What are the differences between the E-opto16 and dry contact points on X20 and X60 units?
The dry contact inputs on the X20 and X60 units can be switched from opto-isolated mode to non-opto isolated mode, where the E-opto16 inputs are all shipped as opto isolated and cannot be configured as non-opto isolated. Because of this, the E-opto16 inputs do require an input voltage as the module will not supply this voltage. When configuring the E-opto16 in the web interface of the securityProbe 5E and the dry contact input is set to the “Normal State” when voltage is applied, then the status will go to a “Critical” condition if nothing is connected, or there is no input signal to the dry contact. (no voltage applied). If the dry contact input is set to the “Normal State” when no voltage is applied, then the status will go into the “Critical” state when something is connected, or a signal is applied (or voltage applied).