Jpds Specification - GE Mark VIeS System Manual

10.8.6 Specifications

JPDS Specification

Item
Three 9-pin connections for 28 V dc Power Supply inputs
Inputs One 50-pin ribbon cable with diagnostic data from upstream boards
One 5-screw terminal block for daisy chaining power distribution boards
Six 6-pin connections for either JPDP or JPDL boards
Three 2-pin connections for CPCI control rack power
Three 2-pin connections, filtered and fused, for auxiliary devices
Outputs
One 50-pin ribbon cable with diagnostic data to downstream boards
One 5-screw terminal block for daisy chaining power distribution boards
One 2-pin connection for 28 V dc power to the PPDA pack
One 62-pin D-shell connection for PPDA power diagnostic pack
Ambient Rating for
-40 to 70ºC (-40 to 158 ºF)
Enclosure Design
16.51 cm high x 17.8 cm wide (6.5 in x 7.0 in)
Board Dimensions
DIN-rail mounting
Mounting
Base mounted steel bracket
10.8.7 Diagnostics
Diagnostic signals are obtained and routed into the PPDA I/O pack as follows:
• An electronic ID identifying the board type, revision, and serial number
• Three analog P28 voltage readings for R, S, and T bus
• Each power supply connector (JR1, JS1, JT1) has provisions for a dry contact indicating power supply status. JPDS
conditions these signals and places them in the feedback signal set.
• Auxiliary supply status feedback from downstream of the fuses provides three feedback signals to PPDA.
JPDS contains test rings for 28 V dc power from the three internal circuits, 28PR, 28PS, and 28PT. Each test ring has a series
10k resistor isolating the ring and a single grounded ring, 28N, for the return path. These can be used to measure the 28 V dc
power voltage using external test equipment.
Note Fuse and dry contacts failure diagnostics will not be generated if InputDiagEnab on the respective dc input (R/S/T) is
set to Disable or the dc input is below the low limit threshold, 5 V.
Also, dry contact diagnostics will not be generated if the user selects NoDryCnt on the input on which a dry contact exists.
394 GEH-6855_Vol_II GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
Public Information
25 A max each
±5 V max
35 A max per screw
13 A max per pin
12.5 A max per pin
1.6 A at 20 °C (derated to 0.8 A at 70 °C)
positive temperature coefficient fuse
±5 V max
35 A max per screw
0.25 A max
±5 V max