Product Model
FL SWITCH LM 4TX/2FX SM ST

Selling Points
- 1Compact Design: The switch measures 45 mm in width, 99 mm in height, and 112 mm in depth, making it ideal for space-constrained industrial environments.
- 2Robust Connectivity: Equipped with four 10/100 Mbps RJ45 ports and two 10/100 Mbps single-mode fiber optic ST ports for reliable and high-speed data transmission.
- 3Industrial-Grade Durability: Operates within an ambient temperature range of -40 °C to +70 °C and withstands humidity levels up to 95%, ensuring continuous operation in harsh industrial conditions.
- 4Advanced Management Features: Supports web-based management, SNMP, and integrated software for redundant setup, diagnosis, and monitoring using IT standard protocols.
- 5Redundancy and Reliability: Includes Rapid Spanning Tree (IEEE 802.1w) for redundancy and IGMP snooping for efficient network management, ensuring minimal downtime in critical applications.
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Parameter | Value | Parameter | Value |
---|---|---|---|
Width | 45 mm | Height | 99 mm |
Depth | 112 mm | Mounting type | DIN rail mounting |
Connection method | RJ45 | Note on the connection method | Auto negotiation and autocrossing |
Transmission speed | 10/100 Mbps | Transmission physics | Copper |
Transmission length | 100 m (per segment) | No. of channels | 4 (RJ45 ports) |
Connection method | ST | Transmission speed | 100 Mbps (full duplex) |
Transmission physics | Single-mode fiberglass | Transmission length | 36000 m (fiberglass with F-G 9/125 0.36 dB/km)
32000 m (fiberglass with F-G 9/125 0.4 dB/km)
26000 m (fiberglass with F-G 9/125 0.5 dB/km) |
Wavelength | 1300 nm | No. of channels | 2 (ST single mode) |
Connection method | RS-232-C, 6-pos. MINI-DIN socket (PS/2) | Product type | Switch |
Product family | Lean Managed Switch | Type | Block design |
Protection class | III (IEC 61140, EN 61140, VDE 0140-1) | Diagnostic functions | 1:1-Portmirroring |
Basic functions | Store-and-forward switch complies with IEEE 802.3, 2 priority classes according to IEEE 802.1p, TCP/IP protocol, BootP-compatible, port mirroring, integrated web server function, multicast filtering, IGMP snooping, VLAN, Rapid Spanning Tree (RSTP), DHCP server, PTCP filter | PROFINET conformance class | Conformance-Class A |
Filter functions | Quality of Service
VLAN (up to 8 VLANs)
IGMP Query
Auto-Query-Port
Extended Multicast Filtering | Management | Web-based management (HTTP)
SNMP v1/v2
Serial interface (V.24) |
Redundancy | STP (Spanning Tree Protocol)
RSTP (Rapid Spanning Tree Protocol)
FRD (Fast Ring Detection)
Large Tree Support | Status and diagnostic indicators | LEDs: US1, US2 (power supply), Fail (alarm contact), 2 LEDs per Ethernet port (Link/Activity and Speed) |
Supported browsers | Internet Explorer 5.5 or higher | Basic functions | Store-and-forward switch complies with IEEE 802.3, 2 priority classes according to IEEE 802.1p, TCP/IP protocol, BootP-compatible, port mirroring, integrated web server function, multicast filtering, IGMP snooping, VLAN, Rapid Spanning Tree (RSTP), DHCP server, PTCP filter |
Local diagnostics | US Supply voltage Green LED
Link status Green LED
Telegrams received Yellow LED | Maximum power dissipation for nominal condition | 6 W |
Transmission medium | Copper
FO | Supply voltage (DC) | 24 V DC (redundant) |
Supply voltage range | 18.5 V DC ... 30.5 V DC | Power supply connection | Via COMBICON, max. conductor cross section 2.5 mm² |
Residual ripple | 3.6 V | Typical current consumption | 250 mA (at U |
Connection method | Screw connection | Conductor cross section, rigid | 0.2 mm² ... 2.5 mm² |
Conductor cross section, flexible | 0.2 mm² ... 2.5 mm² | Conductor cross section AWG | 24 ... 12 |
Stripping length | 7 mm | Degree of protection | IP20 |
Ambient temperature (operation) | -40 °C ... 70 °C | Ambient temperature (storage/transport) | -40 °C ... 85 °C |
Permissible humidity (operation) | 30 % ... 95 % (non-condensing) | Permissible humidity (storage/transport) | 30 % ... 95 % (non-condensing) |
Vibration (operation) | in acc. with IEC 60068-2-6: 5g, 150 Hz | Air pressure (operation) | 80 kPa ... 108 kPa (2000 m above mean sea level) |
Air pressure (storage/transport) | 70 kPa ... 108 kPa (3000 m above sea level) | Electromagnetic compatibility | Conformance with EMC Directive 2014/30/EU |
Conformance with EMC directives | IEC 61000-6-2 IEC 61000-4-2 (ESD) Criterion B
IEC 61000-4-3 (immunity to radiated interference) Criterion A
IEC 61000-4-4 (burst) Criterion B
IEC 61000-4-5 (surge) Criterion B
IEC 61000-4-6 (immunity to conducted interference) Criterion A | Noise immunity | EN 61000-6-2:2005 |
Noise emission | EN 61000-6-3/-4 | Basic functions | Store-and-forward switch complies with IEEE 802.3, 2 priority classes according to IEEE 802.1p, TCP/IP protocol, BootP-compatible, port mirroring, integrated web server function, multicast filtering, IGMP snooping, VLAN, Rapid Spanning Tree (RSTP), DHCP server, PTCP filter |
Supported browsers | Internet Explorer 5.5 or higher | Status display | LEDs: US1, US2 (power supply), Fail (alarm contact), 2 LEDs per Ethernet port (Link/Activity and Speed) |
Specifications may be subject to change without notice