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ASK-4
®
# 501
AUDIO MONITORING SYSTEM
INSTALLATION AND OPERATING INSTRUCTIONS
INTERCONNECTION DIAGRAM
WIRING REQUIREMENTS
4 Conductor consisting of: 2 Conductor shielded, 20
gauge with 22 gauge drain (microphone connection).
2 Conductor unshielded, 18 gauge (speaker connection)
All in the same jacket.
NOTE: Model AP-1TB Audio Base Station of ASK-4 Kit
#501 is supplied with a 70V talkback output, which is
standard for most audio applications. Should a 600Ω
talkback output be required, please contact our factory
for details regarding instructions for switching over to
600Ω
REAR OF DVR
A B
C
12Vdc
500mA
AUDIO
IN
AUDIO
OUT
12Vdc Power Supply
AD-1 (LE-242)
AUDIO OUT
AUDIO IN
VIDEO OUT
VIDEO IN
AP-1TB
(LE-001)
TLM-W
(LE-007)
Terminal Block identification of Model AP-1TB Audio Base Station
A
Red
12Vdc
B
Black
Audio Input
C
Bare
Ground Mic
SP Green Speaker Positive
G
White Speaker Negative
P
Not used with this application.
Built in Microphone Connection
A
Red
12Vdc
B
Black
Audio Output
C
Bare
Ground Mic
A B C SP G P
70V Transformer
Wire NUTS
Green (Positive)
White (Negative)
