Revision C • 1/04
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2-36
2 Installation
digital
CONTROL ROOM MODULE — LOGIC
The 14-pin LOGIC connector has the hot mic
warning output (Warning Relay) for a control
room warning lamp interface, two remote in-
puts; Mute (-) and Dim (-), and various tally
outputs (Mute, Dim and Talkback Tally).
The two Warning Relay outputs short to-
gether when a control room mic is on. They can
be used as two “dry contacts” or one can be jum-
pered to + voltage to present a high logic, or to
ground to present a low logic (on isolated
ground devices, these can come from the Logic
5 VDC or Logic Ground on the con-
nector).
Note:
The warning relay and control room
mute functions are only activated by modules
set as control room microphones (DS1/DS3,
switch 2 is On) and that are assigned to at least
one PGM or UTL bus.
Control Room Module, LOGIC — Simplified Logic Diagram
LOGIC Connector
Logic 5 VDC
Logic 5 VDC
Warning Relay
Warning Relay
Logic Ground
Logic Ground
Logic Ground
Activate Logic Inputs (+)
Talkback Tally
Dim Tally
Mute Tally
Tallies Common
Dim (-)
Mute (-)
(wire insertion end view)
7
6
5
4
3
2
1
14
13
12
11
10
9
8
14
9
8
5
12
4 Warning Relay
Warning Relay
Dim Tally
Logic Ground
Logic Ground
Logic Ground
Tallies Common
Mute Tally
11
13
10
1
2
3
6
7
Int
ernal L
o
gic
Talkback Tally
Logic 5VDC
Logic 5VDC
Mute Input (-)
Dim Input (-)
Activate Logic Inputs (+)
Notes:
Opto-Isolated inputs are current limited and work
with +5 to +40 VDC logic.
Opto-Isolated outputs can sink up to 60 volts or
350 mA max. current flow.
