Siemens SIMADYN D - Page 172

Communications support modules
6-24 Hardware - SIMADYN D
Edition 12.2004
Please compare the following connection examples:
"P
"M
+Iq
+RxD
-RxD
-Iq
Cable
capacitance
+TxD
-TxD
a)
"P
"M
+Iq
+RxD
-RxD
-Iq
Cable
capacitance
+TxD
-TxD
b)
Fig. 6-5: Unfavorable cable connection:
Current source and transmitter at different ends
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