Edwards EST SIGA-MCC1 UIO Signal ModuleThe Edwards EST SIGA MCC1 intelligent addressable single input signal module is the UIO plug in version for Signature Series loops, used to switch a supervised Class B 24 Vdc NAC, 25 or 70 VRMS audio, or firefighter telephone riser to its power source under command of the loop controller. Personality codes select signal power, audio, or telephone with ring tone operation, while electronic addressing and automatic device mapping simplify setup on