Digital music amplifiers, Wire resistance in awg ohms per 1000 ft – El Paso Chile Company DMS 3080-80 User Manual
Page 28
PAGE 28
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
DMS3040/3080/3120
POWER SUPPLY
The Amplifier provides a 24 Volt - 250 mA DC Regulated
Auxiliary Power Supply Output (Reference 8).
CABLE
To connect the Power Supply Output to accessories use a
two conductor wire not less than AWG 18. This minimum
wire gauge is necessary to minimize potential Voltage
Drops in long wire connection applications. For wire resist-
ance refer to Table below.
24 VOLT POWER SUPPLY
REGULATED AUXILIARY POWER SUPPLY
8
24V DC
250 mA
NC
C
NO
+
-
MIC1
G
M2
M1
RVC
VOX RELAY
GROUND
UNMUTE
MUTE 1
MUTE 2
C
MASTER
REMOTE
VOLUME
RVC
3120 Power Supply Output
Fig. 28 - 24 Volt Power Supply Output Diagram
WIRE GAUGE - RESISTANCE TABLE
WIRE
RESISTANCE IN
AWG
OHMS per 1000 Ft.
16
4.016
18
6.385
20
10.15
22
16.14
24
25.67
26
40.81
NOTE:
When calculating the Wire Resistance for each run
using a two conductor Wire the wire Resistance
should be doubled.
EXAMPLE: The Total Resistance of a 1000 Ft. run
of a AWG 24 two conductor Wire is:
25.67 X 2= 51.34 Ohm
VOX RELAY
The Amplifier provides a VOX RELAY (Reference 7) with a
single pole dual throw set of contacts. Figure A at left
shows the contacts when the Relay is not activated. Figure
B shows the contacts when the Relay is activated.
The Relay can be configured to activate when either VOX
1 (M1) or VOX 2 (M2) or both (VOX 1 and VOX 2) are acti-
vated.
The VOX RELAY will remain engaged for as long as the
VOX is active.
SWITCHSET SW206 - The SW206 is defaulted to M1.
When VOX 1 is activated the Relay is switched ON. The
factory setting can be changed to set the Relay to activate
with either VOX 1 - VOX 2 or both.
Both Jumpers (M1 - M2) may be installed.
RELAY CONTACTS RATING
7 AMPERE AT 30 VDC MAXIMUM RATING.
VOX RELAY FUNCTIONS
VOX RELAY
7
24V DC
250 mA
NC
C
NO
+
-
MIC1
G
M2
M1
RVC
VOX RELAY
GROUND
UNMUTE
MUTE 1
MUTE 2
C
MASTER
REMOTE
VOLUME
RVC
3120 Vox relay 01
COM
NC
NO
RL201
VOX RELAY
Q237
D211
M2
M1
MUTE 2 BUSS OFF
X
MUTE 1 BUSS ON
JUMPER
SW206
+
COM
NC
NO
RL201
VOX RELAY
Q237
D211
M2
M1
MUTE 2 BUSS OFF
X
MUTE 1 BUSS ON
JUMPER
SW206
+
VOX NOT ACTIVATED
VOX ACTIVATED
SWITCHSET SW206 DEFAULT SETTING
A
B
Fig. 28A - VOX Relay Output Terminals
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
TM
DIGITAL MUSIC SERIES
DIGITAL MUSIC AMPLIFIERS