38
Sleep Mode
Sleep mode is typically used in sub station applications where the visual and audible outputs are
disabled during unmanned periods to reduce the drain on the associated station batteries. Whilst in
sleep mode the logic of the annunciator will continue to react in the normal way including the operation
of common alarm relays and individual channel signal duplicating relays only the drive signals to the
LED’s and audibles are disabled. An externally mounted two- pole switch is required for sleep mode
connected as shown below. Sleep mode is active when the switch is in the closed position.
YC
R
ST
A
M
125 mA/T
F1
+VC
0VOP
0VOP
0VC
+VOP
YB
PB INPUTS
SLEEP
MODE
Connection for Sleep Mode Figure 9
Please note:-
In typical Sub Station applications multiple UC625 Annunciators share a common sleep mode switch.
In these instances RTK recommend that general purpose isolation diodes are added in line to the
remote pushbutton inputs, additional poles are added to the sleep mode switch and inter panel links
should be divided equally as typically shown below.
YC
R
ST
A
M
+VC
0VOP
0VOP
0VC
+VOP
YB
PB INPUTS
R
PB INPUTS
ST
M
A
YC
0VC
0VOP
0VOP
+VOP
YB
+VC
R
PB INPUTS
ST
M
A
YC
0VC
0VOP
0VOP
+VOP
YB
+VC
R
R
PB INPUTS
PB INPUTS
ST
M
A
YC
ST
A
M
YC
0VC
0VC
0VOP
0VOP
+VOP
0VOP
0VOP
+VOP
YB
+VC
YB
+VC
R
R
PB INPUTS
PB INPUTS
YC
ST
ST
M
A
M
A
YC
+VC
+VOP
0VOP
0VOP
0VC
0VC
0VOP
0VOP
+VOP
YB
YB
+VC
UNIT 1
UNIT 2
UNIT 3
UNIT 12
UNIT 13
UNIT xx
UNIT xx
MODE
SLEEP
