schroff Nvent 3U 2-slot ATCA Shelf User manual

3U 2-slot ATCA Shelf
User‘s Manual
Product Numbers:
11990-704/-705/-706/-707
Doc-No: 63972-320_R1.2 March 2018

Impressum:
Schroff GmbH

Langenalber Str. 96 - 100
75334 Straubenhardt, Germany
The details in this manual have been carefully compiled and
checked - supported by certified Quality Management System
to EN ISO 9001/2000
The company cannot accept any liability for errors or misprints.
The company reserves the right to amendments of technical
specifications due to further development and improvement of
products.
Copyright2018
All rights and technical modifications reserved.
R1.0 March 2018 rebranded

11990-704/705/706/707 (2-Slot ATCA Shelf)
I R1.2, March 2018
Table of Contents
1 Safety .................................................................................................................................... 1
1.1 Safety Symbols used in this document ........................................................................... 1
1.2 General Safety Precautions................................................................................................ 1
1.3 References and Architecture Specifications................................................................... 2
1.4 Product Definition ................................................................................................................ 2
1.5 Terms and Acronyms.......................................................................................................... 3
1.6 Hardware Platform .............................................................................................................. 4
2 Shelf Front and Rear View................................................................................................. 5
3 ATCA Backplane ................................................................................................................. 6
3.1 Logical to Physical Slot Mapping...................................................................................... 6
3.2 Interfaces............................................................................................................................... 6
3.2.1 Fabric Interface .................................................................................................... 6
3.2.2 Synchronization Clock Interface ....................................................................... 6
3.2.3 Update Channel Interface................................................................................... 6
3.2.4 Intelligent Platform Management Interface.................................................... 6
3.2.5 Base Interface....................................................................................................... 7
3.3 Shelf FRU SEEPROM ........................................................................................................... 8
3.4 Logic Ground......................................................................................................................... 8
4 Air Filter................................................................................................................................. 9
4.1 Introduction........................................................................................................................... 9
5 Shelf Ground Connection ................................................................................................ 10
5.1 Specification for the Shelf Ground connection cable.................................................. 10
6 Shelf Alarm Panel (optional)........................................................................................... 11
6.1 SAP Front Panel.................................................................................................................. 11
7 Fan Trays............................................................................................................................ 12
7.1 IPM Controller and Fan Control....................................................................................... 13
7.2 Fan Tray Indicators............................................................................................................ 14
7.3 Fan Tray Signals................................................................................................................. 15
7.4 Fan Tray Connector Pin Assignment ............................................................................. 15
7.5 Fan Tray IPMB Addresses................................................................................................ 15
7.6 Front Board Air Distribution.............................................................................................. 16
7.7 Rear Board Air Distribution............................................................................................... 16
8 Power .................................................................................................................................. 17
8.1 AC PEM ................................................................................................................................ 17
8.1.1 AC PEM Power Distribution ............................................................................. 18
8.1.2 AC PEM Signals.................................................................................................. 19
8.1.3 AC PEM Indicators............................................................................................. 19
8.1.4 AC PEM Connector PIN Assignment ............................................................. 19
8.2 DC PEM ................................................................................................................................ 20

11990-704/705/706/707 (2-Slot ATCA Shelf)
II R1.2, March 2018
8.2.1 DC PEM Power Distribution ............................................................................. 21
8.2.2 DC PEM Signals.................................................................................................. 21
8.2.3 DC PEM Indicators............................................................................................. 22
8.2.4 Specification for the power connection cables............................................ 22
8.2.5 DC PEM Connector PIN Assignment ............................................................. 22
9 Shelf Management ........................................................................................................... 23
9.1 Shelf Managers................................................................................................................... 24
9.2 Introduction......................................................................................................................... 24
9.3 Front Panel Components.................................................................................................. 26
9.4 Hardware Address ............................................................................................................. 26
10 Technical Data................................................................................................................... 27
10.1 Accessories......................................................................................................................... 28
10.2 Shelf Dimensions ............................................................................................................... 29

11990-704/705/706/707 (2-Slot ATCA Shelf)
Safety 1 R1.2, March 2018
1 Safety
The intended audience of this User’s Manual is system integrators and hardware/software
engineers.
1.1 Safety Symbols used in this document
1.2 General Safety Precautions
• Service personnel must know the necessary electrical safety, wiring and connection prac-
tices for installing this equipment.
• Install this equipment only in compliance with local and national electrical codes.
• For additional information about this equipment, see the PICMG 3.0 
Specification (www.picmg.com).
Hazardous voltage!
This is the electrical hazard symbol. It indicates that there are dangerous voltages inside the
Shelf.
Caution!
This is the user caution symbol. It indicates a condition where damage of the equipment or
injury of the service personnel could occur. To reduce the risk of damage or injury, follow all
steps or procedures as instructed.
Danger of electrostatic discharge!
The Shelf contains static sensitive devices. To prevent static damage you must wear an ESD
wrist strap.
Warning!
Voltages over 60 VDC can be present in this equipment. As defined in the PICMG 3.0 Speci-
fication, this equipment is intended to be accessed, to be installed and maintained by 
qualified and trained service personnel only.

11990-704/705/706/707 (2-Slot ATCA Shelf)
Safety 2 R1.2, March 2018
1.3 References and Architecture Specifications
• User Manual Shelf Manager ACB-V, order-no.: 63972-243
• User Manual Shelf Alarm Panel, order-no.: 63972-230
• Pigeon Point Systems IPM Sentry Shelf-External Interface Reference
(www.pigeonpoint.com)
•PICMG
®3.0 Revision 3.0 AdvancedTCA® Base Specification
(www.picmg.com)
1.4 Product Definition
The Schroff 11990-704/ -705/ -706/ -707 are 3 U / 2 Slot AdvancedTCA Shelves for Enterprise
or Development applications. Different versions are available:
•11990-704: Base Interface in a Hub/Hub configuration supporting ShMC cross connects,
dedicated slots for two Schroff ACB-V Shelf Managers and one Shelf Alarm Panel (SAP),
fans controlled by the Shelf Manager or through autonomous fan controller, DC Power
Entry Module.
•11990-705: Base Interface in a Hub/Hub configuration supporting ShMC cross connects,
dedicated slots for two Schroff ACB-V Shelf Managers and one Shelf Alarm Panel (SAP),
fans controlled by the Shelf Manager or through autonomous fan controller, AC Power
Entry Module.
•11990-706: Base Interface in a Node/Node configuration, dedicated slots for two Schroff
ACB-V Shelf Managers and one Shelf Alarm Panel (SAP), fans controlled by the Shelf Man-
ager or through autonomous fan controller, DC Power Entry Module.
•11990-707: Base Interface in a Node/Node configuration, dedicated slots for two Schroff
ACB-V Shelf Managers and one Shelf Alarm Panel (SAP), fans controlled by the Shelf Man-
ager or through autonomous fan controller, AC Power Entry Module.

11990-704/705/706/707 (2-Slot ATCA Shelf)
Safety 3 R1.2, March 2018
1.5 Terms and Acronyms
Table 1: Terms and Acronyms
Term Definition
ATCA Advanced Telecom Computing Architecture
Backplane Passive circuit board providing the connectors for the front boards. Power distribution, management and
auxiliary signal connections are supported
CDM Shelf FRU Data Module
ECN Engineering Change Notice
ESD Electrostatic Discharge
ETSI European Telecommunications Standards Institute
FRU Field Replaceable Unit
IPMB Intelligent Platform Management Bus
IPMC Intelligent Platform Management Controller
IPMI Intelligent Platform Management Interface
PCB Printed Circuit Board
PEM Power Entry Module
RTC Real Time Clock
RTM Rear Transition Module
Shelf Enclosure containing subrack, Backplane, boards, cooling devices, PEMs and Fan Trays
VRTN Voltage Return

11990-704/705/706/707 (2-Slot ATCA Shelf)
Safety 4 R1.2, March 2018
1.6 Hardware Platform
The Shelf is 3 U high and 19“ rack mountable. The chassis is designed for easy access of any
Field Replaceable Units (FRU).
• 2 slot ATCA Backplane with 15 x interconnected Fabric Interface, Base Interface in HUB/
HUB or NODE/NODE configuration, bused IPMB interface, supporting two 8 U ATCA hub
boards or node boards (depending on chassis/backplane type)
• Mounting brackets for 19“ racks
• ESD Wrist Strap Terminals at front and rear
• Two dedicated slots for a Schroff Shelf Manager based on Pigeon Point ShMM-500
• One dedicated slot for a Schroff Shelf Alarm Panel (SAP) that provides Telco Alarm inter-
face, Alarm Status LEDs and serial interface for the Shelf Manager
• Two Front pluggable Fan Trays with 5 high speed fans per tray
• Removable air filter that meets the requirements of the Telcordia GR-78-CORE specifica-
tion.
• Two rear pluggable AC- or DC-Power Entry Modules, the same interface in the subrack for
AC PEM and DC PEM.
• Front pluggable air inlet filter

11990-704/705/706/707 (2-Slot ATCA Shelf)
Shelf Front and Rear View 5 R1.2, March 2018
2 Shelf Front and Rear View
Figure 1: Shelf Front View
12713801
1Shelf Manager 1 8DC PEM B
2Fan Tray 1 9Shelf Ground Terminal
3Shelf Alarm Panel (SAP) 10 DC PEM A
4ESD Wrist Strap Terminal 11 ESD Wrist Strap Terminal
5Shelf Manager 2 12 AC PEM B
6Fan Tray 2 13 AC PEM A
7Air Filter

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ATCA Backplane 6 R1.2, March 2018
3 ATCA Backplane
The 2-slot ATCA monolithic Backplane is completely passive and is not A Field Replaceable
Unifield replaceable. The backplane provides 40Gb/s connectivity (4 lanes with 10Gb/s) and
2 ATCA slots in a:
•Hub/Hub configuration (Backplane 90183-490) or
•Node/Node configuration (Backplane 90183-491)
3.1 Logical to Physical Slot Mapping
The physical and logical slots are sequentially numbered from the lower to the upper slot.
Table 2: 2-Slot ATCA Backplane physical to logical slot mapping
3.2 Interfaces
3.2.1 Fabric Interface
All 15 Fabric Channels of slot 1 are routed to the respective Fabric Channels of slot 2.
3.2.2 Synchronization Clock Interface
6 pairs of synchronization clocks are bused between both ATCA slots and terminated at both
ends.
3.2.3 Update Channel Interface
The Update Channels are wired between both ATCA slots. The Update Channel can be used
to pass data or routing information between two redundant ATCA Boards.
3.2.4 Intelligent Platform Management Interface
The Shelf uses an Intelligent Platform Management Bus (IPMB) for management
communications among all ATCA Boards. The reliability of the IPMB is improved by the
addition of a second IPMB, with the two IPMBs referenced as IPMB-A and IPMB-B.
The IPMB-A and IPMB-B are routed between the ATCA slots.
Physical Slot # Logical Slot # HW-Address
(Hex)
IPMB-Address
(Hex)
Update
Channel
2 2 42 84
1 1 41 82

11990-704/705/706/707 (2-Slot ATCA Shelf)
ATCA Backplane 7 R1.2, March 2018
3.2.5 Base Interface
Node/Node configuration
11990-706/11990-707 with Backplane 90183491:
All 16 Base Channels of slot 1 are routed to the respective Base Channels of
slot 2.
Hub/Hub configuration
11990-704/11990-705 with Backplane 90183490:
All Base Channels 2 - 16 of slot 1 are routed to the respective Base Channels of
slot 2. Base Channel 1 (ShMC) of slot 1 and 2 is cross connected to both dedicated Shelf
Manager slots.
Figure 2: Backplane Topology
12713804

11990-704/705/706/707 (2-Slot ATCA Shelf)
ATCA Backplane 8 R1.2, March 2018
3.3 Shelf FRU SEEPROM
2 Shelf FRU SEEPROMS are located on the Backplane. The hardware address for these
SEEPROMs is 0xA4.
The SEEPROMs are the repository of the shelf specific information capabilities of the system
and other user configurable options. The SEEPROMs contain the list of which slots are
connected together, how the update channels are routed, how many slots are in the system,
what the maximum power is to each slot, serial number of the shelf, backplane topology, etc.
The Shelf Manager uses this information to provide functions such as electronic keying,
controlling the power state of the system, etc.
The Shelf allows for 2 methods to access the chassis FRU data:
• An I2C connection from each Shelf Manager directly to the SEEPROMs on the backplane.
• SEEPROMs on the backplane exposed as a FRU of the Fan Tray.
3.4 Logic Ground
Figure 3: Logic Ground
The ATCA backplane provides a mechanism to connect Logic Ground and Shelf Ground. The
backplane fixing screw (arrow) is isolated by a plastic washer. To connect Logic Ground and
Shelf Ground remove the screw, remove the plastic washer and re-install the screw.
12713814
The default factory assembly isolates Logic Ground from Shelf Ground.

11990-704/705/706/707 (2-Slot ATCA Shelf)
Air Filter 9 R1.2, March 2018
4 Air Filter
Figure 4: Air Filter
4.1 Introduction
The ATCA Shelf provides a front replaceable air filter. The filter element is an open cell
polyurethane foam specially coated to provide improved fire retardation and fungi
resistance. It features deep loading, large dust holding capacity, low air resistance, and
complies with NEBS-GR-63-CORE.
There is a switch to detect whether an air filter is installed. This switch is exposed to the Shelf
manager as a presence sensor on the Fan Tray.
12713811
1Air Filter 2Filter Element

11990-704/705/706/707 (2-Slot ATCA Shelf)
Shelf Ground Connection 10 R1.2, March 2018
5 Shelf Ground Connection
The ATCA Shelf provides a Shelf ground terminal at the left rear side.The Shelf ground
terminal provides two threads (M5) with a 16 mm spacing between thread centers to connect
a double-lug Shelf ground terminal cable.
Figure 5: Shelf Ground Terminal
5.1 Specification for the Shelf Ground connection cable
Required wire size: AWG8
Required terminals: Use only double lug terminals (Terminal Used: PANDUIT part no. LCD8-
14A-L).
Hazardous voltage!
Before powering-up the Shelf, make sure that the Shelf Ground terminals are connect-
ed to Protective Earth (PE) of the building.
12713815
Please note, that in a typical telecom environment, the VRTN path of the -48 V supply
is grounded to Protective Earth (PE) of the building.

11990-704/705/706/707 (2-Slot ATCA Shelf)
Shelf Alarm Panel (optional) 11 R1.2, March 2018
6 Shelf Alarm Panel (optional)
Some I/O functions of the Schroff ACB-V Shelf Manager have been moved to a separate board
called Shelf Alarm Panel (SAP). The Shelf Alarm Panel is a FRU and provides:
• 3 Telco Alarm LEDs (MINOR, MAJOR, CRITICAL)
• 3 User definable LEDs
• The Telco Alarm connector (DB15-male)
• The Alarm Silence Push Button
• Serial console interfaces for Schroff Shelf Managers (RJ45 connectors)
•Temperaturesensor(LM75)
• SEEPROM for FRU information
The SAP is connected to the Schroff ACB-V Shelf Manager by a I²C connection, the signals
from the serial connectors are routed directly to serial console interface on the Shelf
Manager.
For detailed information see the SAP User Manual. order-no: 63972-230
6.1 SAP Front Panel
Figure 6: Front Panel SAP
12708813
1Fixing screw 7LED USER 2
2Serial Interface for Shelf Manager 1 8LED USER 3
3LED Minor Alarm (red) 9Telco Alarm Connector
4LED Major Alarm (red) 10 Alarm Silence button
5LED Critical Alarm (amber) 11 Serial Interface for Shelf Manager 2
6LED USER 1

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Fan Trays 12 R1.2, March 2018
7 Fan Trays
The 2 Slot ATCA Shelf contains two interchangeable Fan Trays arranged in a side to side
configuration for maximum air flow. The Fan Trays are intelligent FRUs and plugged-in at the
left and right front of the Shelf.
Each Fan Tray contains five 60 mm fans (110 m³/h (64 CFM) each). The Fan Tray is controlled
via an on-board IPM controller.
Figure 7: Fan Tray
5
12713810
1Green Fan Tray OK LED 4Hot Swap push button
2Red Fan Tray Alarm LED 5DIP Switch
3Blue Hot Swap LED

11990-704/705/706/707 (2-Slot ATCA Shelf)
Fan Trays 13 R1.2, March 2018
7.1 IPM Controller and Fan Control
The on-board IPM controller is located on the Fan Tray and has 2 operation modes:
1. Shelf Manager Mode
As soon as a Shelf Manager is plugged-in and becomes active, the IPM controller switches
automatically into the Shelf Manager mode. The Shelf Manager performs management of the
Fan Tray through the two independent bussed IPMB connections.
When the Fan Tray is first inserted into the system, the fans start at full speed and then
decrease to specified speed by Shelf Manager. The circuitry on-board the Fan Tray uses a
PWM signal to control the speed of all the fans. Lower speeds reduce acoustic noise and
power consumption and increase the lifetime of the fans.
The speed of each individual fan is monitored. If any of the fan speeds drops below the
desired fan speed, a System Event Log (SEL) entry is logged by the Shelf Manager. The Shelf
Manager then generates alerts and sets alarm conditions as necessary.
The system is designed to run indefinitely with any single fan failure. When one fan fails, all
other fans are increased to full speed. The Fan Tray has sufficient cooling capacity to keep the
Shelf cooled with a single fan failure.
2. Autonomous Mode
When no Shelf Manager is present, the Fans are controlled by the IPM controller. The fan
speed depends on the setting of DIP switch on the controller board. With a Micro DIP switch
you can select either the exhaust temperature from the left Fan Tray as reference to control
the fan speed or fixed fan speed.
Table 3: Micro DIP switch settings
Bit 1 Bit 2 Bit 3 Description
0 0 0 Fixed Speed, 50% of Full Speed
0 0 1 Fixed Speed, 70% of Full Speed
0 1 0 Fixed Speed, 90% of Full Speed
0 1 1 Fixed Speed, 100% of Full Speed
1 0 0 Exhaust Temperature 35 ~ 45 °C
1 0 1 Exhaust Temperature 40 ~ 50 °C
1 1 0 Exhaust Temperature 45 ~ 55 °C
1 1 1 Exhaust Temperature 50 ~60 °C
The default setting is 50% of full speed.

11990-704/705/706/707 (2-Slot ATCA Shelf)
Fan Trays 14 R1.2, March 2018
Figure 8: Fan Control curves
7.2 Fan Tray Indicators
The front panel includes a green and red status LED and a blue hot-swap LED.
The Hot-Swap push button indicates to the Shelf Managers that the Fan Tray is about to be
removed. Its use is optional, but it is provided so that service personnel can be trained to look
for a blue LED to be illuminated on any active component before removing it from the system.
Once the operator pushes the Hot-Swap button, the Shelf Manager is informed of the
pending extraction. When the Shelf Manager feels it is “safe“ to remove the Fan Tray, the
blue Hot-Swap LED illuminates solid.
Table 4: LEDs on Fan Tray front panel
12713803
Color Description Status Condition
Green OK LED Off No Power to the Fan Tray
Solid green Normal Operation
Red Solid red Attention Status (error condition)
Blue Hot Swap LED Off No Power to the Fan Tray or not OK to extract
Fan Tray
Short blink Preparing for extraction
Solid blue Ready to remove

11990-704/705/706/707 (2-Slot ATCA Shelf)
Fan Trays 15 R1.2, March 2018
7.3 Fan Tray Signals
The Fan Tray provides signals for:
• Voltage monitoring
• Status of the Hot Swap Controller
•FanSpeed
•Temperature
These signals are controlled by the IPM Controller on the PCB. The Shelf Manager has access
to these signals via IPMB.
7.4 Fan Tray Connector Pin Assignment
7.5 Fan Tray IPMB Addresses
Geographic address pins H2 at the Fan Tray Backplane connector determine the hardware
addresses of the devices.
Table 5: Fan Tray IPMB Addresses
HW-Addr. IPMB Addr.
Fan Tray 1 (left) 0x2E 0x5C
Fan Tray 2 (right) 0x2D 0x5A

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Fan Trays 16 R1.2, March 2018
7.6 Front Board Air Distribution
The airflow is measured with impedance boards acc. to the PICMG 3.0 R3.0 specification.
Front board pressure drop: 37 Pa at 0,85 m³/min
Figure 9: Front Board Air Distribution
Table 6: Front Air Flow
7.7 Rear Board Air Distribution
The airflow is measured with impedance boards acc. to the PICMG 3.0 R3.0 specification.
Rear board pressure drop: 24 Pa at 0,14 m³/min
Figure 10: Rear Board Air Distribution
Table 7: Rear Air Flow
12713805
Zone 1 [CFM] Zone 2 [CFM] Zone 3 [CFM] Zone 4 [CFM] [CFM]
Slot 1 17,9 (30,5 m³/h) 17,7 (30,1 m³/h) 16,8 (28,5 m³/h) 17,1 (29,0 m³/h) 69,4 (30,5 m³/h)
Slot 2 17,0 (28,9 m³/h) 16,8 (28,5 m³/h) 16,1 (27,4 m³/h) 16,1 (27,4 m³/h) 66,1 (28,9 m³/h)
34,9 (59,3 m³/h) 34,5 (58,6 m³/h) 32,9 (59,9 m³/h) 33,2 (58,4 m³/h) 135,5 (230 m³/h)
12713806
[CFM]
Slot 1 16,7 (28,4 m³/h)
Slot 2 16,0 (27,2 m³/h)
32,7 (55,6 m³/h)