Issue
What is the wiring for the RS-232 A, RS-232 B, RS-485 A, RS-485 C, and 10Base-T ports on a Xenta Server?
Product Line
Satchwell MicroNet, TAC INET, TAC Vista
Environment
- Xenta Servers
- Xenta 511, 527, 555, 701, 711, 721, 731, 913
- BACnet/IP
- BACnet MS/TP
- M-Bus
- C-Bus
- Lon
- Modbus
Cause
The wiring and pin outs for the Xenta Server hardware is detailed in chapter 2.1.2 of the TAC Xenta 500/700/911/913 Product Manual .
Resolution
The ports and wiring is unique for each port.
RS-232 A port
For serial communication it is typical to only connect the RX, TX, and Ground pins.
| Pin | 3 | 4 | 5 |
| Serial Cable | RX | TX | Ground
|
RS 232 B port
10 Base-T port (Web connection)
Note: The Xenta 913 also supports BACnet/IP and Modbus TCP/IP on this port.
RS 485 A port (Modbus)
Note: The Xenta 913 also supports BACnet MS/TP on this port.
If two wire communication is being used then only use pins 5 and 6.
| Pin | 5 | 6 |
| + | - |
If four wire communication is being used then all four pins will be used.
| Pin | 5 | 6 | 7 | 8 |
| TX + | TX - | RX + | RX - |
RS485 C port (I/NET)
This port is used for I/NET communication.
| Pin | 19 | 20 |
| + | - |
