SPECIFIC ATIONS
MICROPHONE PRE-AMP
(Dynamic Headset Input)
Impedance: 1 k
Ω
Level: -55 dBv* nominal, -10 dBv max.
Frequency Response: 250 Hz - 12 kHz,
contoured for intelligibility
Limiter Range: 20 dB
Gain from Headset to Intercom Line: +41 dB
HEADPHONE AMPLIFIER
Load Impedance: 50 - 2,000
Ω
Output Level: > +20 dBv across 600
Ω
Distortion: < 0.2% THD @ 1 kHz
Frequency Response: 200 Hz - 18 kHz, +- 2 dB
INTERCOM LINE DRIVE/RECEIVE
CIRCUITS
Impedance, Output Load: > 10 k
Ω,
200 Hz - 10 kHz
Level,
Line: 200
Ω load
Nominal: -9 dBv
Maximum: +5 dBv before clip
Sidetone Null Capability:
>25 dB, 200 Hz - 10 kHz
Crosstalk, Station-Induced Channel-to Channel:
>60 dB
Noise, S/N Ratio in Listen Channels: >60 dB
SYSTEM SPECIFICATIONS
Intercom Line Length: 5,000 ft. maximum
Intercom Line Length for Crosstalk <-52 dB:
500 ft. maximum
Maximum No. of Stations Per Intercom Line: 100
Frequency Response: 150 Hz - 18 kHz, +- 2 dB
POWER SUPPLY
Output Power: +30 volts DC, +- 1 V
Output Current: 1 Amp
Reset Current: 1 Amp
Hum & Noise: < -1 mV AC RMS
Station Capacity: 30 headset stations or
10 speaker stations
REAR-PANEL CONNECTORS
Intercom: (6) XLR-3M (3 per channel)
Program: (1) XLR-3F
Stage Announce: (1) XLR-3M
Announce Out: SPST terminal block
REAR-PANEL SWITCHES
Power On/Off: 1
Termination On/Off: 2
Mic/Line Select For Program Input: 1
AC POWER REQUIREMENTS
105 - 125/210 - 250 Volts, 50 - 60 Hz, 60 VA
DIMENSIONS
3" H x 8.125" W x 10" D (76 x 206 x 254 mm)
WEIGHT
5.2 lbs (2.3 kg)
All specifications are subject to change without notice.
*
0 dBv is referenced to 0.775 volts RMS
Clear-Com Intercom Systems: 4065 Hollis Street, Emeryville, CA 94608-3505
(510) 496-6666, Fax (510) 496-6699, www.clearcom.com
International Sales: PO Box 302, Walnut Creek, CA 94597, (925) 932-8134, Fax (925) 932-2171
© 1999 Clear-Com Intercom Systems. PL-Pro is a Registered Trademark of Clear-Com.
#CS222/899
REMOTE MIC KILL (RMK)
Pressing the RMK button will turn off the microphone talk circuits of all Clear-
Com beltpacks eliminating annoying noise from the open headset microphones.
SIDETONE
Sidetone control allows the operator to vary the level of his or her own voice
as heard in the headset. The CS-222 provides individual sidetone adjustment for
each channel.
PROGRAM INPUT
The station accepts a balanced, mic- or line-level program signal for monitoring
in the headset and/or mixing the intercom audio on either or both channels.
The front panel provides a local Program Monitor volume control and individual
Program Send level controls. It also provides a Program Send on/off/interrupt
switch for each channel. When interrupt is selected, program is interrupted when
the Talk button is pressed.
POWER SUPPLY AND SUPPLY SYSTEM PROTECTION
The CS-222 provides visual indication of power supply conditions. In the event
of a DC short circuit or current overload, the station’s electronic overload protection
circuit will shut down the DC output to avoid damage. As soon as the fault condi-
tion is removed, the auto-reset circuitry will automatically restore system power –
even under full load conditions. There is no need to disconnect stations
to allow the power supply to reset.
To increase system capacity, one or more power supplies can be connected in
parallel with the CS-222. In such configurations, the main station’s “intelligent”
power-sensing capability lets the system automatically reset all power supplies after
a DC short or AC power loss in the system, no matter how large the system is.
SIMPLE SET-UP
The CS-222 connects to remote stations with standard, two-conductor shielded
mic cable. With the optional rackmount kit, the main station can mount in a
standard 19" equipment rack, requiring only two rack spaces. The CS-222 con-
forms to the highest standards of reliability and performance, providing trouble-free
service over a wide-range of environmental conditions.
CS-222
Two-Channel Main Station
CS-222 BLOCK DIAGRAM
LEVEL
SELECT
12
3
INPUT
PAD
LIMITER
PROGRAM
MONITOR
INTERCOM LINE OUTPUTS
LEVEL
CALL
SEND
CALL
SENSE
PGM
CHANNEL
A
CHANNEL
B
MIC
LINE
TALK
CURRENT
SOURCE
SIDETONE
MIC INPUT
1/2 HEADSET
CONNECTOR
BALANCED
PROGRAM
INPUT
12
3
A
N.C.
C.
N.O.
TALK
ANNC
PROGRAM
ON/OFF
INTERRUPT
CALL
SENSE
LOGIC
CALL/
TALK
LIGHTS
BA
ANNOUNCE
OUT
STAGE
ANNOUNCE
ON
OFF
TERM
LISTEN
LEVEL
CALL
SEND
POWER ENTRY MODULE
WITH PWR ON/OFF SW
CALL
SENSE
TALK
PGM
CURRENT
SOURCE
SIDETONE
ON
OFF
TERM
LISTEN
EARPHONE
A+B LINK
HEADSET
EARPHONE
OUTPUT
1
3
2
1
3
2
A+B
B
A
A
B
B
CONTROL LOGIC
TO CMOS
SWITCHES
ANNOUNCE RELAY
= ANALOG CMOS SWITCH
REGULATED POWER
SUPPLY
REMOTE
MIC KILL
CH A
GREEN
OK
RED
SHORT
32V
CH B
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