The Dual Relay Modules (R2ML/H Series) have been designed to provide flexibile and quick response to
emergency conditions. The R2ML/H Series allows independent control of two form C contacts for a variety of
normally open and normally closed contact applications such as fan operation, elevator recall, door closure, and
auxiliary notification.
Each R2ML/H Series module provides independent control of two Form C contacts while utilizing one SLC (Signaling
Line Circuit) address. The R2ML/H Series modules have a highly configurable programming algorithm that allows the
user to set up groups of devices (zoning) for simultaneous operation of multiple R2ML/H modules. Each module has
16 priority states that are programmed. The operating parameters are maintained by the module and do not require
individual communication with the control panel during the emergency condition to operate. The control panel
broadcasts the control command on the SLC loop and the R2ML/H Series modules do the rest based on their custom
configuration. Since mechanically latching relays are used within the R2ML/H Series modules, a separate 24VDC
power source is not required.