9u mtca.4 shelf – jtag/white rabbit support · r. waldt/fae/2017-05-23 blatt 4 / 7 backplane for...

PENTAIR TECHNICAL SOLUTIONS

R. Waldt/FAE/2017-05-23 Blatt 1 / 7

9U MTCA.4 Shelf – JTAG/White Rabbit Support

Description

Schroff Product Number:

11850-027 9 U MicroTCA.4 Shelf 12 Slots with White Rabbit Support

11850-028 9 U MicroTCA.4 Shelf 12 Slots without White Rabbit Support



Product Definition

The both versions of the Schroff 9 U MicroTCA.4 Shelf with rear μRTM area are prepared for AMC double

mid-size modules and RTMs double mid-size.

Each shelf provides the option to assemble a JTAG-module on the lower rear side.

Shelf pn 118500-027: - Prepared to support the White Rabbit protocol.

- No update-channel between the MCHs.

Shelf pn 118500-028: - No support the White Rabbit protocol.

- Update-channel between the MCHs.

Hardware Platform

• Shielded galvanized steel subrack with 19” rack mounting brackets

• MicroTCA Backplane with radial IPMI-L from both MCH slots to all AMC slots and bused IPMB-0

among MCHs, PMs and CUs.

• The backplane supports the White Rabbit protocol.

• The Shelf provides:

• 12 AMC double mid-size slots

• 2 redundant MicroTCA Carrier Hub (MCH) slots (double full-size)

• 4 Power Module (PM) slots (double full-size)

• 12 RTM double mid-size slots

• 1 JSM slot single full size in a separate card cage on the lower area of the rear side.

• Active cooling through two hot-swappable Cooling Units (CUs) in push-pull configuration,

providing each:

• 6 speed controlled 12 VDC fans.

• Cooling Unit Enhanced Module Management Controller (CU EMMC)

• Display Module

• Front accessible air filter

Backplane

The 12+2+4 slot MicroTCA Backplane provides:

• 12 AMC double Mid-size slots (4 HP)

• 2 double Full-size MicroTCA Hub (MCH) slots (6 HP)

• 4 Power Module (PM) slots for Double Full-size Power Modules or for 2 x 12 HP Power Modules

• 1 AMC connector for JTAG-module S-FS

• 2 Connectors for Cooling Units

Depending of the shelf version the backplane supports the White Rabbit trigger distribution or the MCH

update channel by the assembly positions of 0 Ω resistors.

The mapping of MCH-ports to AMC-ports 17…20 is not critical since all ports on MCH timing modules are

fully programmable. But this needs to be defined.



Backplane Topology



Backplane for shelf pn 11850-027 with support of the White Rabbit trigger distribution.

The Update-Channels between the MCHs are disconnected and the White Rabbit-Clock-connections to

the AM1/AMC12 are realized with 0 Ω resistors.

Backplane for shelf pn 11850-028 with update-channel between the MCHs.

The Update-Channels between the MCHs are connected via 0 Ω resistors and the resistors for the White

Rabbit-Clock-connections to the AM1/AMC12 are not assembled.

Backplane rear side

Detailed view

Assembly option for Update-Channel Assembly 0 Ω-resistors for WR-Support Assembly option for Update-Channel



JTAG-module

The chassis provides an assembly room for a JTAG-module single full-size in the lower area of the rear

side. This position avoids any occupation of an AMC slot and due to the low heat dissipation the air flow

is sufficient.

The module itself is not part of the delivery volume.



JSM Slot Pinout

Air Filter

The MicroTCA Shelf provides a front replaceable air filter.

The filter meets the following standards and classifications:

• UL 900 Class 2, UL94 HF-1

• Telcordia NEBS GR-78-CORE

• Telcordia NEBS GR-63-CORE



Cooling Units

The MicroTCA Shelf provides two front-pluggable Cooling Units. Each Cooling Unit contains three 12 VDC

fans (290m³/h (171 cfm) each) for the AMC section, three 12 VDC fans (190 m³/h (111 cfm) each) for the

μRTM section and a Schroff Cooling Unit Enhanced Module Management Controller (CU EMMC). The

speed level of the AMC and the μRTM fans can be controlled independently. The CU EMMC has an

Enhanced Module Management Controller (EMMC) onboard that communicate with the Carrier Manager

over IPMB-0. The CU EMMC controls the fan speed, monitors the air filter sensor and provides hot-swap

functionality.

Technical Data

1-6 Fan

7 Hot swap bush button

8 CU 1

9 CU 2

9u mtca.4 shelf – jtag/white rabbit support · r. waldt/fae/2017-05-23 blatt 4 / 7 backplane for...

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