S6605 BPX6605 PCI Express Split Backplane 6 Segments

FEATURES

	20-slot form factor supports four SHBs and PCI-Express option cards
	Two x16 PCI Express® mechanical slots per segment
	One x8 PCI Express® mechanical slot per segment
	Optimized for use with all PICMG® 1.3 SHBs
	Available in standalone or Ethernet fabric configurations
	Flexible power connection options

BP6FS6605

**Optional USB, Ethernet, connectivity provided by PICMG 1.3 SHB.
Not all SHBs support this capability.
Nominal PCB thickness: 0.080"
Connector spacing: 0.800"
Mounting holes: 0.156" diameter
All dimensions are inches.

Four-SEGMENT PCI EXPRESS™ BACKPLANE
The BP4FS6890 is a four-segment PICMG® 1.3 backplane targeted at cluster computing applications. The BP4FS6890 backplane features support for up to four server-class or graphics-class system host boards. Each backplane segment is called an SHB segment and contains one system host board slot plus multiple PCI Express option card slots. On server-class models, an SHB segment contains two x16 PCI Express mechanical slots and one x8 PCIe mechanical slot. Graphics-class backplane models feature two x16 mechanical slots where one of the slots is driven with a x16 PCIe electrical link. The BP4FS6890 backplane supports all Chassis Plans' system host boards including the high performance MCX/MCG-series featuring two, multi-core Intel® Xeon® processors and the TQ9 featuring the Intel® Core™ 2 Q9400 long-life, quad-core embedded processor.

PCI EXPRESS OPTION CARD SLOTS
GRAPHICS-CLASS CONFIGURATION
In a graphics-class configuration of the BP4FS6890, the SHB slot in each backplane segment supports a graphics-class PICMG 1.3 system host board such as Chassis Plans MCGT. Each graphics-class SHB segment supports the segment’s x16 PCI Express (PCIe) mechanical slot with a x16 PCIe electrical link from the SHB. There is one x16 PCIe mechanical slot forwith a x4 link.

SERVER-CLASS CONFIGURATION
In a server-class configuration of the BP4FS6890, the SHB slot in each backplane segment supports server-class PICMG 1.3 system host boards such as the Chassis Plans' MCXT. Each server-class SHB segment supports two x16 PCI Express (PCIe) mechanical slot with a x8 PCIe electrical link from the SHB. One x16 mechanical slot is provided per segment with a x4 link.

OPTIONAL ETHERNET FABRIC NETWORK Chassis Plans' BP6FS6890 backplane is available with an optional Ethernet fabric to enable the SHBs in each segment to share data and communicate information to and from the system host via the backplane's Ethernet hub port.

The backplane's optional Ethernet hub switch makes this functionality possible. The Ethernet hub switch controls the SHB-to-SHB communication and the SHB's communication to the host system via the 10/100/1000Base-T Ethernet port interface.

This optional backplane capability requires that the SHB support the optional Ethernet interface routing to SHB edge connector C as defined in the PICMG® 1.3 specification.

The Ethernet fabric on the BP4FS6890 backplane enables many system advantages in applications that require cluster computing.

Consult your SHB’s Ethernet interface implementation method for details.

PRINTED CIRCUIT LAYERS
The backplane is a six-layer, .080” thick board with three separate signal, power (+5V/+12V, +3.3V ) and ground layers. Multi-layer backplane construction provides excellent noise immunity.

POWER INDICATORS
Surface-mount LEDs provide a convenient visual check for +5V, +5V AUX,+12V, -12V and +3.3V power connection and status. CAUTION: Never install or remove an SHB or any option card from any segment when any LED is illuminated.

POWER CONNECTION OPTIONS
Each backplane segment provides soft control power circuitry to control the power-up and power-down sequences of each SHB segment. Connecting an independent power source to each segment maximizes the power control aspect of each backplane segment.

The BP4FS6890 backplane allows segments to be powered individually or grouped together for the purpose of being powered by a single power source. Care must be used when grouping segments together to ensure that adequate power is provided and the desired power sequences are controlled.

The BP4FS6890 backplane supports two input power backplane connector options: ATX/EPS and Terminal Blocks:

STANDARD ATX/EPS SEGMENT POWER CONNECTORS
In this configuration, each SHB segment is usually powered by a separate ATX or EPS power supply. A 24-pin right-angle power connector in each SHB segment provides the interface to the segment’s power supply.

Each segment also includes a +12V auxiliary power connector for routing the auxiliary power directly to the SHB’s edge connectors. This new capability of PICMG 1.3 compliant SHBs and backplanes eliminates the need for auxiliary power connections on the system host board.

The BP4FS6890 backplane power connectors used in the standalone configuration are suitable for use with either an ATX or EPS power supply.

TERMINAL BLOCK SEGMENT POWER CONNECTORS
The terminal block connectors enable each SHB segment or multiple segments to be powered by a +12V power source. The voltage regulator circuits in each SHB segment provide all of the required voltage levels for the SHB and option card slots. Using the terminal blocks is the recommended method for grouping together segments in order to drive multiple segments with a common power supply. (Note: grouping segments with the standard ATX/EPS power connectors is also allowed, but Chassis Plans' recommends using the terminal blocks for this type of multiple SHB segment power connection.) Each segment’s four-position terminal block provides additional power capacity and up to 80 Amps of +12V.

USING SOFT-POWER CONTROL SIGNALS
New power supply technologies and the soft-power control signals available via the Advanced Configuration and Power Interface (ACPI) are supported by PICMG 1.3 SHBs and backplanes. Auxiliary power connectors located on the PICMG 1.3 backplanes can deliver all of the power directly to the edge connectors of the SHB.

Auxiliary power connectors on the backplane are provided to help improve system Mean Time To Repair (MTTR). All power can be delivered to the SHBs via the board's edge connectors. Chassis Plans' PICMG 1.3 SHBs and backplane SHB edge connector slots have ample power pins available to meet the power demands of high-performance dual processor SHBs. The ATX/EPS and +12V power connectors on the B4FS6890 backplane also have an ample number of power pins available to meet these demands. The system designer needs to be aware of the potential power demands of the entire system including the particular SHB to ensure that both the power supply and the power connectors in the cable harness can safely deliver the necessary power to drive the entire system.

Specific implementations of ACPI signals, ATX/EPS power supply type and the operating system software will determine the specific connection method for the power supply. For example the use of the Power Good (PWRGD), Power Supply On (PSON#), Five Volt Standby (5VSB) and the Power Button (PWRBT#) ACPI or soft power control signals require the following connection method:

ACPI signal usage is optional and may be turned off using the SHBs BIOS and/or signal jumpers. Specific power connections and BIOS parameters will differ depending on unique system design requirements. Refer to the Appendix B (Power Connection) and Advanced Setup BIOS sections found in the Technical Reference Manual for your specific Chassis Plans system host board for more information.

MODEL#	MODEL NAME	*DESCRIPTION (Server-class Configurations)**
S6890-005	BP4FS6890-SCSR	Server-class, Standalone Communications, Right-angle EPS/ATX and +12V AUX Connectors
S6890-016	BP4FS6890-SCST	Server-class, Standalone Communications, +12V Terminal Block Connectors
S6890-025	BP4FS6890-SCER	Server-class, Ethernet Fabric Communications, Right-angle EPS/ATX and +12V AUX Connectors
S6890-036	BP4FS6890-SCET	Server-class, Ethernet Fabric Communications, +12V Terminal Block Connectors

*Use with server-class SHBs such as the Chassis Plans' MCXT, SLT or SLI
Note: Chassis Plans' SLT and SLI will not support the Ethernet fabric option on the BP4FS6890 backplane

MODEL#	MODEL NAME	*DESCRIPTION (Graphics-class Configurations)**
S6890-105	BP4FS6890-GC1SR	Graphics-class, Standalone Communications, Right-angle EPS/ATX and +12V AUX Connectors
S6890-116	BP4FS6890-GC1ST	Graphics-class, Standalone Communications, +12V Terminal Block Connectors
S6890-125	BP4FS6890-GC1ER	Graphics-class, Ethernet Fabric Communications, Right-angle EPS/ATX and +12V AUX Connectors
S6890-136	BP4FS6890-GC1ET	Graphics-class, Ethernet Fabric Communications, +12V Terminal Block Connectors

*Use with graphics-class SHBs such as the Chassis Plans' MCGT, TML

PCI Express Backplanes Reference Manual (3.2MB) - Click Here