3170-avs.ib.rev5.doc
page 10 of 16
16/10/2007
Wire per crosspoint operation
In most cases, the BCD encoded remote control system offers the most satisfactory way of controlling one or more
switchers. There are however, situations where it is necessary to provide a wire per crosspoint access for control and
/ or a line per crosspoint tally system.
Both of these facilities may be made available on the 3000 series in a number of ways.
3011 Series compatible:
The AVS-3170 provides an on board patching area for changing the switcher from BCD to WPX input using the PL
4 & PL 5 connectors.
To change to WPX mode the WPX links should be installed on the PCB where indicated on the PCB overlay and all
of the "Universal" links should be removed or cut.
A momentary contact closure to ground on the relevant control input will now cause the switcher to operate in the
same way as it would had the switch on the local control panel type CPS-3050 been depressed.
No complicated logic is required of a remote control to the switcher in this configuration. The CP-700 passive five-
button remote control may be used to operate the switcher or a custom switch panel may be fabricated.
If the CP-700 is used to operate the switcher the LED's for tally will be inoperative and the + Volts connection on
the CP-700 should not be connected.
The primary disadvantage of this method is that no tally is available on the switch lines. It is however the most
simple implementation for remote control and is ideally suited to external latching switches or external relay contact
closure.
Connections are as follows:
PL 4 & 5
1A N/C.
1B Ground.
2A
Switch 5 contact.
2B
Switch 4 contact.
3A
Switch 3 contact.
3B
Switch 2 contact.
4A
Switch 1 contact.
4B N/C.
5A N/C.
5B N/C.
1B
2B
3B 4B 5B
1A
2A
3A
4A
5A