User manual

Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations
© Clear-Com Intercom Systems 1999
11
Rev. A
FIGURE 6: KB-211 Block Diagram
EQ/
LIM
Headset
Mic
Talk
Sidetone
Null
Call
Light
Call
Intercom
Volume
Speaker
On/Off
TW Option
Channel
Switch
Ch. A
Speaker
Power
Ch. B
Call Send &
Receive
RMK
Microprocessor
Talk
Headset
Output
Balanced
Program
Input
Speaker
Dip
Program
Mute
Mic
Mute
Common
+30 VDC
Ground
Latch
Disable
Long Line
Program
Level
Call Alert
Tone Level
4-Wire
Input
4-Wire
Output
2-Wire / 4-Wire
Select
Rectifier
16 VAC
Power
Ch. B
Ch. B
Ch. A
Ch. A
4-Wire
Option
Single
Chan.