VEGA VEGACOM 557 Profibus FMS - Manual (Page 9)

VEGACOM 557 Profibus FMS 9
Product description
PROFIBUS interface
Standards conformity to DIN 19 245, part 1 and part 2
to pr EN 50 170
acc. to ISO 7498
Interface standard RS 485
Network topology linear bus (active bus terminator on both
ends), stubs are possible
Number of stations per segment
- without repeater
1) 32 stations
- with repeater up to 127 stations
Max. bus length
- without repeater
100 m with 12 Mbits/s
- cable A 200 m with 1500 Kbits/s up to 1.2 km with
93.75 Kbits/s
- cable B 200 m with 500 Kbits/s up to 1.2 km with
93.75 Kbits/s
- with repeater up to the 10 km range
Connection cable 2-wire screened 2) , twisted
Transmission half-duplex, serially asynchronous, slip resistant
synchronisation
Transmission rate 3) 9.6; 19.2; 93.75 kbits/s up to 1.2 km
187.5 kbits/s up to 600 m
500 kbits/s up to 200 m
Coding system NRZ code
Number of bits 11 Bits: 1 start bit, 8 data bits, 1 parity bit,
1 stop bit
Parity EVEN
Data backup LRC
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 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 protective measures
Reliable separation acc. to VDE 0106, between power supply, LOGBUS,
part 1 DISBUS, PC and PROFIBUS connection
- reference voltage 250 V
- test voltage 3 kV
1) Repeater = line amplifier (possibly are at least 3, partly up to 10)
2 ) Depending on the ambient conditions (EMC), screening can be deleted
3) Adjustable via DIL switch on the component