schroff 7 U User manual

VME System Subracks 7 U / 8 U
User Manual
Product Numbers:
20836-716
20836-719
20836-815
Revision: R1.0, September 22, 2006
Doc-No: 63972-147

Impressum:
Schroff GmbH
D-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 © 2006
All rights and technical modifications reserved.
Rev. Date updated Change
R1.0 September 22, 2006 Initial Release

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Table of Contents
1 Safety................................................................................................................. 1
1.1 Indended Application........................................................................................... 1
1.2 Safety Instructions............................................................................................... 2
1.3 Safety Symbols used in this document................................................................ 2
1.4 General Safety Precautions................................................................................. 2
1.5 References and Architecture Specifications........................................................ 3
2 Product Definition............................................................................................. 4
2.1 Mechanical Overview........................................................................................... 5
2.2 Subrack................................................................................................................ 6
2.3 VME Backplane................................................................................................... 6
2.4 Power Supply....................................................................................................... 7
2.4.1 Grounding.............................................................................................. 7
2.5 Thermals............................................................................................................ 10
2.6 Fan Control Module (FCM)................................................................................ 11
2.7 Chassis Monitoring Module (CMM) -optional- ................................................... 12
2.8 Display Module.................................................................................................. 13
3 Installation....................................................................................................... 14
3.1 Unpacking.......................................................................................................... 14
3.1.1 Ensuring Proper Airflow....................................................................... 14
3.2 Rack-Mounting................................................................................................... 15
3.3 Assembly of additional Backplanes................................................................... 16
3.4 Basic Functional Check..................................................................................... 17
4 Service............................................................................................................. 18
4.1 Technical support and Return for Service Assistance....................................... 18
4.2 Declaration of Conformity.................................................................................. 18
4.3 Scope of delivery............................................................................................... 19
4.4 Accessories ....................................................................................................... 19
4.5 Spare Parts........................................................................................................ 19
5 Technical Data ................................................................................................ 20
6 Dimensions ..................................................................................................... 21

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VME System Subracks 7 U / 8 U Safety
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1 Safety
1.1 Indended Application
The VME system subrack, described in this manual, is indended as a platform
for a microcomputer system based on the VME bus system (VITA 1-1994).
The VME system subracks are designed for protection class IP 20 and can be
used only in the resp. environments.
For higher protection requirements, a.e. IP 54/55 you must install the system
subrack in a protective case.
VMEsystemsubracksare notend-products,sothereis novalidapprovalfor this
unit. In order to enable stand-alone functionality,additional elements are
required. An operational system is achieved only by way of appropiate VME
boards.
The completion and final testing of the units have been carried out, or at least
supervised, by qualified technicians. These instructions are directed exclusively
to these qualified technicians i.e.engineers, trained and qualified electricians
etc.
Make sure that:
• the assembled unit complies with the safety regulations currently applicable
in the country it is going to be used.
• the overall unit complies with all other regulations and specifications at the
place and country of use, e.g. interference limits, approval by the telecom-
munications authorities.

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1.2 Safety Instructions
The intended audience of this User’s Manual is system integrators and
hardware/software engineers.
1.3 Safety Symbols used in this document
1.4 General Safety Precautions
• Service personnel must know the necessary electrical safety, wiring and
connection practices for installing this equipment in a telecommunication
environment.
• Install this equipment only in compliance with local and national electrical
codes.
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!
TheShelfcontainsstaticsensitivedevices.Topreventstaticdamageyoumust
wear an ESD wrist strap.
Warning!
Voltages over 60 VDC can be present in this equipment. This equipment is
intended to be accessed, to be installed and maintained by qualified and
trained service personnel only.
This equipment is designed in accordance with protection class 1!
It must therefore be operated only with protective GND/earth connection!

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1.5 References and Architecture Specifications
• User Manual VME Backplanes
Order no.: 73972-103
• Short Form User Manual VME J1/J2 Monolithic Backplanes
Order no.: 73972-128
• User Manual Fan Control Module (FCM)
Order no.: 73972-083
For more information see the catalogue „Electronic Packaging“ and at
www.schroff.biz

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2 Product Definition
The Schroff VME subrack system consists of:
• A shielded 19“ subrack with front assembly area for
6 U front boards according to VME Standard (VITA 1-1994)
• A VME (VITA 1-1994) Backplane
• An open frame power supply with wide range input
• Speed controlled fans for cooling the boards
• Fan Control Module (FCM) for fan monitoring/controlling
• Display module
• Mains/line switch
• Rear assembly area for three 6 U, 4 HP Rear Transition Modules
The fans and the power supply are assembled on the bottom-hinged rear panel.
System differences:
The subracks 20836-716/-719 are identical in their construction. The only
difference is the depth (355 mm/475 mm).
The subrack 20836-815 is identical to 20836-716 with the following exceptions:
The 7 U system has a 0,5 U bottom plenum and a 0,5 U upper plenum. The 8 U
system has a 1 U bottom plenum and a 1 U upper plenum for more efficient
airflow and cooling.
20836-717 20836-815
Power supply 5 V / 60 A 5 V / 120 A
Fans 3 x 170 m³/h (100 cfm) 3 x 237 m³/h (140 cfm)
Backplane 12-Slot 21-Slot
Height 7 U 8 U
Variations
The Schroff assembly service can customize your subrack system with:
• Different Backplane configurations
• Drive mounting cassettes
• Special power supplies
• A Chassis Monitoring Module (CMM)
More information in the catalogue or at www.schroff.biz

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2.1 Mechanical Overview
Figure 1: Mechanical Overview (Shown at 7 U System)
10006813
1 Front card cage with guide rails 7 Fan Control Module (FCM)
2 Front panel 6 U / 36 HP
(Only 7 U system) 8 Display module
3 Space for Rear Transition Modules 9 Power supply
4 Bottom-hinged rear panel 10 AC terminal with line filter
5 VME Backplane 11 Mains/line switch
6 Axial fans

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2.2 Subrack
The 7 U / 8 U 19“ system based on the Schroff europacPro System with EMC
shielding.Thefrontcardcageprovides spacefortheinstallationof12 or21VME
Boards (6 U, 4 HP, 160 mm deep).
The lower guide rails are fitted with ESD clips.
The horizontal assembly area allows the installation of 3 Rear Transition
Modules (6 U, 4 HP). The depth depends on the system. The subrack system
20836-716 and 20836-815 allows Rear Transition Modules with a depth of 120
mm, the subrack system 20836-719 allows up to 240 mm depth.
2.3 VME Backplane
The 6 U Backplane (J1/J2 Monolithic) is compliant to:
• VITA 1-1994
• VITA 38 Systemmanagement for VME
The subrack systems 20836-716/-719 have a 12-Slot Backplane as standard,
the subrack system 20836-815 has 21-Slot Backplane. You can customize your
system with different Backplanes.
For more information see the Backplane’s User Manual, Order No.: 73972-103/
-128, in the catalogue and at www.schroff.biz
The front card cage at the 7 U system is upgradeable to 21 slots.
1 Slot = 4 HP = 20,32 mm

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2.4 Power Supply
The subrack system has a open frame AC power supply with wide range input.
The power supply is assembled on the bottom-hinged rear panel.
The power input is provided by a AC mains/line module with IEC 320-C14
connector, integrated mains/line fuses and line filter.
A mains/line switch is located at the lower front side.
Maximum fuse values are:
• 8 A (Power supply MP4 in 7 U Systems)
• 10 A (Power supply MP6 in 8 U Systems)
2.4.1 Grounding
Thereis a6,3mm fastonconnectorat therightside panel.Thisconnector isonly
for equipotential bonding. Grounding is achieved through the protective earth
conductor of the power cable!
Hazardous voltage!
Parts of the power supply may be exposed with hazardous voltage. Always
remove mains/line connector before carry out any assembly work.
Caution!
Your system has not been provided with a AC power cable. Purchase a
AC power cable that is approved for use in your country. The AC power cable
must be rated for the product and for the voltage and current marked on the
product's electrical ratings label. The voltage and current rating of the cable
should be greater than the ratings marked on the product.
Warning!
The fuse value has been determined in factory for the maximum power
delivered by the power supply. The fuse value must be changed to the actual
current of the complete equipped system.
Caution!
The unit is designed inaccordance with protection class 1! It must therefore be
operated with protective earth/GND connection. Use only a three conductor
AC power cable with a protective earth conductor that meets the IEC safety
standards!

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Figure 2: AC Power Supply
Table 1: Data AC Power Supply
e
10006819
Power supply MP4 (7 U Systems) Power supply MP6 (8 U Systems
Input voltage nominal 100 - 240 VAC 100 - 240 VAC
Mains Frequency 50 / 60 / 400 Hz 50 / 60 / 400 Hz
Output (max.) 444 W (400 W if U < 200 VAC) 744 W (600 W if U < 200 VAC)
Output voltages 5.0
12.0
-12.0
V
V
V
-
-
-
60
10
4
A
A
A
5.0
12.0
-12.0
V
V
V
-
-
-
120
10
4
A
A
A
Ripple < 1 % < 1 %
Dynamic response < 2 % or 100 mV with 25 % load
step < 2 % or 100 mV with 25 % load step
Recovery time to within 1% < 300 µsec < 300 µsec
Overvoltage protection for all voltages
110 – 120 % U > 5 V or
122 – 134 % U < 5 V
for all voltages
110 – 120 % U > 5 V or
122 – 134 % U < 5 V
Overcurrent protection 105 – 120 % of rated output current 105 – 120 % of rated output current
Hold-up time >= 20 ms >= 20 ms

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Figure 3: Block Diagram
10006820

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2.5 Thermals
The front boards are cooled by forced air convection through 3 speed controlled
24 VDC axial fans.
• 7 U System: each fan 170 m³/h (100 cfm).
• 8 U System: each fan 237 m³/h (140 cfm).
The fans are assembled on the bottom-hinged rear panel.
The air enters the subrack at thelower front into the bottom air plenum and turns
90° upward. As the air passes across the hot components on the Front Boards,
heat is carried away by forced convection. The air exits the Subrack at the top,
is drawn into the upper plenum, turns 90°, and is exhausted out the rear of the
subrack by fans.
The fan speed is controlled by the Fan Control Module (FCM) depending on the
exhaust temperature. The average temperature increase at full load is 10 K.
Figure 4: Airflow
Caution!
To maintain proper airflow, all open slots must be covered with filler panels.
The filler panel should include an airflow baffle that extends to backplane.
10002057

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2.6 Fan Control Module (FCM)
The Fan Control Module (FCM):
• Monitors and controls up to four fans
• Monitors the signals from up to four temperature sensors
• Controls the Display Module
• Speed up the fans in case of a failure of one fan
• Is able to communicate with the optional Chassis Monitoring Module (CMM)
Up to four NTC temperaturesensors can be connected to the FCM.The highest
temperature level is the reference for the fan speed. If one ore more sensors
exceed 60° C the output for the temperature fail LED and a digital output are
activated. Since the fan speed is temperature controlled by the FCM, the fans
rotate with the lowest speed possible. Lower speeds reduce acoustic noise and
increase the longevity of the fans.
The FCM also controls a Display Module. 3 green LEDs signal the 3 VME
voltages, two red LEDs signal over-temperature and fan fail events.
Figure 5: Diagram fan speed/temperature
8
Formore informationsee theFCM’s UserManual, OrderNo.: 73972-083and at
www.schroff.biz
10006807
60
100
Fan
S
peed
(%)
Over-Temp.

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2.7 Chassis Monitoring Module (CMM) -optional-
The Chassis Monitoring Module (CMM)
• monitors the three VME voltages
• can monitor two additional voltages with a range of ±24 VDC
• can monitor up to seven NTC temperature sensors
• can communicate with the Fan Control Module (FCM)
• provides 16 digital inputs
• provides 10 digital outputs
The CMM is an optional assembly and not included with the subrack by default.
The CMM is a pluggable unit in the 3 U euroboard format with a
3 U/1 HP front panel and can be assembled at the front or rear side.
The CMM allows communicationand remote monitoring via RS-232 or Ethernet
interface. The front panel provides a RJ45 connector (Ethernet) an a D-Sub9
connector (RS-232).
A user interface via HTML page is available.
The CMM can monitor the 3 VME voltages and two additional voltages (up to
±24 VDC). The error status can be displayed by LEDs, through the RS-232 serial
interface or via ethernet as a HTML page.
Up to 7 NTC temperature sensors can be connected to the CMM.Two alarm
thresholds between 20° C and 70° C can be set.
The CMM provides 16 digital inputs and 10 digital outputs for custom specific
applications. Four digital outputs are open collector outputs, isolated by opto-
couplers, six digital outputs are TTL-compatible non-isolated.
The CMM is connected to the FCM. The temperature values and the fan speeds
are transferred to the CMM.
For more information see the CMM’s User Manual, Order No.: 73972-084 and
at www.schroff.biz

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2.8 Display Module
Figure 6: Display Module
The Display Module is located at the upper front side of the subrack. 3 green
LEDs signal the 3 VME voltages, two red LEDs signal over-temperature and fan
fail events.
The Display Module is controlled by the FCM.
10006821
When a CMM is present, the Display Module is controlled by the CMM.

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3 Installation
3.1 Unpacking
Consider the following when unpacking and storing the system:
• Leave the system packed until it is needed for immediate installation.
• After unpacking the system, save and store the packaging material in case
the system must be returned.
If the packaging is damaged and possible system damage is present, report to
the shipper and analyze the damage.
3.1.1 Ensuring Proper Airflow
• Install the system in an open rack whenever possible. If installation in an
enclosed rack is unavoidable, ensure that the rack has adequate ventilation.
• Maintain ambient airflow to ensure normal operation. If the airflow is blocked
or restricted, or if the intake air is too warm, an over temperature condition
can occur.
• Ensure that cables from other equipment do not obstruct the airflow through
the systems.
• Use filler panels to cover all empty chassis slots. The filler panel prevents
fan air from escaping out of the front of an open slot.
Caution!
When opening the shipping carton, use caution to avoid damaging the system.
Caution!
To maintain proper airflow, all open slots must be covered with filler panels.
The filler panel should include an airflow baffle that extends to backplane.

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3.2 Rack-Mounting
This subrack system can be installed in 19“ equipment racks. The rack must be
accessible from the front and rear for equipment installation.
Mounting brackets and a rack mount kit come with the system. Allow sufficient
clearance around the rack for system maintenance.
Mounting Instructions:
• Ensure that the rack is constructed to support the weight and dimensions of
the Shelf.
• Install any stabilizers that came with your equipment rack before mounting
or servicing the system in the rack.
• Load the rack from the bottom to the top, with the heaviest system at the
bottom, avoid uneven mechanical loading of the rack.
• We recommend to use also chassis support brackets.
Warning!
Do NOT move the a full equipped system by yourself. Due to the weight at
least two persons are needed to accomplish this task
Warning!
Do NOT stack the system on top of any other equipment. If the system falls, it
can cause severe bodily injury and damage the equipment.

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3.3 Assembly of additional Backplanes
With the subrack systems 20836-716/-719 you can assemble an additional
Backplane.
Obey the following instructions:
1 Disconnect the System from the line/mains power supply.
2 Remove the front panel.
3 Mount the guide rails.
4 Remove the back panel.
Note: Open the back panel to an angle of 135°. At this angle you can
separate the hinges and remove the back panel completely.
5 Attach the new Backplane with two M2.5 screws and isolating washers at
the top and the bottom, but do not tighten the screws.
6 To align the Backplane, insert a VME board in the outer guiderails at the left
and the right.
7 Attach the Backplane using M2.5 screws and isolating washers.
Note: Use at least every second mounting hole at the top and the bottom.
8 Connect the Backplane to the system power.
9 Attach the rear panel.
10Power-up the systems without the VME boards and check all VME voltages
at the backplane connectors.
Note: For instructions see Chapter3.4, "Basic Functional Check".
For more information and further assembly instruction see the Backplanes
User manual.