
18
MODE CONFIGURATIONS
LOW Z
70V
OUTPUTS C/D
OUTPUT MODE
SELECT
OUTPUTS A/
B
DUAL A/B MODE 4 /70V
BRIDGE A/B MODE 8 /140V
All outputs in 70V mode
A
B
O
U
T
P
U
T
S
C
D
CLASS 2 WIRING PERMITTED FOR 70V OUTPUTS
200 WATTS/CHANNEL AT 4 OR 70V OUTPUTS
CLASS 3 WIRING REQUIRED FOR 140V OUTPUT
BRIDGE
MODE
Outputs A/B in Bridge Mode
70V line
+
-
+
-
70V line
+
-
140V line
A
B
O
U
T
P
U
T
S
C
D
CLASS 2 WIRING PERMITTED FOR 70V OUTPUTS
200 WATTS/CHANNEL AT 4 OR 70V OUTPUTS
CLASS 3 WIRING REQUIRED FOR 140V OUTPUT
BRIDGE
MODE
Dual-Dual Mono Mode
Total Load = 200 watts
+
-
70V Line
70V Line
35 W
5 W
15 W
25 W
45 W
75 W
+
-
+
-
+
-
+
-
+
-
+
-
+
-
Low Z or
70V Line
Low Z or
70V Line
+
+
-
-
Example of a 70V constant-voltage distribution system:
Use of a 70 volt matching transformer is possible with a 140 volt system by connecting the tap that is rated for 1/4
power (or less) to the desired 70 volt tap. For example, a ceiling loudspeaker with a 70 volt input tapped for 20 watts
is to be used with a 140 volt constant-voltage system. The 140 volt system will need to be connected to the 5 watt
tap in order for the loudspeaker to produce 20 watts. If a 5 watt tap is not available, use the next lower tap.
CAUTION:
Output voltages greater than 120 volts rms are available between the bridged terminals.
Class 3 wiring must be used in accordance with national and local codes to connect the loudspeaker
system.
A
B
O
U
T
P
U
T
S
C
D
CLASS 2 WIRING PERMITTED FOR 70V OUTPUTS
200 WATTS/CHANNEL AT 4 OR 70V OUTPUTS
CLASS 3 WIRING REQUIRED FOR 140V OUTPUT
BRIDGE
MODE
Bridge Mode
+
-
140 V Line
20 watts
3 W
5 W
10 W
20 W
+
-
Dual-Dual Mono Mode
Содержание SA 4200
Страница 19: ...19 SA 4200 Block Diagram ...