Technical Specifications - Siemens SIMATIC NET PROFIBUS Owner's Manual

Technical Specifications

Table 7-1 Technical Specifications
Technical Specifications
Power supply (safety extra–low voltage with reliable
isolation, SELV or complying with NEC Class 2)
Power consumption at 24 V input
Transmission rate
Transmission rate setting
Mode
Bit error rate
Input channel 1 to channel 3
Bit length
Jitter
Output channel 1 to 3
Bit length
Jitter
Signal delay time (any input/output)
Cascading depth of optical bus
Electrical channel
Input/output signal
Input dielectric strength
Minimum current at 5V (for terminating resistors)
Electrical isolation from 24V input
Optical channels
Optical source
Coupled optical power
– in plastic fiber 980/1000
– in PCF fiber 200/230
Receiver sensitivity
– with plastic fiber 980/1000
– with PCF fiber 200/230
PROFIBUS Optical Bus Terminal (OBT)
C79000-G8976-C122-02
24 VDC (18 V to 32 V)
max. 200 mA
12 Mbps, 6 Mbps, 3 Mbps, 1.5 Mbps, 500 Kbps, 187.5
Kbps , 93.75 Kbps, 45.45 Kbps, 19.2 Kbps, 9.6 Kbps
made automatically
optical bus
–9
<10
0.7 to 1.3 tBit
-0.03 to +0.03 tBit
0.99 to 1.01 tBit
-0.003 to +0.003 tBit
6 tBit
limited only by signal run time
RS–485 level
-7 V to +12 V
10 mA
Isolation due to function; not safety–related!
LED
P P
T(min) T(max)
– 5.9 dBm +0.5 dBm
– 16 dBm –1.5 dBm
P P
R(min) R(max)
–20 dBm 0 dBm
–22 dBm –2 dBm
7
7-1