Tech Works ICA-202D Scheda tecnica
Tech Works, Inc., 7430 Eastgate Road, Suite 130, Henderson, NV 89011
Direct Line: 702-846-1080 Toll Free: 1-800-813-1080
Web site www.tech4people.com 6/17
The ICA-202D is the most versatile Audio Intercom
available; yet it is also the easiest to integrate into
your design. With 20 watts of clean audio power at 25-
Volts it can do both the Intercom and the Paging
functions in most facilities. The audio quality of the
ICA-202D is superb. Noise and distortion are very low.
Selectable equalization optimizes voice
communications.
There are separate controls for Audio Level, and
Reach. Once set, Automatic Level Control (ALC)
assures the speaker level remains constant over a
wide dynamic input range. The Remote user may
wander throughout the room and still be heard at a
nearly constant level without any operator
adjustments.
A Privacy Tone, to alert the remote party that
someone is listening, is a control option. If selected
the privacy tone will sound every 20 seconds unless
the PTT is pressed.
The logic interface is PLC compatible. Control options
include Remote Operator Listen Level control from
push buttons or Touch Screen, Privacy Tone, Page,
PTT, Mute, Activate, Shut Off, and Call Tone, which is
automatically routed to the operator speaker. A Line
level output for recording is included. A separate Page
line level output provides audio to paging amplifiers if
required. A Page Pre-Announce Tone (jumper option)
is available.
All configuration settings are factory presets; only the
speaker levels are set in the field. The microphone
sensitivity (Reach) is set with 16 position (3dB/Step)
switches; the Speaker Levels are adjusted with Back
Panel Controls.
ICA-202D
TWO CHANNEL
AUDIO INTERCOM AMPLIFIER
OPERATION AND INSTALLATION MANUAL
Design Information:
Dual Channel Universal Audio Intercom Amplifier
Inputs: R.F. and static electricity protected
Outputs: short circuit protected
Frequency Response: 250 Hz to 10KHz
Remote Speaker Output:
Balanced 20-Watts RMS,Into 25 Volt transformer loads
Operator Speaker Output: 3 Watts into 25 Volt speaker
Distortion at Full Rated Output < 1% T.H.D
Microphone Inputs:
1000 Ohms Balanced
-80dBm minimum input for full rated output
Selectable Equalization optimized for voice
communication
Phantom Power: 23 Volts
Color: Light Gray metal enclosure
Power: 24VDC, 2A Power Supply (sold separately)
Unit is intended to be used with class 2 power source
Weight: 3 lbs.
Dimensions: 8.5” W X 1.75” H X 6” D
Mounting: Desk Mount (DM), Rack Mount (RM), Dual Rack
Mount (RM2), and Wall Mount (WM)
Connections: Euro-Style Pluggable Screw Terminals
BENEFITS
Fully Configurable
Easily Repeatable Settings
Digital Microphone Sensitivity
High Quality Audio
Automatic Level Control
External Reach Digital Stepper
Solid State Switch <3mS
Integral Privacy
Selectable Call Tones
Line Level Recording Output
Page Output
20 Watts Audio Power
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 2 of 32
How to use this Manual
Those wishing to use one of the standard Configuration Templates, should first read the
Overview, and then proceed to the appropriate Configuration Template for your application.
The Setup and Adjustments section should also be read before installation.
For those users who wish to do their own engineering, all sections may be useful. You may also
wish to contact a Tech Works application engineer for assistance.
Table of Contents
Page
Table of Contents 2
List of Illustrations 3
Overview 4
Functional Diagram and Explanation 5
Specifications 6
Mechanical Details 8
Front Panel Controls and Indicators 9
Rear Panel Connections 10
Simplified Block Diagram 12
Main Board Jumper Options 13
Universal Operator Microphone/Line Input 14
Remote EQ, Equalization 15
Paging Line Level Output 15
Monitoring Line Level Output 15
Call Tone Control 16
Level and Reach Setup and Adjustment 17
Paging Control 18
Integrated Systems Solutions 19
Operator “Reach”, Stepped Control 21
Application Templates 23
Mounting Options 31
Accessories 32
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 3 of 32
List of Illustrations:
Page
Functional Diagram 5
Mechanical Drawings 8
Front View 9
Rear View 10, 11, & 19
Simplified Block Diagram 12
PCB Jumper Locations 13
Audio Chain Block Diagram 17
Integrated System Block Diagram 19
Operator Reach Controls, Stepped Buttons 21
Basic Two Station Template 23
Basic Prison Intercom Setup 24
Basic Prison/PLC Interface Applications 25
Multi-Master Prison/PLC Intercom 26
Fiber Optic Cable Remote Audio 27
VOIP Interface to Remote Prison Cells 28
Dukane / Rauland Replacement 29
Intercom with Recording and Paging 30
ICA-202D-WM1 Single Wall Mount 31
ICA-202D-WM2 Dual Wall Mount 31
ICA-202D-RM1 Rack Mount 31
ICA-202D-RM2 Rack Mount 31
Accessories 32
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 4 of 32
Overview:
The ICA-202D is the audio heart of integrated services communications systems.
The ICA-202D is designed with the System Integrator in mind. The logic interface will function
well in a simple two-station setup. However, its strength is a robust logic interface that is ideal
for remote control from an external source such as a PLC, or computer, making integration into
larger systems easy.
The ICA-202D has jumpers and digital switches for application configuration. Once the settings
are determined, they may be set at the Factory, or in the Integrators Shop. Similar installations
use the same settings, so cloning additional ICA-202D's is simple.
Since all critical settings are predetermined, field setup is very easy
The ICA-202D has an External Stepped Control, which allows the Operator to eavesdrop on
conversations not intended for communication, and easily return to "Normal Communications"
settings. An audio limiter assures that even at the most sensitive settings, the Operator speaker
will never be overloaded.
Configuration Templates support common applications. If there is not a template for your
application, give us a call; we will be pleased to assist you to configure the ICA-202D into your
design.
The audio quality of the ICA-202D is superb. Noise and distortion are very low. Selectable
equalization optimizes voice communications. The Automatic Level Control assures optimum
performance, the audio level remains constant over a wide dynamic input range. The user may
wander throughout the room and still be heard at a nearly constant level.
The ICA-202D features true 25-Volt audio outputs, with excellent features for two-way
communications. 20 Watts of reserve output power allows for All-Call and Paging without the
use of auxiliary amplifiers, greatly simplifying systems design and reducing overall cost.
The ICA-202D features an integrated Call Tone and selectable Privacy Tone. These signals are
adjustable, independent of the audio communications settings.
Line level transformer isolated outputs are provided for Monitoring, or Paging. The Monitoring
Output has each side (Jumper Selectable) of the conversation mixed to a single output ideal for
recording. The Paging Output is only present when the Page Switch is active, eliminating the
need for an external relay.
Modular Construction makes the ICA-202D ideal for integrated designs. The unit is small;
mounting is flexible and easy. Power is from a Universal Plug-in DC power adapter or screw
terminals for connection of any regulated 24VDC-2A Power Supply. All I/O is through Euro-Style
connectorized barrier strips. Unit is intended to use with class 2 power source.
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 5 of 32
ICA-202D Functional Diagram
Each channel has its own audio control section, which provides
Automatic Gain Control, Amplifier Muting, and other functions.
The ICA-202D is configured for Remote Station(s) to be a 25-Volt speaker.
The Operator has a separate microphone and speaker.
The Logic Control section provides for complete control of the audio functions.
A muting input is provided to mask station switchover noise.
Call, Privacy, and Paging Pre-announce Tones are included to simplify the
external systems design.
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 6 of 32
Specifications
General:
Dual Channel Universal Audio Intercom Amplifier
Inputs: R.F. and static electricity protected
Outputs: short circuit protected
Frequency Response: 250 Hz to 10 KHz
20-Watts RMS Sine Wave output, 25 Volts (Balanced)
Distortion at full voltage output < 1% T.H.D.
Power Supply Required: 24 Volts DC @ 2.2 Amps for full rated output
Unit is intended to use with class 2 power source
Operator Microphone/Line Universal Input:
2000 Ohms Balanced
As Microphone -70dBm minimum input for full rated output
Selectable Equalization, 3 settings optimized for voice communication
Phantom Power, short circuit protected (23 Volts, Current limited @ 9 MA)
As Line Input, -25dBm to + 20dBm
Remote Microphone (Also used as the Remote Speaker) Input:
1000 Ohms Balanced
-80dBm minimum input for full rated output
Selectable Equalization, 3 settings optimized for voice communication
Operator Speaker Output:
Balanced
25-Volts, Built out with 66 Ohms
Operator Speaker, 2.25-Watts @ 45 Ohms
Or 25-Volt Speaker tapped at ~2 Watts (See page 15)
Remote Speaker Output:
Balanced
25-Volts, 20-Watts (Maximum)
Automatic Level Control:
Operator and Remote
Greater then 40dB Automatic level accommodation
Fast Attack, <10 mS
Feed Forward Control, no ‘Pumping’
Adjustable 'Reach' (Sensitivity)
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 7 of 32
Paging Line Level Output:
600-Ohm, Balanced, Transformer Coupled
Processed by Automatic Level Control, for ~0dBm output
Operator Microphone, Keyed by Page Switch
(Recording) Line Level Output:
600-Ohm, Balanced, Transformer Coupled
Processed by Automatic Level Control, for ~0dBm output
Active Channel, Operator Microphone, and/or Remote Speaker-Microphone
Call Tone:
Uses Operator Speaker
Selectable, Edge or Level Triggered
Latched, of Momentary Control
Adjustable Level
Selectable Tone Character: Constant; Intermittent; Warble
Privacy Alert Tone:
Uses Remote Speaker
Enabled by Switch Input
Two hundred-millisecond tone burst
Privacy Alert Tone on Activation
Periodic Privacy Alert Tone, if Eavesdropping
Adjustable Level
Paging Pre-Announce Alert Tone:
Uses Paging Line Level Output
Selectable: Enable, Disable
Two hundred-millisecond tone burst
Keyed when Paging Switch is activated
Adjustable Level
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 8 of 32
Mechanical and Electrical
1U, Half Rack, 8.60” X 1.75” X 6.00”
Mounting Options: Table-Top; Under Counter; Rack
Approximately 3 lbs
Modular aluminum and steel enclosure
Euro-Style connectorized barrier strips
24 Volts D.C. 24-Watts Maximum, 50 Watts
Unit is intended to use with class 2 power source
LEFT SIDE FRONT RIGHT SIDE
RACK MOUNT
RM-1
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 9 of 32
FRONT PANEL CONTROLS AND INDICATORS
Front Panel Audio Controls:
Operator ‘Reach’ (Remote Microphone Gain)
16 Position Switch, 3dB/step
Sets preamplifier sensitivity for Normal Microphone input level
Remote ‘Reach’ (Operator Microphone Gain)
16 Position Switch, 3dB/step
Sets preamplifier sensitivity for Normal Microphone input level
Front Panel Indicators:
Power
Off, when no power
Green when operating normally
Operator Active
Green when Operator Listening
Operator Reach (Remote Microphone Level)
Off when Microphone not Active
Green when Microphone Active
Flashes Red when Audio is Present (Threshold of Limiting)
Page (From Operator Microphone)
Green when Operator is 'Paging'
Remote Active
Green when Remote Listening
Remote Reach (Operator Microphone Level)
Off when Microphone not Active
Green when Microphone Active
Flashes Red when Audio is Present (Threshold of Limiting)
REMOTE
ACTIVE
DUAL CHANNEL
INTERCOM AMPLIFIER
POWER
ICA-202D
THRES
REACH PAGE ACTIVE REACH
OPERATOR
THRES
06/29/17 ICA-202D OPERATION AND INSTALLATION MANUAL Page 10 of 32
REAR PANEL CONNECTIONS
Logic Control Inputs:
Common sensing for Switches, or PLC
Privacy Tone Enable Sw - Active low, momentary, or sustained
Enables Privacy Tone burst temporarily forcing the Remote Speaker on
The Privacy Tone is initiated when the Intercom is activated
Or when the Intercom is un-muted
Activation from “Push to Talk” or "Page" does not sound the Privacy Tone
The tone burst also sounds every 18-20 seconds if there is continuous listening
Page Sw - Active low (Same functions as PTT)
Causes "Page Out output to carry the Operator Microphone audio signal
This Page Switch Input is diode isolated, so a relay powered +24Volts may also connect
to the same point (The Relay Coil must also have an Anti-Fly Wheeling Diode)
Push to Talk (PTT) Sw - Active Low, momentary or sustained
Forces the Remote speaker on while depressed (Sustained)
Cancels “Call Tone” (Jumper Option)
Activates the Intercom if Inactive
Does not cause the Privacy Tone to be sent
Mute Sw (Highest Priority) – Active Low, momentary, or sustained
Causes both channels to mute
Does not change the state Active or Call Flip-Flops
Sounds Privacy Tone when un-muting (Jumper Option)
Activate Sw - Active Low, momentary, or sustained
Overrides “Shut Off”
Quiescent state, Operator on
Cancels Call Tone (Jumper Option)
Cause Privacy Tone to be sent (Jumper Option)
Shutoff Sw (Lowest Priority) - Active low, momentary, or sustained, see below
Disables both Operator and Remote Speakers
(Overridden by “Activate”, “Push to Talk”, or "Page")
Call Sw - Active low, momentary, or sustained
Causes “Call Tone” to be sent to the Operator speaker
OP MIC (-)
REM SPKR (+)
REM SPKR (-)
OP MIC (+)
OP SPKR (-)
COMMON
OP SPKR (+)
COMMON
PAGE OUT (-)
PAGE OUT (+)
24VDC-2A
P-TONE SW
PTT SW
PAGE SW
ACTIVATE SW
MUTE SW
SHUT OFF SW
CHASSIS
+24VDC
COMMON
ICA-202D
Tech Works * YORBA LINDA * CA * 1-800-813-1080 * WWW.TECH4PEOPLE.COM
CALL SW
OP EXT DN
COMMON
OP EXT UP
COMMON
LINE OUT (+)
LINE OUT (-)
OPERATOR
LEVEL
ACTIVE
ACTIVE
LEVEL
REMOTE
POWER
Indice
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