Installation manual

Authorized Service Personnel ONLY:

Global Back Plane Switch

NOTE: Not used when connected to Emix or MaxAir.

The global back plane switch is asserted when an operator defined GPIO input pin is

grounded. The operator can configure the switch to assert by a specific GPIO pin being

grounded, by any GPIO pin being grounded, or never by a GPIO pin. The pin selection

is configured via Ethernet or serial control using FrameMon Software (available from

Euphonix). The global back plane switch state is not dependent on which Switch Cards

are installed. It can be set and cleared with no Switch Cards installed.

The global back plane switch can also be triggered by a loss of MADI lock condition.

The operator can use FrameMon to configure which MADI signals on which cards will

be examined for lock. For the global back plane switch to be asserted by loss of MADI

lock, all examined MADI signals on all operational Switch Cards must be locked on the

Bank B connectors while any are not locked on the Bank A connectors.

The global back plane switch will continue to select Bank B until the condition is cleared

via the Ethernet or serial interface, or the operator moves the front panel toggle switches

for ALL operational cards to the “A” position. Returning any front panel switch to the

“Auto” position will re-initiate scanning for a new global back plane assertion.

The global back plane switch position will be preserved through power cycling. The

global back plane switch can not be asserted while the front panel toggle switches for

ALL operational cards are in the “A” position.

GPIO Output Pins

NOTE: Not used when connected to Emix or MaxAir.

The four GPIO output pins can be used to indicate either the position of the individual

back plane switches, one for each card. Or, they can be used to indicate the state of

the global back plane switch. If they are not configured to indicate the state of the

global back plane switch, they will always indicate the state of individual back plane

switches.

configured

to indicate the global back plane switch position, they can be

configured

that any single output pin, or all four output pins are asserted (logic low) when the global

back plane switch selects Bank B.

If not configured to indicate the global back plane switch position, each of the four

output pins will indicate the state of one of the four individual back plane switches.