Manufacture and Installation of the Serial Command Link Cables ---------------------------------------------------------------- Original Rev. 19-MAY-2000 Current Rev. 6-JULY-2000 The Hub-End of the Serial Command Link connects with the 70 or 80 Geographic Sections in the D-Zero DAQ system via Serial Command Link Cables. Each SCL Cable is made up of two parts: the Serial Coax Cable that carries information from the SCL Hub-End to the Geographic Section and the flat twisted pair Status Cable that bring status information from the Geographic Section back to the SCL Hub-End. The SCL Hub-End is located in the top of rack M124 This following 4 sections make up the rest of this document: Description of the Serial Coax Cables Description of the Twist & Flat Status Cables Labeling of the cables Installation and routing of the cables Parts Available for Cable Production SCL Serial Coax Cables and Connectors ------------------------------------- Each Serial Coax Cable is made up of two parts: a short 5 ft section of thin LMR-100 cable and then a long section of the thicker LMR-200 cable. The 5ft LMR-100 cables are used for the runs from the SCL Hub-End Fanout cards in the top VIPA crate in M124 to the patch panel on top of M124. The length of the LMR-200 section depends on where the Serial Coax Cable is running. All runs to the 1st and 2nd floor MCH are one known fixed length and all runs to the 3rd floor MCH are a different known fixed length. There are also special runs out to the platform, to the L2 Test Stand, and to the Calorimeter 5k test setup. Of these special runs the only ones that we know enough about to manufacture and install at this time are the runs to the platform. The following is a sketch of what each Serial Coax Cable looks like. FanOut Module Patch Front Panel Panel | Front | Back | | | 5 ft | | LMR-100 | +--+ +---+ +---+ +--+--+ | | | |------------------| | | | | | | | |------------------| | | | | +--+ +---+ +---+ +--+--+ | | | MCX SMA | | SMA | Johnson PE4036 PE9071 133-3403-001 +---+ | |------------------------------\ | |------------------------------\\ Geographic Section +---+ || LMR-200 || +--------------- SMA various || | Times uWave lengths +---+ +--+ 3190-612 typically | | | | SCL 44, 64, or 160 | | | | Receiver plugs feet +---+ +--+ into | Patch SMB +--------------- Panel PE4522 List of Serial Coax Cables to manufacture at this time: qty 85 LMR-100 cables 5 ft long with a MCX connector on one end and a SMA connector on the other end. These run from the Fanout cards (MCX end) to the Patch Panel (SMA end). Qty 85 of this item includes 10 spares. qty 36 LMR-200 cables 44 ft each with a SMA connector on one end and a SMB connector on the other end. These run from the Patch Panel (SMA end) to SCL Receivers on the 1st and 2nd floor MCH (SMB end). Qty 36 of this item includes 5 spares. qty 37 LMR-200 cables 64 ft each with a SMA connector on one end and a SMB connector on the other end. These run from the Patch Panel (SMA end) to SCL Receivers on the 3rd floor MCH (SMB end). Qty 37 of this item includes 5 spares. qty 12 LMR-200 cables ** ABOUT 160 ft long ** with a SMA connector on one end and a SMB connector on the other end. These run from the Patch Panel (SMA end) to SCL Receivers on the Platform (SMB end). Qty 12 of this item includes 3 spares. All parts left over from the manufacture of these cables need to be saved because it is known that a few special cables will be needed in the future. Status Cables and Connectors ---------------------------- The Twist & Flat Status Cables run from a SCL Receiver in a Geographic Section back to the SCL Hub-End where they connect to the Status Concentrator transition boards in the back of the top VIPA crate in rack M124. These cables are made with 13 pair 25 mil pitch Twist & Flat cable. The connector used at the SCL Hub-End is different than the connector used at the SCL Receiver end. The SCL Hub-End uses a Thomas & Betts 311-026302 connector and the SCL Receiver end at the Geographic Sections uses a Robinson Nugent P25E-026-S-TG connector. List of Status Cables to manufacture at this time: qty 35 length 49 ft These run to Geographic Sections on the 1st and 2nd floor MCH. Qty 35 of this item includes 4 spares. qty 24 length 66 ft These run to Geographic Sections on the 3rd floor MCH. qty 14 length 69 ft These run to Geographic Sections on the 3rd floor MCH. These 13 included 5 spares to the 3rd floor. Labeling of these Cables ------------------------ In addition to any other information of the labels of these cables it would be nice to mark them with their Geographic Section Number. The official list of the Geographic Sections in Run II D-Zero is located at: http://niuhep.physics.niu.edu/~fortner/d0/ALGO/UNPACK/ Look under the heading called Run Configuration at the item called Data Crate Map. The column in this table labeled Crate Number is the same as the Geographic Section Number. Most people will want to think of this number in hex. This table shows, for each Geographic Section, the name of the system and the rack and crate that it is located in. The current version of this document on the web, which is dated 2/10/2000 is known to have errors in it. Do NOT use this version of this document for labeling or routing cables. The errors are now understood and this document will soon be brought up to date soon. The spare cables in the lists above could be labeled: Spare SCL Cable 1 through N. Note that the size of the labels used on these cables at their SCL Hub-End is going to be a issue. There are many many cables connecting with the SCL Hub-End VIPA crate so these labels need to be physically small. This is especially true of the LMR-100 Serial Coax Cables and the Status Cables. Installation of these Cables ---------------------------- The path that these cables take to get to the 2nd and 3rd floor MCH is through holes in the floor. The 1st to 2nd floor hole is above the center aisle way just by the air conditioner. This hole needs a plastic liner (pvc pipe or something) installed to protect the cables and provide protection against water leaking from the 2nd floor to the 1st floor. Some kind of light cable tray or other form of support needs to be installed above M124 - M125 to guide the cable up from M124 to this hole in the 1st floor ceiling. One the cables reach the 2nd floor some of them can run to the Geographic Sections on the 2nd floor and some of the cables continue up to the 3rd floor. The cables that continue up to the 3rd floor need to have a supported path up to the hole in the 2nd floor ceiling. In Run I similar cables were threaded through the M224 rack which may or may not be practice in Run II depending upon what is going to be in M224 for this run. I think that the cables need support - protection as they make the vertical run up to the hole in the 2nd floor ceiling. I'm particularly concerned about the light 25 mil pitch Status Cables. The SCL cables that run from the Hub-End to the platform will need to find a route under the 1st floor floor to the bridge. I will take care of installing the 5ft long LMR-100 Serial Coax Cables. Just enough length of the LMR-200 Serial Coax Cables should be left at the SCL Hub-End so that they can reach any location on the back of the Patch Panel above M124. Just enough length of the Status Cables should be left at the Hub-End so that they can be routed in through the cable clamps on the top of M124 and comfortably reach any location on the back of the top VIPA crate in M124. Parts Available for Cable Production ------------------------------------ As of 19-MAY-2000 the following parts are at D-Zero Assembly Building: 500 ft of LMR-100 cable qty 97 of Johnson 133-3403-001 MCX straight connector for the LMR-100 cable. Fanout Module end of these cables. qty 80 of PE4036 SMA straight connector for the LMR-100 cable. Patch Panel end of these cables. qty 80 of PE9071 SMA bulk head feed through for the Patch Panel qty 160 of Times Microwave 3190-612 SMA straight connector for LMR-200 cable. Patch Panel end of these cables. qty 80 of PE4522 SMB rt angle connector for the LMR-200 cable. SCL Receiver end of these cables. qty 1 drilled and labeled 19" rack panel for the Patch Panel. So on 19-MAY-200 we have the parts available to make 80 (out of the required 85) LMR-100 5ft long MCX to SMA cables, and the parts to assemble the Patch Panel. We do not have any of the LMR-200 cable but it is expected with in a week and we do have all the connectors required for the LMR-200 cable. We do not have any of the twist & flat cable for the Status Cables. It is not expected to arrive at Fermi before the last week of June and very likely will not get here until a couple of weeks after that.. The connectors for the Status Cables are on site but not at D-Zero.