable requirements
3.5.1.3.5 RS422 - Bus length and cable type
The RTS line must be switched on to switch the transmitter to active.
The maximum transfer rate of 115 kbit/s depends on the type of cable being used.
Extension
Transfer rate
1200 m
Typ. 115 kbit/s
Table 92: RS422 - Bus length and transfer rate
The material used for the cable should have all or most of the following properties in order to achieve an optimal
transfer rate.
RS422 cable
Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
4x 0.25 mm² (24 AWG / 19), tinned copper stranded wire
PE
≤82 Ω/km
Wires stranded in pairs
Paired shield with aluminum foil
Grounding line
Cable cross section
Wire insulation
Conductor resistance
1x 0.34 mm² (22 AWG / 19), tinned copper stranded wire
PE
≤59 Ω/km
Outer sheathing
Material
Features
Complete shielding
PUR mixture
Halogen-free
From tinned copper wires
Table 93: RS422 - Cable requirements
3.5.1.3.6 When operated as an RS485 interface
When operated in this mode, the pins of the RS422 default interface (1, 4, 6 and 9) must be used. Pins should
be connected as shown.
