Rainbow Electronics DS1669S - Manual (Page 5)

DS1668, DS1669, DS1669S
081895 5/10
DS1668 DALLASTAT TM BLOCK DIAGRAM Figure 3
INPUT
INTERPRETER
AND CONTROL
SHADOW MEMORY
64 TO 1 MUXER
RHEOSTAT
+
D
UC
DC
-
R L
R H
R W
NOTE: DOTTED LINE CONNECTIONS AND
COMPONENTS ARE INTERNAL TO
THE DS1668 AND DO NOT EXIST ON
THE DS1669.
FLOWCHART: ONE BUTTON OPERATION AND ELECTRICAL CONTROL Figure 4
CONTACT CLOSURE
(D OR UC)
INCREMENT/DECREMENT
1/64TH
YES
NO CONTACT CLOSED
CONTINUOUSLY
> 1 SEC ?
INCREMENT/DECREMENT
ON 100MS INTERVALS
LIMIT REACHED
OR
CONTACT OPEN
1 SEC ?
REVERSE DIRECTION
YES
NO
CONTACT OPEN AND CONTACT CLOSURE TIMING IS 1s
±
10%