P&ID symbology for stantion mounted e-stop? 1

[swartzmech]

I would like to place a mushroom emergency stop button on a stantion, necessarily away from the process equipment. To depict on a P&ID, can I have a double headed arrow on/off the page connected with dashed line to a YS dcs bubble connected to a HS local bubble? This would be shown as independent of the equipment motor. The arrow has the dcs cabinet number inside. Other ways?

 

[JLSeagull]

If it is associated with equipment, consider locating the HS bubble on the P&ID next to the equipment. Otherwise a "bubble in space" works. Use a note to describe the location such as 50-foot from pump, exit gate, etc. Place a reference to the note at the HS bubble.

Some systems like area fire and gas or ESD buttons may justify a separate P&ID with "bubbles in space", tables for the associated equipment, tag numbers, etc.