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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 ex tended 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
2TX Transmitter
3RX Receiver
4---- Not used
5GND 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 R S-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 Parit y, and 1 stop bit. This is often referre d to as 9600 8N1. When the unit
recognizes a complete command, it will p erform 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.”