10
FIGURE 9.
65UV5-1004 “CEX” INTERNAL WIRING - COLOR CODE
SELF-CHECK SHUTTER OPERATION
The 65UV5 self-check shutter mechanism is a powered-open, powered-closed device (no return
spring). The open/closed shutter period is variable and controlled by the scanner’s microprocessor.
Upon initial 24 vdc power application, the shutter will close and open once to verify proper opera-
tion. The shutter will then remain open until a UV flame source is present and the internal flame
relay (RF) is energized.
When the flame relay (RF) is energized, the shutter will be driven closed once every 12 seconds. The
amount of time the shutter will remain closed is determined by the scanner’s microprocessor and is
dependent upon the UV tube’s response. The amount of time closed can vary between 50 ms and 300
ms.
In the event of a self-check failure the flame relay will de-energize.
INDICATION LEDs
The 65UV5 contains a color coded internal LED that indicates flame status and alarm condition per
the following table. View LED through lens on back of housing. Refer to Fig. 12 for LED location.
Table 3:
LED STATUS
CONDITION
FLAME
RELAY (RF)
STATUS
*SHUTTER POSITION
OPEN
CLOSED
GREEN
OFF
NO FLAME DETECTED
OFF
ONCE PER
SECOND
FLASHING
RATE
MARGINAL FLAME SIGNAL
ON
RAPID
FLASHING
RATE
NORMAL FLAME SIGNAL
ON
STEADY ON
HIGH FLAME SIGNAL
ON
RED
OFF
NORMAL
ON
FLASHING
*SELF-CHECK FAILURE
(observe shutter position)
OFF
SHUTTER
FAILURE
UV TUBE
FAILURE
ON
MICROPROCESSOR ERROR
OFF
TERMINAL BLOCK 1
FRONT
(Lens
End)
(Relay Contact Connections)
Note: Connect scanner cable shield to ground lug.
RED
(1)
BLACK
(2)
BLUE
(3)
YELLOW
(4)
GROUND
LUG (Note 1)
TERMINAL BLOCK 2
FRONT
(Lens
End)
(Power Connections)
Product
Label
(5)
WHITE
(6)
BROWN
(7)
GREEN
(8)
ORANGE
