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6.4 Switched 24V Outputs:
These terminals have 24V DC present when the corresponding zone is set "ON".
These may be used to operate something like an external relay used to turn on a solenoid, a lunch bell, etc.
(NOTE: The maximum current draw per output is about 120 milliamps (internally polyswitch protected), so it is advisable
to run external 24V DC relays instead of trying to drive a 24V DC device directly from these outputs. See Fig 6.2 for an
example of this).
6.5 Closing Contacts:
These contacts "close" when the output zone is set "ON". These can be used to trigger devices such as the A 1741
MP3 Message player.
Fig 6.5 demonstrates an example of how to connect the A 1709 to the A 1741. 24V DC plugpacks (supplied) are used to
power the A 1709 and the A 1741.
The Zone 1 switched output of the timer is then used to trigger a 24V DC bell. As the current draw of the Bell is more
than 120mA a relay board is used to switch an external power supply. The S 4444 24V Relay Board as shown is an
inexpensive and easily installed option designed for this purpose.
In the example shown the Zone Output 2 closing contact of the timer is connected to the Input 1 trigger of the message
player. When Zone 2 is activated by the timer, message 1 of the message player will be played.
12-30V DC
24V DC Plugpack
(such as M 8968C)
24VDC
Input
-
24V DC Plugpack
(such as M 8968C)
www.redbackaudio.com.au
Redback® A 1709 50 Event Weekly Timer
12-30V DC
TRIGGER OPERATION & ALERT/EVAC SETTINGS
SW
ON
Switched
IN
1 Triggers momentary
L
Out
2
Alert/Evac ON
3
Front switches active
4
Not Used
Triggers
Cancel
R
Close
Contacts
to
Line Out
-
+
–
Trigger
24VDC
Interface
Backup
Micro
SD Card
(Firmware
updates)
+ _
+
24V DC Supply
DIP Switch Settings
SW
AUTO ALERT TO EVAC SWITCHOVER TIMER SETTINGS. 0 = OFF. 1 = ON.
OFF
5
0
1 0
1
0 1
0 1
0 1
6
0
0 1
1 0
0
1 1
0 0
Triggers alternate
7
0 0
0
0 1
1 1
1
0 0
Alert/Evac OFF
8
0 0
0 0
0
0 0
0 1
Front switches de-activated
Delay
(Sec.)
Evac
Alert
8
7
6
5
4
3
2
Manufactured in Australia
24V DC Switched Out
By Altronic Distributors Pty. Ltd.
(Outputs limited to 120mA)
4
3
2
_
_
_
+
+
+
4
3
2
1
External
+24V
GND
24V Bell
(eg school bell, lunch bell etc)
Fig 6.5
0 1 0
1 0
1
1 1
0 0 1
1
0 0
1 1
1 1
1 1 1
1 1
1 1
A 1741
1
DIP Switches
MP3 Message Player
1
2
3
4
5
6
7
8
1 2 3 4 5 6 7 8
DIP Switch Settings
SW ON
1
Not Used
2
Station Edit Lockout Enabled
3
Edit Time Lockout Enabled
1
4
Clear Memory Lockout Enabled
5-7
Not Used
A 1709
8
Battery Backup On
50 EVENT TIMER
1
2
3
4
5
6
7
8
_
DIP Switches
+
+24V
GND
N/C1
COM1
N/O1
N/C2
COM2
N/O2
24V Relay Board
(S 4444)
Redback® Proudly Made In Australia 11
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