duagon MC50M User manual

User Manual

MC50M
DIN-Rail Computer with Intel Atom Processor for Rolling Stock
Embedded System for IoT, Security and Predictive Maintenance
2020-10-2020MC50M00 E5

20MC50M00 E5 2020-10-20 2
Contents
Contents
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
About this Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Product Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Product Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1.2 Product Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
1.2.1 Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
1.2.2 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
1.3 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
1.4 Cooling Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
1.5 Product Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
1.6 Identification of DIN-Rail Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
2 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.1 Unpacking the MC50M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.2 Configuring the Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.2.1 Installing In-System Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.3 Mounting the MC50M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.3.1 Safety Instructions for Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.3.2 Mounting the System on a DIN Rail. . . . . . . . . . . . . . . . . . . . . . . . . .27
2.4 Connecting and Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2.4.1 Safety Instructions for Connection . . . . . . . . . . . . . . . . . . . . . . . . . .29
2.4.2 Connecting an Earthing Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2.4.3 Connecting Peripherals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.4.4 Connecting the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
2.4.5 Starting Up the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
2.4.6 Configuring the UEFI Firmware for PXE Boot. . . . . . . . . . . . . . . . . .33
2.5 Installing Operating System Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
2.6 Using the MC50M under Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.6.1 Linux Support for Individual Functions. . . . . . . . . . . . . . . . . . . . . . .34
2.6.2 Yocto Linux Board Support Package (BSP) . . . . . . . . . . . . . . . . . . . .35
2.6.3 Accessing SMBus/I2C Devices using Standard Linux I2C Tools. . . 35
2.6.4 Triggering the BMC Watchdog Directly via CPU GPIO . . . . . . . . . .35
2.6.5 Managing RTC Time Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2.6.6 Configuring the Serial Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2.6.7 Accessing User LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
2.7 Using the MC50M under Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
2.7.1 Windows Support for Individual Functions . . . . . . . . . . . . . . . . . . .44
2.7.2 Managing RTC Time Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . .45
2.7.3 Configuring the Serial Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
3 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3.1 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
3.1.1 Pin Assignment for Product Versions 06MC50Mxx. . . . . . . . . . . . . 46

20MC50M00 E5 2020-10-20 3
Contents
3.1.2 Pin Assignment for Prototype Versions 06MC50MPxx. . . . . . . . . .46
3.1.3 Ignition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
3.1.4 Inrush Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
3.1.5 Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
3.2 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.2.1 Processor Core . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.2.2 Thermal Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.3 Trusted Platform Module (TPM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.4 Supervision and Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.4.1 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.4.2 Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3.4.3 Event Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3.4.4 Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3.5 Real-Time Clock (RTC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
3.5.1 Software Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
3.6 Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3.6.1 System RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3.6.2 Boot Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3.7 Mass Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3.7.1 eMMC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3.7.2 SSD M.2 Slot (NVMe) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3.8 Isolation Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
3.9 Video (Service) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.9.1 Front Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
3.9.2 Front Interface Adapters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
3.9.3 DisplayPort to DisplayPort Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . .57
3.10 USB (Service) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
3.10.1 Front Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
3.11 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
3.11.1 Front Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
3.11.2 M12 to RJ45 Adapter Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
3.11.3 Ethernet MAC Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
3.11.4 Ethernet Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
3.12 RS232/RS422/RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
4 UEFI Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
4.1 Accessing the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
4.2 Setup Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
4.3 Setup Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
4.3.1 Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
4.3.2 MEN Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
4.3.3 Advanced Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
4.3.4 Chipset Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
4.3.5 Security Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
4.3.6 Boot Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
4.3.7 Save & Exit Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
5 Hardware/Software Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
5.1 SMBus/I2C Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
5.1.1 CPU Module User LED and Ignition Watchdog . . . . . . . . . . . . . . . .75
6 EN 50155 Documentation Compliance Overview . . . . . . . . . . . . . . . . . . . 77

20MC50M00 E5 2020-10-20 4
Contents
Figures
Figure 1. Front interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 2. Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 3. Sides needed for cooling (exemplary system) . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 4. Product label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 5. DIN-Rail system label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 6. Position of DIN-Rail system label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 7. Position of DIN-Rail product label (back view) . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 8. Mounting terminal blocks (exemplary system) . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 9. Power configuration and coding labeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Figure 10. Connecting the power supply to a MP1/MC50M combination . . . . . . . . . . . . 32
Figure 11. Ignition behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Figure 12. Ignition and shut-down delay watchdog state diagram. . . . . . . . . . . . . . . . . .49
Figure 13. System positions within a modular DIN-Rail system . . . . . . . . . . . . . . . . . . . .74

20MC50M00 E5 2020-10-20 5
Contents
Tables
Table 1. Linux ttyFx to front interface assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Table 2. Connector types – power supply (5-pin M12) . . . . . . . . . . . . . . . . . . . . . . . . . .46
Table 3. Pin assignment - power supply (5-pin M12 A-coded) for 06MC50Mxx . . . . . 46
Table 4. Pin assignment - power supply (5-pin M12 A-coded) for 06MC50MPxx . . . . 46
Table 5. Signal mnemonics – power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Table 6. Inrush current measurements on PWR_IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Table 7. General status LEDs at front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Table 8. CPU status LED at front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Table 9. Error codes signaled via status LED flashes. . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Table 10. Isolation voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 11. Connector types – DisplayPort. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Table 12. Pin assignment – DisplayPort. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Table 13. Signal mnemonics – DisplayPort . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Table 14. Connector types – USB 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Table 15. Pin assignment – USB 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Table 16. Signal mnemonics – USB 3.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Table 17. Connector types – Ethernet (8-pin M12 X-coded) . . . . . . . . . . . . . . . . . . . . . . .59
Table 18. Pin assignment – Ethernet (8-pin M12 X-coded) . . . . . . . . . . . . . . . . . . . . . . . .59
Table 19. Signal mnemonics – Ethernet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Table 20. Ethernet MAC addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Table 21. Ethernet status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 22. Connector types – RS232/RS422/RS485 (9-pin D-Sub) . . . . . . . . . . . . . . . . . . .61
Table 23. Pin assignment – RS232/RS422/RS485 (9-pin D-Sub) . . . . . . . . . . . . . . . . . . . .61
Table 24. Signal mnemonics – RS232. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Table 25. Signal mnemonics – RS422/RS485. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 26. UEFI firmware: MEN Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Table 27. UEFI firmware: Sub-menu BMC Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Table 28. UEFI firmware: Sub-Menu Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Table 29. UEFI firmware: Sub-Menu Memory Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 30. UEFI firmware: Sub-Menu SATA Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Table 31. UEFI firmware: Sub-Menu USB Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Table 32. UEFI firmware: Setting passwords. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Table 33. UEFI firmware: Security modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 34. SMBus/I2C devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Table 35. CPU module user LED and ignition watchdog register mapping . . . . . . . . . .75
Table 36. CPU module user LED and ignition watchdog data register (read)
(offset 0x00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Table 37. CPU module user LED and ignition watchdog data register (write)
(offset 0x01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Table 38. CPU module user LED and ignition watchdog configuration register
(offset 0x03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Table 39. Compliance with EN 50155, chapter 12.3 Datasheet . . . . . . . . . . . . . . . . . . . . 77
Table 40. Compliance with EN 50155, chapter 12.5 Equipment integration/installation
documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

20MC50M00 E5 2020-10-20 6
About this Document
About this Document
This document is intended only for system developers and integrators.
It describes the design, functions and connection of the product. The manual does not
include detailed information on individual components (data sheets etc.).
This document fulfills the requirements of EN 50155:2017 (Railway applications - Rolling
stock - Electronic equipment) from the following chapters in the standard, as far as
applicable:
12.3 Datasheet
12.4 User manual
12.5 Equipment integration/installation documentation
MC50M product page with up-to-date information and downloads:
www.duagon.com/products/mc50m/

20MC50M00 E5 2020-10-20 7
About this Document
History
Issue Comments Date
E1 First issue 2018-12-20
E2 Updated chapter
Power Supply
Ignition
Typical Application of the MC50M
Connecting the Power Supply
Added chapter
EN 50155 Documentation Compliance Overview
Using the MC50M under Windows
Configuring the Serial Interfaces
2019-06-11
E3 Updated chapter
Connecting the Power Supply
SMBus/I2C Devices
Status LEDs
Technical Data
EN 50155 Documentation Compliance Overview
Updated figure
Functional diagram
Added chapter
Inrush Current
MC50M Linux BSP
Configuring the UEFI Firmware for PXE Boot
Managing RTC Time Adjustments
2019-12-19

20MC50M00 E5 2020-10-20 8
About this Document
E4 Corrected chapter
Connecting an Earthing Cable (tightening torque)
Status LEDs
Video (Service)
USB (Service)
SMBus/I2C Devices
Updated figure
Front interfaces
Updated chapter
Technical Data
Cooling Concept
Mounting the MC50M on a DIN Rail
Connecting the Power Supply
Ignition
Inrush Current
Real-Time Clock (RTC)
Updated table
Connector types – Ethernet (8-pin M12 X-coded)
Connector types – RS232/RS422/RS485 (9-pin D-Sub)
2020-02-03
E5 Added chapter
Identification of DIN-Rail Systems
Triggering the BMC Watchdog Directly via CPU GPIO
Linux Support for Individual Functions
Windows Support for Individual Functions
Using Interfaces in RS485 Half-Duplex Mode
Updated chapter
Technical Data
Product Identification
Connecting the Power Supply
Connecting an Earthing Cable
Configuring the Serial Interfaces
Temperature Measurement
Isolation Voltages
Processor Core
Temperature Measurement
Isolation Voltages
Video (Service)
USB (Service)
SMBus/I2C Devices
2020-10-20
Issue Comments Date

20MC50M00 E5 2020-10-20 9
About this Document
Conventions
Indicates important information or warnings concerning situations which
could result in personal injury, or damage or destruction of the
component.
Indicates important information concerning electrostatic discharge which
could result in damage or destruction of the component.
Indicates important information or warnings concerning proper
functionality of the product described in this document.
The globe icon indicates a hyperlink that links directly to the Internet.
When no globe icon is present, the hyperlink links to specific information
within this document.
Italics Folder, file and function names are printed in italics.
Comment Comments embedded into coding examples are shown in green text.
IRQ#
/IRQ
Signal names followed by a hashtag "#" or preceded by a forward slash "/"
indicate that this signal is either active low or that it becomes active at a
falling edge.
In/Out Signal directions in signal mnemonics tables generally refer to the
corresponding board or component, "in" meaning "to the board or
component", "out" meaning "from the board or component".
0xFF Hexadecimal numbers are preceded by "0x".
0b1111 Binary numbers are preceded by "0b".

20MC50M00 E5 2020-10-20 10
Product Safety
Product Safety
Read the user manual carefully before using the product. Keep the user manual for later
reference.
Conditions for Use, Field of Application
The product is designed to function correctly in the market, application area and
environmental conditions specified in the applicable standards which are listed in the
Technical Data.
Use cases in environments exceeding the specifications in the applicable standards and
the Technical Data have to be agreed upon between duagon and the customer.
The product is not suitable for use in areas where children might be present.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified for the specific task in accordance with the relevant documentation,
in particular its warning notices and safety instructions. Qualified personnel are those
who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Electrostatic Discharge (ESD)
Computer boards and components contain electrostatic sensitive devices.
Electrostatic discharge (ESD) can damage components. To protect the PCB
and other components against damage from static electricity, follow some
precautions whenever you work on your computer.
Power down and unplug your computer system when working on the
inside.
Hold components by the edges and try not to touch the IC chips, leads,
or circuitry.
Use a grounded wrist strap before handling computer components.
Place components on a grounded antistatic pad or on the bag that came
with the component whenever the components are separated from the
system.
Only store the product in its original ESD-protected packaging. Retain
the original packaging in case you need to return the product to duagon
for repair.