GS20 System is powered from Overhead contact line by pole-mounted substations or some other alternative power source. The system itself includes HMI workstation, SCADA subsystem, distribution cabinets, connection cabinets, electric heaters and electrical cables for. DISTRIBUTION BOX WIV TEMPORARY ELECTRICAL INSTALLATION Our fully pluggable surface-mounted installation distribution boxes are ideal for trade fairs, events and similar occasions where View and Download Automation Direct DURApulse GS20 Series quick start manual online. DURApulse GS20. cover, bushings, and screws. Conduit box dimensions are shown be ts can be ordered separately. These kits bolt onto the bottom of the applicable GS20 drive to provide a convenient connection point for conduit entry, allowing the GS20 to acheive a NEMA 1/UL type 1 environmental protection rating;. DURApulse GS20 series conduit box, NEMA 1. For use with GS20 series C frame AC drives. In Cart: Please login to ask a product question. The GS20 series, Inovance's latest high-protection I/O modules, boasts an IP67 rating, allowing on-site installation without a cabinet.