Posted 10 September 2012 - 09:03 PM
The 2500T is a sensor. You would connect it to a zone on the Omni. This zone can be on the main board, an expansion module, or an expansion enclosure board. It is not polarity sensitive. The 2500T is only providing contact closure. So you it does not matter how the white/green wires connect up to the + and - leads of the zone.
Your statement of "..will the Omnipro2 be able to control the valve and where would you connect the valve in this case?" is not applicable. The Omni will not be able to control anything on the 2500T because there is nothing to control. All the communications is from the sensor to the Omni panel. When it detects water, the relay will close and provide contact closure. That's why you need to install the resistor across the zone input. When there is no water, normal condition, the Omni will see the 1,000 ohm resistor across the zone input. It will report this as a "secure" condition. When the sensor detects water, it will close the internal relay and thus provide a closed condition, or short, across the zone inputs. The Omni panel will report this as a "not ready" condition.
Sorry, but I do not follow you on the statement: "...allow for the OP2 controller to automate the valve?"