Product Hierarchy
Product Hierarchy

LRS42-7TX/3SFP/1C - 7x FE/GE TX, 3x FE/GE SFP, 1x FE/GE Combo, 46-57 V DC, -40-+60°C, Lite Managed, PoE/PoE+ max. 180W

Lite Managed Rail-Mount Industrial Ethernet/Fast-Ethernet Switch with 7 x 10/100/1000BASE-TX, 3x 100/1000BASE-FX SFP, 1x Combo (10/100/1000BASE-TX and 100/1000BASE-FX SFP), PoE/PoE+ on up to 8 ports power budget max. 180W, Store and Forward Switching Mode, HiEOS Layer 2 Software

Product description

Part Number: 942328004
Port type and quantity: 7x FE/GE TX, 3x FE/GE SFP, 1x FE/GE Combo, PoE on up to 8 ports

More Interfaces

Power supply/signaling contact: 1 x plug-in terminal block, 6-pin

Network size - length of cable

Twisted pair (TP): 0 - 100 m

Power requirements

Operating Voltage: 48 VDC (PoE) / 54 VDC (PoE+)
Power consumption: 196.3W
Power output in BTU (IT)/h: 56 BTU/h


Switching: Static Unicast/Multicast Address Entries, VLAN (802.1Q), Independent VLAN Learning, QoS/Port Prioritization (802.1D/p), TOS/DSCP Prioritization, CoS Queue Management, Queue-Shaping/Max. Queue Bandwidth, Jumbo Frames, IGMP Snooping/Querier (v1/v2/v3), Unknown Multicast Filtering, IGMP Group Filtering per Port, Flow Control (802.3X), Egress Interface Shaping, Ingress Storm Protection
Redundancy: MRP Client, RSTP 802.1D-2004 (IEC62439-1), ERPS (G.8032), ERPS v2 (G.8032)
Management: LLDP (802.1AB), LLDP-MED, Password change on first login, SSHv2, HTTP, HTTPS, Responsive GUI, SNMP v1/v2/v3, Traps, Telnet, TFTP, Dual Software Image Support
Diagnostics: Management Address Conflict Detection, LEDs, Device Status Indication, Syslog, Link Speed and Duplex Monitoring, RMON (1, 2, 3, 9), Port Mirroring 1:1, Port Mirroring N:1, System Information, SFP Management
Configuration: Web-based Management, HiDiscovery, Command Line Interface (CLI), Full-featured MIB Support
Security: MAC Address Limit Per Port, Restricted Management Access, Appropriate Use Banner, Multiple Privilege Levels, Local User Management
Time synchronisation: NTP Client

Ambient conditions

MTBF (Telecordia SR-332 Issue 3) @ 25°C: 3 177 412 h
Air Pressure (Operation): min 795 hPa
Operating temperature: -40-+60 °C
Storage/transport temperature: -40-+85 °C
Relative humidity (non-condensing): 5-95 %

Mechanical construction

Dimensions (WxHxD): 68x135x118 mm
Weight: 720 g
Mounting: DIN Rail
Protection class: IP30

EMC interference immunity

EN 61000-4-2 electrostatic discharge (ESD): 4 kV contact discharge, 8 kV air discharge
EN 61000-4-3 electromagnetic field: 10 V/m (80 MHz - 1 GHz), 3 V/m (1,4 GHz – 6GHz)
EN 61000-4-4 fast transients (burst): 2 kV power line, 2 kV data line
EN 61000-4-5 surge voltage: power line: 2 kV (line/earth), 1 kV (line/line), 1 kV data line
EN 61000-4-6 Conducted Immunity: 10 V (150 kHz-80 MHz)

EMC emitted immunity

EN 55032: EN 55032 Class A
FCC CFR47 Part 15: FCC 47CFR Part 15, Class A


Basis Standard: CE,  FCC, EN61131
Safety of industrial control equipment: cUL 61010-1


Guarantee: 60 months (please refer to the terms of guarantee for detailed information)

Scope of delivery and accessories

Accessories to Order Separately: SFP Transceivers, Rail Power Supply, Mounting Accessories
Scope of delivery: Device, Terminal Block, Start-up Instructions, Saftey Instructions

Further Instructions

Product Documentation:


Update and Revision: Revision Number: 0.40 Revision Date: 07-09-2024
Item #Type
User Manual Installation Industrial Ethernet Lemur Rail Switch LRS Family (English)
Description: The “Installation” user manual contains a device description, safety instructions, and other information that you need to install the device before you begin with the configuration of the device.
Version: 02
Manual Collection - LRS HiEOS - English
Description: The manual collection contains the manuals for the software release in one document and therefore enables you to search for keywords over the manuals at once.
Version: 1.1
Description: Software for all Lemur Switches - MIB files are included in the Zip file
Version: 01.1.00
No accessories are available for this product