Federal Signal Corporation Atkinson Dynamics AD-26, Installation And Maintenance Manual

Page: 17 / 28

17
GRN WHT BLK
GRN WHT BLK
GRN WHT BLK
AUDIO
CONTROL COMMON
290A4066
PRIMAR
Y "A"
PRIMAR
Y "B"
SECONDAR
Y
3
4
2
1
3
2
2
1K
1
W
AT
T
SEE POWER CONNECTIONS
BLK WHT GRN
* *
BLK WHT GRN
*
BLK WHT GRN
*
RED BLU
1
Power
Primary A
Primary B
Secondary
12
‑18
VDC
AD
‑26C
‑2
AD
‑26C
AD
‑26D
120V 50/60Hz
AD
‑27C
‑2
AD
‑27C
AD
‑27D
22
‑30
VDC
AD
‑56C
‑2
AD
‑56C
AD
‑56D
240V 50/60 Hz
AD
‑57C
‑2
AD
‑57C
AD
‑57D
Operating Principle: •
Primary normally listen to Secondary
.
•
Secondary talks to Primary hands
‑fr
ee, without
having to pr
ess a talk switch.
•
When any Primary talks, Secondary hears. Other primary will hear
.
•
To talk into Primary
, pr
ess talk switch and
speak into speaker/micr
ophone. Release talk
switch to listen.
•
Primary “A” can talk by pr
essing either the talk
switch or exter
nal switch (customer supplied).
NOTES: 1.
Speaker/Micr
ophone
2.
Of
f/On/Speaker V
olume Contr
ol
3.
Pr
ess
‑T
o‑
Talk Switch
4.
Customer
‑Supplied Exter
nal Normally
‑Open
Pr
ess
‑T
o‑
Talk Switch, Momentary (e.g., foot
switch)
10
POWER CONNECTIONS:
BLK
+DC Power
12/24 V models
HOT
120/240 V models
WHT
Common
12/24 V models
Neutral
120/240 V models
GRN
Earth Gr
ound
120/240 V models only