Bus connector
7XV5103 Siemens Energy

When combining the required components for a RS485 bus, the corresponding application examples contained in this document can be of assistance.
The bus system with 9-pin SUB-D connectors has long been applied in systems with SIPROTEC protection devices, 7XV5 converters, and master units. Connection to the individual devices is achieved directly with a special Y-cable or with a corresponding adapter cable to devices with different termination methods. The bus terminates in a 9-pin SUB-D bus terminating connector with an integrated 220-Ω resistor.
On some SIPROTEC devices, the serial signals are routed to RJ45 female connectors on the communication module, as is the case, for example, with the redundant IEC 60870-5-103 module. There the bus is based on double-shielded CAT 5 patch cables. Connection of the individual devices to the two redundant buses is achieved via two special Y-adapter cables each. The buses each terminate with a RJ45 bus terminating connector with a 120-Ω resistor.
A combination of the two bus systems and the different device interfaces or a combination of the two systems is also possible using the Y-adapter cable 7XV5103-2BA00.
The special cable 7XV5103-7AAxx is used for the connection between the 7XV5662-xAD10 RTD-box and SIPROTEC 4 units (port C or port D with RS485 interface).