Rack Cabling Reference for the HP NetServer LXr 8000 HP Part Number D6021-90005 Printed in October 1998
Notice The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
Contents 1 About This Cabling Reference.................................................................... 1 Introduction ................................................................................................... 1 Before You Use This Reference ................................................................ 1 Purpose of This Document ........................................................................ 1 Building an HP NetServer Rack.............................................................
Contents Cable Routing: Creating the Cable Management Loop ................................ 37 Power Up the Components in the Rack ....................................................... 38 Power Up Sequence................................................................................ 38 Power Down Considerations.................................................................... 39 3 Cabling Reference Information .................................................................
1 About This Cabling Reference Introduction Before You Use This Reference This cabling reference assumes that you have the rack assembly process completed, have mounted the HP NetServer LXr 8000, and are ready to cable the components in the rack enclosure. For instructions on how to install the HP NetServer LXr 8000 in a rack, consult the installation guide or user guide shipped with your unit.
Chapter 1 About This Cabling Reference Building an HP NetServer Rack Suggested Method for Building an HP NetServer Rack Installation 1.
Chapter 1 3. About This Cabling Reference Prepare Rack Enclosures for Assembly WARNING A tip-over hazard exists. Rack enclosures are shipped upright and are top-heavy. Never move enclosures without adequate equipment and assistance. Use caution to prevent rack from falling over and causing potential damage or injury. If you receive pre-configured units, follow assembly instructions from the supplying organization first, if you have them. Otherwise, continue with this set of instructions.
Chapter 1 About This Cabling Reference WARNING When equipment is mounted on sliding rails, a tip-over hazard exists. Always take the precautions listed below: Extend or bolt on the anti-tip foot for each rack before mounting equipment on slides. Never extend more than one piece of equipment on slides at time. Reduce weight by removing power supplies and hard disk packs from servers. Always use the rack mounting handles that are shipped on rack optimized units as shown in accompanying instructions. 4.
Chapter 1 NOTE About This Cabling Reference HP Rack System product numbers J1487B, J1487B option AXH, and J1488A require that enclosures to be tied together before any components are mounted inside them. To avoid problems, if these rack versions are to be tied together, do so before installing slide members, rails, shelves, units, or other hardware. Otherwise, you may have to remove components from the rack to gain access to the tie-bolt locations. 2.
Chapter 1 5. About This Cabling Reference Mount Component in the Rack Plan Component Locations Use the original ordering information to locate where each component goes in the rack. If the original ordering information is not available, use HP rack configuration tools to plan the location of each component. You can also use the HP NetServer rack configuration tools (for instance, HP Rack Assistant) to make ordering easier and to automatically check that orders are complete.
Chapter 1 About This Cabling Reference 4. Be sure to locate and place rack nuts along the front outside face of the vertical column before placing each component on its rails or base. The pre-positioning of rack nuts allows the front of the component to be secured to the front of the rack. (Some units use threaded inserts or bar nuts, and require no rack nuts to secure the unit to the rack.) 5. Mount each unit on its accompanying rails, brackets, or slides. CAUTION Tip-over hazard exists.
Chapter 1 About This Cabling Reference • Attach data cables to the server. Mark the ends of data cables with colored tie-wraps and labels that come along with each server. This simplifies attaching cables later in the procedure. • Create a cable management loop by providing sufficient cable length to allow servers to be extended from the rack for maintenance. • Attach data cables to their respective components. Attach power cables • Connect each component to a Power Distribution Unit (PDU) or Units.
Chapter 1 About This Cabling Reference Prevent Electric Shock WARNING Ensure site electrical circuits have reliable earth grounding. Never operate products in any rack enclosure with the ground connector disconnected. Although leakage current from any one device may be minimal, cumulative leakage current of equipment mounted in a rack may exceed 5mA, and could reach 15mA. This level of current can be dangerous, unless a reliable earth ground is in place.
2 Connecting and Routing Cables to the HP NetServer LXr 8000 Introduction Overview of Cabling Steps This chapter includes information on cabling the server and other components in a rack, including: • site preparation • cabling preparation for data and power • attach data cables • attach power cables • cable routing and management • power on the equipment in the rack The HP NetServer LXr 8000 This cabling reference is for the rack optimized HP NetServer LXr 8000 shown in Figure 2-1.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-1. The Rack Optimized HP NetServer LXr 8000 Site Preparation You may want to copy and use the site preparation checklist in this section with a representative of the organization installing the rack. Doing so before you begin may reveal actions you can take to support your success.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Site Preparation Checklist Table 2-1.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Table 2-1. Site Preparation Checklist (Continued) Environment and Space Requirements Must meet OSHA, local code, and HP specifications for safety and supportability (3 feet minimum access in front and rear of electrical cabinets) Side access of 24 inches improves cable routing and management 24 hour air conditioning (68 - 72 deg. F; 20 - 22 deg.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Site Preparation: Circuit Breakers When you connect the HP NetServer LXr 8000 to an AC power source, the server temporarily draws a large "inrush current." This occurs even when the system is in standby mode. Inrush current is much greater than the server’s normal operating needs. Generally, your external AC power source can handle the inrush current.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Cabling Preparation for the HP NetServer LXr 8000 Assess How Components Will Be Connected to the Server You may find the following steps to be helpful before you begin cabling. • Review the layout of the rack installation generated with HP’s rack configuration tools. (See Step 2 in Chapter 1 for more information.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Placement of PDU To determine where the PDU mounts, eliminate positions directly behind equipment listed in Table 2-2. (PDUs conflict with these units when mounted in the same space). Then decide the most convenient location. The PDU can be mounted vertically using the non-EIA mounting holes on the outer edges of the vertical columns (except in the case of the LXr Pro8, where it mechanically conflicts).
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-2. Three PDU Configurations The 208-240 VAC, wide-voltage-range-rated, switchless version of the Power Distribution Unit (PDU) can be mounted in several configurations with the LXr 8000. One of these configurations is shown in Figure 2-3 below. Others are listed in Table 3-2 and discussed in Chapter 3.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-3.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Mounting the PDU Horizontally Installation Steps To mount a PDU horizontally, follow these steps: 1. Determine the exact location of the PDU. A PDU is not recommended behind certain HP units, as shown in Table 2-2. (Horizontally mounted PDUs conflict with mechanical access if mounted behind these units.) A PDU can be located in an empty EIA unit and a filler panel put in the corresponding space in the rack front.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 CAUTION Orient the star-washer on the hex nut toward the painted surface of the rack. Ensure the screw and nut are tightened sufficiently to cause the star washers to pierce the paint and bring the lock washer teeth in contact with metal. This action ensures that the rack ground connection to the PDU is made.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-5. Mounting the PDU Vertically 2. Use the row of mounting holes nearest the outside edge of the vertical column. Use the hex nut and screw supplied with the PDU. Hold the nut behind the column and insert the screw through the top mounting bracket of the PDU, and through the face of the vertical column. Start it in the nut. See Figure 2-5. 3.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Attach Data Cables Plan Data Connections Plan where data connections are to be made and locate cables to be used. There are hook-and-loop cable straps and also colored pairs of cable ties and labels in each server package. You can use the hook-and-loop cable ties to secure cables. Attach data cables to the boards and ports of the server. Use the colored plastic cable ties to identify both ends of the cable.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-6. Overview of Data Cabling of the HP NetServer LXr 8000 NOTE Figure 2-6 shows an HP Console Switch, which is not necessary for configuring the system, but is shown for informational purposes. Attach Data Cables to the Server 1. Locate SCSI connections, label both ends of the SCSI cables, and connect one end of each one to the server. See Figure 2-6.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 SCSI Cable Lengths and Distances between the Server and Storage SCSI cables (2.5 meter, 56-inch, and not extendible) limit the distance between a storage unit and its associated server. Guidelines used by rack configuration tools in generating rack layouts take this distance limitation into account. NOTE Be sure to leave sufficient data cable length to allow for a cable management loop.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 4. For the sake of easy access to the rear of each component, route the associated power cords within the same space (the same set of EIA Units) where the component is located. Excess cord can be handled by coiling and tie wrapping unneeded length, and hanging it in the space at the side of the component it connects. When doing so, be sure you allow sufficient slack for access.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-7.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Power Considerations for the HP NetServer LXr 8000 The HP NetServer LXr 8000 can be configured in either of two voltages: 208, or 230/240 VAC. Power supply (UPS) and distribution (PDU) components are available to support these configurations. Power considerations for the HP NetServer LXr 8000 include: ◊ available in 208 VAC model for the U. S.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Table 2-3. 200/208 VAC Components Component (Note 1) Model Power (VA) Power (W) Current (A) Note 2 E7671A or E7672A N/A N/A maximu m 16 D6021A (single 400 MHz processor, 512K Cache) D6022A (single 400 MHz processor, 1 MB Cache) 1,121 1,077 5.6 HP NetServer Rack Storage/8 D4902A 211 209 1.1 HP Console Switch J1497A 42 29 0.2 208 VAC PDU HP NetServer LXr 8000 Note 1 More ratings are listed in Table 3-4.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-8.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 230/240V PDU Rack Power Configurations Configurations for the 230/240 VAC, PDU options are shown in the text below, Table 2-4, and Figure 2-9. 230/240 VAC Power Configuration In a country with a 230/240 VAC power system, the high-voltage (230/240 V) PDU model E7671A is required.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Description of the Recommended 230/240 VAC Configuration Figure 2-9 shows a UPS connected to the power mains through an attached power cord (appropriate cords are supplied for each situation automatically). The UPS has eight IEC 320 receptacles for use with the rack jumper cords. The E7671A PDU connects to the UPS via a detachable line cord, which connects to the PDU via a C-19 plug. This cord connects to the UPS with a C-20 plug.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-9.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Dual Power Supply and High Density Configuration Examples A dual power supply configuration can be created by ensuring that two different branch circuits feed two different Uninterruptible Power Supplies, which in turn power two PDUs. Figure 2-10 shows a dual power cabling example. This example shows two LXr 8000 units powered by two PDUs, and two UPS units.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-10.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-11.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Cable Routing: Creating the Cable Management Loop In a fully utilized HP NetServer LXr 8000, you can form a cable management loop by connecting cables with the server fully extended from the rack. (Be sure to extend the anti-tip foot from the front of the rack before extending the server. Also only extend one piece of equipment at a time.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 Figure 2-12. Forming the LXr 8000 Cable Management Loop Power Up the Components in the Rack Follow the Power Up Sequence to minimize initial surge currents and prevent breakers from tripping. Power Up Sequence 1. Ensure that the mass storage unit DIP switches are set for SCSI ID spinup order. See documentation included with the unit for more information. 2. Power on the tape back-up unit, if one is present. 3.
Chapter 2 Connecting and Routing Cables to the HP NetServer LXr 8000 5. If an HP Console Switch is present, it must be on before the server is turned on. Otherwise, the server will not detect all the required components and will likely report an error. 6. Lastly, power on one server at a time, waiting for fan units to spin up before powering on the next (if more than one is present in the rack). Power Down Considerations To power off the equipment, ensure that the network has been properly warned.
3 Cabling Reference Information Power Cords and Component Reference Table 3-1 gives details of the plugs and receptacles for three different power alternatives for use with the HP NetServer LXr 8000. Table 3-1. LXr 8000 Plugs and Receptacles Reference 208V Mains 230V Mains LXr 8000 Jumper Cord Model No. E7798A C19 to C20, 2.5 m E7798A C19 to C20, 2.5 m RS/8 PDU Jumper Cord Model No. E7742A 90 inch (2.3 m) E7742A 90 inch (2.
Chapter 3 Cabling Reference Information Wide Ranging PDU Configurations Use of four possible 208 - 240 VAC PDU configurations depends upon the power requirements of the devices in the rack. Table 3-1 shows the characteristics used to determine how many PDUs are supplied with each rack configuration. In configurations that use a wide-ranging 10-amp PDU, it will always be plugged into a wide ranging 16-amp PDU. Table 3-2.
Chapter 3 Cabling Reference Information Table 3-3. Receptacles Needed for Different Units Component Receptacles Required HP NetServer LXr 8000 one C19 HP NetServer Pro8 one C19 HP Rack Storage/8 two C13 or use Y-Cable* All other devices one C13 * Two Y-Cables may be used to connect two HP Rack Storage/8 units to two C13 receptacles. 3.
Chapter 3 Cabling Reference Information Power and Current for Estimating Supply Needs Table 3-4. Approximate Current Requirements of Rack Optimized Devices and Components Device (Notes 1, 2, 3) HP NetServer LXr 8000 HP NetServer LH 3r HP NetServer LXr Pro8 HP NetServer LXr Pro HP Rack Storage/8 Monitor (14-inch.) Monitor (15-21-inch.) DLT Library DLT Mechanism HP SureStore Autoloader 418 DAT 24x6e DAT 24e Console Switch Power Power 100v (VA) (W) Amps 1121 1077 N/A 650 626 6.3 980 970 N/A 450 446 4.
Chapter 3 Cabling Reference Information This is a summary of key cabling guidelines. For complete details, see the HP rack configuration tools located on the worldwide web.
Chapter 3 Cabling Reference Information Cooling Requirements for the HP NetServer LXr 8000 The HP NetServer LXr 8000 should be kept at an operating temperature between 68 and 72 degrees F. Because of the heat generated by the HP NetServer LXr 8000, both the front and rear doors of the rack have perforated surfaces. If you are installing the HP NetServer LXr 8000 in a rack which does not have front and rear perforated doors, replace the doors on your rack with perforated doors to ensure proper cooling.
Index A air flow in the rack, 46 C Cable Guide installation, 16 cable management forming a cable management loop, 38 how to attach the Cable Guide, 16 planning for, 44 power cords within occupied area, 26 power cords within same EIA unit, 26 cable management loop how to form, 38 how to form for the LXr 8000, 37 cable routing cabling guidelines for the LXr 8000, 23 guidelines for server and storage unit distance, 25 overview of guidelines, 44 overview of procedure, 7 power cables, 25 cabling SCSI cables from
Index due to cable length, 45 power cabling, 25 illustration of rack receptacles, 27 procedure, 25 Power Distribution Unit 208 VAC illustration, 30 208 VAC, LXr 8000 configuration, 28 208/240 VAC, 10 amp extension, 16 208/240 VAC, 16 amp, 16 230/240 VAC illustration, 31, 33 configuration guidelines, 42 configurations for LXr 8000, 18 determining and balancing load on double PDUs, 26 how to mount the PDU, 16 models, illustration, 18 mounting limitations, 20 mounting the model vertically, 21 mounting the uni
Index T turn on power, 38 UPS or uninterruptible power supply unterminated power cord for, 8 U Uninterruptible Power Supply installation, 5 plug in early to charge batteries, 4 unpacking components, 4 rack enclosure, 3 UPS. See Uninteruptible Power Supply.
