Solenoid Valve (SOV) Signal Options

Er, and what does the valve do when both ports are energised?

three-way solenoid valve would work.

A latching solenoid valve can be opened or closed from the same coil.
Pulse current through the coil in one direction for a few milli seconds to open it, pulse current through the coil in the opposite direction for a few milli seconds to close it. Very low power consumption so v good for battery operated equipment.

Del

The best choice for you is a Dual coil Soleniod valve, with first coil energise shall open the soleniod valve ( at this duration second coil shall be in De-energise state) and vice versa.

would we require only one output signal from DCS or seperate signals for both coils. because i have seen a two coil arrangement where there were two seperate signals one for energize to open and one for energize to close.

yes u r right, we require Two DO from dcs, as these 2 colis require seperate wiring.

Is there any option that with only one signal one port is opened and other is closed i.e. enerdized to open and energized to close

a 3-way solenoid valve will work for this kind of application, where a single coil energization can open one port while closing the other.