Revision C • 10/07
HARRIS CORPORATION
2-16
2 Installation
that must be tied to +5 to +40 volts through the
Enable Logic Inputs pin.
Most outputs are isolated solid-state relay con-
tacts commoned to one pin. The exceptions are
the two warning relay outputs which are isolated
dry contacts. The common pin can tie to ground
(for low logic outputs) or to a logic voltage of up
to 60 volts at 350 mA (for high logic outputs).
Several +5 volt supply and ground pins are avail-
able on each connector, but these should only be
used to power isolated control panels. Ground and
logic voltages should always be sourced from the
peripheral device to maintain isolated operation.
Control Room Logic
This 14-pin connector has two isolated relay
contacts (pins 4 and 5) for controlling a warning
lamp interface like the Harris WL-2. It is activated
when any channel with a control room mic as its
source is turned On. This action will also mute the
Control Room Monitor audio output.
The other three logic outputs (commoned to-
gether on pin 10) are: CR dim on pin 12 (typically
activated when receiving talkback), CR mute on
pin 11 (activated when the warning output is ac-
tive), and talkback on pin 13 (activated by receiv-
ing Talk to CR logic). These outputs can be used
to control external speaker switching circuitry or
be used for tally indicators.
There are two external logic inputs for remotely
dimming monitors (on pin 9) or muting the moni-
tors (on pin 8). To use these inputs, pin 14 must
be tied high (+5 to +40 VDC). The logic inputs are
triggered by being pulled low.
Studio Logic
This 14-pin connector has the same connections
as the control room connector, except they’re for
a talk studio or voice room. There are two isolated
relay contacts (pins 4 and 5) for controlling a warn-
ing lamp interface like the Harris WL-2. It is acti-
connectors. The “binding” of the audio and logic
connections is set using VMCC which is covered
in chapter 4, RMX
digital
Server and in Appendix
A, VMCC.
CONNECTION QUICK GUIDES
Pages 2-18 to 2-24 have Quick Guides covering
the connections for each card or component along
with audio and logic connector pinouts and sig-
nal descriptions. Logic block diagrams are shown
on page 2-13. Here are the Quick Guide pages:
• Frame and Console Display: page 2-18
• KSU card: pages 2-19 thru 2-22
• 8-Input Expansion card: page 2-23
• VistaMax connections: page 2-24
Pages 2-25 to 2-27 show examples of typical
logic connections to the Assignable Logic connec-
tors from a mic remote control panel, a CD player
and a digital delivery system.
Note: For complete isolation of the console and
a peripheral device, use only the opto-isolated con-
trol connections. Both logic ground and +5 VDC
are referenced to the console’s power supply and
ground and should only be connected to isolated
devices like mic control panels or other Harris
Accessory Panels. Connecting logic ground to a
non-isolated device may result in a ground loop
between the console and the peripheral device.
LOGIC INTERFACE
Logic connector pinouts and block diagrams for
the four types of logic connections on the RMX-
digital
(Control Room, Studio, Cue/Talk, Assign-
able) are shown on page 2-13.
Logic inputs are shown on the left side and logic
outputs are shown on the right side of the block
diagrams. Logic inputs, noted by the (-) symbol,
are active low. They are isolated by opto-couplers
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