Siemens SIMADYN D Hardware Manual page 172

Communications support modules
6-24
www.aotewell.com
Please compare the following connection examples:
a)
"P
+Iq
+RxD
-RxD
-Iq
"M
b)
"P
+Iq
+RxD
-RxD
"M
Fig. 6-5: Unfavorable cable connection:
Current source and transmitter at different ends
sales@aotewell.com
-Iq
Industry Automation
+TxD
Cable
capacitance
-TxD
+TxD
Cable
capacitance
-TxD
Hardware - SIMADYN D
Edition 12.2004
+86-755-8660-6182