6505-110602-4

FIGURE 3. TYPICAL WALL SWITCH OCCUPANCY SENSOR APPLICATION

R1 = 36k

Ω

R7 = 1k

Ω

R2 = 2.7M

Ω

R8 = 910k

Ω

R3 = 36k

Ω

R9 = 7.5k

Ω

R4 = 2.7M

Ω

R9 = 3.6k

Ω

R5 = 36k

Ω

R10 = 1.0M

Ω (variable)

R6 = 240

Ω,1/2W

R11= 51k

Ω

R6 = 1k

Ω,1W

R12 = 10k

Ω

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.

*

*

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.

AC Hot

Remote Control

S = SPST (Mom-Off)

To Load

To P

R

C

Vss

to LS6505-11

S

from MT2

Remote Switch Module

Occupancy Sensor Module

R = 510k

, 1/4W

C = 0.01µF, 10V

AC Hot

FIGURE 4. ADAPTING WALL SWITCH FOR 3-WAY OPERATION

AMP 1

OUT

AMP 1

(-)IN

AMP 2

(-)IN

AMP 1

(+)IN

AMP 2

OUT

TIMER

CONTROL

AC

DEAD TIME

SEL

OPERATION

SEL

TRIAC

OUT

PULSE

MODE

SEL

LED

OUT

AC MAINS

LOAD

SW

TI

MT2

MT1

R6

C11

C6

Z1

D1

R8

C8

R9

C7

R7

C3

R3

C4

R4

1

2

3

5

6

7

8

9

10

11

12

13

14

C1

R1

R5

PIR

SENSOR

R10

R11

R2

C2

LS6505

C5

G

+

-

+

-

+

-

N

P

4

SEE

NOTE

15

16

S1

ON

OFF

AUTO

S1 = SPDT (Mom - Off - Mom)

S1 (MODE B, MODE C)

S1 (MODE A)

S1 = SPDT (On - Off - On)

NOTE:

Open for Mode A

Vss for Mode B

SPDT (On - Off - On)

SPDT (On - On)

WARNING

MODE

SELECT

IN

U1

R12

Q1

C9

C10

OUT

LED