User manual

MR-202/MR-204 Two- and Four-Channel Headset Stations Clear-Com Intercom Systems
Rev. B
8
© Clear-Com Intercom Systems 2000
FIGURE 5: MR-202 Block Diagram
EQ/
LIM
Headset
Mic
Sidetone
Null
Call
Light
Intercom
Volume
TW Option
Channel
Switch
Ch. A
Power
Ch. B
Call Send &
Receive
Headset
Output
Mic
Mute
Common
+30 VDC
Ground
Long Line
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
Tal k
RMK
Microprocessor
Tal k
Latch
Disable
Call