the power supplies are changed to Power-One units the filter
must be removed before the matrix is powered up.
The DB-25 connector labeled GP OUT connects the matrix to
eight double-pole double-throw (DPDT) relays with contact
ratings of 30 VDC at 1A.
Each general-purpose output has a relay inside the Eclipse HX-
Median matrix. When a general-purpose output is inactive, the
associated common pin on the GP OUT connector will be
shorted to the relevant normally closed pin. When a general-
purpose output becomes active, the short between the common
pin is broken and a new connection is made between the
common pin and the normally open pin.
Figure 4-14: Pin configuration of the GPO connector
General-Purpose Inputs Connector (GP IN)
The DB-25 connector labeled GP IN connects the matrix to eight
local general-purpose inputs (GPIs).
An external device such as a foot switch, a panel-mounted
switch or the logic output of some other device can be
connected to the GP IN connector. When the external device is
activated, it sends a control signal into the matrix to perform
one of several preset functions, such as turning a user panel’s
microphone on or off, muting a microphone’s output, or turning
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