4 Stages Interface 24 VAC- 240 VAC. Centapol provides the best price for 4 stages interface for PLC board. 4 Stages InterfaceSKU: 4RLNTB$150.00PriceExcluding GSTQuantity*Add to CartWarranty PolicyCentapol provides 1 year warranty for entirety products, for more details please visit our “Policy Page"