5sHX10H6004 RC-IGCT Gate Unit RC-GCT Supply(20V ntemal Supply (without galvanic isolation to power circuit) Anode Circuit Command Signal ( Light) Cathode Fig 10 Block diagram ABB Switzerland Ltd, Semiconductors reserves the right to change specifications without notice. Doc. No. 5SYA1226-03 Jan 02 page 8 of 95SHX 10H6004 ABB Switzerland Ltd, Semiconductors reserves the right to change specifications without notice. Doc. No. 5SYA1226-03 Jan. 02 page 8 of 9 RC-IGCT Logic Monitoring Turn￾Off Circuit Turn￾On Circuit Gate Cathode Internal Supply (without galvanic isolation to power circuit) Supply (20VDC X ) 1 CS Rx Command Signal (Light) Anode Gate Unit RC-GCT Fig. 10 Block diagram