SM500A—Automatic Switching System
Black Box Corporation
31
990-000-0001-E8
5 Control via ASCII
5.1 DIP Switch (S1) Setting
Control via ASCII requires setting the toggles on DIP switch S1 located on the Advanced
Control Card (SM533-C or SM534-C). Figure 5.1 shows the location of DIP switch S1.
To enable ASCII control:
1.
Set the toggles on DIP Switch S1 on the Advanced Control Card to the following
positions:
S1, toggles 3:
Set to ON.
S1, toggles 1, 4 to 8:
Set to OFF.
Figure 5.1. DIP Switch (S1) location on Advanced Control Cards SM533-C and SM534-C
5.2 ASCII Local Configuration
Connect the COM1 port
1.
Using a terminal or terminal emulation program on a PC (HyperTerminal, for example),
configure the terminal communication settings as follows.
Baud rate: 19200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
2.
Connect a straight DB9 cable (serial RS232) from the terminal or PC to the COM1 port
on the Advanced Control Card (figure 5.2).
3.
Verify proper communication by pressing “Enter” on your keyboard. The chassis should
respond with “1:OK” or similar.
4.
Set the echo using the command, “SET RACK 1 ECHO ON”.
