Advertisement
3.3 Closing Contacts:
These contacts "close" when the corresponding output zone is set "ON".
(Note: these relay contacts are voltage free and have a rating of 1 amp).
These can be used to trigger devices such as the Redback A 1741 MP3 Message player, which require a closing contact
to activate. Or they could be used to trigger external relays to switch power to external devices.
Fig 3.4 illustrates an example of connecting the S 0080 to the triggers of an A 1741, and also using an S 4455 high cur-
rent relay box to switch an external power supply.
A 24V DC plugpack is used to power the S 0080 and another to power the A 1741, although a single 1A 24V DC supply
would be sufficient to power both.
In the example shown the Zone Output 1 closing contact of the timer is connected to the Input 1 trigger of the A 1741
message player. When Zone1 is activated by the timer, the normally open contact closes and triggers input 1, subsequently
playing message 1 of the message player.
With the addition of the Redback S 4455 10 amp relay box we can switch as external supply to power a high current
drawing device. The S 4455 can be set to 12/24/48V operation (in this case we have set it to 24V) via the on board jump-
er. We then use ouput 4 of the timer to switch the positive side of the 24V supply, to power the S4455 relay box. The 24
V in this case is being piggy backed off the supply from the timer (but a separate power supply could be substituted).
Hence when output 4 is triggered by the timer, power is applied to the S 4455 relay box. The normally open contact on
the S 4455 therefore closes and power is then switched from the external supply to the external device (in this case a
pump, solenoid, etc).
24V DC Plugpack
(such as M 8968B)
S 0080
50 EVENT TIMER
4
Redback® Proudly Made In Australia
12-30V DC
TRIGGER OPERATION & ALERT/EVAC SETTINGS
12-30V DC
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
Output relays
1 amp rating
OUTPUT 1
OUTPUT 2
OUTPUT 3
N/O
COM
N/C
N/O
COM
N/C
N/O
COM
N/C
S 0080
ZONE MODE
Auto Mode
Press Zone buttons to
change Zone Mode
Zone 1
Zone 2
Zone 3
+10
Up
Menu
Down
-
DIP Switches Under
24VDC
Input
24V DC Plugpack
(such as M 8968B)
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 0 1 0 1 0 1
6
0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
Triggers alternate
7
0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
Alert/Evac OFF
8
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Front switches de-activated
Delay
(Sec.)
Evac
Alert
8
7
6
5
4
3
2
OUTPUT 4
N/O
COM
N/C
+
7 Day 24 Hour Timer
DC Input
DC Voltage
Voltage
Selector
S 4455 Relay Box
Manual Mode
Voltage Free Contacts
Zone 4
Enter
+
24VDC
Input
Fig 3.4
A 1741
1
DIP Switches
MP3 Message Player
1
2
3
4
5
6
7
8
1 2 3 4 5 6 7 8
S 4455
10 Amp 12/24/48V
Relay box
Output relays
10 amp rating
+24V
External
GND
24V DC Supply
Pump,
Solenoid,
etc
Advertisement
