SF2 Data Sheet - 2012-08-10
Embedded Solutions
SF2 - 3U 19" 8-Port Managed
Ethernet Switch, PoE, RJ45
The SF2 is a stand-alone, managed industrial Fast
Ethernet switch that comes in a compact 3U, 18HP, 19"
cassette. It provides eight channels at the front
panel accessible through RJ45 connectors.
It is supplied by its integrated, rugged power supply
unit (PSU), with a power connector at the front panel.
The entire switch consumes less than 7 W and needs no
The SF2 is managed by its own PowerPC® CPU that
integrates the management firmware. A service port is
accessible at the front panel on a D-Sub connector,
providing an easy way to configure the switch. A
command line interface is available via the RS232 at
the service port and over Ethernet via Telnet or
Secure Shell (SSH). The switch can also be configured
via SNMP (version 3) and through its HTTP web server.
Additionally, the service connector can be used to
attach an external dongle to store or update the
switch configuration. This makes it easy to exchange
the unit for service purposes.
All of the ports are individually configurable. The
SF2 supports full-duplex and half-duplex operation
with auto-negotiation, high-speed non-blocking store-
3U, 18 HP, 19" rack mountable
8 Fast Ethernet ports on RJ45 connectors
Power over Ethernet PSE functionality
Configuration via web interface, Telnet CLI,
SNMP ver. 3 or external dongle
Service interface via D-Sub
LEDs for port, PoE and board states
Wide input range PSU (14.4 to 154 V), EN
50155 qualified
-40 to +70(+85)°C according to EN 50155
Class Tx with qualified components
and-forward-switching, Quality of Service (QoS)
support with four traffic classes IEEE 802.1p and
three-level 802.1x security as well as the logical
segmentation of ports (802.1q VLANs). The switch is
fault tolerant and restores itself on its own: If a
link is temporarily unavailable, frames can be sent
via backup/redundant links (spanning tree protocol /
link aggregation) and no data loss occurs. Its builtin test mechanisms make the SF2 an even more reliable
component in the communication system.
In addition, the switch can act as Power over Ethernet
(PoE) Power Sourcing Equipment (PSE), supplying other
devices on ports 1 and 2 with power.
The SF2 was specifically designed for rugged mobile
communication systems with high demands. It is thus
for example fully compliant with the EN 50155 railway
standard. All components inside the cassette are
specified for a -40 to +70°C operation temperature
(+85°C for ten minutes according to EN 50155 Class
Tx). There are no socketed components, hardening the
box against shock and vibration. Its PCBs are ready
for coating and the switch has a guaranteed minimum
standard availability of 5 years.
SF2 Data Sheet - 2012-08-10
Embedded Solutions
Technical Data
Switch Fabric Key Features
n Eight 10/100Base-T ports at front panel
o Electrical isolation: 1500 Vrms
n Auto-negotiation
n High-speed non-blocking, store-and-forward switching
n 8K MAC address lookup table with automatic learning and
n QoS (Quality of Service) support with 4 traffic classes
(IEEE 802.1p tagged frames)
n Layer 2 switching
n Back pressure or IEEE802.3x flow control
n Automatic MDI/MDI-X crossover (all ports)
n TCP/IP (IPv4, IPv6)
Management Firmware System Features
n Saving and restoring user configurations
n Software upgrades through TFTP
n System logs (syslog) and e-mail alerts for critical events
n Remote monitoring (RMON) and alarm generation
n Displaying the running configuration in the form of CLI
n DHCP client, server and relay
n Management interfaces through
o CLI (RS232 console, Telnet, SSH)
o SNMP v3
n Switch configuration can be loaded from external dongle
Management Firmware Layer 2 Features
n Transparent bridging
n QoS (DiffServ) and 802.1p traffic prioritization queuing,
polishing, shaping
n VLAN-aware bridging with GARP
n Static and dynamic VLANs (through GVRP)
n Dynamic learning of multicast groups through GMRP
n Rapid Spanning Tree Protocol and Multiple Spanning Tree
Protocol to ensure loop free topology formation
n Reducing multicast traffic in the network through
multicast snooping - IGS (IPv4) and MLDS (IPv6)
n IGMP proxy
n Aggregating physical ports for increasing bandwidth and
redundancy through link aggregation (LACP)
n Link Layer Discovery Protocol (LLDP)
n SNMP (v1, v2c, v3) agent and MIB support, configuration
Management Firmware Security Features
n User authentication using 802.1x
n Controlling management access through SNMP, CLI and web
only from authorized managers
n MAC based and IP based access list (ACL) for traffic
n Rate-limiting and storm control to prevent packet
flooding from malicious peers
Supported Ethernet Standards
n Transparent bridging: IEEE 802.1d, 2004
n VLAN: IEEE 802.1q Rev D5.0, 2005
n Port based VLANs: IEEE 802.1q Rev D5.0, 2005
n GVRP/GMRP support: IEEE 802.1d
n Rapid Spanning Tree Protocol: IEEE 802.1d
n Multiple Spanning Tree: IEEE 802.1s, IEEE 802.1q Rev
D5.0, 2005
n IGMP snooping: draft-ietf-magma-snoop-12.txt
n MLD snooping: draft-ietf-magma-snoop-12.txt
n Link aggregation: IEEE 802.3ad, 2005
n Port based authentification with EAP: IEEE 802.1x REV2004
n Link Layer Discovery Protocol: IEEE 802.1ab, 2005
n Power over Ethernet support: IEEE 802.1af
n Priority based switching: IEEE 802.1p
Power Over Ethernet Features
n Power over Ethernet functions on ports 1 and 2
o PSE (Power Sourcing Equipment) function
o Supplies one PD class 0 device or two PD class 2
devices (up to 15W total)
Service Interface
n 9-pin D-Sub connector at front
n RS232 / V24
n I²C interface for external dongle
Front I/O
n 8 Ethernet ports via RJ45 connectors
n 1 service interface via 9-pin D-Sub plug connector
n 1 power input via mixed 7-pin D-Sub plug connector
n 16 link and activity Ethernet status LEDs (2 per channel)
n 4 Power over Ethernet status LEDs, 2 each for ports 1 and
n Status LEDs for power, reset and error codes
Electrical Specifications
n Power supply unit
o 14.4..154 VDC wide range according to EN 50155
n Isolation (according to EN 50155)
o Input/output: 1500 Vrms
o Input/shield: 1500 Vrms (7W2 D-Sub power connector:
1000 Vrms)
o Output/shield: 1500 Vrms
o Ground/shield: 1500 Vrms
o Service connector: 1000 Vrms
n Power consumption: 24 W (incl. 15 W PoE)
n MTBF: 381,460 h @ 40°C according to IEC/TR 62380 (RDF
SF2 Data Sheet - 2012-08-10
Embedded Solutions
Technical Data
Mechanical Specifications
n 19" rack-mount standard
n Dimensions: 3U, 18HP, 168 mm depth
n Weight: 870 g
Environmental Specifications
n Temperature range (operation):
o -40..+70°C (qualified components, +85°C for ten
minutes according to EN50155 Class Tx)
n Temperature range (storage): -40..+85°C
n Relative humidity (operation): max. 95% non-condensing
n Relative humidity (storage): max. 95% non-condensing
n Altitude: -300 m to + 3,000 m
n Shock: according to EN 60068-2-27
n Bump: according to EN 60068-2-29
n Vibration (sinusoidal): according to EN 60068-2-6
n PCBs manufactured with a flammability rating of 94V-0 by
UL recognized manufacturers
n Tested according to EN 55022 (radio disturbance), EN
61000-4-2 (ESD), EN 61000-4-4 (burst) and EN 61000-4-5
n Firmware for configuration and management included
SF2 Data Sheet - 2012-08-10
Embedded Solutions
SF2 Data Sheet - 2012-08-10
Embedded Solutions
Configuration & Options
Standard Configurations
Article No.
Front Panel
Power over Ethernet
18 HP
Yes (PSE on ports 1 and 2)
18 HP
Yes (PSE on ports 1 and 2)
22 HP
Yes (PSE on ports 1 and 2)
22 HP
Yes (PSE on ports 1 and 2)
Ethernet-powered version without PSU (on request)
n Class 2 Powered Device supplied via Ethernet Port 1
o No internal power supply unit
Environmental specifications
n Conformal coating on request
SF2 Data Sheet - 2012-08-10
Embedded Solutions
Ordering Information
Standard SF2 Models
Managed Switch with 8 Fast Ethernet ports
on RJ45, PoE, PSU, 18HP, -40..+85°C with
qualified components
Related Hardware
I2C dongle for F302, G302 and managed SFxx
switches, 512Kb, D-Sub, -40..+85°C
Unmanaged Switch with 8 Fast Ethernet ports
on RJ45, PSU, 18HP, -40..+85°C with
qualified components
Managed Switch with 8 Fast Ethernet ports
on M12, PoE, PSU, 22HP, -40..+85°C with
qualified components, conformal coating
Unmanaged Switch with 8 Fast Ethernet ports
on M12, PSU, 22HP, -40..+85°C with
qualified components, conformal coating
Miscellaneous Accessories
I2C dongle for F302, G302 and managed SFxx
switches, 512Kb, D-Sub, -40..+85°C
Software: Firmware/BIOS
Ethernet Switch Firmware for managed RSx,
SFx and F302 models
For operating systems not mentioned here contact MEN
SF2/SF3 User Manual
14ETSW-00 Managed Ethernet Switch Firmware
Managed Ethernet Switch Quick Start Guide
Managed Ethernet Switch Command Line
Interface User Manual - Command Reference
For the most up-to-date ordering information and direct
links to other data sheets and downloads, see the SF2
online data sheet under » www.men.de.
SF2 Data Sheet - 2012-08-10
Embedded Solutions
Contact Information
MEN Mikro Elektronik GmbH
Neuwieder Straße 3-7
90411 Nuremberg
Phone +49-911-99 33 5-0
Fax +49-911-99 33 5-901
E-mail info@men.de
MEN Mikro Elektronik SA
18, rue René Cassin
ZA de la Châtelaine
74240 Gaillard
Phone +33 (0) 450-955-312
Fax +33 (0) 450-955-211
E-mail info@men-france.fr
MEN Micro, Inc.
24 North Main Street
Ambler, PA 19002
Phone (215) 542-9575
Fax (215) 542-9577
E-mail sales@menmicro.com
The date of issue stated in this data sheet refers to the Technical Data only. Changes in ordering information given herein do not affect the date of issue.
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consequences of anything, done or omitted to be done by any such person in reliance, whether wholly or partially, on the whole or any part of the contents of the publication.
The correct function of MEN products in mission-critical and life-critical applications is limited to the environmental specification given for each product in the technical
user manual.The correct function of MEN products under extended environmental conditions is limited to the individual requirement specification and subsequent
validation documents for each product for the applicable use case and has to be agreed upon in writing by MEN and the customer.Should the customer purchase or use
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with such unintended or unauthorized use, even if such claim alleges that MEN was negligent regarding the design or manufacture of the part.
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Copyright © 2012 MEN Mikro Elektronik GmbH. All rights reserved.
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