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724-746-5500 | blackbox.com
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724-746-5500 | blackbox.com
Chapter 5: RS-232 Serial Interface
5. RS-232 Serial Interface
5.1 Connect a PC or Control System
For a complete list of commands, refer to the extended RS-232 Protocol Instruction Manual.
Figure 5-1. RS-232 DB9 connector.
Table 5-1. RS-232 serial interface pinouts.
Pin RS-232 Defintion
1 ---- Not used
2 TX Transmitter
3 RX Receiver
4 ---- Not used
5 GND Ground
6 ---- Not used
7 ---- Not used
8 ----- Not used
9 ---- Not used
5.2 RS-232 Protocol Commands
You can control the switch via the RS-232 serial control port to interface to a PC or similar third-party control system.
The serial communication parameters are 9600 baud, 8 bit, No Parity, and 1 stop bit. This is often referred to as 9600 8N1. When the unit
recognizes a complete command, it will perform the requested action. There is no delimiter character required.
0 = Enter the number
O = Enter the letter
NOTE: Make sure you use the correct keys for letter “O” and number “0.”