10/29/2019
Tech Works CI-Series Systems Planning & Installation Manual Page
25
of
42
Front Controls and Indicators:
Power indicator
: Green, when operating Normally
CI-BUSS, ALERT Active Indicator
: Green, when the
Operator Microphone
is Active
PA-BUSS Input, ALERT Indicator
: Green, when the PA-BUSS Input is Active
Microphone Gain
: 16 Position Rotary Switch, factory set to 8, 3dB/Step, 45dB Range
Talk Level Indicator
: Green, low input level; Green, flashing to Red, Normal Operation, with Local
Microphone, and ALC is active
Notch Filter:
‘LO’ Band Notch Filter trimpot, 250 to 1000Hz‘; HI’ Band Notch Filter trimpot, 750Hz to
3000Hz
PA-BUSS Output:
Level Control trimpot; ON Indicator: Green, when the PA-BUS is ON
Speaker Output:
Level Control trimpot; ON Indicator: Green, when the Speaker Amplifier is ON
NOTE: The Microphone Gain control is for setup; once set, it should not be touched by the User
Rear Connections:
24VDC
– 1.5 A
CI-MSI-22
Tech Works * 1-800-813-1080 * WWW.TECH4PEOPLE.COM
C
A
L
L
-S
W
(
-)
S
P
K
R
(
-)
S
P
K
R
(
+
)
C
A
L
L
-S
W
(
+
)
CI-BUSS
SLAVE
PA-BUSS
OUTPUT
C
O
M
M
O
N
M
IC
(
-)
M
IC
(
+
)
T
A
L
K
CI-BUSS
MASTER
PA-BUSS
INPUT
Operator Call Switch
Procedure Room
Speaker
Procedure Room
Microphone
Speaker Output: 25-Volts Maximum, 10-Watts Maximum;
Two Position Euro-Style Barrier Strip: Speaker
(+/-)
Microphone Input:
Four Position Euro-Style Barrier Strip: Universal Microphone/Line Input (+/-);
Shield/Switch Common; Talk Switch (N.O.)
Selectable Equalization - 3 settings optimized for voice communication
Selectable Phantom Power (22 Volts, Short Circuit Protected)
Configured for a Microphone Level Input: 2000 Ohms Balanced, -75dBm or -60dBm (Selectable)
minimum input (Balanced) for full rated output
Configured for a Line Level Input: 2000 Ohms Balanced, 1000 Ohms Unbalanced, Balanced input
-35dBm to +5dB or -20dBm to +20dB Accommodation range (Selectable), Un-Balanced Input -
30dBm to +10dB or -10dBm to +20dB Accommodation range (Selectable)
Call Switch:
Two Position Euro-Style Barrier Strip: Call Switch (+/-), (N.O.)
Call Switch must Float W.R.T. Common
CI-
BUSS, “Master” Connector
, RJ-45
CI-
BUSS, “Slave” Connector
, RJ-45
PA-BUSS, Input Connector
, RJ-45, Optionally Powered for a CI-MI-1
PA-BUSS, Output Connector
, RJ-45, Always Powered for an AS-1,
23 Volts @ 350MA Maximum
Power Connectors:
(Two) - 3.5mm Barrel Connectors
Chassis: Knurled nut, Earth Ground
The Chassis is connected to Circuit Common through a 1-Meg-Ohm resistor
MICROPHONE
COLLABORATIVE INTERCOM
MICROPHONE / SPEAKER
INTERFACE
POWER
CI-MSI-22
PA-BUSS
OUTPUT
TALK
LEVEL
GAIN
CI-BUSS
ALERT
ACTIVE
ON
PA-BUSS
INPUT
ACTIVE
LO
HI
ON
SPEAKER
NOTCH
LEVEL
LEVEL
