Kramer Electronics user manual Controlling the VA-8xl, Controlling a Single VA-8xl Unit

6 Controlling the VA-8xl

You can control a single VA-8xlunit (see Section 6.1) or configure up to a 120 channel balanced stereo audio amplifier, using 15 units via RS-485 or RS-232 (see Section 6.3).

6.1Controlling a Single VA-8xl Unit

To connect and control a single VA-8xlunit, connect the following to the rear panel:

•PC or other controller, see Section 6.2: “Preparing the RS-232 Port on a Single Unit”

•Set the DIP-switches, see Section 6.2.1

•Power cord

6.2Preparing the RS-232 Port on a Single Unit

You can connect to the unit via a crossed RS-232 connection, using for example, a PC. A crossed cable or null-modem is required as shown in method A and B respectively. If a shielded cable is used, connect the shield to pin 5.

Method A (Figure 7)—Connect the RS-232 9-pin D-sub port on the unit via a crossed cable (only pin 2 to pin 3, pin 3 to pin 2, and pin 5 to pin 5 need be connected) to the RS-232 9-pin D-sub port on the PC.

Note: There is no need to connect any other pins.

9	5	9	5
	4		4
8		8
	3		3
7	2	7	2
6	1	6	1

PC

Figure 7: Crossed Cable RS-232 Connection

Hardware flow control is not required for this unit. In the rare case where a controller requires hardware flow control, short pin 1 to 7 and 8, and pin 4 to 6 on the controller side.

VA-8xl - Controlling the VA-8xl 11