VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
Backplane 46M60-306-1b20
Key features:
¾
Topology: Full Mesh
¾
VPX Backplane compliant to the VITA 46.0
core specification
Backplane is supporting subsidiary
¾
specifications for protocols as:
Serial Rapid IO (VITA 46.3), PCI Express
(VITA 46.4) and Ethernet (VITA 46.7)
High flexibility allowing applications to
¾
dictate the necessary fabric mapping
High-speed Multi-gig connector in mesh
¾
topology
¾
Rugged Eurocard form factor in 6U height
¾
Designed to support Rear Transition Modules
according to the VITA 46.10 specification
System Management interface on the
¾
backplane
About this backplane:
•
16 layer stripline design
•
6U height
•
6 Slots
•
Slot Pitch: 1,0” (25.4mm)
•
PCB size: 171,7mm x 262.05mm
•
PCB thickness: 4.5mm
•
PCB material: NELCO 4000-13
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ELMA Trenew: Backplanes Department
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VPX (VITA 46) 6U, 6 Slots,
Backplane 46M60-306-1b20
Full Mesh, no VME
Backplane Interconnection Diagram
•
Full-Mesh Topology meaning each VPX Slot communicates with each other VPX
slots through 1 x VITA 46.0 “Fat Ports”
•
Rear I/O access is available on RP0, RP2….RP6 (see VITA 46.0 I/O texts)
Figure.1
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VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
Backplane 46M60-306-1b20
General considerations:
™
A channel comprised of four bi-directional links is referred to as a “fat pipe”
™
A channel comprised of one or two bi-directional links is referred to as a “thin pipe”
•
Supports five VPX Slots routed in a full mesh topology (see Variant 2) or in a replicated
full-mesh, using “fat pipes”*:
4 links = 8 differential pairs / channel
Figure.2
•
High-speed Multi-Gig RT-2 connectors for up to 6.4 Gbps data rate are used in all five
Slots
(J0, J1, J2, J3, J4, J5 and J6 connectors)
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VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
Backplane 46M60-306-1b20
Backplane Mechanical Drawing (rear view)
Figure.3
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VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
•
Backplane 46M60-306-1b20
Alignment / Keying modules for all VPX slots.
Alignment Key 1 refers to the voltage keying pin: 3150 for +12V
Alignment Keys 2 & 3 are providing a specific unique keying for each slot.
By default assembled:
Figure.4
•
Power studs: M4 and M3 type
•
Current capability:
•
o
+12V Æ 44Amp/slot Æ 220Amp/BP
o
+5V Æ 22Amp/slot Æ 110Amp/BP
Additional power connections for external voltages, power studs M3 type :
March, 2010
o
-12V_AUX
o
+3.3V_AUX
o
+12V_AUX
ELMA Trenew: Backplanes Department
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VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
Backplane 46M60-306-1b20
•
A faston for VBAT is providing the access to a “Battery Back-up”
•
System management connection : IPMB bus 1 is routed to two 5-pin System Management bus
extension connectors on the backplane, according to the VITA 38 specification (System
Management on VME):
Signal
1
SM0
2
GND
3
SM1
4
+5V
5
Figure.5
•
System Controller (SYS_CON) signal, by default grounded at leftmost slot (slot 1) which is
configured as System Controller.
•
Very robust connectors Molex Micro-fit connectors (44914-xxxx) for:
•
Power Supply Sense Lines (SENSE)
•
JTAG (J1)
•
Auxiliary Voltage from Battery (VBAT)
•
Monitoring (FCON)
Figure.6
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VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
•
Backplane 46M60-306-1b20
Rear Transition Module support according to the VITA 46.10 specification (Rear Transition
Module on VPX). Rear I/O access is available on RP0, RP2….RP6
Figure.7
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VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
Backplane 46M60-306-1b20
Designed to meet the following VPX (VITA 46) Specifications:
•
ANSI VITA 46.0 (VPX Baseline Standard) – approved in October 2007
•
VITA 46.3 (Serial RapidIO on VPX Fabric Connector) – draft phase
•
VITA 46.4 (PCIExpress on VPX Fabric Connector) – draft phase
•
VITA 46.7 (Ethernet on VPX Fabric Connector) –draft phase
•
VITA 46.10 (Rear Transition Module on VPX) –draft phase
Additional active VPX (VITA 46) Specifications (not relevant
for this Backplane):
•
VITA 46.20 (Switch Slot Definition) – draft phase
Subject to technical change - Copyright ELMA Trenew Electronic GmbH
March, 2010
ELMA Trenew: Backplanes Department
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VPX (VITA 46) 6U, 6 Slots,
Full Mesh, no VME
Benefits of VPX (VITA 46):
Backplane 46M60-306-1b20
For many applications, the data transmission rate and vibration resistance of the
conventional VME64x technology are no longer adequate. Consequently, solutions
based on VITA 46 / VPX are targeted especially at aviation and defence technology
applications thanks to their inherent shock and vibration resistance. Due to the
constantly increasing demand, ELMA has expanded its product range once again.
Several models are available, including a new 3U backplane. A variety of basic systems
using three different cooling concepts – convection, conduction and liquid cooling –
cover all significant application areas in this category.
Another new product is a test card that enables developers of daughter boards and
system integrators to optimise their products without any need for supplementary test
equipment. The interactions between the various individual components in the overall
system can be tuned in advance in order to ensure reliable operation.
The special backplane plug-and-socket connectors, which are compliant with the VITA 46
specification, already support data transmission rates up to 10 Gbps and thus guarantee a long
product life cycle. The connectors employ differential wafer technology to ensure reliable contact
between the backplane and the daughter cards. This improves the data transmission
characteristics and prevents bending of the pins when the cards are exchanged. This technology
enables field exchange while at the same time yielding low maintenance costs.
Another special feature of VPX is the possibility of using a rear transition module with a form
factor as low as 3U. This makes it possible to implement systems, including I/O cards, with
space-saving, low-weight constructions.
Another new product from ELMA is the SerDes test module, which enables VPX systems to be
optimized without any supplementary test equipment. This is because the number of slots across
which the transmitter and receiver cards have to communicate with each other can in fact make a
difference in terms of propagation delay behaviour. For example, if the preamplification of the
daughter boards is not right – and there are several hundred setpoints for configuring this – the
result is transmission errors.
The entire system is slowed down by the need for repeat transmission of these erroneous signals.
By contrast, the system can be optimised ‘slot by slot’ with the new test modules. For this
purpose, the card to be tested is plugged into its slot in the system, and the test card is plugged
into the receiver slot. All of the test criteria are configured and examined directly on the test card,
which only has to be connected via a USB port to a computer equipped with an easy-to-use
graphic user interface for visualisation and evaluation. Systems that are optimised in this manner
guarantee the highest possible performance
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