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724-746-5500 | blackbox.com
Page 29
Chapter 7: RS-232 Serial Interface
7. RS-232 Serial Interface
Connect a PC or Control System Version Compatible V2.0
For a complete list of commands, refer to the extended RS-232 Protocol Instruction Manual.
Figure 7-1. RS-232 DB9 connector.
Table 7-1. RS-232 serial interface pinouts.
Pin
RS-232
Definition
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
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 = the number
O = the letter
