Jpds Mechanical Board Layout - GE Mark VIeS System Manual

The JPDS I/O characteristics are as follows:
• Three 28 V power input connectors, JR, JS, JT. The connectors on the power supplies have two connections for positive
and three connections for negative power. In addition, there are three power supply health inputs each with two dry
contact inputs per power source, which become diagnostic signals.
• Three dc outputs, JCR, JCS, and JCT, to control rack CPCI power supplies
• Three outputs JAR, JAS, JAT, to auxiliary power connectors, each with a positive temperature coefficient fuse for current
limiting and containing a common-mode choke for noise suppression
• Access to the internal 28 V bus at the board top and bottom using individual screw terminals on TB1 and TB2. Screw
terminals for R, S, and T are sized to handle a maximum of 35 A continuous current. These terminals can be used to
jumper boards together The screw terminal for ground is sized for 75 A.
• DC-62 connector for PPDA power diagnostic I/O pack. The PPDA monitors JPDS and up to five additional power
distribution boards connected to JPDS with a 50-pin diagnostic ribbon cable.
• P28 power output, P4, diode ORed for the PPDA power diagnostic pack
PDM Power Distribution Modules

JPDS Mechanical Board Layout

Public Information
GEH-6855_Vol_II System Guide 393