Kramer Electronics VP-23RC user manual Dipswitch Settings, Function Description

Controlling the VP-23RC

8.2Controlling Additional Kramer Machines via RS-232 and RS-485

You can cascade other Kramer machines1 together with the VP-23RCvia the RS-485 port, and control them via the SWITCHER CONTROL RS-232 port using a PC.

To connect two Kramer VP-8x8Amachines to the VP-23RC, via RS-485, as illustrated in the example in Figure 13, do the following:

1.Connect the audio/video sources and acceptors on the VP-23RCand on the additional Kramer machines (refer to the relevant user manuals for installation instructions).

2.Connect the RS-232 port on the VP-23RCunit to the PC using the Null-modem adapter provided with the machine (recommended), as section

8￿ .1.1 describes.

3.Connect the RS-485 terminal block port on the VP-23RCto the RS-485 port on the first VP-8x8A. Connect the RS-485 port on the first VP-8x8Ato the RS-485 port on the second VP-8x8Amachine.

4.Set the dipswitches as follows:

￿Set the Machine number of each of the other units to a machine number other than machine number 1

￿Set Dip 4 ON on the VP-23RC(RS-485 TERM) and terminate the RS-485 line on the last unit

8.2.1The Presentation Switcher Section Dipswitches

The Switcher setup dipswitches are located in the SWITCHER CONTROL area of the rear panel. Table 8 and Figure 12 define the factory default dipswitch settings2:

Table 8: Dipswitch Settings

DIPS	Function	Description
1, 2, 3	Not used	Set to OFF	OFF
4	RS-485	ON for RS-485 Line Termination with 120￿;
	TERM	OFF for no RS-485 Line Termination	ON 1 2 3 4
			Figure 12: Default
			Dipswitch Settings

1 But not other VP-23RC machines

2 By default, all dipswitches are set to OFF

24 KRAMER: SIMPLE CREATIVE TECHNOLOGY