14
14. BLOCK DIAGRAMS

14.1. DA-550F

H
C
CH 1 INPUT
E
H
C
CH 2 INPUT
E
Current Limiter
Short Detector
Protection Circuit
OUTPUT 1
relay
CH 1
OUTPUT
CH 2
OUTPUT
+4 dB
-
10 dB
CH 1 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 1
input level
control
+4 dB
-
10 dB
CH 2 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 2
input level
control
ON
OFF
BRIDGE 1
ON/OFF switch
+
-
BRIDGE 1
OUTPUT
Current Limiter
Short Detector
Protection Circuit
OUTPUT 2
relay
+
-
CH 1 TO ALL
switch
Current Limiter
Short Detector
Protection Circuit
OUTPUT 3
relay
CH 3
OUTPUT
CH 4
OUTPUT
+4 dB
-
10 dB
CH 3 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 3
input level
control
+4 dB
-
10 dB
CH 4 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 4
input level
control
ON
OFF
BRIDGE 2
ON/OFF switch
+
-
BRIDGE 2
OUTPUT
Current Limiter
Short Detector
Protection Circuit
OUTPUT 4
relay
+
-
H
C
CH 3 INPUT
E
H
C
CH 4 INPUT
E

14.2. DA-500FH

H
C
CH 1 INPUT
E
H
C
CH 2 INPUT
E
Current Limiter
Short Detector
Protection Circuit
OUTPUT 1
relay
CH 1
OUTPUT
CH 2
OUTPUT
+4 dB
-
10 dB
CH 1 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 1
input level
control
+4 dB
-
10 dB
CH 2 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 2
input level
control
+
-
Current Limiter
Short Detector
Protection Circuit
OUTPUT 2
relay
+
-
CH 1 TO ALL
switch
Current Limiter
Short Detector
Protection Circuit
OUTPUT 3
relay
CH 3
OUTPUT
CH 4
OUTPUT
+4 dB
-
10 dB
CH 3 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 3
input level
control
+4 dB
-
10 dB
CH 4 sensitivity
selection jumper
(+4 dB/
-
10 dB)
CH 4
input level
control
+
-
Current Limiter
Short Detector
Protection Circuit
OUTPUT 4
relay
+
-
H
C
CH 3 INPUT
E
H
C
CH 4 INPUT
E