DC signal in zone contact

[tigers]

I'm planning to connect an energy meter to one of the OP II zones to manage energy loads.
The counter uses a transistor internally to give out the signal, so I must input 9 to 24 DC to get it back whenever there is a "pulse" that I want to count with the OP II.

Can I just send this 9-24 V DC straight in one of the mark board zones or do I have to put a relais in between?
In the latter option, what kind of relais should I use since it will have to work continuously with blinks going to one each second to one each 30 s?

Thanks.

 

[ano]

The Op II zone voltage range is 0 - 5V, so 9 - 24 is obviously too high.  You could adjust it with resistors, but that isn't smart because of grounding problems. A relay would be best for isolation and a reed relay could handle the constant use.

 

[tigers]

Thanks, I imagined something like that. Nice to know I can use up to 5V anyway

 

[pete_c]

Recently just purchased a combo relay module with adjustable debounce time.  Paid $22 for it.  Found another source here and ordered a second one.
 
http://www.wayengineer.com/index.php?main_page=product_info&products_id=2185