CyClone 600-2712 User manual

The information in this document has been carefully checked and is believed to be entirely reliable. However, no
responsibility is assumed for inaccuracies. Furthermore, Cyclone Microsystems, Inc. reserves the right to make
changes to any products herein to improve reliability, function, or design. Cyclone Microsystems, Inc. neither
assumes any liability arising out of the application or use of any product or circuit described herein, nor does it
convey any license under its right or the rights of others.
Revision 1.0, February 2015
Copyright 2015 by Cyclone Microsystems, Inc.
600-2712
PCIEXPRESSEXPANSION
SYSTEM
USER’S MANUAL

CONTENTS
i600-2712 PCI Express Gen2 Expansion System User’s Manual
Revision 1.0, February 2015
CHAPTER 1
1.1 INTRODUCTION..............................................................................................................................1-1
1.2 SPECIFICATIONS............................................................................................................................1-3
1.3 STANDARDS ...................................................................................................................................1-4
1.4 ORDERING INFORMATION............................................................................................................1-5
1.5 PCIE2-2712 MAJOR COMPONENTS..............................................................................................1-5
CHAPTER 2
2.1 THEORY OF OPERATION ..............................................................................................................2-1
CHAPTER 3
3.1 INSTALLING HBA IN HOST.............................................................................................................3-1
3.1.1 Connecting Expansion Systems to Host .............................................................................3-1
3.2 POWERING UP................................................................................................................................3-1
3.1.1 Installing Cards in Expansion Systems ...............................................................................3-1
3.3.2 Seating of PCIe Add-In Cards.............................................................................................2-1
CHAPTER 4
4.1 PCIE LINK ISSUES..........................................................................................................................4-1
4.2 BIOS CONCERNS ...........................................................................................................................4-1
CHAPTER 5
5.1 INTRODUCTION..............................................................................................................................5-1
5.2 INSTALLATION IN HOST ................................................................................................................5-1
5.3 PCIE2-426/425 LEDS.......................................................................................................................5-1
5.4 MECHANICAL..................................................................................................................................5-1
5.5 PCIE2-436/439 UPSTREAM ADAPTOR CARDS............................................................................5-1
5.5.1 PCIe2-436/439 LEDs...........................................................................................................5-2
5.5.2 Mechanical ..........................................................................................................................5-2
5.5.3 PICe2-436/439 Output Swing, De-Emphasis and Receive Equalization.............................5-2
5.5.4 PCIe2-426/425 Output Swing, De-Emphasis and Receive Equalization.............................5-7
CHAPTER 6
6.1 CHASSIS FEATURES......................................................................................................................6-1
6.2 LINK INDICATION-LED DEFINITION PCIE2-462............................................................................6-2
6.3 CONNECTORS, HEADERS AND JUMPERS..................................................................................6-2
6.3.1 PCIe2-462 Jumpers and Headers.......................................................................................6-2
6.3.2 J27 "ENCL SW" Chassis Intrusion Switch Connector.........................................................6-2
6.3.3 J26 "SSI" SSI Auxiliary Signal Connector ...........................................................................6-2
6.3.4 Z2 "PNL LED" Front Panel LED Connector.........................................................................6-3
6.3.5 J30, J31, J33 Fan Connectors.............................................................................................6-3
6.3.6 J28, J29, J32 "THM1", THM2", THM2X" Thermistor Connectors........................................6-4
6.3.7 J35 "PLX I2C" PEX Device Editor Connector......................................................................6-4
6.3.8 J36 "ALTERA JTAG" JTAG Connector, J36 "XILINX JTAG" JTAG Connector, J19-J23
"JTAG", JTAG Bypass Jumper for Slots J1-15, J14-J18 "JTAG", JTAG Bypass Jumpers for
Slots J8-J12.........................................................................................................................6-4

CONTENTS
600-2712 PCI Express Gen2 Expansion System User’s Manual ii
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6.4 CHASSIS COOLING........................................................................................................................6-6
6.4 CHASSIS POWER...........................................................................................................................6-6
6.5.1 1250W Power Supply Option ..............................................................................................6-6
6.5.2 2180W/3240W Power Supply Options...............................................................................6-7
6.6 LIGHT LOADING..............................................................................................................................6-7
6.7 POWER CONSIDERATION.............................................................................................................6-8
CHAPTER 7
7.1 REFERENCE MANUALS.................................................................................................................7-1
APPENDIX A - Warranty and Service
A.1 OVERVIEW..................................................................................................................................... A-1
A.2 HARDWARE.................................................................................................................................... A-1
A.3 SOFTWARE AND FIRMWARE.......................................................................................................A-1
A.4 EFFECTIVE PEROID OF WARRANTY .......................................................................................... A-1
A.5 REPAIRED OR REPLACEMENT PRODUCT (OUT-OF-WARRANTY).......................................... A-1
A.6 SERVICE POLICY........................................................................................................................... A-2
APPENDIX B - Server Safety Information

CONTENTS
ii 600-2712 PCI Express Gen2 Expansion User’s Manual
Revision 1.0, February 2015
LIST OF FIGURES
Figure 1-1. PCIe2-2712 Block Diagram.................................................................................................1-2
Figure 1-2 PCIe2-2712 Front View Open .............................................................................................1-7
Figure 1-3 PCIe2-2712 Top View with HBA..........................................................................................1-8
Figure 1-4 PCIe2-2712 Top View .........................................................................................................1-9
Figure 5-1. PCI2e-426 LEDs..................................................................................................................5-3
Figure 5-2 PCIe2-426 Physical Configuration.......................................................................................5-3
Figure 5-3 PCIe2-436 LEDs..................................................................................................................5-4
Figure 5-4 PCIe2-436 Physical Configuration.......................................................................................5-4
Figure 5-5 PCIe2-425 LEDs..................................................................................................................5-5
Figure 5-6 PCIe2-425 Physical Configuration.......................................................................................5-5
Figure 5-7 PCIe2-439 LEDs..................................................................................................................5-6
Figure 5-8 PCIe2-439 Physical Configuration.......................................................................................5-6
Figure 6-1 PCIe2-462 Physical Configuration.......................................................................................6-1
LIST OF TABLES
Table 1-1 Physical/Environmental Characteristics ..............................................................................1-3
Table 1-2 3240W N+1 Redundant Power Supply Characteristics.......................................................1-3
Table 1-3 2180W N+1 Redundant Power Supply................................................................................1-4
Table 1-4 1250W Power Supply Characteristics.................................................................................1-4
Table 3-1 Installing PCIe Add-In Cards...............................................................................................3-1
Table 3-2 Slot Capabilities...................................................................................................................3-2
Table 4-1. PCIe Link Issue ...................................................................................................................4-1
Table 4-2 Link LED Indication..............................................................................................................4-2
Table 5-1 PCIe2-426 or PCIe2-425 Power Requirements ..................................................................5-1
Table 5-2 PCIe2-426 Default DIP Switch Configuration......................................................................5-7
Table 5-3 PCIe2-425 Default DIP Switch Configuration......................................................................5-7
Table 6-1 SSI Auxiliary Signal Connector............................................................................................6-3
Table 6-2 Front Panel LED Connector ................................................................................................6-3
Table 6-3 Fan Connectors...................................................................................................................6-3
Table 6-4 J36 ALTERA JTAG Connector............................................................................................6-4
Table 6-5 J37 SILINX JTAG Connector...............................................................................................6-5
Table 6-6 Jumpers...............................................................................................................................6-5
Table 6-7 Headers...............................................................................................................................6-6
Table 6-8 1250W Power Supply Minimum Loading.............................................................................6-7
Table 6-9 2180W/3240W Power Supply Minimum Loading ................................................................6-8
Table 6-10 PCIe2-462 Power Requirements.........................................................................................6-8
Table 6-11 PCIe2-426/425 Power Requireemnts..................................................................................6-8
Table 6-12 Power Supplied Per PCIe Slot.............................................................................................6-8

PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 1-1
Revision 1.0, February 2015
CHAPTER 1
INTRODUCTION
1.1 INTRODUCTION
The Cyclone Microsystems PCIe2-2712 is a PCI Express (PCIe) Gen2 Expansion System that supports
the addition of up to ten PCI Express I/O cards to a single host computer. Most host computers contain
few PCI Express slots making them poorly suited for building complex systems requiring many
different I/O boards and co-processor resources. The PCIe2-2712 Expansion System has been designed
for applications requiring multiple PCIe I/O and co-processing resources.
PCIe2-2712 system is composed of three elements: a PCI Express Host Bus-to-Cable Adapter, an
Expansion cable, and an Expansion Chassis. The PCIe2-2712 system can be configured with either a x8
or a x16 interface between the host computer and the expansion backplane. For the x8 configuration, a
PCIe2-425 Host Bus-to-Cable Adapter card is inserted into a host computer’s x8 PCIe Gen2 slot. A x8
PCIe external cable links the PCIe host to the expansion chassis. For the x16 configuration, a PCIe2-
426 Host Bus-to-Cable Adapter card is inserted into a host computer’s x16 PCIe Gen2 slot. A x16 PCIe
external cable links the PCIe host to the expansion chassis. The expansion chassis is populated with a
ten slot x8 switched backplane, an up-stream cable adapter (either x8 or x16), and, optionally, a system
monitor board. All expansion slots use open back x8 connectors which accommodate full length cards
with a x1, x4, x8, or x16 PCIe interface. The backplane and add-in cards are cooled by four 77 CFM
fans. The PCIe2-2712 is avaliable with either a 3240 W or 2180 W N+1 redundant power supply in a
5U chassis, or a 1250 W standard ATX supply in a 4U chassis.
The PCIe-2712 Expansion System supports 160 or 80 Gb/s bi-directional traffic to and from the host
system. The system utilizes low latency PCIe Bus repeaters and non-blocking PCI Express switches for
excellent peer-to-peer I/O bandwidth. For host computers with modern BIOSs, the PCIe2-2712
Expansion System is recognized by the host system upon boot-up, requires no hardware specific
drivers, and is entirely host operating system independent.
PCI Express is a high performance, general purpose I/O inter-connect defined for a wide variety of
computing and communication platforms. Key PCI attributes, such as its usage model, load-store archi-
tecture, and software interfaces are maintained, whereas its parallel bus implementation is replaced by a
serial interface. PCI Express take advantage of recent advances in point-to-point inter-connects, switch-
based technology, and packetized protocol to deliver new levels of performance.

INTRODUCTION
1-2 PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
Revision 1.0, February 2015
Figure 1-1. PCIe2-2712 Block Diagram
PCI-to-PCI
Bridge Link
PCIe2
96 Lanes
PCI-E 401
Host PCI Express
System
Switch
x8 Gen2
x8 Gen2
x8 Gen2
x8 Gen2
Host Bus
Adapter
J9
J6
J4
J8
J12
J10
PCIe2 x8 Slot
PCIe2 x8 Slot
PCIe2 x8 Slot
PCIe2 x8 Slot
System Monitoring Card
PCIe2 x8 Slot
PCIe2 x8 Slot
PCIe2 x8 Slot
PCIe2 x8 Slot
PCIe2 x8 Slot
PCIe2 x8 Slot
PCIe2 Upstream
Adapter Card
J2
J3
J7
J1
J11
J5
x8 Gen2
x8 Gen2
x8 Gen2
x8 Gen2
x8 or x16
Gen2
x8 Gen2
x8 Gen2
x8 or x16
PCI Express Cable
PCIe2-462
x16 Cable -
PCIe2-426
x8 Cable -
PCIe2-425
x16 PCIe2-436
x8 PCIe2-439

INTRODUCTION
PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 1-3
Revision 1.0, February 2015
1.2 SPECIFICATIONS
The specifications in Table 1-1 detail the PCIe2-2712 Expansion System chassis including the PCIe2-
462 expansion backplane, PCIe2-436 or PCIe2-439 Upstream Cable adapter and chassis/power supply.
The chassis also includes Four 77 CFM fans.
Table 1-1. Physical/Environmental Characteristics
Table 1-2. 3240W N+1 Redundant Power Supply Characteristics
Height 8.75 inches (5U Chassis)
7 inches (4U Chassis)
Width 17 inches
Depth 27 inches
Weight 80 lbs (5U chassis)
50 lbs (4U chassis)
Operating Temperature 0 to 50 Degrees Celsius
Relative Humidity 0% to 95% (non-condensing)
Storage Temperature -20 to 70 Degrees Celsius
Voltage 90-264 VAC
Frequency 47-63 Hz.
Input Current 45A (115 VAC), 22.5A
(240 VAC)
Maximum Inrush Current 30A (115 VAC), 15A
(230 VAC) per Module
Total DC Output 3240W
DC Output Specs Output Voltage Output Current
Min Output Current Max
+5V 1 24
+12V 6 263
-12V 0 1.5
+3.3V 1 24
+5VSB 0.1 4

INTRODUCTION
1-4 PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
Revision 1.0, February 2015
Table 1-3. 2180W N+1 Redundant Power Supply
Table 1-4. 1250W Power Supply Characteristics
1.3 STANDARDS
PCI Express Base Specification Revision 2.0
PCI Express Card Electro Mechanical Specification 2.0
PCI Express External Cabling Specification 2.0
Voltage 90-264 VAC
Frequency 47-63 Hz.
Input Current 30A (115 VAC), 15A
(230 VAC)
Maximum Inrush Current 30A (115 VAC), 15A
(230 VAC) per Module
Total DC Output 2180W
DC Output Specs Output Voltage Output Current
Min Output Current Max
+5V 1 24
+12V 6 178
-12V 0 1.5
+3.3V 1 24
+5VSB 0.1 4
Voltage 90-264 VAC
Frequency 47-63 Hz.
Input Current 15A (100 VAC),
7.5A (240 VAC)
Maximum Inrush Current 50A (115 VAC),
100A (230 VAC)
Total DC Output 1250W
DC Output Specs Output Voltage Output Current
Min Output Current Max
+5V 0 25
+12V 0.6 104
-12V 0 0.5
+3.3V 0 25
+5VSB 0 3

INTRODUCTION
PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 1-5
Revision 1.0, February 2015
1.4 ORDERING INFORMATION
The expansion system is avaliable with one or three meter cable, standard or low profile panels on the
Host Bus adapter (PCIe-426), 1250W, 2180W or 3240W power supply, and the optional Chassis
Monitor board.
1.5 PCIE2-2712 MAJOR COMPONENTS
• 600-R2051 4 U Chassis
• 600-R2032 5U Chassis
• PCIe2-462 Expansion Backplane
• x16 Cable Version
> x16 Cable - 1 or 3 meters
> PCIe2-436 x16 upstream card (installed on PCIe2-462 Backplane)
> PCIe2-426 x16 HBA
Cyclone Part Numbers
600-2712-1-12SA Expansion System with 1 meter cable and 1250W
Power Supply (4U chassis) x16 host link
600-2712-3-12SA Expansion System with 3 meter cable and 1250W
Power Supply (4U chassis) x16 host link
600-2712-1-21SA Expansion System with 1 meter cable and 2180W
Power Supply (5U chassis) x16 host link
600-2712-3-21SA Expansion System with 3 meter cable and 2180W
Power Supply (5U chassis) x16 host link
600-2712-1-32SA Expansion System with 1 meter cable and 3240W
Power Supply (5U chassis) x16 host link
600-2712-3-32SA Expansion System with 3 meter cable and 3240W
Power Supply (5U chassis) x16 host link
600-2712-1-12SB Expansion System with 1 meter cable and 1250W
Power Supply (4U chassis) x8 host link
600-2712-3-12SB Expansion System with 3 meter cable and 1250W
Power Supply (4U chassis) x8 host link
600-2712-1-21SB Expansion System with 1 meter cable and 2180W
Power Supply (5U chassis) x8 host link
600-2712-3-21SB Expansion System with 3 meter cable and 2180W
Power Supply (5U chassis) x8 host link
600-2712-1-32SB Expansion System with 1 meter cable and 3240W
Power Supply (5U chassis) x8 host link
600-2712-3-32SB Expansion System with 3 meter cable and 3240W
Power Supply (5U chassis) x8 host link

INTRODUCTION
1-6 PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
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• x8 Cable Version
> x8 Cable - 1 or 3 meters
> PCIe2-439 x8 upstream card (installed on PCIe2-462 Backplane)
> PCIe2-425 x8 HBA
• Optional Cyclone CM027 System Monitor Board
• Optional Rack Mount Glide Rails and Rack Mount Ears

INTRODUCTION
PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 1-7
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Figure 1-2. PCIe2-2712 Front View Open

INTRODUCTION
1-8 PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
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Figure 1-3. PCIe2-2712 Top View with HBA

INTRODUCTION
PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 1-9
Revision 1.0, February 2015
Figure 1-4. PCIe2-2712 Top View

PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 2-1
Revision 1.0, February 2015
CHAPTER 2
THEORY OF OPERATION
2.1 THEORY OF OPERATION
The basic PCI Express link consists of dual unidirectional differential links, implemented as a transmit
pair and a receive pair. The signaling rate for PCI Express Gen2 is 5.0 Gigabits/second/Lane/direction.
A link supports at least one lane.
The PCI Express link from the PCIe2-426 over the cable to the PCIe2-462 is a sixteen lane (x16) link.
The PCI Express link from the PCIe2-425 over the cable to the PCIe2-462 is an eight lane (x8) link. The
PCIe2-462 provides ten slots which are populated mechanically with x8 connectors. All sots can
accommodate either a single lane (x1), x4, x8, or x16 add-in cards. Although not expressly permitted by
the PCI Express Specification, all slots accommodate “down-shifting” a x16 card into x8 slot due to the
PCIe2-462 backplane’s usage of open back PCIe connectors. Plugging a smaller link card into a larger
link connector is fully allowed.
Once the PCIe2-426 or PCIe2-425 is installed into the host PC, the cable connected to the PCIe2-2712
chassis, the chassis plugged into an AC power outlet and any desired add-in cards are installed, the
system is ready to be turned on. When the host is turned on, a signal from the PCIe2-426/PCIe2-425
will turn on the PCIe2-2712 chassis. A number of things happen at this point. First, the PCI Express
links are initialized. This is a purely hardware initialization where each PCI Express link is set up
following a negotiation of lane widths by the two ends of each link. No firmware or operating system
software is involved. Once the links are initialized or “trained”, there are LED indicators on each of the
Cyclone Microsystems cards that indicate that the links are trained. A detailed explanation of the LEDs
follows later in this manual.
One essential requirement for system initialization is the ability of the host system’s BIOS to be able to
enumerate the many bridges inherent in a complex PCI Express design. The links from the PCIe2-426/
425 to the PCIe2-462 are created with PCI Express Switches. Each link looks like a PCI-to-PCI bridge
to the Host’s BIOS. The number of bridges can add up quickly. Older BIOS may not have the resources
to enumerate a large number of bridges. Make sure that the BIOS packages on the host computer has the
latest updates. If required, contact the host system’s manufacturer to make sure that the BIOS used can
handle the large number of bridges that it will see in the system.

PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 3-1
Revision 1.0, February 2015
CHAPTER 3
GETTING STARTED (INSTALLATION)
3.1 Installing HBA in Host
The PCIe2-425 or PCIe2-426 HBA is installed into the Host System following directions for installing
add-in PCIe cards provided by the Host System. The PCIe2-425 requires a x8 or greater slot and the
PCIe2-426 requires a x16 slot.
3.1.1 Connecting Expansion System to Host
Connect the PCIe cable to the HBA mounted in the host and to the upstream card in the Expansion
Chassis. Confirm that the mechanical latch is secure to assure good electrical connections.
3.2 Powering Up
The expansion system is switched on by the Host System. A “Power On” signal is included in the cable
indicating to the Expansion System to power on or off.
3.2.1 Installing Cards in Expansion System
PCIe add-in cards Should be installed in the Expansion Chassis with the Power OFF. The power for the
expansion chassis is controlled by the host system. Powering down the host will be turn off power to
the expansion chassis.
Table 3-1. Installing PCIe Add-in Cards
3.2.2 Seating of PCIe Add-In Cards
Unlike standard PC applications, the PCIe2-2712 Expansion Systems has a narrow lower gate that
precisely engages the lower end of the PCI Express Add-In board’s face panel. The purpose is to ensure
correct electrical connector mating of up-plugged boards. Failure to accurately mate the lower end of
the face panel with the chassis lower gate will lead to the board not being recognized by the host.
1 Power down Chassis
2 Remove top cover
4 Install PCIe Add-in Cards
5 Secure Add-in Card and panel with mounting screw
6 Replace cover

GETTING STARTED (INSTALLATION)
3-2 PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
Revision 1.0, February 2015
Table 3-2. Slot Capabilities
On the PCIe2-462, the slot connector size matches the slot width back to the backplane switch. All ten
slots use open back connectors taht allow users to plug in larger add-in cards. Slots J6 and J7 use PCIe
slot connectors but proprietary pin outs and are not for general purpose use. Slot J10 is for the Upstream
cable Adapter and slot J7 is for the optional System Monitor board. Only Cyclone Microsystems
Upstrean Cable Adapters and System Monitor boards should be installed in slots J6 and J7 respectively.
Table-3-2 summarizes the slot capabilities.
Slot Connector Lanes Width
J1 x8 connector x8 lanes single
J2 x8 connector x8 lanes single
J3 x8 connector x8 lanes single
J4 x8 connector x8 lanes single
J5 x8 connector x8 lanes single
J6 x16 connector Upstream Cable Slot single
J7 x1 connector Monitor Slot single
J8 x8 connector x8 lanes single
J9 x8 connector x8 Lanes single
J10 x8 connector x8 Lanes single
J11 x8 connector x8 lanes single
J12 x8 connector x8 lanes single

PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 4-1
Revision 1.0, February 2015
CHAPTER 4
TROUBLE SHOOTING/SYSTEM OPERATIONS
4.1 PCIE LINK ISSUES
A PCI Express subsystem is comprised of a series of point-to-point connections. On start up, the
devices on each end of each connection establish a link with each other through hardware mechanisms.
Once linked, communication between the devices can occur. However, hardware problems can prevent
the PCIe devices from linking properly.
On the PCIe2-2712 expansion system, the link status is between two devices is presented to the user by
an LED (see section table 3.2). The potential LED states are listed in table 3.1 of this document. If an
LED is not on after the PC boots, or is blinking at random intervals, then a hardware problem is
occurring. Potential causes of a PCIe link issue are:
Table 4-1. PCIe Link Issue
4.2 BIOS CONCERNS
Per the PCIe specification, the PC BIOS should be able to handle the additional devices added to the
system via the PCIe2-2712 expansion unit. However, on occasion, a BIOS may have a bug that prevents
the system from allocating resources to all devices during the PCIe configuration process. Symptoms of
this include:
- PC won’t boot with expansion unit installed (monitor may not power on, or BIOS will hang)
- O/S will hang during boot sequence (typically during device driver initialization)
- Device Drivers will fail to operate properly for some of the boards installed (evident via
Windows Device Manager)
- Installed devices missing in Windows Device Manager
Cause of Problem Links Affected Potential Solution
PCIe cable is not fully inserted on
one/both ends of the cable Cable Carefullyapplypressuretothecablewhile inserting it until it clicks into place.
Incompatible host system Cable Update BIOS and adjust BIOS options concerning PCI Express, or use
alternative host system
Expansion system power supply
not turning on Cable/Slots Ensure cable is fully inserted, then contact Cyclone Microsystems
No add-in card is installed in a
given slot Slots No problem - Link LED should remain off.
Add-in card not seated properly
in PCIe expansion slot Slots Carefully apply pressure to the top of the
add-in card while inserting it until it click
into place.
Auxiliary power connectors not
installed on add-in cards Slots with GPUs installed Connect the appropriate 6 or 8-pin PCIe power connector to GPU.

TROUBLE SHOOTING/SYSTEM OPERATIONS
4-2 PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
Revision 1.0, February 2015
If you suspect you are encountering a BIOS enumeration issue, try updating the BIOS to the latest
version posted on the PC manufacturer’s website. If the problem persists, use a different PC make and
model, or contact the PC manufacturer for additional assistance.
Table 4-2. Link LED Indication
OFF Link is down
ON Link is up, all lanes, Gen2 (5GT/s) rate.
BLINK: 0.5 seconds ON, 0.5 seconds OFF Link is up, reduced lanes, Gen2 (5GT/s rate)
BLINK: 1.5 seconds ON, 0.5 seconds OFF Link is up, all lanes, Gen1 (2.5GT/s rate).
BLINK: 0.5 seconds ON, 1.5 seconds OFF Link is up, reduced lanes, Gen1 (2.5GT/s rate).

PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual 5-1
Revision 1.0, February 2015
CHAPTER 5
PCIE2-425/PCIE2-426 AND PCIE2-439/PCIE2-436
5.1 INTRODUCTION
Host Bus adapters (HBA) are the PCIe2-425 for x8 cables and the PCIe2-426 for x16 cables. They are
repeater based.
5.2 INSTALLATION IN HOST
The PCIe2-426 Host Bus Cable Adapter is installed in a host computer’s x16 Gen2 slot providing an
interface from the host to the x16 cable and, in turn, the expansion chassis. It can also be plugged into a
Gen1 slot, reducing performance.
5.3 PCIe2-426/425 LEDs
The bottom (or left) LED on the HBA front panel is the "Cable and Expasnion Chassis Detect" LED.
When the LED is ON, the HBA is detecting the cable and expansion chassis. If this LED is OFF, there
may be a problem with +3.3V power in the expansion chassis or the PCIe Expansion Cable is not
connected properly.
The top (or right) LED on the panel is "Expansion System Signal Detect". The LED is on when the
HBA detects a signal on Lanes 0-3 of the PCIe cable. The LED ON indicates normal operation. If the
LED is not on, there is something wrong with the cable or the expansion system is not operating
properly.
5.4 MECHANICAL
The PCIe2-426 and PCIe2-425 are low profile PCI Express add-in cards and are available with either a
standard height front panel or a low profile front panel. For the PCIe2-426, see Figure 5-2 for a
mechanical drawing of the card and Figure 5-1 for a front panel drawing. For PCIe2-425, see Figure 5-
6 for a mechanical drawing of the card and figure 5-5 for a front panel drawing.
Table 5-1. PCIe2-426 or PCIe2-425 Power Requirements
* The PCIe-426 and PCIe2-425 does not use +12V
5.5 PCIe2-436/439 UPSTREAM ADAPTER CARDS
The PCIe2-436 adapts the PCIe2-462 expansion backplane to a x16 cable. The PCIe2-439 adapts the
backplane to a x8 cable. The cards are low profile and can be shipped with a low profile end panel or a
standard height end panel. These cards are designed to only be used in "upstream" slots on Cyclone
Microsystems backplanes.
Voltage Current Typical Current Maximum
+3.3V 1.09 Amps 1.60 Amps
+12V 0 Amps 0 Amps

PCIE2-425/PCIE2-426 AND PCIE2-439/PCIE2-436
5-2 PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
Revision 1.0, February 2015
5.5.1 PCIe2-436/439 LEDs
The bottom (or left) LED on the front panel is the "Cable Present Detect" LED. This green LED reflects
the status of the "CPRSNT#" signal in the PCIe Expansion Cable. When the LED is ON, it is indicating
that the "CPRSNT#" signal is asserted. The chassis asserts "CPRSNT#" to indicate that it is present, the
cable is connected, and power is good. If this LED is OFF, there may be a problem with +3.3V power in
the expansion chassis or the PCIe Expansion Cable is not connected properly.
The top (or right) LED on the panel is a "PCIe Link Indicator". This yellow LED is ON solid when all
cable lanes used and are operating at Gen2 rates. A cable link running at Gen1 rates and/or using less
lanes than available will indicate status with a blinking LED. The blinking pattern is the same as the slot
indicators, see Table 4-2
5.5.2 MECHANICAL
The PCIe2-436 and PCIe2-439 are low profile PCI Express form factor upstream cards and are
available with either a standard height front panel or a low profile front panel. For the PCIe2-436, see
Figure 5-4 for a mechanical drawing of the card and Figure 5-3 for a front panel drawing. For the
PCIe2-439, see Figure 5-8 for a mechanical drawing of the card and Figure 5-7 for a front panel
drawing.
5.5.3 PCIe2-436/439 Output Swing, De-Emphasis and Receive Equalization
The transceiver silicon used on the PCIe2-436/439 has eight steps of programmable de-emphasis, four
steps of output swing and eight steps of receive equalization. The as-shipped-default configuration of
the transceiver silicon is what Cyclone Microsystems has determined is the best setting for Gen2
operation with both 1m and 3m PCIe cables shipped with Cyclone PCIe Expansion systems. This
configuration will also function adequately for Gen1 operation.