6511-102402-4

AMP 1

OUT

AMP 1

(-)IN

AMP 2

(-)IN

AMP 1

(+)IN

AMP 2

OUT

5V REG

OUT

C3

R3

C4

R4

1

2

3

12

13

14

R8

C9

R1

C1

PIR

SENSOR 1

R2

C2

LS6511

R7

C8

R10

R9

C7

R6

C6

R5

C5

PIR

SENSOR 2

+

-

+

-

+

-

+

-

5V

R1 = 1k

Ω

R6 = 36k

Ω

C1 = 100µF

C6 = 33µF

R2 = 2.7M

Ω

R7 = 36k

Ω

C2 = 0.01µF

C7 = 0.01µF

R3 = 36k

Ω

R8 = 36k

Ω

C3 = 33µF

C8 = 0.1µF

R4 = 2.7M

Ω

R9 = 5.6M

Ω

C4 = 0.01µF

C9 = 0.1µF

R5 = 36k

Ω

R10 = 2.4M

Ω

C5 = 33µF

PIRs = HEIMANN LHi 954, 958, 978, 874 or 878 (Typical)

All Resistors 1/4 W. All Capacitors 10V.

NOTES: 1) A pair of PIR Sensors may be used in applications where a wider optical field of view is needed.

2) External 5V Regulator drives the LS6511 and PIR sensor.

FIGURE 4. DIFFERENTIAL INTERFACE TO PIR SENSOR PAIR

AMP

AMP

COMP

COMP

DIFF AMP 2

OUTPUT

DIFF AMP 2

INPUT (-)

DIFF AMP 1

OUTPUT

DIFF AMP 1

INPUT (-)

DIFF AMP 1

INPUT (+)

SHUNT

REGULATOR

PROGRAMMABLE

RETRIGGERABLE

ONE-SHOT

OUTPUT

DURATION

TIMER

WINDOW

TIMER

5 V REGULATOR

OUTPUT

CONCURRENT PULSE/

DUAL PULSE RC

LED/RELAY

OUTPUT

DRIVER

M

U

X

FIGURE 5. LS6511 BLOCK DIAGRAM

WINDOW

COMPARATOR

DIGITAL

FILTER

DIGITAL

FILTER

PROGRAMMABLE

RETRIGGERABLE

ONE-SHOT

LED/RELAY

OUTPUT

DRIVER

DIGITAL FILTER RC

MODE

SELECT

DURATION

TIMER RC

UNDERVOLTAGE

DETECTOR

3

2

1

14

13

11

10

12

6

7

9

8

4

-

+

-

+

+

-

+

-

5