Connect light depedent sensor to PLC

leolow

Guest

L

• May 25, 2005

• #1

how to connect light depedent sensor to PLC ??

 

Amr Hassan

Member

A

Join Date

May 2005

Posts

340

• May 25, 2005

• #2

what do u mean

 

mgvol

Member

M

Join Date

Dec 2004

Location

Knoxville, TN

Posts

746

• May 25, 2005

• #3

Are you talking about something like a turbidity switch? It would depend on the votage output of the switch; if it matches your input module's voltage range (i.e. 10-30 vdc or 90 - 140 vac), then yes. If it is a turbidity switch, all of the ones I've come across required a special conroller (relay) that processed the output signal from the sensor and switched a set of relay contacts.

 

panic mode

Member

Join Date

May 2003

Location

Toronto, Canada

Posts

1,963

• May 25, 2005

• #4

define light-dependant

 

randylud

Member

R

Join Date

Oct 2002

Location

Greensboro,NC

Posts

933

• May 25, 2005

• #5

LeoLow, what is it about your other threads you have not learned yet. Slow down and give people a chance to help you and also, provide more information than the bits you have posted so far. Multiple threads about the same or similar topic is not a good idea either!

 

Unregistered

Guest

OP

U

• May 25, 2005

• #6

1. Hold light switch against PLC
2. Apply duct tape to switch and PLC
3. switch is now connected to PLC

 

danpreps

Member

D

Join Date

May 2005

Location

Ciudad de Cebu

Posts

19

• May 26, 2005

• #7

Leolow, i think you are talking about light activated sensor. the best thing you do is try to measure the output of the device you are using then if voltage range is thesame to the PLC input voltage range, then you can connect directly to PLC. If it is below or beyond the PLC input voltage range then better use interface relay.

hope this will answer your query.

 

danpreps

Member

D

Join Date

May 2005

Location

Ciudad de Cebu

Posts

19

• May 26, 2005

• #8

Leolow, i think you are talking about light activated sensor. the best thing you do is try to measure the output of the device you are using then if voltage range is thesame to the PLC input voltage range, then you can connect directly to PLC. If it is below or beyond the PLC input voltage range then better use interface relay.

hope this will answer your query.

 

gerald

Member

G

Join Date

May 2005

Posts

5

• May 29, 2005

• #9

Leolow,

I agree with Danpreps. I think your talking about light activated sensor. Now, you did not not mention what kind of PLC processor you are using. Anyway, just like any sensor it should go to the input module of your PLC. Just make it sure the ouptut of your light activated sensor is more or less the same with the other input signals of your PLC ( ex. 24 VDC, PNP ). Otherwise, you can use an interface relay.