Harris Legacy 99-1300-0, Operation & Technical Manual

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2 Installation
Revision B • 1/03
H A R R I S C O R P O R A T I O N
2-35
FUNCTIONAL DESCRIPTION OF CONNECTION
Normally Open (N/O) contact output. A contact closure is generated while there is talkback to the Control Room.
The Common (C) contact is the Mute, Dim & T/B Tally Common output.
Isolated, Normally Open (N/O) and Common (C) contact outputs. A “contact closure” is generated anytime a
Control Room mic module is On-Air (assigned to any Program bus and turned On) or an External Mute command
is being received.
Conn5 to +40 VDC to this input enables the active low external control inputs Mute and Dim. If the
inputs are isolated (e.g., on a remote control panel), the +VDC can come from Logic 5VDC.
Mutes the Control Room monitors and triggers the Warning Relay when pulled low.
Dims the Control Room monitors by 12 dB when pulled low.
Normally Open (N/O) contact output. A contact closure is generated anytime a Control Room mic module is On-
Air (assigned to any Program bus and turned On), a possible mic feedback condition exists, or an External Mute is
received. The Common (C) contact is the Mute, Dim & T/B Tally Common output.
Normally Open (N/O) contact output. A contact closure is generated whenever the C/R monitors are dimmed by
talkback or by an external Dim command. The Common (C) contact is the Mute, Dim & T/B Tally Common output.
The Common (C) contact output for the Mute, Dim, and Talkback tally outputs. When the tallies are all wired
together to ground, this pin ties to a supply voltage. If all the tallies are tied to a supply voltage then this pin is
tied to a ground. When the tallies are isolated (e.g., on a remote panel) and consist of 5 volt LEDs or 6.3 volt/50 to
100 mA lamps, then the tallies are tied to Logic Ground and this pin is jumpered to Logic 5VDC.
Module logic voltage output source that can deliver up to 300 mA of current. The pins are simply paralleled for
convenience.
Module logic ground. Use only on isolated ground devices like a control panel.
PIN NAME/NUMBER
TALKBACK TALLY
(pin 13)
WARNING RELAY
(pins 4 and 5)
ACTIVATE LOGIC INPUTS (+)
(pin 14)
MUTE INPUT (-)
(pin 8)
DIM INPUT (-)
(pin 9)
MUTE TALLY
(pin 11)
DIM TALLY
(pin 12)
MUTE, DIM & T/B TALLY
COMMON
(pin 10)
LOGIC 5VDC
(pins 6 and 7)
LOGIC GROUND
(pins 1, 2, 3)
Control Room Module, Logic — Signal Definitions