Revision C • 1/04
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2-12
2 Installation
digital
UNIVERSAL LOGIC INTERFACE
A block diagram of the Universal Input module
logic interface is shown on page 2-13. Logic out-
puts (shown on the right side of the illustration)
are isolated from the peripheral device by six solid-
state “relays.” The “relay contacts” can switch logic
voltages of up to 60 volts at 350 mA.
Pressing the On button generates a 220 ms con-
tact closure from pin 5 (Start Command Pulse). A
sustained contact closure while On is available on
pin 23 (Start Command Sustained). It stays closed
as long as the module is On. Pressing the Off but-
ton generates a 220 ms closure from pin 4 (Stop
Command Pulse). These three command outputs
are tied together at pin 13 (Command Common).
Module DIP switches DS2-2 (for the A input)
and DS4-2 (for the B input) , set whether a single
pulse is output when the module status changes
(Off to On, or On to Off), or if each additional press
of the On or Off buttons produces another contact
closure. The default setting (switch 2 set to OFF)
is a single contact closure. When DS2-2 or DS4-2
is set to ON, then each additional press of the On
or Off button produces another 220 ms contact
closure.
The remaining outputs; Logic Active/Cue Tally
[pin 15], On Tally [pin 17], and Off Tally [pin 16],
are tied together at Tallies Common [pin 14]. They
present sustained logic outputs for each function.
There are six logic inputs on the left side of the
illustration: Reset, Ready, On, Off, Cough and Talk
to Control Room/Ext. Cue. These inputs are opto-
isolated and current limited so any logic voltage
from +5 to +40 VDC can be used. Reset and Ready
have both high (+) and low (-) input pins so that
either polarity logic can be used. The other inputs
use active low logic (pull to ground) that typically
come from a mic control panel (although On and
Off could be triggered by a peripheral device). To
use these inputs, pin 18 (Activate Logic Inputs)
must be jumpered to the + logic voltage. Typically
MODULE QUICK GUIDES
Pages 2-16 to 2-57
have Quick Guides to con-
figuring logic connections and DIP switch settings.
Each guide covers the audio and logic connector
pinouts and signal descriptions, DIP switch set-
ting definitions, and, for some modules, logic block
diagrams. The Module Quick Guides:
•
Mic Preamp
: pages 2-16 & 2-17
•
Universal Input
: pages 2-18 to 2-23
•
Telco/Codec
: pages 2-24 to 2-27
•
RLS
: pages 2-28 to 2-31
•
Session
: pages 2-32 & 2-33
•
Control Room
: pages 2-34 to 2-38
•
Studio
: pages 2-40 to 2-49
•
Output 1
: pages 2-50 to 2-53
•
Output 2
: pages 2-54 & 2-55
•
Output 3
: pages 2-56 & 2-57
Note:
There are four versions of each Input mod-
ule: full-featured (shown in the Quick Guides); lim-
ited-function modules (without the Utility or Send
bus controls); and full-featured or limited-featured
Net-only modules (which have no input and logic
connectors).
Pages 2-58 to 2-63 show examples of typical
logic connections to the Universal Input module
from a mic remote control panel, a CD player and
a digital delivery system. Pages 2-64 thru 2-66
cover the Net Card and Net-Only modules.
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 Ac-
cessory Panels. Connecting logic ground to a non-
isolated device may result in a ground loop be-
tween the console and the peripheral device.
