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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
PENTAIR TECHNICAL SOLUTIONS
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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.
PENTAIR TECHNICAL SOLUTIONS
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Backplane Topology
PENTAIR TECHNICAL SOLUTIONS
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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
PENTAIR TECHNICAL SOLUTIONS
R. Waldt/FAE/2017-05-23 Blatt 5 / 7
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.
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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
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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