Connectors on the DK Board - Overall List ------------------------------------------- Initial Rev. 22-Nov-2022 Current Rev. 3-June-2025 The intent of this file is to make a list of all of the connectors on the Disco-Kraken board. First I will just name the connectors on the DK board and then give a short description of the function and signals on each connector. List of the Connectors on the Disco-Kraken Board ------------------------------------------------ Ref Desig Connector Name Connector Type ------ --------------------------------- -------------------- J1 Main Cable Connector 0.1" x 0.1" 16 pin header J2, J3 PMT Analog Signal Connectors harwin_M80-MH313M5-08 J4, J5 Interposer Connectors 2mm x 2mm 40 pin J7 Barnacle Connector 0.1" x 0.1" 14 pin header J8 Emergency Rescue LPC845 SWD Debug 2x5 0.05" micro-Header J10 TomCat Mezzanine Card Connector ERF8-025-07.0-S-DV-K-TR J11 Power Supply Monitor Connector 2mm x 2mm 40 pin J12 DK's Access Connector includes Clks 2mm x 2mm 40 pin J13 SFP for Timing Signal SFP Conn and Cage J14 SFP for Ethernet SFP Conn and Cage J15, J16 USB Camera Connectors USB Board Mount Connector J6 and J9 do not exist Description of each Connector on the Disco-Kraken Board ------------------------------------------------------- Main Cable Connector J1: ------------------------- The J1 Main Cable connector receives +- 48 Volt DC power from the Down Cable and has an Isolated RS-485 connection to the Sub-Junction Box via the Down Cable. This RS-485 bus connection continues in the Up Cable. On the DK Board the J1 Connector is 3M Part No. N3408-5303RB. The cable mount side of this connection can use AMP 102387-3 Housings and either AMP 1-87309-4 or 87046-3 Contacts. The pinout of the J1 Main Cable Connector is given in DK Drawing #81. The +- 48V power connection to J1 is shown in DK Drawing #2. DK Drawing #68 shows the Isolated RS-485 bus connection to the Main Cable connector. PMT Analog Signal Connectors J2 & J3: -------------------------------------- There are 2 of PMT Signal connectors on the DK board - one connector for each hemisphere. Each of these connectors carries the coaxial analog signals from the 8 PMTs in a hemisphere to the Disco-Kraken board. J2 is PMT ADC Channels 1:8 and receives the signals from PMTs in the "A" hemisphere, i.e. the hemisphere with the DK Board. J2 is PMT ADC Channels 9:16 and receives the signals from PMTs in the "B" hemisphere, i.e. the hemisphere with the Muon Detector. Requirements for these connectors include: good low level signal fidelity into the nsec or sub-nsec range, small size, and to facilitate the final assembly of the modules, the ability to plug in 8 coax cables at a time from the side (not the top surface) of the DK Board and to have all captive jack screws. The cable mount side of this connector uses 72 mil diameter coax cable (RG-178 size) that will work with the MMCX connectors that plug into the PMT Bases, e.g. Molex MMCX connector part numbers 734150971 or 734150951 for the straight or 90 degree MMCX cable mount connector. Board Mount Side: Harwin M80-MH313M5-08 Cable Mount Side: Harwin M80-FC305F1-08-0450L The DK Board's Analog Signal Processing connection to these PMT Connectors is shown in DK Drawing #10. Interposer Connectors J4 & J5: ------------------------------- This has become a complicated matter because on the Interposer the designer wants to use a vary small rather delicate connector that is manufactured by a sole source and that has space available for only a few Ground pins. We would rather use some standard type of connector and use ground signal pairs where ever possible (and move the timing signal for which they want nsec or sub-nsec accuracy to be a differential signal). What in theory makes a resolution of this possible is that the cable between the Interposer and the DK Board can have a different type of connector at each end. A requirement is that both Hemispheres of the Module use the same type of Interposer Board and the same type of Cable to run between DK board and the two Interposer boards. To make this work, on the DK Board the Interposer Cable Connector needs to be able to plug in normally or rotated by 180 degrees AND one of the DK's Interposer Connectors needs to be wired backwards compared to the other. An additional requirement to facilitate the final assembly of the modules is that the Interposer Cables plug in from the side (not the top surface) of the DK Board. The pinout of the Interposer connectors on the DK board was set by Adam in his email note of 20-Oct-2023 with a small update in his email note of 2-July-2024. The connectors on the DK board are standard 40 pin 4 wall 2 mm male headers 90 deg with through hole solder tail pins. For example: Molex part number 87833-4020. In addition each of the Interposer Connectors has a PEM Screw Block on each side of it so that mounting screws may be used to clamp the Interposer Cable into the DK board's Interposer connector. These are PEM Part No. SMTRAM3_7_5ET The mechanical aspects of the Interposer Connectors and cables on the DK Board are covered in DK Drawings #69 and #87. The electrical connections to the pins in the DK Brd's Interposer Connectors is given in DK Drawings #51, #52, #72, #73, and #88. Note that the electrical signal vs connector pin number is the same for both Interposer Connectors on the DK Brd. Rather on the DK Brd, the location of a given pin number with in a given Interposer Connectors is different for the "A" and "B" Interposer Connectors. This is shown in detail in DK Drawing #69 and makes it as clear as possible how the DK end of the Interposer Cable needs to be setup. Reference Designator J6 does not exist in the DK design. ---------------------------------------------------------- Barnacle Connector J7: ------------------------ This is a 0.1" x 0.1" 2x7 14 pin 90 Deg Through Hole male shrouded header 3M Part No. N3314-5302RB. The DK board's connections to the J7 Barnacle connector are shown in DK Drawing #43. The generation of the Barnacle Master Reset signal and the 2 Barnacle Control signals is shown in DK Drawing #56. The DK's CPU MMUART_2 that connects to the Barnacle is shown in DK Drawing #60. Emergency Rescue LPC845 SWD Debug Connector J8: ------------------------------------------------ This connector provides the: Reset, ISP, SWD, and JTAG connections to the ARM Cortex Emergency Rescue uProcessor. This connector is a 10 pin 2x5 0.05" micro-header Samtec Part No. TFM-105-02-S-D-A The details of this connection are given in DK Drawing #47. Reference Designator J9 does not exist in the DK design. ---------------------------------------------------------- TomCat Mezzanine Card Connector J10: ------------------------------------- This connector has been defined by Michael and I believe that the correct part number for the DK board is Samtec Part No. ERF8-025-07.0-S-DV-K-TR The pinout of this connector is defined in Michael's TOMCat information on the web. The DK board's connections to the TomCat connector are shown in DK Drawings #80, #89, and #90. Details about the TomCat's power control are shown in DK Drw #85. Power Supply Monitor Connector J11: ------------------------------------ This is a 2mm x 2mm 2x20 40 pin SMD 4 wall shrouded header Molex Part No. 87832-4020 that allows monitoring of both Voltages and Currents on the DK board. The intent of this connector is to allow accurate measurement of all power supply voltages and currents during Final Assembly and Testing of each Disco-Kraken board. A second motivation for this connector is to allow the above measurements without the need to poke around on the board with the probes from a digital voltmeter. The point of making these measurements is both to verify the correct operation of the various power supplies and to verify that the current loads are the expected values. The pinout of the J11 Power Supply Monitor connector is shown in DK Drawing #71. DK's Access Connector J12: --------------------------- This is a 2mm x 2mm 2x20 40 pin SMD 4 wall shrouded header Molex Part No. 87832-4020. The intent of this connector is to provide easy access to any signals that may need during Final Assembly and Testing of the DK boards. The goal is to provide access to these signals without the need to solder little white wires onto the card. The pinout of the J12 Access connector is shown in DK Drawing #71. SFP for Timing Signal J13: --------------------------- This is a standard SFP socket and cage for the optical transceiver that provides the Timing Reference Signals and Clock Latency measurement for the DK board. Its pinout is shown in DK Drawing #42. Details about control of the Tx Disable signal to this SFP connector are shown in DK Drawing #84. SFP for Ethernet J14: ---------------------- This is a standard SFP socket and cage for the optical transceiver that provides a 1 GBit/sec Optical Ethernet connection for the DK board. Its pinout is shown in DK Drawing #66. Details about control of the Tx Disable signal to this SFP connector are shown in DK Drawing #84. USB Camera Connector J15 and J16: ---------------------------------- These are type "A" USB connectors for the Module's two USB Cameras. They are Right-Angle Through Hole USB connectors Molex Part No. 482040001. J15 is Camera "A" and J16 is Camera "B". An overall view of this dual USB connection and the power control for the Cameras is given in DK Drawing #77. The Reset signal to this USB system is generated in Drawing #56. Details of the USB Phy chip, the dual port USB Hub, and the dual USB Power Switch are given in DK Drawings #17, #18, #78, and #79.