FIGURE 3. TYPICAL WALL SWITCH OCCUPANCY SENSOR APPLICATION
R2
C2
+
C1
-
R1
1
-
C3
+
R3
2 AMP 2
(-)IN
C4
V
DD
NOTE:
Open for Mode A
Vss for Mode B
V
DD
for Mode C
AMP 1
OUT
AMP 1
(-)IN
AMP 1
(+)IN
16
15
R5
C5
V
DD
V
DD
R10
V
DD
SPDT (On - Off - On)
PIR
SENSOR
R4
3
AMP 2
OUT
14
13
WARNING
S1 (MODE A)
ON
R9
R8
C8
V
SS
SEE
NOTE
4
MODE
TIMER
S E L E C T CONTROL
AC
DEAD TIME
SEL
V
DD
AUTO
5
12
OFF
S1 = SPDT (On - Off - On)
N
LOAD
R6
C6
D1
-
6
V
SS
OPERATION
SEL
PULSE
MODE
SEL
11
S1
V
DC
S1 (MODE B, MODE C)
MT2
MT1
AC MAINS
TI
Z1
G
C11
+
C7
7 TRIAC
OUT
R7
10
V
DD
SPDT (On - On)
R12
V
DD
LED
8
V
DD
LED
OUT
9
R11
Q1
S1 = SPDT (Mom - Off - Mom)
IN
P
SW
V
DC
U1
OUT
LS6505
V
DD
R1 = 36kΩ
R2 = 2.7MΩ
R3 = 36kΩ
R4 = 2.7MΩ
R5 = 36kΩ
R6 = 240Ω,1/2W
R6 = 1kΩ,1W
*
*
R7 = 1kΩ
R8 = 910kΩ
R9 = 7.5kΩ
R9 = 3.6kΩ
R10 = 1.0MΩ (variable)
R11= 51kΩ
R12 = 10kΩ
C9
C10
*
*
*
All Resistors 1/4W, all Capacitors 10V unless otherwise
specified. PIR = HEIMANN LHi 958 or 878 (Typical)
C1 = 33µF
C9 = 33µF
C2 = 0.01µF
C10 = 0.1µF
C3 = 33µF
C11 = 0.033µF
C4 = 0.01µF
D1 = 1N4004
C5 = 0.1µF
Z1 = 24V, 1/2W
C6 = 1.5µF, 250V
T1 = Q4008L4 (Typical)
C6 = 1.0µF, 400V
*
T1 = Q5004L4 (Typical)
C7 = 1000µF
U1 = LM78L05 or equivalent
C8 = 0.1µF, 250V
(5V Regulator)
C8 = 0.1µF, 400V
Q1 = MPS8099
= Component change for 220VAC
NOTES: 1.
The R8, R9, C8 network provides a 2.7V Peak-to-Peak AC signal input to Pin 5.
2.
The C7, D1, Z1, C6, R6 components generate the DC Supply Voltage for the LS6505.
3.
The R1, C1, R2, C2, R3, C3, R4, C4, R5, C5 components and the two on-chip Differential Amplifiers set a
nominal gain of 5,500 with bandpass filtering of 0.13Hz to 6Hz.
FIGURE 4. ADAPTING WALL SWITCH FOR 3-WAY OPERATION
Occupancy Sensor Module
AC Hot
S
from MT2
Remote Control
S = SPST (Mom-Off)
R
to LS6505-11
C
Vss
R = 510k , 1 / 4 W
C = 0.01µF, 10V
Remote Switch Module
AC Hot
To P
To Load
When operated in Mode B or Mode
C, the wall switch occupancy sensor
shown in Figure 3 can easily be
adapted to operate with a remote
switch by adding an R-C network to
the occupancy sensor module. R
limits the current from the remote
module into Pin 11 of the LS6505
and C suppresses noise.
6505-110602-4
LSI [ LSI COMPUTER SYSTEMS ]
