Technical data • Individual components
168
Automation PC 810 with GM45 CPU board user's manual V1.28
The setting for the I/O address and the IRQ can be changed in the BIOS setup (under "Advanced" - submenu
"Main board/Panel Features" - submenu "Legacy Devices", setting "COM E"). Please note any potential conflicts
with other resources when changing this setting.
3.10.3.6 RS232 - Bus length and cable type
The maximum transfer rate of 115 kbit/s depends on the type of cable being used.
Distance [m]
Transfer rate [kbit/s]
≤ 15
Typ. 64
≤ 10
Typ. 115
≤ 5
Typ. 115
Table 125: RS232 - Bus length and transfer rate
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 cables
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
4x 0.16 mm² (26AWG), tinned Cu 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 (22AWG/19), tinned Cu wire
PE
≤ 59 Ω / km
Outer sheathing
Material
Features
Cable shielding
PUR mixture
Halogen-free
From tinned copper wires
Table 126: RS232 - Cable requirements
3.10.3.7 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.
Distance [m]
Transfer rate [kbit/s]
1200
Typ. 115
Table 127: RS422 - Bus length and transfer rate
The material used for the cable should preferably have all or most of the following properties in order to reach an
optimal transfer rate.
RS422 cables
Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
4x 0.25 mm² (24AWG/19), tinned Cu 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 (22AWG/19), tinned Cu wire
PE
≤ 59 Ω / km
Outer sheathing
Material
Features
Cable shielding
PUR mixture
Halogen-free
From tinned copper wires
Table 128: RS422 - Cable requirements
3.10.3.8 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.
