Adnacom S31 User manual

Adnacom Inc.
200 - 5050 Kingsway
Burnaby, BC V5H 4H2, Canada
https://adnacom.com/
Adnacom S31 64 Gb/s
PCI Express Over Fiber Optic System
User’s Guide

S31 64 Gb/s PCIe Over Fiber Optic System User’s Guide
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Contents
User’s Guide.......................................................................................................................................................................................... 1
1Terminology............................................................................................................................................................................... 5
2Applicable and Reference Documents............................................................................................................................ 6
2.1 Reference Documents..................................................................................................................................................... 6
2.2 Applicable Documents.................................................................................................................................................... 6
3System Description ................................................................................................................................................................. 7
3.1 Overview............................................................................................................................................................................... 7
3.2 Recommended Transceivers and Cables................................................................................................................. 8
3.2.1 Active Optical Cables ............................................................................................................................................ 8
3.2.2 Optical Transceivers............................................................................................................................................... 9
3.2.3 LC-LC Cables............................................................................................................................................................. 9
3.2.4 Direct Attach Cables.............................................................................................................................................. 9
4System Operation..................................................................................................................................................................10
4.1 Slot Configuration ..........................................................................................................................................................10
4.1.1 Supported Configurations by DIP Switch...................................................................................................10
4.1.2 Supported Configurations by Configuration Page .................................................................................10
4.2 Power Modes....................................................................................................................................................................11
4.2.1 S31 Power-ON/OFF Modes..............................................................................................................................11
4.2.2 Manual Power-ON/OFF Sequence (Modes 1 and 2) .............................................................................11
4.2.3 Automatic Power-ON/OFF Sequence (Mode 3) ......................................................................................11
4.3 Fan Configuration...........................................................................................................................................................11
5System Installation ................................................................................................................................................................12
5.1 Installation Recommendations..................................................................................................................................12
5.2 Preparing Your Computer ...........................................................................................................................................12
5.3 Power Supply Minimum Load Requirements......................................................................................................12
5.4 Installing H18 Host Adapter Card ............................................................................................................................12
5.5 Installing R34 Backplane ..............................................................................................................................................13
5.6 Installing User’s PCIe Cards into R34 Backplane................................................................................................13
5.7 Installing QSFP Transceivers and Connecting Fiber Optic Cables ..............................................................13
5.8 Turning on the System for the First Time .............................................................................................................15
6Verifying System Functionality .........................................................................................................................................16
7H18 PCIe Host Adapter .......................................................................................................................................................20
7.1 H18 Drawing .....................................................................................................................................................................20
7.2 H18 Cable Interface .......................................................................................................................................................20
7.3 H18 S1 DIP Switch Description..................................................................................................................................20
7.4 H18 LEDs Description....................................................................................................................................................21

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7.5 H18 Connectors Description ......................................................................................................................................22
8R34 PCIe Backplane ..............................................................................................................................................................23
8.1 R34 Drawing......................................................................................................................................................................23
8.2 R34 S1 DIP Switch Description ..................................................................................................................................24
8.3 R34 LEDs Description ....................................................................................................................................................25
8.4 R34 Buttons Description ..............................................................................................................................................26
8.5 R34 Connectors Description.......................................................................................................................................26
9Web Interface..........................................................................................................................................................................29
9.1 Overview.............................................................................................................................................................................29
9.2 IP Address Configuration.............................................................................................................................................29
9.2.1Default IP Address: S1.8 = OFF.......................................................................................................................29
9.2.2 User’s IP Address: S1.8 = ON...........................................................................................................................29
9.3 H18 Web Site IP: 192.168.100.101 ...........................................................................................................................31
9.3.1 Overview ..................................................................................................................................................................31
9.3.2 Status Page .............................................................................................................................................................31
9.3.2.1 Configuration ...........................................................................................................................................31
9.3.2.2 Status...........................................................................................................................................................32
9.4 R34 Web Site IP: 192.168.100.102............................................................................................................................35
9.4.1 Overview ..................................................................................................................................................................35
9.4.2 Status Page .............................................................................................................................................................35
9.4.2.1 Configuration ...........................................................................................................................................35
9.4.2.2 Status...........................................................................................................................................................36
9.4.3 Backplane Configuration Page........................................................................................................................39
9.4.3.1 Slot Configuration..................................................................................................................................39
9.4.3.2 Fan Configuration...................................................................................................................................39
9.4.3.3 Fan Test.......................................................................................................................................................40
10 Troubleshooting.....................................................................................................................................................................41
10.1 Overview.............................................................................................................................................................................41
10.2 System Context Diagram .............................................................................................................................................41
10.3 Troubleshooting Algorithm ........................................................................................................................................41
10.3.1 Identify Problem ...................................................................................................................................................41
10.3.2 Review Operating and Installation Instructions.......................................................................................42
10.3.3 Verify Computer and Add-in Card ................................................................................................................42
10.3.4 Verify H18 Host Adapter ...................................................................................................................................42
10.3.5 Verify QSFP Cable.................................................................................................................................................42
10.3.6 Verify R34 Backplane ..........................................................................................................................................42
10.3.7 Verify Add-in Card ...............................................................................................................................................43
10.4 Operating and Performance Problems ..................................................................................................................43

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10.5 Cable Problems................................................................................................................................................................43
10.6 R34 Automatic Power ON/OFF Problems.............................................................................................................43
11 Products Design Disclaimer...............................................................................................................................................44
12 Customer Support .................................................................................................................................................................45
13 Warranty....................................................................................................................................................................................46

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1Terminology
Table 1-1. Common terms used in the user’s guide.
Term
Description
Add-in card
A card that is plugged into a connector and mounted in a chassis
AOC
Active optical cable
ATX
A system board form factor. Refer to the ATX Specification
xN
A Link with “N”Lanes.
DAC
Direct attach cable
Downstream
The Ports on a Switch that are not the Upstream Port are Downstream Ports.
EMI
Electromagnetic Interference
ESD
Electrostatic Discharge
Gb/s
Gigabit per second
GT/s
Gigatransfers per second
Gen 1
PCIe 2.5 GT/s
Gen 2
PCIe 5 GT/s, backward compatible with Gen 1
Gen 3
PCIe 8 GT/s, backward compatible with Gen 1 and Gen 2
Lane
A set of differential signal pairs, one pair for transmission and one pair for
reception. A by-N Link is composed of N Lanes
Link
The collection of two Ports and their interconnecting Lanes. A Link is a dual-
simplex communications path between two components.
microATX
A system board form factor. Refer to the microATX Specification
NC
Not connected
OS
Operating system
PCIe
Interconnect standard for PCI Express cards
Port
Logically, an interface between a component and a PCI Express Link
QSFP
Quad Small Form-factor Pluggable
PCIe Switch
A device that connects two or more Ports to allow PCIe packets to be routed
from one Port to another
RMA
Return Material Authorization
Root Complex
A device that connects the processor and memory subsystem to the PCI
Express switches and devices
Upstream
The Port on a Switch that is closest topologically to the Root Complex is the
Upstream Port

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2Applicable and Reference Documents
2.1 Reference Documents
RD-1: H18 Datasheet. Adnacom Inc., https://adnacom.com.
RD-2: R34 Datasheet. Adnacom Inc., https://adnacom.com.
2.2 Applicable Documents
AD-1: PCI Express Base Specification, Revision 3.0. PCI-SIG, http://www.pcisig.com.
AD-2: PCI Express Card Electromechanical Specification, Revision 3.0. PCI-SIG, http://www.pcisig.com.
AD-3: SFF-8436. QSFP+ 4x 10 Gb/s Pluggable Transceiver, Revision 4.9. SFF Committee.
AD-4: Design Guide for Desktop Platform Form Factors, Revision 002. Intel Corporation.

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3System Description
3.1 Overview
The Adnacom S31 is a multi-lane PCI Express Gen 3 extension system. The system consists of the
Adnacom-H18 host adapter and Adnacom-R34 backplane connected by one or two cables. The
system can operate with one or two QSFP transceivers, active optical cables (AOCs), or direct attach
cables (DACs). The system’s diagrams are shown in Figure 3-1 and Figure 3-2.
Figure 3-1. H18 One Port x8.
Figure 3-2. H18 Two Ports x4.
Gen 3 PCI
Express
Switch
Gen 3 PCI
Express
Switch
Gen 3 PCIe x8
QSFP 1
QSFP 2
PCIe Lane 0-3
PCIe Lane 4-7
PCIe slot
PCIe x8 or x16 slot COMPUTER
PCIe slot
PCIe slot
PCIe slot
PCIe
PCIe
PCIe
PCIe
PCIe Lane 0-3 QSFP 1
QSFP 2
PCIe Lane 4-7
H18
PCIe x8
Port 1
Port 0
Port 1
Port 2
Port 4
Port 5
Port 0
R34
64 Gb/s
Gen 3 PCI
Express
Switch
Gen 3 PCI
Express
Switch
Gen 3 PCIe x8
QSFP 1
QSFP 2
PCIe Lane 0-3 PCIe slot
PCIe x8 or x16 slot COMPUTER
PCIe slot
PCIe slot
PCIe slot
PCIe
PCIe
PCIe
PCIe
PCIe Lane 0-3 QSFP 1
QSFP 2
PCIe Lane 0-3
H18
PCIe x8
Port 1
Port 1
Port 2
Port 4
Port 5
Port 0 R34
Gen 3 PCI
Express
Switch
QSFP 1
QSFP 2
PCIe Lane 0-3 PCIe slot
PCIe slot
PCIe slot
PCIe slot
PCIe
PCIe
PCIe
PCIe
Port 1
Port 2
Port 4
Port 5
R34
Port 2
Port 0
Port 0
32 Gb/s
32 Gb/s

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The Adnacom S31 allows system integrators to operate PCIe cards at long distances from the location
of the computer system via a fiber optic cable with a maximum throughput of 64 Gb/s. No additional
host software drivers are required during installation or operation.
The R34 PCIe slots support bifurcation. The supported configurations are shown in Table 3-1 and
Table 3-2.
Table 3-1. S1 and S2 Slot Supported Configurations.
Slot 1
Slot 2
1 port x4
1 port x4
1 port x8
Disabled
2 port x4
Disabled
Table 3-2. S3 and S4 Slot Supported Configurations.
Slot 3
Slot 4
1 port x8
1 port x8
1 port x8
2 ports x4
1 port x16
Disabled
2 port x8
Disabled
2 ports x4
2 ports x4
4 ports x4
Disabled
The use of fiber optics provides electrical isolation and the ability to use long cables. The system
integrators can use the system in applications where equipment operates in harsh environmental
conditions or must be isolated from the host computer. The expansion system is transparent to
software applications and drivers so that industry-standard desktop computers and servers can
communicate with remote devices with no additional programming.
3.2 Recommended Transceivers and Cables
For information on tested cable lengths and measured data transfer rates, please visit the S31
product webpage: https://adnacom/s31/.
3.2.1 Active Optical Cables
Table 3-3. Tested AOC.
Manufacturer
Part Number
Description
Finisar
FCCN410QD3C10
Reliable operation.
Fiber Store
QSFP-AO10
Reliable operation.
Others
Not all cables may work reliably. Adnacom recommends
testing cables using the web interface described in
section 9. The web interface helps to debug and identify
problems with the cable link.

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3.2.2 Optical Transceivers
The S31 can operate with standard multi-mode and single-mode QSFP transceivers. The transceivers
should consume less than 1.5 W to keep their temperature within recommended operating
conditions. If transceivers consume more than 1.5 W, it is recommended to install heatsinks on the
QSFP cages. The transceiver’s power consumption and case temperature can be verified using the
web interface described in section 9.
Table 3-4. Tested Transceivers.
Manufacturer
Part Number
Description
Finisar
FTL4C1QL2C
Reliable operation.
Fiber Store
QSFP-LX4-40G
Reliable operation.
10Gtek
ALQ10-IR4-02
ALQ10-LR4-10
Reliable operation.
3.2.3 LC-LC Cables
Multi-mode and single-mode LC-LC duplex cables can be used with single-mode QSFP transceivers
with LC connectors. The QSFP transceivers multiplex and demultiplex 4 PCIe Gen 3 lanes into a single
LC-LC duplex cable using Coarse Wavelength Division Multiplexing (CWDM). A single LC-LC duplex
cable supports a 32 Gb/s data rate. The recommended multi-mode cable types are OM3 and OM4.
The recommended maximum cable lengths for different cable types are shown in Table 3-5. The
system performance depends on the cable length. For further information, visit
https://adnacom.com/s31/.
Table 3-5. Recommended Maximum Length for LC-LC Cables.
Cable Type
Typical Length
Multi-Mode OM1 62.5/125 µm
40 m
Multi-Mode OM2 50/125 µm
100 m
Multi-Mode OM3 50/125 µm
350 m
Multi-Mode OM4 50/125 µm
550 m
Single-Mode OS1 9/125 µm
1 km
Single-Mode OS2 9/125 µm
1 km
3.2.4 Direct Attach Cables
Table 3-6. Tested DAC.
Manufacturer
Part Number
Description
3M
9QA0-111-12-3.00
Reliable operation.

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4System Operation
4.1 Slot Configuration
The R34 slots can be configured using the S1.1 and S1.2 DIP switches or the web configuration page
described in section 9.4.3. The type of configuration control is selected on the configuration page.
When the R34 is ON, the status LED D15 indicates the type of slot configuration:
•D15 is OFF: The slot configuration is controlled by the S1.1 and S1.2 DIP switches
•D15 is ON: The slot configuration is controlled by the settings on the configuration page
described in section 9.4.3.
4.1.1 Supported Configurations by DIP Switch
Table 4-1. S1 and S2 Slots Configurations.
S1.1
Slot 1
Slot 2
OFF
1 port x4
1 port x4
ON
1 port x8
Disabled
Table 4-2. S3 and S4 Slots Configurations.
S1.2
Slot 1
Slot 2
OFF
1 port x8
1 port x8
ON
1 port x16
Disabled
4.1.2 Supported Configurations by Configuration Page
Table 4-3. S1 and S2 Slots Configurations.
Slot 1
Slot 2
1 port x4
1 port x4
1 port x8
Disabled
2 port x4
Disabled
Table 4-4. S3 and S4 Slots Configurations.
Slot 3
Slot 4
1 port x8
1 port x8
1 port x8
2 ports x4
1 port x16
Disabled
2 port x8
Disabled
2 ports x4
2 ports x4
4 ports x4
Disabled

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4.2 Power Modes
4.2.1 S31 Power-ON/OFF Modes
The R34 can turn ON and OFF a standard computer power supply. The R34 can operate in one of
three power control modes.
Table 4-5. R34 Power Control Modes.
Mode
S1.3
S1.4
Description
1
OFF
OFF
Power ON and OFF is controlled by the momentary button
SW6, or an external momentary switch connected to J9
pins 2 and 4
2
ON
OFF
The power supply and R34 are always ON
This mode is used with a custom power supply
3
OFF
ON
Power is turned ON and OFF automatically when the
computer is turned ON and OFF
Note: Disconnection of the fiber optic cable with the system powered ON requires a Power-ON/OFF
sequence to resume operation.
4.2.2 Manual Power-ON/OFF Sequence (Modes 1 and 2)
Power-On Sequence
•Power on the R34.
•Power on the host computer.
Power-Off Sequence
•Power off the host computer.
•Power off the R34.
4.2.3 Automatic Power-ON/OFF Sequence (Mode 3)
Mode 3 can be used only with an optical cable and a standard computer power supply or a
power supply with a 5V standby voltage and a PS_ON# signal. After installing the system, connect
the power cord and switch ON the power switch on the R34 power supply to provide standby power
to the R34. In this mode, the power sequence is controlled automatically. When the computer is
turned ON or OFF, the R34 is turned ON or OFF automatically.
4.3 Fan Configuration
The speed of the fans can be configured if the fans have the PWM control signal on the 4-wire
connector. The fan profiles are selected on the configuration page described in section 9.4.3.

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5System Installation
5.1 Installation Recommendations
It is highly recommended to update your computer’s BIOS and OS. The latest BIOS update and its
installation instructions can be downloaded from the computer or motherboard manufacturer’s
website. If a BIOS update does not solve installation issues, further diagnostics may be required. The
system may be installed on a different computer to verify Adnacom S31 functionality.
ESD Warning: The electronic parts are sensitive to electrostatic discharges. Please
use an electrostatic wrist strap and/or conductive mat when executing the steps
below.
5.2 Preparing Your Computer
•The system does not support overclocking. Please make sure that the PCI Express clock
frequency is set to either the default value or 100 MHz in the BIOS.
•The optical transceivers used in the system do not support PCI Express link power
management. Therefore, it is recommended to disable all power management features on
the computer. The step-by-step instructions for Windows 7, 8, and 10 can be found on the
https://adnacom.com/s31 page. For other operating systems, please consult your OS
documentation, or if you need additional assistance, please contact the OS vendor.
5.3 Power Supply Minimum Load Requirements
•The R34 backplane is designed to be powered by a standard computer power supply. Many
computer power supplies require a minimum load to provide a stable output voltage and, in
some cases, may not even turn on. If the installed add-in cards do not consume enough
power for stable power supply operation, an additional load can be added by connecting
chassis fans or a load resistor to the power supply.
5.4 Installing H18 Host Adapter Card
•Power off the host computer and unplug its power cord.
•Remove the computer’s cover.
•Identify any PCIe x8 or x16 slot on the motherboard.
•Configure the H18 using the DIP switch settings described in Table 7-2.
•Remove the metal bracket for the slot you have selected. Keep both the bracket cover and
the retaining screw.
•Insert the H18 card into the identified PCIe slot by pushing gently on the card. Secure the
card to the computer chassis using the retaining screw.
•There should be sufficient airflow to keep the PCIe switch temperature below the maximum
limit. The temperature can be verified using the web interface described in section 9.
•Connect the power cord and verify that the red standby LED is ON when the computer is
OFF. If the standby LED is OFF, it indicates that there is no +3.3Vaux voltage on the PCI slots.
Check the BIOS settings to enable the voltage or reset the BIOS settings to the default values.
In DELL computers, +3.3Vaux is enabled by setting BIOS Settings->Power Management->
Deep Sleep Control->Disabled.

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5.5 Installing R34 Backplane
•The R34 may be mounted in any microATX or ATX case.
•Connect the main power supply cable (20 or 24 pin connector) to the R34 J8 connector.
•Additional power may be supplied via the J10 and J11 connectors.
•If necessary, connect an additional load to the power supply as described in section
5.3 Power Supply Minimum Load Requirements.
•Set up the power control mode on the R34 as described in 4 System Operation.
•Configure the R34 using the DIP switch settings described in Table 8-1 or the configuration
page described in section 9.4.3.
•There should be sufficient airflow to keep the PCIe switch temperature below the maximum
limit. The temperature can be verified using the web interface described in section 9. If the
installed fans have the PWM signal, then their profile can be selected on the configuration
page described in section 9.4.3.
5.6 Installing User’s PCIe Cards into R34 Backplane
•Follow the recommendations and procedures provided by the card manufacturer for
installation into standard computer slots.
•Install the user’s cards into the J1–J4 slots on the R34. Make sure that the slots are enabled
in the configuration selected by the S1.1 and S1.2 switches.
5.7 Installing QSFP Transceivers and Connecting Fiber Optic Cables
•When the H18 is configured in the one-port x8 mode, the QSFP 1 must be connected. If the
QSFP 2 is not used, it is recommended to remove the transceiver to prevent link training
failure.
•When the H18 is configured in the two-port x4 mode, the QSFP 1 and QSFP 2 can be used
in any combination.
•The QSFP 1 on the R34 must be connected. If QSFP 2 is not used, it is recommended to
remove the transceiver to prevent link training failure.
•In the one-port x8 mode, both cables must have the same length and be of the same type.
Table 5-1. Valid Cable Connections.
H18 Cable Port
Number of QSFPs
Connection
One port x8
2
See Figure 5-1
H18 QSFP 1 to R34 QSFP 1
H18 QSFP 2 to R34 QSFP 2
1
See Figure 5-2
H18 QSFP 1 to R34 QSFP 1
Unplug unused transceivers and cables from the
QSFP 2 connectors on the H18 and R34.
Two ports x4
2
See Figure 5-3
H18 QSFP 1 to R34 1 QSFP 1
H18 QSFP 2 to R34 2 QSFP 1
1
See Figure 5-3
H18 QSFP 1 to R34 QSFP 1 or
H18 QSFP 2 to R34 QSFP 1

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Figure 5-1. H18 One Cable Port x8 with Two Cables.
Figure 5-2. H18 One Cable Port x8 with One Cable.
Gen 3 PCI
Express
Switch
QSFP 1
QSFP 2
PCIe slot 1
PCIe slot 2
PCIe slot 4
PCIe slot 3
H18
PCIe x8
64 Gb/s
QSFP 1
QSFP 2
R34
Gen 3 PCI
Express
Switch
S1.1=OFF 1 Port x8
Gen 3 PCI
Express
Switch
QSFP 1
QSFP 2
PCIe slot 1
PCIe slot 2
PCIe slot 4
PCIe slot 3
H18
PCIe x8
QSFP 1
QSFP 2
R34
Gen 3 PCI
Express
Switch
S1.1=OFF 1 Port x8 32 Gb/s

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Figure 5-3. H18 Two Cable Ports x4 with Two Cables.
5.8 Turning on the System for the First Time
•Power on the system, as indicated in 4 System Operation.
•The system operating status can be verified using the web interface described in section 9.
Gen 3 PCI
Express
Switch
QSFP 1
QSFP 2
PCIe slot 1
PCIe slot 2
PCIe slot 4
PCIe slot 3
H18
PCIe x8
QSFP 1
QSFP 2
R34
Gen 3 PCI
Express
Switch
S1.1=ON 2 Ports x4
32 Gb/s
Gen 3 PCI
Express
Switch
QSFP 1
QSFP 2
PCIe slot 1
PCIe slot 2
PCIe slot 4
PCIe slot 3
R34
32 Gb/s

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6Verifying System Functionality
To verify a successful installation, use the Device Manager. In the Device Manager, click on the
View menu and select View Devices by Connection.
Figure 6-1. Device Manager.

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To see if your installation is successful, click on the arrow to the left of the ACPI to open it, then
within PCI Bus, check the lines containing the words “PCI Express Root”or “PCI standard PCI-to-
PCI bridge.” Under one of the lines, you should see multiple PCI-to-PCI bridges and your add-in
card. Figure 6-2 shows the H18 and R34 cards.
Figure 6-2. S31 System View in Device Manager.

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Right-click on the “PCI standard PCI-to-PCI bridge”line you want to view, then click Properties.
On the Details tab, you can verify a vendor and the device ID of the selected device.
All Adnacom H18 and R34 boards have the Vendor ID =10B5. The H18 Device ID is 8718, and the
R34 Device ID is 8734, as shown in Figure 6-3 and Figure 6-4, respectively.
Figure 6-3. H18 Hardware IDs.

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Figure 6-4. R34 Hardware IDs.
If the installation was unsuccessful, please go to 10 Troubleshooting.

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7H18 PCIe Host Adapter
7.1 H18 Drawing
Figure 7-1. H18 Drawing.
7.2 H18 Cable Interface
Table 7-1. H18 PCIe Cable Interface.
Number of
Ports
Port
Number
Port Width
PCIe Lanes
QSFP
QSFP
TX/RX
1
1
x8
0-3
1
1-4
4-7
2
1-4
2
1
x4
0-3
1
1-4
2
x4
0-3
2
1-4
4
1
x2
0-1
1
1-2
2
x2
0-1
3-4
3
x2
0-1
2
1-2
4
x2
0-1
3-4
7.3 H18 S1 DIP Switch Description
Table 7-2. H18 DIP Switch.
Switch
Description
Default
1
2
Cable Interface Configuration
S1.1
S1.2
Configuration
OFF
OFF
1 port x8
ON
OFF
2 ports x4
OFF
ON
4 ports x2 (2 ports per QSFP)
ON
ON
Reserved
Note: 4 ports x2 configuration is not used with the R34 backplane.
OFF
OFF