VEGA VEGACOM 557 Profibus DP - Manual (Page 11)

VEGACOM 557 Profibus DP 11
Product description
1) Repeater = line amplifier
2) Baud rate is automatically adjusted
Profibus DP interface (RS 485)
Standards conformity to DIN 19 245, part 3
Interface standard RS 485
Network topology linear bus (active bus connection on both
ends)
Bus access hybrid bus access protocol acc. to DIN 19 245,
part 1
Max. number of bus participants 126 master and slave instruments
Communication structure point-to-point or multicast
Communication procedure cyclical or acyclical
Max. cable length
- without repeater 1)
Baud rate (kBit/s) 9.6 19.2 93.75 187.5 500 1500 12000
cable length (m) 1200 1200 1200 1000 400 200 100
- with repeater can be extended to the km-range
Connection cable screened 2-wire, twisted in pairs
Transmission half-duplex, serially asynchronous,
slip resistant synchronization
Transmission rate 2) 9.6; 19.2; 45.45; 93.75; 187.5; 500; 1500; 3000;
6000; 12000 Kbits/s
Telegraph formats acc. to DIN 19 245, part 1
E/A-data per DP-Slave VEGACOM 50E/2A Byte or 6E/6A Byte
Data backup Hamming distance HD = 4
Fuse +5V 100 mA, slow-blow
Electrical protective measures
Protection:
not mounted IP 00
in carrier BGT 596
or BGT LOG 571
- front side completely equipped IP 40
- upper and lower side
BGT 596 IP 00
BGT LOG 571 IP 20
- wiring side IP 00
in housing type 505
- front side IP 40
- other sides IP 30
Protection class II (in housing type 505)
Overvoltage category II
Electrical separation measures
Reliable separation acc. to VDE 0106, part 1 between power supply, LOGBUS, DISBUS,
PC-connection and respective interface
- reference voltage 250 V
- test voltage 2 kV