ALARM-24 Series User Manual P/N 821542 Rev-A
23
© 2003 Wohler Technologies Inc. ALL rights reserved
Section 3: Technical Information
ALARM-24D (Digital) Interconnect Block Diagram
A
LARM-24 Di
g
ital Interconnect Block Dia
g
ram
Rear
Panel
MicroComputer
Alarm
Sounder
4-Channel
Alarm Engine
Channels
1-2-3-4
Input
I C
Clear All
Button
Clip Indication (Red LEDs)
Front
Panel
4
3
X
Φ
Reset Button and Phase
Indication (Yellow LED)
Loss Indication (Red LEDs)
Clip
Phase
Loss
X
1
Φ
2
Loss
Phase
Clip
Clip Indication (Red LEDs)
Reset Button and Phase
Indication (Yellow LED)
Loss Indication (Red LEDs)
Chan.1-2
CH.1
CH.2
CH.3
CH.4
Reset
x6
2
DIP Switch
*Bal. Input
(CH.1-2)
*Bal. Input
(CH.3-4)
Digital Input, 4-Channel Level
Meter Engine PCB
(919175)
Alarm Section 1 of 6
Alarm
Relay
BCD Switch
-Alarm Out
-Alarm Reset In
-Unit Configure
RS232
4
3
&
4
1
&
2
Chan.3-4
2
2
2
2
*Also available
with balanced
XLR or unbal-
anced BNC
input connectors
Front
Panel
PCB
(919184)
AES Receiver
Micro Controller PIC PCB
(919183)
Alarm Relay and Sounder PCB
(919180)
03/18/03 Rev-C
8
91
0
2
37
56
4
1
DIP Switch
(Internal)