Technical data
TOX_Manual_Process-monitoring-unit_CEP400T_en
43
4.12 Profibus interface
According to ISO/DIS 11898, isolated
Description Value
Transmission speed Cable length up to 100 m: max. 12000
kBit
Cable length up to 200 m: max. 1500 kBit
Cable length up to 400 m: max. 500 kBit
Cable length up to 1000 m: max. 187.5
kBit
Cable length up to 1200 m: max. 93.75
kBit
Wire cross-section min. 0.34 mm²4
Wire diameter 0.64 mm
Connecting line Shielded
At 0.25 mm²: up to 100 m
At 0.5 mm²: up to 350 m
Input offset voltage - 7 V/+ 12 V (to GND)
Output drive current -/- 55 mA (Udiff = +/- 1.5 V)
Number of subscribers per segment Without repeater: max. 32
With repeater: max. 126 (every repeater
used reduces the max. number of sub-
scribers)
Connecting line shielded, twisted surge
impedance
135 to 165 Ω
Capacitance per unit length < 30 pf/m
Loop resistance 110 Ω/km
Recommended cables Fixed installation UNITRONIC
®
-BUS L2/
FIP or UNITRONIC
®
-BUS L2/FIP 7-wire
flexible installation UNITRONIC
®
BUS FD
P L2/FIP
Node addresses 3 to 124
Description Value
Min. Max. of
Output differential voltage +/- 1.5 V +/- 5 V
Input differential voltage +/- 0.2 V +/- 5 V
Pin Profibus
3 RXD/TXD-P
4 CNTR-P (RTS)
5 0 V
6 + 5 V
8 RXD/TXD-N
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