S7-200 Specifications
A-90
S7-200 Programmable Controller System Manual
A5E00066097-02
A.17 PC/PPI Cable
Order Number: 6ES7 901-3BF20-0XA0
General Characteristics
Supply voltage 14.4 to 28.8 VDC
Supply current @ 24 V nominal supply 50 mA RMS max.
Direction change delay: RS-232 start bit edge
received to RS-485 start bit edge transmitted
1.2 µS max.
Direction change delay: RS-232 stop bit edge
received to RS-485 transmission disabled
1.4 character times max.
(1.4 x 11/baud) = 1.6 ms @ 9600 baud
Propagation delay 4 µS max., RS-485 to RS-232,
1.2 µS max., RS-232 to RS-485
Isolation 500 VDC
RS-485 Side Electrical Characteristics
Common mode voltage range -7 V to +12 V, 1 second
3 V RMS continuous
Receiver input impedance 5.4K Ω min., including termination
Termination/bias 10K Ω to +5V on B, PROFIBUS pin 3
10K Ω to GND on A, PROFIBUS pin 8
Receiver threshold/sensitivity +/- 0.2 V, 60 mV typ. hysteresis
Transmitter differential output voltage 2 V min. @ R
L
= 100 Ω
1.5 V min. @ R
L
= 54 Ω
RS-232 Side Electrical Characteristics
Receiver input impedance 3K Ω min., minimum
Receiver threshold/sensitivity 0.8 V min. low, 2.4 V max. high,
0.5 V typical hysteresis
Transmitter output voltage +/- 5 V min. @ R
L
= 3K Ω
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