TM 1-1520-238-T-6 9–98 9–7. SYSTEM DESCRIPTION (cont) 9–7 PILOT CENTER CIRCUIT BREAKER PANEL LT UTIL SEC CB23 LT PRI CB39 28 VDC PILOT EXT LT / INTR LT PANEL 115 VAC MULTI - CHANNEL DIMMING CONTROLLER 0 - 5 VDC 0 - 5 VDC PILOT AFT CIRCUIT BREAKER PANEL ON OFF 0 - 5  VDC EDGE LT PNL SWITCH PILOT CENTER CIRCUIT BREAKER PANEL PILOT FORWARD CIRCUIT BREAKER PANEL CPG CIRCUIT BREAKER PANEL 1 PRI LT CB14 EMERG BATT UTIL SEC LT CB29 115 VAC 28 VDC 0 - 5 VDC 0 - 5 VDC PILOT MATRIX MODULE CPG INTR LT PANEL CPG CIRCUIT BREAKER PANEL 1 CPG CIRCUIT BREAKER PANEL 2 0 - 5  VDC M69-371 Figure 9–90. Edge-Lighting Circuit Breakers Functional Block Diagram (12) Pilot Station DC Ground Circuit Protection System. The pilot station dc ground circuit protection system (fig. 9–91) saves weight by eliminating large portions of heavy wiring, reduces cost, maintains a constant load voltage due to parallel circuitry, and protects the IR jammer. When power is applied to the IR jammer, current flows from ground through IR JAM PWR circuit breaker (CB63) to the RCCB. Current flows from contact 3 of the RCCB through the coil to contact A1 energizing the RCCB. When the RCCB is energized, the dc bus is connected to the dc load. When an overload condition occurs, the current through the IR JAM PWR circuit breaker (CB63) increases, opening the IR JAM PWR circuit breaker (CB63). When the IR JAM PWR circuit breaker (CB63) is opened, the RCCB deenergizes removing the load from the dc bus. A1 A2 3 5A 28 VDC LOAD DC BUS RCCB A1 A2 3 5A 28 VDC LOAD DC BUS RCCB IR JAM PWR CB63 MISSION RDR JAM DC CB72 CB2 CB1 M69-369 Figure 9–91. Pilot Station DC Ground Circuit Protection System Interface Diagram