here.

Sixnet
ET-8MS-OEM
Board Level Managed Switch for
Embedded OEM Applications
Engineering Tech Note
Notice: This document contains proprietary, confidential information owned by SIXNET, LLC and is protected as
an unpublished work under the Copyright Law of the United States. No part of this document may be
copied, disclosed to others or used for any purpose without the written permission of SIXNET, LLC.
1.0
Abstract/Overview
This document defines the board level managed switch with part number ET-8MS-OEM. This board is
designed for embedded OEM applications.
1.1
1.2
Glossary
OEM
Original Equipment Supplier
COTS
Commercial Off-The-Shelf – The ET-8MS-OEM is ideal for COTS applications
Board Level
The ET-8MS-OEM is a board level product meaning that it is supplied as fully populated
and functional circuit board that is designed to be integrated into a final application. It
does not come with any enclosure or mounting standoffs. It incorporates mounting holes
to facilitate installation as a “piggy-back” board on another circuit board assembly.
SMI
PHY
Serial management interface
Physical interface for the Ethernet magnetics
References
Managed Switch Software User Manual:
http://www.sixnetio.com/html_files/manuals/managed%20switch%20software%20manual.pdf
The ET-8MS-OEM shares common firmware with SIXNET’s standard packaged managed switches such as
the SLX-5MS, SLX-8MG and SLX-10MG. Therefore, it supports the same advanced software features.
2.0
Product Brief
The ET-8MS-OEM is a board level managed Ethernet switch, suitable for incorporation into electronic
assemblies for commercial, industrial or military OEM applications.
ET-8MS-OEM Technical Note
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3.0
Technical Specifications
3.1 General Hardware Features
The ET-8MS-OEM has the following hardware features:
• IEEE 802.3 Switch IC (manageable) and CPU for network management functionality
• Eight available Ethernet ports with on-board PHYs and magnetics.
• Two available Ethernet ports which require external PHY and magnetics
• The J2 board-to-board connector also has these signals:
o Port 1-8 Status LED signals
o OK (alarm) output signal
o Status LED output signal
o 3.3VDC Power lines
• The J11 board-to-board connector has these signals:
o RS232 serial management interface with LVTTL (3.3V) signals (TD and RD only)
o USB device interface shared with Mini-B USB connector on-board.
o Serial LED interface available for remote LED (Please contact Sixnet).
o CPU reset line input/output
o PHY reset Line output
o OK (alarm) output signal
o Status LED output signal
o Power and GND lines
• Requires user supplied power of regulated 5VDC or 3.3 VDC at approximately 6 Watts
• Four #4 mounting holes connected to isolation guard rings and external connection to Earth ground
• Optional LEDs for each port for diagnostic purposes
3.1.1 Ordering information and board options
Orderable PN
ET-8MS-OEM-1
ET-8MS-OEM-1-3
ET-8MS-OEM-2
ET-8MS-OEM-2-3
Board to board
connector
√
√
√
√
ET-8MS-OEM Technical Note
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Molex wire
connectors
√
√
5V operation only
Release 03
3.3V operation only
√
√
√
√
21-Dec-10
3.2 General Software Features
The ET-8MS-OEM has all the following software capabilities:
• IEEE 802.3 (10 Mbps) and 802.3u (100 Mbps) compatible
• IEEE 802.3x for half/full duplex and flow control
• IEEE 802.1D-2004 - Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP)
o Allows for ring, mesh and other redundant topologies
• IEEE 802.1p for priority queuing (QoS and CoS)
• IEEE 802.1Q for Virtual Local Area Networks (VLANs)
• SNMP and RMON for network management
• SNMPv3 for network management with security
• Port mirroring for diagnostics
• Management interfaces via web, terminal and telnet
• Web interface supports HTTPS security with SSL or TLS
• Command line interface for the following parameters:
o Reset to factory defaults
o DHCP enable / disable
o Set IP address
o Set subnet mask
o Set default gateway
o Set system name
o RSTP enable / disable
o Set bridge priority for RSTP
o Set maximum age for RSTP
o Set hello time for RSTP
o Set forward delay for RSTP
o Set transmission limit for RSTP
o SNMP enable / disable
o Telnet enable / disable
o Other commands may be provided at SIXNET’s discretion
• Other software features may be provided at SIXNET’s discretion
Note: Other software features not listed
3.3 Firmware
The ET-8MS-OEM is pre-installed with SIXNET managed switch firmware which provides the software
capabilities as previously described. SIXNET periodically releases firmware updates that may include
performance improvements, bug fixes and/or new features.
These firmware updates are typically supplied in two formats:
1. Full Firmware Image File – This can be loaded from one of SIXNET’s Microsoft Windows
utilities. It will completely replace the operating system and firmware and set all parameters back
to the factory defaults. This method requires both an Ethernet and serial connection to the switch.
2. Firmware Update File – This is a tarball (.tgz) file that can be loaded from the web or terminal
interface’s Update Firmware screen. It typically will update the switch firmware from one version
to the next. It typically will retain the switches parameters so the switch configuration does not
need to be reloaded afterwards.
ET-8MS-OEM Technical Note
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3.4 Connectors
Ports 1-8 may be accessed either through individual 4 pin connectors named Port 1 to Port 8 or through the J2
Board-to-Board 0.8mm pitch 2x35 pin female header. See section 3.1.1 for orderable part numbers and
options.
3.4.1
Port 1-8 Connectors pin designation
The Ethernet connectors consist of 4 pins. They are specified to be the Molex 70543-0003. There is one
Molex 70543-0003 connector for each port and the pin-out is as follows:
Pin
#
1
2
3
4
Signal
TX+
TXRX+
RX-
Molex 70543-0003 Connector Description:
2.54mm (.100") Pitch SL™ Header, Single Row, Vertical, .120" Pocket, Shrouded, 4 Circuits, 0.38µm (15µ")
Gold (Au) Selective Plating, Tin (Sn) PC Tail Plating, RoHS
Molex 70543-0003 Mechanical
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3.4.2
Board-to-Board J2 header connector pin designation
The 0.8mm pitch Ethernet connector consists of 70 pins (2 rows of 35 pins). It is specified to be the Samtec
CLE-135-01-G-DV-A. The pin-out is as follows: (NC = no connection)
Pin #
Signal
Pin#
Signal
Reference
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
+3.3V
OK LED / DO
SPEED100 LED
SPEED100 LED
SPEED100 LED
SPEED100 LED
SPEED100 LED
SPEED100 LED
SPEED100 LED
SPEED100 LED
NC
NC
RX+
RXNC
RX+
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
+3.3V
STATUS LED
LINK/ACT LED
LINK/ACT LED
LINK/ACT LED
LINK/ACT LED
LINK/ACT LED
LINK/ACT LED
LINK/ACT LED
LINK/ACT LED
NC
NC
TX+
TXNC
TX+
LED drive
Status
PORT 1
PORT 2
PORT 3
PORT 4
PORT 5
PORT 6
PORT 7
PORT 8
33
RX-
34
TX-
PORT 2
35
37
NC
RX+
36
38
NC
TX+
PORT 3
39
RX-
40
TX-
PORT 3
41
43
NC
RX+
42
44
NC
TX+
PORT 4
45
RX-
46
TX-
PORT 4
47
49
NC
RX+
48
50
NC
TX+
PORT 5
51
RX-
52
TX-
PORT 5
53
55
NC
RX+
54
56
NC
TX+
PORT 6
57
RX-
58
TX-
PORT 6
59
61
NC
RX+
60
62
NC
TX+
PORT 7
63
RX-
64
TX-
PORT 7
65
67
NC
RX+
66
68
NC
TX+
PORT 8
69
RX-
70
TX-
PORT 8
ET-8MS-OEM Technical Note
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PORT 1
PORT 1
PORT 2
21-Dec-10
Samtec CLE-135-01-G-DV-A connector description:
0.80mm (.0315”) pitch female connector, SMT, with alignment pins, 70 circuits, RoHS
Samtec CLE-135-01-G-DV-A Mechanical
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3.4.3
Board-to-Board J11 header connector pin designation
The 0.8mm pitch Ethernet connector consists of 70 pins (2 rows of 35 pins). It is specified to be the Samtec
CLE-135-01-G-DV-A. The pin-out is as follows:
Note: RESERVED-NC = Reserved, do not connect, leave open.
Pin #
Signal
Pin#
Signal
1
3
5
7
9
11
13
15
+3.3V
RESERVED - NC
+3.3V
RESERVED - NC
+3.3V
RESERVED - NC
+3.3V
RESERVED - NC
2
4
6
8
10
12
14
16
GND
GND
GND
RESERVED - NC
GND
RESERVED - NC
GND
RESERVED - NC
17
19
21
RESERVED - NC
+3.3V
RESERVED - NC
18
20
22
RESERVED - NC
GND
RESERVED - NC
23
25
27
24
26
28
RESERVED - NC
GND
RESERVED - NC
30
RESERVED - NC
32
RESERVED - NC
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
RESERVED - NC
+3.3V
Pull-up to +3.3V through a
4.7K Ohm resistor
Pull-up to +3.3V through a
4.7K Ohm resistor
Pull-up to +3.3V through a
4.7K Ohm resistor
RESERVED - NC
+3.3V
RESERVED - NC
RESERVED - NC
RESERVED - NC
RESERVED - NC
+3.3V
RESERVED - NC
+3.3V
RESERVED - NC
+3.3V
RESERVED - NC
+3.3V
RESERVED - NC
RESERVED - NC
#CPURESET
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
RESERVED - NC
GND
RESERVED - NC
RESERVED - NC
RESERVED - NC
RESERVED - NC
GND
RESERVED - NC
GND
RESERVED - NC
GND
RESERVED - NC
GND
RESERVED - NC
RESERVED - NC
RESERVED - NC
65
67
RS232_TXD
USB_DET
66
68
RS232_RXD
RESERVED - NC
69
USB+
70
USB-
29
31
ET-8MS-OEM Technical Note
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Reference
21-Dec-10
Samtec CLE-135-01-G-DV-A connector description:
0.80mm (.0315”) pitch female connector, SMT, with alignment pins, 70 circuits, RoHS
Samtec CLE-135-01-G-DV-A Mechanical
3.4.4 Power Input
P12 connector is used to supply power to the board. The board supports 5VDC or 3.3VDC input (+/- 5%) on
this connector depending on the model. The maximum current draw of the board is around 6 Watts @ 5VDC
or 3.3VDC.
Note: Do not attempt to power 5VDC models using the 3.3V pins. Damage to the board may occur.
The P12 power input connector consists of 6 pins. It is specified to be the Molex 70543-0005. The pin-out is
as follows:
Power input connector pin-out
Signal name
Pin Number
+3.3V
1
+3.3V
2
GND
3
GND
4
+5V
5
+5V
6
On ET-8MS-OEM-2 models, the board-to-board connector J11 also has power pins that can be used to supply
power using a 3.3VDC regulated Supply.
Note: When J11 board-to-board connector is used to power the ET-8MS-OEM-2, P12 must be left
unconnected. 5VDC supply is not supported on the J11 board-to-board connector.
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3.4.5 On board serial port connector P14
P14 connector allows for an alternate access to the on board RS232 port. There are only three lines brought
out to this connector as shown below:
3.5 Ports 1-8 description
Theses ports are 10/100BASE and have on-board magnetics. They can be directly interfaced to an RJ45
connector as follows:
Signal name
TX+
TXRX+
RX-
RJ45 pin
1
2
3
6
These ports can be accessed through J2 board-to-board connector or through on board Molex 4 pin connectors
depending on the model.
Both connectors cannot be used at the same time for the same port number.
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3.6 Status LED Output and ports 1-8 diagnostic LED’s
These signals are active LOW outputs that can be tied to external LED’s in a sinking configuration (3.3V →
anode of LED → 220 ohm resistor → signal). The Status LED will generally be ON when operation is normal
and flashes when a full firmware image is being loaded. Refer to the SIXNET managed switch software user
manual for more details.
LED’s for ports 1-8 will behave as follows:
Speed LED: On indicates 100Mbps, Off indicates 10Mbps
Act/Link LED: On indicates link, Blink indicates activity
The LED connector pinout is as follows:
Molex PN:70543-0002
Signal name
Link/Act
Speed
3.3V
Pin number
1
2
3
3.7 OK LED / Output
This signal is an active LOW output that can be tied to an external discrete output circuit, an external LED
and/or an external input. It will be ON (supply 3.3V) when operation is normal and go OFF when there is a
fault. Refer to the SIXNET managed switch software user manual for more details.
3.8 CPU Reset Input
This signal is an active low debounced manual reset input. If pulled low it will cause a full reset of the ET8MS-OEM circuit board. The ET-8MS-OEM-2-1 has a built in reset, so this control line would only be used
when another CPU needs to reset the entire ET-8MS-OEM-2-1 board. If this signal is not used, it should be
left unconnected.
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3.9 Mechanical and Mounting
The ET-8MS-OEM has four mounting holes for #4 screws. Refer to the following mechanical diagrams for
board size, connector positions and component heights.
Circuit Board Tolerances:
a) Drill sizes on 0.062” thick boards: plated +0.003/-0.002”; non-plated +0.002/-0.000”
b) Minimum trace width and spacing 0.008 / 0.008 +/- 0.001”
c) Overall board dimensions: +/-0.005”
d) Build specifications in accordance with IPC-600
e) Registration accuracy, layer to layer: +/- 0.003”
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Side View
Bottom Side Height (though view)
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Component Height on Top side
-----------------------------------------------------------------------------
3.10 Temperature
The ET-8MS-OEM has been designed to operate continuously at an ambient temperature of -40 to +75º C or
better.
The ET-8MS-OEM has been designed for full operation after being stored at -40 to 85º C or better.
3.11 Power
The ET-8MS-OEM requires a regulated 3.3 VDC or 5VDC (+/- 5%) to be supplied to the P12 connector.
Alternately, J11 can be used to power the board at 3.3VDC if desired. All 3.3VDC and GND pins must be
connected. Do not supply power to P12 and J11 at the same time.
The ET-8MS-OEM is designed to draw 6 Watts (or less) at 3.3 VDC or 5VDC with ports 1-8 linked at 100
Mbps.
The ET-8MS-OEM will automatically draw less power when ports are not used.
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3.12 Electrical Shielding
The ET-8MS-OEM is designed to meet the CE and FCC requirements for emissions and immunity when
properly installed in an appropriate package. Some of the techniques used to insure this performance are as
follows:
• Chassis ground around perimeter of all layers
• Chassis ground tied to all four mounting holes for grounding to other board or chassis
• Chassis ground tied to Ethernet interface for connection to connectors and/or enclosure
• Separate ground layer
• Separate power layer
• Via fences where necessary
• No digital signals between PHY and Ethernet interface
• No power and ground planes under magnetics
3.13 Maintainability and Reliability
The ET-8MS-OEM is designed using common components and design techniques as other SIXNET industrial
Ethernet switches that have a Mean Time Between Failure (MTBF) of over 1,000,000 hours. This is based on
actual performance numbers of units already in the field. The ET-8MS-OEM is expected to have a similar
reliability. At the time of this writing, insufficient field data exists to certify this in any manner other than
“Type Certification” based upon history of similar products.
The ET-8MS-OEM is not designed to be repaired in the field. The board can be swapped out by unplugging
the Ethernet connector and removing the four mounting screws.
4.0
Production Testing
The ET-8MS-OEM will be delivered fully initialized and tested. All signal lines will be tested on each unit
for proper functionality. This includes:
5.0
•
The eight Ethernet ports connectors
•
Ethernet port on the board-to-board connector
•
General switch IC and CPU functionality
Items Delivered
The ET-8MS-OEM is not delivered with any standoffs or other mounting hardware. The board is the only
deliverable item.
6.0
Revision History of this Document
Revision
01
02
03
Changes
Released, 30-June-09
Update section 3.6. Other corrections. Released, 10/22/09
- Updated ordering and max height information.
- Updated input power options and voltage tolerance
- Added section 3.4.5, RS232 on board connector pinout
Released 12/21/2010
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