Chenbro RM41736 Plus User manual

RM41736 Plus Chassis
Rackmount Server User Manual
October 2019 Version 2.0
A document provides an overview of product features, functions, architecture, and support specifications.

RM41736 Plus
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DISCLAIMERS
No license (express or implied, by estoppel or otherwise) to any intellectual property rights is granted by this document.
Chenbro disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness
for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or
usage in trade.
This document contains information on products, services and/or processes in development. All information provided here is subject
to change without notice. Contact your Chenbro representative to obtain the latest Configuration Guide.
The products and services described may contain defects or errors known as errata which may cause deviations from published
specifications. Current characterized errata are available on request.
Chenbro, and the Chenbro logo are trademarks of Chenbro Micom Co., Ltd. in the worldwide.
*Other names and brands may be claimed as the property of others
© 2019 Chenbro Micom Co., Ltd.

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Table of Contents
Table of Contents..........................................................................................................................................3
List of Figures................................................................................................................................................4
List of Tables .................................................................................................................................................5
1. Product Overview..........................................................................................................................6
1-1 System Features Overview.......................................................................................................7
1-2 Front Panel..............................................................................................................................8
1-3 Back Panel...............................................................................................................................9
1-4 Front Control Panel ...............................................................................................................10
1-5 Chassis Dimensions ...............................................................................................................11
1-6 Available Rack Mounting Kit Options (Refer to “Installation”) ................................................12
1-7 System Level Environmental Specifications............................................................................13
1-8 System Packaging.................................................................................................................14
2. System Components Removal and Installation ............................................................................15
2-1 Top Cover Removal and Installation .......................................................................................16
2-2 External Hot-Swap HDD Assembly Removal and Installation..................................................17
2-3 System Maintenance .............................................................................................................19
2-4 Fan Module Removal and Installation....................................................................................20
2-5 Rear 2.5” HDD Module Removal and Installation...................................................................21
2-6 Rear 2.5” HDD Module Removal and Installation...................................................................22
2-5 MB Tray Removal and Installation..........................................................................................24
2-5 PSU Installation and Removal ................................................................................................25
2-7 Slide Rail Installation .............................................................................................................27
3. Backplane....................................................................................................................................29
3-1 Storage Backplane Options....................................................................................................30
3-2 3.5” 24-Port 12Gbps Active Backplane ..................................................................................31
3-3 3.5” 12-Port 12Gbps Active Backplane...................................................................................34
3-3 2.5” 2-Port SATA/SAS passive backplane ................................................................................37
4. Maintenance and Service ............................................................................................................39

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List of Figures
Figure 1 RM41736 Plus overview .............................................................................................................7
Figure 2 RM41736 Plus major components overview...............................................................................7
Figure 3 Front panel.................................................................................................................................8
Figure 4 Back panel with redundant PSU..................................................................................................9
Figure 5 Front control panel...................................................................................................................10
Figure 6 Chassis dimensions...................................................................................................................11
Figure 8 Top cover installation................................................................................................................16
Figure 9 3.5” hot-swap HDD assembly installation .................................................................................17
Figure 10 3.5” hot-swap HDD assembly removal......................................................................................17
Figure 11 3.5” HDD installation (tool-less type)........................................................................................18
Figure 12 Installation of whole system into the rack (screw type).............................................................19
Figure 13 Middle fan module installation.................................................................................................20
Figure 14 Rear 2.5” hot-swap HDD assembly removal..............................................................................21
Figure 15 Rear 2.5” hot-swap HDD assembly installation .........................................................................21
Figure 16 2.5” HDD internal bracket Installation.......................................................................................22
Figure 17 Rear 2.5” hot-swap HDD module installation............................................................................22
Figure 18 2.5” HDD internal bracket Installation.......................................................................................23
Figure 19 MB tray removal.......................................................................................................................24
Figure 20 Redundant PSU cage assembly installation ...............................................................................25
Figure 21 Redundant PSU cage assembly installation...............................................................................25
Figure 22 CRPS module Installation..........................................................................................................26
Figure 23 CRPS module removal ..............................................................................................................26
Figure 24 Slide rail installation-1 (84H341810-046)..................................................................................27
Figure 25 Slide rail installation-2 (84H341810-046)..................................................................................27
Figure 26 Slide rail installation-3 (84H341810-046)..................................................................................28
Figure 27 Drive carrier LED identification .................................................................................................29
Figure 28 Backplane front view................................................................................................................31
Figure 29 Backplane rear view .................................................................................................................32
Figure 30 Backplane front view................................................................................................................34
Figure 31 Backplane rear view .................................................................................................................35
Figure 32 Backplane device-side view ......................................................................................................37
Figure 33 Backplane host-side view .........................................................................................................37

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List of Tables
Table 1 Chenbro RM41736 Plus specifications..........................................................................................6
Table 2 Front control panel ....................................................................................................................10
Table 3 Slide rail options ........................................................................................................................12
Table 4 System environmental specifications summary..........................................................................13
Table 5 System packaging information ...................................................................................................14
Table 6 Product weight information .......................................................................................................14
Table 7 Drive power LED/activity LED behavior ......................................................................................29
Table 8 Backplane specifications ............................................................................................................31
Table 9 Connector and pin header function description .........................................................................32
Table 10 DIP switch setting ......................................................................................................................33
Table 11 Backplane specifications ............................................................................................................34
Table 12 Connector and pin header function description .........................................................................35
Table 13 DIP switch setting ......................................................................................................................36
Table 14 Backplane specifications ............................................................................................................37
Table 15 Connector and pin header function description .........................................................................38

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Product Overview │ 6
1. Product Overview
RM41736 Plus offers a double-access design with high-capacity storage. It supports for up to thirty-six bays 3.5” hot-swap drives
and optional two 2.5” HDD with significantly energy saving PSU and fan power to facilitate it an adaptable architecture for diverse
workloads. This chapter provides a high-level overview of the system features and available options. More details for each major
sub-system, feature, or option are provided in the following chapters.
Table 1 Chenbro RM41736 Plus specifications
Feature
Description
MB Form Factor
SSI EEB (12” x 13”)
Dimension
(D x W x H)
699.0 x 432.0 x 176.0 (mm)
27.52’’ x 17.00’’ x 6.93’’
Drive Bay
Hot-swap HDD: 36 x 3.5”
Storage Backplane
1 x 3.5” 24-port 12Gbps SAS3/SATA3 Active Backplane
1 x 3.5” 12-port 12Gbps SAS3/SATA3 Active Backplane
1 x 2.5” 2-port 12Gbps SAS3/SATA3 Passive Backplane (Option)
PSU Form Factor
(D x W x H)
1+1 CRPS, 80 PLUS Platinum, 1200W (Default)
265.0 x 76.9 x 84.0 (mm)
Indicator
1 x Power Status,1 x HDD Activity, 1 x System Alarm, 2 x LAN Activity
Front Control
1 x Power On/Off, 1 x Alarm Mute, 1 x System Reset, 2 x USB2.0
System Security
Intrusion Switch
Expansion Slot Opening
7 x Low Profile
System Fan
Middle: 7 x 8038 Hot-swap Fan, PWM, 7500RPM
Front Bezel
N/A
Rail Kit
Tool-less, Full Travel 736.0 mm/28.90"
Temperature
Operating: 5°C to 35°C (50°F to 95°F)
Non-operating: -40°C to 70°C (-40°F to 158°F)
Humidity
Non-operating: 5% to 90%
Net Weight
26.7 kg/58.91 lb
Gross Weight
31.9 kg/70.31 lb
Container Loading
20': 105, 40': 215, 40'H: 258

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Product Overview │ 7
1-1 System Features Overview
Figure 1 RM41736 Plus overview
Figure 2 RM41736 Plus major components overview
A. Rack Handle
B. Front I/O Switch
C. 3.5”Storage Drive Bay
D. Intrusion Switch
E. System Hot-swap Fan Module
F. Rear 2.5” 2-bay Drive Module
G. Power Supply Unit

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Product Overview │ 8
1-2 Front Panel
Figure 3 Front panel
A. Front Control Switch
B. Rack Screw Hole
C. Storage Drive Bay
D. Front I/O

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Product Overview │ 9
1-3 Back Panel
Figure 4 Back panel with redundant PSU
A. 3.5” Storage Drive Bay
B. CRPS
C. Rear 2.5” 2-bay Drive Module
D. Top Cover Thumb Screw
E. Low Profile PCIe Expansion Slot

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Product Overview │ 10
1-4 Front Control Panel
Figure 5 Front control panel
Table 2 Front control panel
Label
ICON
Indicator, button or connector
A
PowerButtonwith LED
B
ResetButton
C
Alarm Mute Button
D
HDD StatusLED
E
System AlarmLED
F
LAN1 Activity LED
G
LAN2 Activity LED
H
USB3.0

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Product Overview │ 11
1-5 Chassis Dimensions
Figure 6 Chassis dimensions

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1-6 Available Rack Mounting Kit Options (Refer to “Installation”)
Advisory Note –Available rack and cabinet mounting kits are not designed to support shipment of the server system while installed
in a rack. If you choose to do so, Chenbro advises you verify your shipping configuration with appropriate shock and vibration
testing before shipment. Chenbro does not perform shipping tests which cover the complex combination of unique rack offerings
and custom packaging options.
Caution: Exceeding the specified maximum weight limit of a given rail kit or misalignment of the server in the rack may result in
failure of the rack rails, causing damage to the system or personal injury. Two persons at least or the use of a mechanical assist tool
to install and align the server into the rack is highly recommended.
Available rack mounting kits:
Table 3 Slide rail options
Part Number
84H341810-046
Rail Dimension (mm/inch)
686.0/27.00"
Applicable Cabinet - Post to Post (mm/inch)
711.0~960.0/28.00"~36.00"
3 Section/2 Section
3 Section
Traveling Distance (mm/inch)
736.0/28.90"
Support Chassis Width
430.0
Loading (kg)
166.5 kg
Max. Static Loading (kg) for UL
75.0 kg
Tool-less
Yes
Support CMA
No

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Product Overview │ 13
1-7 System Level Environmental Specifications
The following table defines the system level specifications under operating and non-operating environments.
Table 4 System environmental specifications summary
Parameter
Specification
Temperature
Operating
5ºC to 35ºC (41ºF to 95ºF)
Temperature
Non-Operating
-40ºC to 70ºC (-40ºF to 158ºF)
Humidity
Non-Operating
50% to 90%, non-condensing with a maximum wet bulb of 28° C (at
temperatures from 25°C to 35°C)
Unpackaged
Shock
Non-Operating
Trapezoidal, 25 g, velocity change is based on product weight
Vibration
Operating
5 Hz @ 0.0002 g2/Hz to 350 Hz @ 0.0002 g2/Hz
Input acceleration is 0.26 g RMS
10 minutes per axis for all 3 axes on all samples
Random control limit tolerance is ± 3 dB
Sag & Bow
Non-Operating
Tolerance analysis among rack, rail and chassis
Actual on rack test with EIA Go-NoGo fixture
EMI
Pre-scan
Radiated Emissions
CISPR CLASS A (under 6dB):
30~1000 MHz vertical/horizontal
1G~6G GHz vertical/ horizontal
1G~18G GHz vertical/horizontal
RVI
Operating
HDD class
Class 1: Highest performance, reliability, and data integrity
Class 2: A second tier of performance, reliability, and data integrity
HDD I/O throughput degradation SPEC
Pass/Fail Criteria
No functional failure during test or post-test diagnostics.
Requirement to pass test is based on IOMeter data throughput (in IO’s per
second) expressed as a percent of Test HDD maximum theoretical
baseline performance
Class1: > 90% of baseline for 4K random writes and > 80% of baseline for
128K sequential writes
Class2: > 85% of baseline for 4K random writes and > 75% of baseline for
128K sequential writes
Mix: > 80% of baseline for 4K random writes and > 70% of baseline for
128K sequential writes
Packaged
Vibration
Non-Operating
ISTA (weight over 68 kg, 1B; weight equal or less than 68 kg, 1A)
Packaged Drop
Non-Operating
Drop height change is based on product weight
Non-palletized product:
Investigation: Test requirement is 6 face drops, 8 corner drops and 12
edge drops for a total of 26 drops
Validation: Test requirement is 6 face drops, 2 corner drops and 3 edge
drops for a total of 11 drops
Palletized product: (Both investigation and validation)
Perform two bottom drops at the specified height, 10 bottom drops at
one half of the specified height
Perform 4 rotational edge drops (one per edge) at the specified height

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1-8 System Packaging
The original Chenbro packaging, where the server system is delivered, is designed to provide protection for L5 configuration and
tested to meet ISTA (International Safe Transit Association) Test Procedure 1A (2008). The packaging is also designed to be reused
for shipment after system integration has been completed.
The original packaging includes the shipping box, and various protective inner packaging components, which are designed to
function together as a protective packaging system. When reused, all of the original packaging material must be used, including box
and each inner packaging component. In addition, all inner packaging components MUST be reinstalled in the proper location to
ensure adequate protection of the system for subsequent shipment.
Table 5 System packaging information
Part Number
Single/Bulk
Form Factor (mm)
Support Level
87H341824-102
Single
940.0 x 586.0 x 319.0
L5
NOTE: The design of the inner packaging components does not prevent improper placement within the packaging assembly.
There is only one correct packaging assembly that will allow the package to meet the ISTA (International Safe Transit
Association) Test Procedure 1A (2008).
Failure to follow the specified packaging assembly instructions may result in damage to the system during shipment.
Table 6 Product weight information
NOTE: An L5 system does not include motherboard, processors, memory, drives, or add-in cards. It is the system
configuration as shipped from Chenbro. Weights of integrated system (system configurations that include the items above)
will vary depending on the final system configuration.
Product
Unpackaged Net Weight
（kg）
Packaged Gross Weight
（kg）
Unpackaged Net Weight
(lb)
Packaged Gross Weight
(lb)
RM41736 Plus
26.7
31.9
58.91
70.31

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System Components Removal and Installation │ 15
2. System Components Removal and Installation
RM41736 Plus supports for a variety of different storage options:
36 x 3.5” Hot-swap SAS/SATA HDD .
Support for different storage and peripheral options will vary depending on the system model and/or available accessory options
installed.

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System Components Removal and Installation │ 16
2-1 Top Cover Removal and Installation
Figure 7 Top cover removal
1. Loosen two shipping screws on the top cover as shown.
2. Loosen two thumb screws on the rear as shown.
3. Slide the cover towards the rear and remove it.
Figure 8 Top cover installation
1. Align the guide pins of the top cover with the grooves on the chassis base.
2. Slide the cover towards the front into the specified position and fasten the thumb screws.
3. Make sure the top cover is secured firmly.

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System Components Removal and Installation │ 17
2-2 External Hot-Swap HDD Assembly Removal and Installation
Figure 9 3.5” hot-swap HDD assembly installation
1. With the lever open, insert the HDD assembly into the drive bay until the end of the HDD cage.
2. Push the lever until it is secured with a click.
Figure 10 3.5” hot-swap HDD assembly removal
1. Press the carrier button and release the lever as shown.
2. Hold the lever and pull the HDD assembly out the drive bay.

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System Components Removal and Installation │ 18
Figure 11 3.5” HDD installation (tool-less type)
1. Slide in the HDD and align it with one side of HDD carrier.
2. Push down the HDD when it is secured with a click.
3.5” HDD removal (tool-less type)
1. Put the HDD carrier upside down.
2. Put your two thumbs on the HDD.
NOTE: Please operate this on a stable surface in case the HDD dropping unexpectedly.
To avoid injury, be careful of the sharp corners and rough edges on HDD carrier.
3. Lift the side with your other fingers and release the HDD.

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System Components Removal and Installation │ 19
2-3 System Maintenance
Figure 12 Installation of whole system into the rack (screw type)
1. Firmly hold the system by two persons at least, and push the system all the way into the cabinet.
2. Tighten the screws on both sides of the rack.
Removal of whole system from the rack
1. Loosen the screws.
2. Firmly grab the handles on both sides by at least two persons, and pull the system out of the rack.

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System Components Removal and Installation │ 20
2-4 Fan Module Removal and Installation
Figure 13 Middle fan module installation
1. Hold the tabs of fan brackets as shown.
2. Insert the fan module into the fan cage until it is locked with a click.
Middle fan module removal
1. Press and hold the tabs of fan brackets to release the fan module vertically.
2. Disengage it from fan cage.