Edwards Signaling Signaling Transformer, Class 2 Low Voltage, Series: 590, 120 V AC Primary, 8/16/24 VAC Secondary, 50/60 Hz Frequency, 1 ph, 30 A Maximum, 3 Taps, Pigtail Connection, Surface Mounting, 2-1/4 in L x 2-1/8 in W x 2-15/16 in H Dimensions