Sirius Satellite Radio TagBoard DDT-A User manual

Sirius TagBoard
Revision: 0.61
July 24, 2014

TagBoard
version date author description sirLinux ver
0.60 25/05/2014 Marco Trentarossi first delivery -
0.61 23/07/2014 Francesco Trentarossi FCC / Industry Canada statements -
Table 1: revision history
2 Sirius Electronic Systems s.r.l.

Contents
1 General information 5
1.1 Operational description ........................................ 5
2 Hardware 6
2.1 Introduction ............................................... 6
2.2 Product images ............................................. 7
2.3 Configuration .............................................. 7
2.4 Specifications .............................................. 8
2.4.1 Power supply .......................................... 8
2.4.2 UART Ports ............................................ 8
2.4.3 Ethernet Ports .......................................... 8
2.4.4 CAN Ports ............................................ 9
2.4.5 Status Indicators ........................................ 9
2.4.6 Protections ............................................ 9
2.4.7 Mechanical & Environmental ................................ 9
2.4.8 Agency Conformance .................................... 10
2.5 Lights ................................................... 11
2.6 ACM informative panel ........................................ 12
2.7 Selectors ................................................. 14
2.8 Micro SD slot ............................................... 15
2.9 Connections ............................................... 16
2.9.1 CON8 - Power supply ..................................... 17
2.9.2 CON10 - Serial ports ...................................... 17
2.9.3 CON12- CANopen CAN 0 ................................... 18
2.9.4 CON13 - CANopen CAN 1 .................................. 18
2.9.5 CON14 - CANopen CAN 2 .................................. 20
2.9.6 CON15 - Double USB 2.0 connector ............................. 20
2.9.7 J1/J2 - Ethernet Hub ...................................... 20
2.10 Dip-switch ................................................ 21
2.10.1 Address selection ........................................ 21
2.10.2 Communication speed selection .............................. 22
3

TagBoard
3 Software 24
3.1 Operating system ............................................ 24
3.2 Device Drivers .............................................. 25
3.3 Real-Time constraints .......................................... 25
3.4 Development Environment ...................................... 26
3.4.1 IDE ................................................. 26
3.4.2 Repository ............................................ 26
3.4.3 Debug .............................................. 26
3.5 Update .................................................. 26
3.6 Licenses ................................................. 27
4 Sirius Electronic Systems s.r.l.

Chapter 1
General information
1.1 Operational description
Sirius DDT TAGBOARD is an industrial computer, with real time capabilities, based on MPC5125; directly
powered at 24Vdc.
The operating system that comes with it is UNIX-LIKE and is based on the linux kernel. The distribution is
an OpenEmbedded / Yocto derivative and allows the management of applications through packets.
Thanks to the Xenomai scheduler, you can create tasks with real-time characteristics entirely in userspace.
Peripherals include two Ethernet devices, three CAN channels and two optocoupled serial ports.
5

Chapter 2
Hardware
2.1 Introduction
Sirius TagBoard DDT is a real time industrial computer.
The microprocessor is a MPC5125 PowerPC with a clock frequency of 400MHz, coupled with a 16-bit
PIC co-processor for the management of some non-critical tasks.
There are 256MB of DDR2 RAM, 8MB NOR for the kernel and boot, 2GB eMMC for the file system, 128kB
SRAM with battery backup and 1GB or 4GB NAND.
DDT has following communication interfaces:
• 3 optocoupled CANopen ports
• 1 10/100 ethernet port
• 1 three way 10/100 ethernet switch
• 2 optocoupled serial ports, configurables as RS232, 485 o 422 according to wiring
• 2 USB 2.0 ports
• 1 programmable dot matrix informative panel
• 1 microSD card slot
6

TagBoard
2.2 Product images
Figure 2.1: DDT-A
2.3 Configuration
Description
CPU CPU MPC5125 400MHz
COPROCESSOR PIC 24HJ64GP506 16bit
RAM 256 MB DDR2
iNTERNAL STORAGE 1-4GB NAND Flash
2GB eMMC
128kB SRAM
STORAGE microSD card slot
COMMUNICATION 4 RJ45 Ethernet ports
2 USB 2.0 type A ports
2 RS232/485/422 COM ports
3 CANopen ports
POWER SUPPLY 24Vdc optocoupled
ADDITIONAL FEAT. 7x5 Dot matrix display
Sirius Electronic Systems s.r.l. 7

TagBoard
2.4 Specifications
2.4.1 Power supply
DDT-A
Input Voltage 16-34Vdc
2.4.2 UART Ports
DDT-A
Number 2
Type RS232 - RS485 - RS422 cable select
2.4.3 Ethernet Ports
DDT-A
ETH0 1x RJ45 Ethernet port 10/100
ETH1 3x RJ45 Ethernet switch 10/100
Ethernet
MAC
CPU
SwitchC ontroller
On-ChipF rameB uffers
MII-SW
10/100
PH 5
MII-P5
10/100
MAC 1
10/100
MAC 2
10/100
MAC 3
10/100
MAC 4
10/100
MAC 5
10/100
PH 1
10/100
PH 2
10/100
PH 3
10/100
PH 4
SPI/GPIO
SPI
Ethernet
MAC
1
0
Figure 2.2: Ethernet configuration
8 Sirius Electronic Systems s.r.l.

TagBoard
2.4.4 CAN Ports
DDT-A
Number 3
Type 3 CANopen Master/Slave selectable
Signals CANH, CANL, GND
Insulation CAN interface circuits and +5 Vdc supply for CAN are optically
insulated from CPU
Format CAN V2.0b physical layer for high-speed connection compliant
Data in according CANopen CIA DS301
Address selection 1 channel is determined by dip-switch
Stub 121 ohm hardware selectable
2.4.5 Status Indicators
DDT-A
CAN status green and red leds, in according with CAN indicator specification
DR303-3
NAND status Solid red when NAND is used
Power ON Solid green when power on
PIC status Flashing red when Co-processor is operating
ACM matrix Customizable 5x7 led dot matrix
2.4.6 Protections
DDT-A
Reverse polarity logic circuit, serie diode
power circuit, serie diode
Short circuit logic circuit, 500mA fuse
2.4.7 Mechanical & Environmental
DDT-A
Size (L x W) 160 x 114 mm
Height 15 mm
Weight 161 g
Ambient temperature 0 to +45 ºC operating, -40 to +85 ºC storage
Humidity 0 to 95%, non condensing
Sirius Electronic Systems s.r.l. 9

TagBoard
2.4.8 Agency Conformance
DDT-A
CE CE compliant
61000_6_4 Generic standards - Emission Standard for industrial environments
61000_6_2 Generic standards - Immunity for industrial environments
ROHS ROHS Compliant
10 Sirius Electronic Systems s.r.l.

TagBoard
2.5 Lights
There are three active leds to indicate the status of the board.
CON13
CON15
CON12 CON14
S1
JP2
S2
L11 J1
J2
CON10
JP_USB
L27 L49
U103
L3
C72
L6
J29
U76
J30
U19
U20
U21
CON9
J15
R733 R731
U23
U24
C261
C16
U61 U58 U62 U60
C71 C76
DL6
DL7
R774
R776
C17
C81
R497 R495
C402
C264
C265
C267
C260
S3
C560
C485
R773
C561
C286
X7
C563 C564
R738
R734
C492
R735
J19
U106
U85
OP38
OP36
OP40 OP26 OP27 OP28
P1
R764
C570
U128
C572
U109
R798 R742
R741
X3
C487 C488
U102
DL5
R403 C5
R406
C136
C168
C355 C275
RR24
OP41
R515
R779
C567
C574
C577 C573
R786
R780
R785
C575
C539
R758
U71
C283
X1
L20
C174
R651
C175
R672
C169
R701
C167
C165
L19 L21
VDR1
F1
CON8
J5 J4
R771
R772
C576 C571
R784
R787
DL3
R364 R301
DL2
R500
TP12
C284
C148 C164
R652 C171 C173 C177
C170
CE78
U78
JP1
J39
D60
D61
C137
C149
C14
C166
C144 R654
C484 C483
X6
R343
R770
C20
R541
R286
C19
R719 C6
C142
U1
R752
R682
L22
R427
U77
R745
C29
C197
C9
U41
C201
C143
R635 R648 R649
C141
R645
R640
R647 R641
R695
R743
R684
C139
R693
CE79
C412
MF11
R428
R429
U32
R756
J42
C147
C138
C135
C176 R643 R644
C162
R632
R642 R646 R631
C583
C439 C434
R552
TP11
D51
L51
CU107
L16
C172
R616
L45
C477
R551
R548
C437
C435
U30
U43
TP7
SW1
R617
R514
U96
C425
CE109
C436
C428
C476
U79
R545
R544
R550
U31
J16
R510
TP6
C613
C470
C582
L44
R547
R549
R546
C461
C426
TP10
T1
C408
C410
R513 C409
U90
R512
U97
R619 R620 R618
C581
C430
C423
C427
C372
U75
R511
C559
TP8
TP4
L29
C472
R438
R435
R543
C366
C422
L43
C205
C206
U88
J41
BT1A
L47
C453
C455
R553
R490
U3
R557
R744
R559
C416
CE83
C360
C357
U82
R763
R436
R434
J3
J10
C406
J6
C584
D59 C442
TP9
C580
L30
C471
R443
R542
C359
C419
CE106
CE82
J28
J40
TP5
TP2 C420 R440
C358
TP3
DDT_REL03 SIRIUS ES IT
BA BA BA
B
B
B
A
A
A
P
1
A
A
BA
14
12/11/12
BA
B
Figure 2.3: Lights position
LED Color Description
DL2RED On when accessing NAND memory
DL3GREEN On when 5Vdc power supply is present
DL5RED Blinks when co-processor is operating
DL6GREEN -
DL7GREEN -
Sirius Electronic Systems s.r.l. 11

TagBoard
2.6 ACM informative panel
There is a programmable information panel called ACM. Its location is shown in Figure 2.4
CON13
CON15
CON12 CON14
S1
JP2
S2
L11 J1
J2
CON10
JP_USB
L27 L49
U103
L3
C72
L6
J29
U76
J30
U19
U20
U21
CON9
J15
R733 R731
U23
U24
C261
C16
U61 U58 U62 U60
C71 C76
DL6
DL7
R774
R776
C17
C81
R497 R495
C402
C264
C265
C267
C260
S3
C560
C485
R773
C561
C286
X7
C563 C564
R738
R734
C492
R735
J19
U106
U85
OP38
OP36
OP40 OP26 OP27 OP28
P1
R764
C570
U128
C572
U109
R798 R742
R741
X3
C487 C488
U102
DL5
R403 C5
R406
C136
C168
C355 C275
RR24
OP41
R515
R779
C567
C574
C577 C573
R786
R780
R785
C575
C539
R758
U71
C283
X1
L20
C174
R651
C175
R672
C169
R701
C167
C165
L19 L21
VDR1
F1
CON8
J5 J4
R771
R772
C576 C571
R784
R787
DL3
R364 R301
DL2
R500
TP12
C284
C148 C164
R652 C171 C173 C177
C170
CE78
U78
JP1
J39
D60
D61
C137
C149
C14
C166
C144 R654
C484 C483
X6
R343
R770
C20
R541
R286
C19
R719 C6
C142
U1
R752
R682
L22
R427
U77
R745
C29
C197
C9
U41
C201
C143
R635 R648 R649
C141
R645
R640
R647 R641
R695
R743
R684
C139
R693
CE79
C412
MF11
R428
R429
U32
R756
J42
C147
C138
C135
C176 R643 R644
C162
R632
R642 R646 R631
C583
C439 C434
R552
TP11
D51
L51
CU107
L16
C172
R616
L45
C477
R551
R548
C437
C435
U30
U43
TP7
SW1
R617
R514
U96
C425
CE109
C436
C428
C476
U79
R545
R544
R550
U31
J16
R510
TP6
C613
C470
C582
L44
R547
R549
R546
C461
C426
TP10
T1
C408
C410
R513 C409
U90
R512
U97
R619 R620 R618
C581
C430
C423
C427
C372
U75
R511
C559
TP8
TP4
L29
C472
R438
R435
R543
C366
C422
L43
C205
C206
U88
J41
BT1A
L47
C453
C455
R553
R490
U3
R557
R744
R559
C416
CE83
C360
C357
U82
R763
R436
R434
J3
J10
C406
J6
C584
D59 C442
TP9
C580
L30
C471
R443
R542
C359
C419
CE106
CE82
J28
J40
TP5
TP2 C420 R440
C358
TP3
DDT_REL03 SIRIUS ES IT
BA BA BA
B
B
B
A
A
A
P
1
A
A
BA
14
12/11/12
BA
B
Figure 2.4: ACM panel position
Information panel is made of:
• 5x7 dot matrix display with customizable messages
• Three led pairs that provide CAN status information
Figure 2.5: ACM panel view
12 Sirius Electronic Systems s.r.l.

TagBoard
LED Colore Description
DL1GREEN CAN 1 Status Led
DL2RED CAN 1 Error Led
DL3GREEN CAN 2 Status Led
DL4RED CAN 2 Error Led
DL5GREEN CAN 3 Status Led
DL6RED CAN 3 Error Led
The specifications of lights during operation of the device reflect what indicated in the document
CiA DR 303-3 v1.2.
5x7 dot matrix panel D1 is programmable in order to create custom messages.
Co processor operates the matrix following a map of bits positioned in the CPU.
Sirius Electronic Systems s.r.l. 13

TagBoard
2.7 Selectors
CON13
CON15
CON12 CON14
S1
JP2
S2
L11 J1
J2
CON10
JP_USB
L27 L49
U103
L3
C72
L6
J29
U76
J30
U19
U20
U21
CON9
J15
R733 R731
U23
U24
C261
C16
U61 U58 U62 U60
C71 C76
DL6
DL7
R774
R776
C17
C81
R497 R495
C402
C264
C265
C267
C260
S3
C560
C485
R773
C561
C286
X7
C563 C564
R738
R734
C492
R735
J19
U106
U85
OP38
OP36
OP40 OP26 OP27 OP28
P1
R764
C570
U128
C572
U109
R798 R742
R741
X3
C487 C488
U102
DL5
R403 C5
R406
C136
C168
C355 C275
RR24
OP41
R515
R779
C567
C574
C577 C573
R786
R780
R785
C575
C539
R758
U71
C283
X1
L20
C174
R651
C175
R672
C169
R701
C167
C165
L19 L21
VDR1
F1
CON8
J5 J4
R771
R772
C576 C571
R784
R787
DL3
R364 R301
DL2
R500
TP12
C284
C148 C164
R652 C171 C173 C177
C170
CE78
U78
JP1
J39
D60
D61
C137
C149
C14
C166
C144 R654
C484 C483
X6
R343
R770
C20
R541
R286
C19
R719 C6
C142
U1
R752
R682
L22
R427
U77
R745
C29
C197
C9
U41
C201
C143
R635 R648 R649
C141
R645
R640
R647 R641
R695
R743
R684
C139
R693
CE79
C412
MF11
R428
R429
U32
R756
J42
C147
C138
C135
C176 R643 R644
C162
R632
R642 R646 R631
C583
C439 C434
R552
TP11
D51
L51
CU107
L16
C172
R616
L45
C477
R551
R548
C437
C435
U30
U43
TP7
SW1
R617
R514
U96
C425
CE109
C436
C428
C476
U79
R545
R544
R550
U31
J16
R510
TP6
C613
C470
C582
L44
R547
R549
R546
C461
C426
TP10
T1
C408
C410
R513 C409
U90
R512
U97
R619 R620 R618
C581
C430
C423
C427
C372
U75
R511
C559
TP8
TP4
L29
C472
R438
R435
R543
C366
C422
L43
C205
C206
U88
J41
BT1A
L47
C453
C455
R553
R490
U3
R557
R744
R559
C416
CE83
C360
C357
U82
R763
R436
R434
J3
J10
C406
J6
C584
D59 C442
TP9
C580
L30
C471
R443
R542
C359
C419
CE106
CE82
J28
J40
TP5
TP2 C420 R440
C358
TP3
DDT_REL03 SIRIUS ES IT
BA BA BA
B
B
B
A
A
A
P
1
A
A
BA
14
12/11/12
BA
B
J31
J32
J35
J36
Figure 2.6: Location of selectors
Selector Description
J31 CAN 1 terminating resistor
J32 CAN 2 terminating resistor
J35 UART0 terminating resistor when in RS485 mode
J36 UART1 terminating resistor when in RS485 mode
14 Sirius Electronic Systems s.r.l.

TagBoard
2.8 Micro SD slot
CON13
CON15
CON12 CON14
S1
JP2
S2
L11 J1
J2
CON10
JP_USB
L27 L49
U103
L3
C72
L6
J29
U76
J30
U19
U20
U21
CON9
J15
R733 R731
U23
U24
C261
C16
U61 U58 U62 U60
C71 C76
DL6
DL7
R774
R776
C17
C81
R497 R495
C402
C264
C265
C267
C260
S3
C560
C485
R773
C561
C286
X7
C563 C564
R738
R734
C492
R735
J19
U106
U85
OP38
OP36
OP40 OP26 OP27 OP28
P1
R764
C570
U128
C572
U109
R798 R742
R741
X3
C487 C488
U102
DL5
R403 C5
R406
C136
C168
C355 C275
RR24
OP41
R515
R779
C567
C574
C577 C573
R786
R780
R785
C575
C539
R758
U71
C283
X1
L20
C174
R651
C175
R672
C169
R701
C167
C165
L19 L21
VDR1
F1
CON8
J5 J4
R771
R772
C576 C571
R784
R787
DL3
R364 R301
DL2
R500
TP12
C284
C148 C164
R652 C171 C173 C177
C170
CE78
U78
JP1
J39
D60
D61
C137
C149
C14
C166
C144 R654
C484 C483
X6
R343
R770
C20
R541
R286
C19
R719 C6
C142
U1
R752
R682
L22
R427
U77
R745
C29
C197
C9
U41
C201
C143
R635 R648 R649
C141
R645
R640
R647 R641
R695
R743
R684
C139
R693
CE79
C412
MF11
R428
R429
U32
R756
J42
C147
C138
C135
C176 R643 R644
C162
R632
R642 R646 R631
C583
C439 C434
R552
TP11
D51
L51
CU107
L16
C172
R616
L45
C477
R551
R548
C437
C435
U30
U43
TP7
SW1
R617
R514
U96
C425
CE109
C436
C428
C476
U79
R545
R544
R550
U31
J16
R510
TP6
C613
C470
C582
L44
R547
R549
R546
C461
C426
TP10
T1
C408
C410
R513 C409
U90
R512
U97
R619 R620 R618
C581
C430
C423
C427
C372
U75
R511
C559
TP8
TP4
L29
C472
R438
R435
R543
C366
C422
L43
C205
C206
U88
J41
BT1A
L47
C453
C455
R553
R490
U3
R557
R744
R559
C416
CE83
C360
C357
U82
R763
R436
R434
J3
J10
C406
J6
C584
D59 C442
TP9
C580
L30
C471
R443
R542
C359
C419
CE106
CE82
J28
J40
TP5
TP2 C420 R440
C358
TP3
DDT_REL03 SIRIUS ES IT
BA BA BA
B
B
B
A
A
A
P
1
A
A
BA
14
12/11/12
BA
B
Figure 2.7: MicroSD slot location
The position of the MicroSD cage slot is shown in figure 2.7
Sirius Electronic Systems s.r.l. 15

TagBoard
2.9 Connections
CON13
CON15
CON12 CON14
S1
JP2
S2
L11 J1
J2
CON10
JP_USB
L27 L49
U103
L3
C72
L6
J29
U76
J30
U19
U20
U21
CON9
J15
R733 R731
U23
U24
C261
C16
U61 U58 U62 U60
C71 C76
DL6
DL7
R774
R776
C17
C81
R497 R495
C402
C264
C265
C267
C260
S3
C560
C485
R773
C561
C286
X7
C563 C564
R738
R734
C492
R735
J19
U106
U85
OP38
OP36
OP40 OP26 OP27 OP28
P1
R764
C570
U128
C572
U109
R798 R742
R741
X3
C487 C488
U102
DL5
R403 C5
R406
C136
C168
C355 C275
RR24
OP41
R515
R779
C567
C574
C577 C573
R786
R780
R785
C575
C539
R758
U71
C283
X1
L20
C174
R651
C175
R672
C169
R701
C167
C165
L19 L21
VDR1
F1
CON8
J5 J4
R771
R772
C576 C571
R784
R787
DL3
R364 R301
DL2
R500
TP12
C284
C148 C164
R652 C171 C173 C177
C170
CE78
U78
JP1
J39
D60
D61
C137
C149
C14
C166
C144 R654
C484 C483
X6
R343
R770
C20
R541
R286
C19
R719 C6
C142
U1
R752
R682
L22
R427
U77
R745
C29
C197
C9
U41
C201
C143
R635 R648 R649
C141
R645
R640
R647 R641
R695
R743
R684
C139
R693
CE79
C412
MF11
R428
R429
U32
R756
J42
C147
C138
C135
C176 R643 R644
C162
R632
R642 R646 R631
C583
C439 C434
R552
TP11
D51
L51
CU107
L16
C172
R616
L45
C477
R551
R548
C437
C435
U30
U43
TP7
SW1
R617
R514
U96
C425
CE109
C436
C428
C476
U79
R545
R544
R550
U31
J16
R510
TP6
C613
C470
C582
L44
R547
R549
R546
C461
C426
TP10
T1
C408
C410
R513 C409
U90
R512
U97
R619 R620 R618
C581
C430
C423
C427
C372
U75
R511
C559
TP8
TP4
L29
C472
R438
R435
R543
C366
C422
L43
C205
C206
U88
J41
BT1A
L47
C453
C455
R553
R490
U3
R557
R744
R559
C416
CE83
C360
C357
U82
R763
R436
R434
J3
J10
C406
J6
C584
D59 C442
TP9
C580
L30
C471
R443
R542
C359
C419
CE106
CE82
J28
J40
TP5
TP2 C420 R440
C358
TP3
DDT_REL03 SIRIUS ES IT
BA BA BA
B
B
B
A
A
A
P
1
A
A
BA
14
12/11/12
BA
B
Figure 2.8: DDT-A connectors
1 2 3 4 5
6 7 8 9
1 2 3 4 5
6 7 8 9
Figure 2.9: DDT-A communication ports
16 Sirius Electronic Systems s.r.l.

TagBoard
The connectors are distributed on the perimeter of the card occupying two sides. All coomunication
ports are located on the long side of the card, while the power supply connector is located laterally.
2.9.1 CON8 - Power supply
12345
678910
Figure 2.10: MICROFIT 3.0 430451000
pin name type description
1 comune - 0V power supply reference
2 24V IN 24V power supply
3 GND - ground
4 NC - not connected
5 WDO - OUT negative side watchdog
6 comune - 0V power supply reference
7 24V IN 24V power supply
8 GND - ground
9 NC - not connected
10 WDO + OUT positive side watchdog
2.9.2 CON10 - Serial ports
1 2 3 4 5
6 7 8 9
1 2 3 4 5
6 7 8 9
CON10-B
CON10-A
Figure 2.11: DSUB 9PINS
Sirius Electronic Systems s.r.l. 17

TagBoard
pin name type description
1 NC - Not connected
2 RXD IN Receive data 232
3 TXD OUT Transmit data 232
4 NC - Not connected
5 GND - Ground
6 VC RX + IN Receive data 422 +
7 VC TX + OUT Transmit data 422 +
8 VC RX - IN Receive data 422 -
9 VC TX - OUT Transmit data 422 -
RS485 communication is cable dependent
2.9.3 CON12- CANopen CAN 0
1234
5678
Figure 2.12: MICROFIT 3.0 430450800
pin name type description
1-5 CH+ IN/OUT CAN high
2-6 CH- IN/OUT CAN low
3-7 CAN
reference
- 0V CAN reference
4-8 CAN
reference
- 0V CAN reference
2.9.4 CON13 - CANopen CAN 1
1234
5678
Figure 2.13: MICROFIT 3.0 430450800
18 Sirius Electronic Systems s.r.l.

TagBoard
pin name type description
1-5 CH+ IN/OUT CAN high
2-6 CH- IN/OUT CAN low
3-7 CAN
reference
- 0V CAN reference
4-8 CAN
reference
- 0V CAN reference
Sirius Electronic Systems s.r.l. 19

TagBoard
2.9.5 CON14 - CANopen CAN 2
1234
5678
Figure 2.14: MICROFIT 3.0 430450800
pin name type description
1-5 CH+ IN/OUT CAN high
2-6 CH- IN/OUT CAN low
3-7 CAN
reference
- 0V CAN reference
4-8 CAN
reference
- 0V CAN reference
2.9.6 CON15 - Double USB 2.0 connector
Figure 2.15: USB 2.0 TYPE A
pin name type description
1 Vbus OUT + 5Vdc
2 D - IN/OUT Data -
3 D + IN/OUT Data +
4 GND - Ground
2.9.7 J1/J2 - Ethernet Hub
Figure 2.16: 10/100 RJ45 ETHERNET FOUR PORTS
20 Sirius Electronic Systems s.r.l.