The Altronix T2428100C is an Open Frame Transformer with 115 VAC Input and 24 or 28 VAC Output. Featuring fused input protection and green grounding lead, this AC transformer powers electronic equipment in security, access control, and surveillance systems. Also known as -Altronix T2428100C Step Down Transformer - 100 VA - 110 V AC Input - 24 V AC, 28-T2428100C Step Down Transformer-Altronix - T2428100C - Altronix T2428100C Step Down Transformer - 100 VA - 110 V