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ServSwitch Uno/Duo USB Installation and Use Page 61

4.20 Switching channels by sending RS232 data

You can switch the ServSwitch Uno/Duo USB remotely by sending RS232 data to

the serial communications port (located on the rear panel adjacent to the power

connectors). All data should be sent using the following RS232 protocol.

Baud: 19200, bits: 8, stopbits: 1, parity:none

No handshaking is implemented but valid command characters will be echoed back

to the sender.

The top nibble (4 bits) of the command byte defines the user port that is to be

switched (1=port 1, 2=port 2). The bottom nibble defines the computer port that the

user port is to be switched to (e.g. 0=port 1, 1=port 2, E=port 15, F=port 16).

For example:

Hexadecimal code 14 switches user port 1 to computer port 5

Hexadecimal code 28 switches user port 2 to computer port 9

Hexadecimal code 2D switches user port 2 to computer port 14

Special codes are:

Hexadecimal code 71 switches user port 1 to computer port 0 (off)

Hexadecimal code 72 switches user port 2 to computer port 0 (off)

The 9-pin female RS232 connector at the rear of the ServSwitch has the following

pinout:

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 81 82

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Black Box ACU5010A Spezifikationen Seite 62