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SEM-7540LPDN_rev010709 

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SEM-7540LPDN 
SEM-7540LPDNP 

Operational Manual

License Plate Capture Series 

License Plate Capture Day & Night Camera 

 

 

 
 
 

 
 

 

 

z

1/3” Sony Exview CCD 

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Sony HQ-1 DSP 

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540 TV Lines 

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0.05 Lux @ F1.0 

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Mechanical IR Cut Filter (ICR) 

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Advanced 8-step manual shutter to obtain clear
 images of moving vehicles license plates 

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Dual Power 12V DC / 24V AC 

 

 
 

 

 
 
 

 

 

M

  Lens Mount

 

This mount is used to install a CS-mount lens. 
CS-adaptor ring is required if using a C mount lens. 

N

  CS Mount Fixing Screw

 

Screw for fixing mount and adjusting back focus if needed. 

O

  Mount Adaptor

 

This adaptor can be attached to either the top or bottom of unit. 

P

 

Auto Iris Lens Connector (4-pin type)

 

The lens connector supplies the auto-iris lens (not supplied) with 
DC power and a video signal or DC control signal. 

 

 

Q

 

 

ME/AES Shutter Control 

(0)

1/50 (60) sec.  (1)    FL: 1/120(100) sec.   

     (2)   1/250 sec. 

(3)  1/500 sec.  

 

 

(4)   1/1000 sec.   (5)  1/2000 sec. 

 

 

(6)   1/4000 sec.   (7)  1/10,000 sec. 

The fixed shutter speed modes can be applied to capturing moving 

objects. Suggestion setting shutter speed is from either 1/250 or 
1/500 according to object moving speed and object distance from 
camera.  

Camera to object moving speed 

Shutter 
Speed 

15~20M
(45~60ft) 

20~35M 
(60~100ft) 

35~60M
(100~180ft) 

1/250 sec.

30~60 Km/hr 50~80 

Km/hr

1/500 sec.

50~80 Km/hr 80~100 

Km/hr

80~100 Km/hr

* Aspherical lenses with the aperture of F1.4 or the larger are 

recommended. 

* The image of the moving object is better to occupy the 80% of 

the picture at least. 

R

 

Auto Iris Mode Selection Switch

 

For switching the output from the auto-iris connector (5). Shutter 
speed is fixed at 1/50 sec. when switch is set to DC or VIDEO 
position. 
DC: To be set when using a non-amp auto-iris lens. 
AES: To be set when using AES (Auto Electronic Shutter). 
Video: To be set when using an auto-iris lens with build-in amp. 

S

 

DC Level Adjustment V.R

   

Used to adjust video output level of DC driven auto iris lens.

T

 

B.L.C. (Back light compensation) Mode Switch

 

When strong light is present behind the object being photographed, 
the object will appear dark. In this case, turn on the BLC. 

 

     

 
 
 
 
 
 
 
 
 
 

 

U

 

D/N (Day & Night) Mode Switch

 

D/N: Day & Night mode turns on at night time. 
Color: Color mode stays on at all times. 

 

 

 

 

 

 

 

PIN NO.

VIDEO

DC 

1

DC  +  12V

CONTROL - 

2

NC

3

VIDEO SIG

DRIVE + 

4

GND

DRIVE - 

FEATURES

Please read the Operational Manual 
before attempting to use this product. 

NOMENCLATURE AND FUNCTION 

DIMENSIONS (Unit: mm)

P = PAL Version 

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