Technical Data - Siemens SIMATIC NET OBT Operating Instructions Manual

Technical data

Table 9-1 Technical specifications
General
Operating voltage (safety extra-low voltage, SELV or to NEC
Class 2)
Current consumption at 24 V input
Bleed resistance between terminal M and terminal
Transmission speed
Setting the transmission speed
Operating mode
Bit error rate
Input channel 1 to 3
Bit length
jitter
Output channel 1 to 3
Bit length
jitter
Signal latency (any input/output)
Cascading depth optical bus
Electrical channel
Input/output signal
Input dielectric strength
Minimum current at 5 V (for terminators)
Electrical isolation to 24 V input
Optical channel
Optical source
Injectable optical power
– with plastic fiber 980/1000
– with PCF fiber 200/230
Sensitivity of receiver
– with plastic fiber 980/1000
– with PCF fiber 200/230
Wavelength
PROFIBUS Optical Bus Terminal (OBT)
Operating Instructions, 06/2022, C79000-G8976-C122-08
24 V= (19.2 V to 28.8 V)
max. 180 mA
11 Mohms
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
performed automatically
optical bus
<10
-9
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 latency
RS-485 level
-7 V to +12 V
10 mA
Isolation due to functionality, not safety!
LED
P
T(min)
– 5.9 dBm
– 16 dBm
P
R(min)
-20 dBm
-22 dBm
640 nm to 660 nm
9
P
T(max)
+0.5 dBm
-1.5 dBm
P
R(max)
0 dBm
-2 dBm
35