Technical Specifications Of The Cs31 System Bus - ABB 07CR41 Operating Manual

3.2

Technical specifications of the CS31 system bus

Advant Controller AC 31 / Issued: 01.99
Type
Mode
Number of connection points
General data
- Cross-section
- Twists
- Resistance
- Impedance specification
- Capacity
- Shielding
- Line termination
Protocol
Data transmission control
Maximum length
Bus redundancy
Isolation
Refresh time
Baud rate
RS 485 multipoint serial interface
Half-duplex
1 master
max. 31 slaves
Twisted pair
0.22...0.8 mm²
> 10 per metre
≤ 100 Ω/km
100 to 150 Ω
< 150 nF/km
Braiding
Resistance 120 Ω, ¼ Watt, connected
to each end of the bus
CS31 (master/slave)
CRC
up to 500 m without amplifier
up to 2000 m with 3 amplifiers
(NCB or NCBR)
yes, with NCBR (bus amplifier)
yes, by optocoupler
2 ms minimum
typically 12 ms with 31 AC31 connection
points
187.5 kBauds
3 – 3 Technical specifications
3