Next generation switches to provide advanced security and real-time communication through time-sensitive networking (TSN) technology on all ports for standardized Ethernet usage in any application.

The switches support the new IEEE 802.3bz standard with 2.5 Gigabit speeds to bridge the gap between 1 Gigabit and 10 Gigabit speeds. Legacy devices or networks can be connected with 100 Mbit/s, 1 Gigabit uplinks for current networks or 2.5 Gigabit for future-proof networks. The BOBCAT switches support all speeds by replacing the SFP in the field.

The switches are also the first of its kind to enable real-time communication using time-sensitive networking (TSN). Industrial applications require this capability to maximize performance and security, even under the most demanding conditions.


  • Simultaneously support multiple services on one network through TSN technology
  • Limit downtime and ensure network protection through advanced security features
  • Prepare for future network growth with increased bandwidth and speed capabilities


  • Real-time TSN Ethernet support for precise data transmission
  • Advanced security features, including wire-speed access control lists (ACL) and automatic denial-of-service (DoS) prevention
  • Increased bandwidth capabilities, supporting tri-speed fiber SFP slots with 100MB/s, 1 Gigabit and 2.5 Gigabit speeds
  • Hardware-supported time synchronization in accordance with IEEE 1588v2 Precision Time Protocol
  • Interoperability with legacy systems for simplified migration
  • Additional interface options through digital input for more flexibility
  • Robust industrial design reinforces the switch’s resistance against harsh conditions
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Product description
Type BRS20-4TX (Product code: BRS20-04009999-STCY99HHSESXX.X.XX)
Description Managed Industrial Switch for DIN Rail, fanless design Fast Ethernet Type
Part Number 942170001
Port type and quantity 4 Ports in total: 4x 10/100BASE TX / RJ45
More Interfaces
Power supply/signaling contact 1 x plug-in terminal block, 6-pin
Digital Input 1 x plug-in terminal block, 2-pin
Local Management and Device Replacement USB-C
Network size – length of cable
Twisted pair (TP) 0 – 100 m
Network size – cascadibility
Line – / star topology any
Power requirements
Operating Voltage 2 x 12 VDC … 24 VDC
Power consumption 5 W
Power output in BTU (IT)/h 17
Switching Independent VLAN Learning, Fast Aging, Static Unicast/Multicast Address Entries, QoS / Port Prioritization (802.1D/p), TOS/DSCP Prioritization, Interface Trust Mode, CoS Queue Management, Queue-Shaping / Max. Queue Bandwidth, Flow Control (802.3X), Egress Interface Shaping, Ingress Storm Protection, Jumbo Frames, VLAN (802.1Q), GARP VLAN Registration Protocol (GVRP), Voice VLAN, GARP Multicast Registration Protocol (GMRP), IGMP Snooping/Querier per VLAN (v1/v2/v3), Unknown Multicast Filtering, Multiple VLAN Registration Protocol (MVRP), Multiple MAC Registration Protocol (MMRP), Multiple Registration Protocol (MRP)
Redundancy HIPER-Ring (Ring Switch), Link Aggregation with LACP, Link Backup, Media Redundancy Protocol (MRP) (IEC62439-2), Redundant Network Coupling, RSTP 802.1D-2004 (IEC62439-1), RSTP Guards
Management Dual Software Image Support, TFTP, SFTP, SCP, LLDP (802.1AB), LLDP-MED, SSHv2, HTTP, HTTPS, Traps, SNMP v1/v2/v3, Telnet, IPv6 Management , OPC UA Server
Diagnostics Management Address Conflict Detection, MAC Notification, Signal Contact, Device Status Indication, TCPDump, LEDs, Syslog, Persistent Logging on ACA, Port Monitoring with Auto-Disable, Link Flap Detection, Overload Detection, Duplex Mismatch Detection, Link Speed and Duplex Monitoring, RMON (1,2,3,9), Port Mirroring 1:1, Port Mirroring 8:1, Port Mirroring N:1, Port Mirroring N:2, System Information, Self-Tests on Cold Start, Copper Cable Test, SFP Management, Configuration Check Dialog, Switch Dump
Configuration Automatic Configuration Undo (roll-back), Configuration Fingerprint, Text-based Configuration File (XML), Backup config on a remote server when saving, Clear config but keep IP settings, BOOTP/DHCP Client with Auto-Configuration, DHCP Server: per Port, DHCP Server: Pools per VLAN, AutoConfiguration Adapter ACA21/22 (USB), HiDiscovery, USB-C Management support, Command Line Interface (CLI), CLI Scripting, CLI script handling over ENVM at boot, Full-featured MIB Support, Context-sensitive Help, HTML5 based Management
Security MAC-based Port Security, Port-based Access Control with 802.1X, Guest/unauthenticated VLAN, Integrated Authentication Server (IAS), RADIUS VLAN Assignment, Denial-of-Service Prevention, DoS Prevention Drop Counter, VLAN-based ACL, Ingress VLAN-based ACL, Basic ACL, Access to Management restricted by VLAN, Device Security Indication, Audit Trail, CLI Logging, HTTPS Certificate Management, Restricted Management Access, Appropriate Use Banner, Configurable Password Policy, Configurable Number of Login Attempts, SNMP Logging, Multiple Privilege Levels, Local User Management, Remote Authentication via RADIUS, User Account Locking, Password change on first login
Time synchronisation PTPv2 Transparent Clock two-step, PTPv2 Boundary Clock, BC with Up to 8 Sync / s , 802.1AS, Buffered Real Time Clock, SNTP Client, SNTP Server TSN 802.1Qbv Support
Industrial Profiles EtherNet/IP Protocol, IEC61850 Protocol (MMS Server, Switch Model), Modbus TCP, PROFINET Protocol
Miscellaneous Digital IO Management, Manual Cable Crossing, Port Power Down
Ambient conditions
MTBF (Telecordia SR-332 Issue 3) @ 25°C 5880430 h
Operating temperature 0-+60 °C
Storage/transport temperature -40-+70 °C
Relative humidity (non-condensing) 1- 95 %
Mechanical construction
Dimensions (WxHxD) 57 mm x 138 mm x 115 mm
Weight 380 g
Housing PC-ABS
Mounting DIN Rail
Protection class IP30
Mechanical stability
IEC 60068-2-6 vibration 5 Hz … 8,4 Hz with 3,5 mm amplitude; 2 Hz … 13,2 Hz with 1 mm amplitude; 8,4 Hz … 200 Hz with 1 g; 13,2 Hz … 100 Hz with 0,7 g
IEC 60068-2-27 shock 15 g, 11 ms duration
EMC interference immunity
EN 61000-4-2 electrostatic discharge (ESD) 6 kV contact discharge, 8 kV air discharge
EN 61000-4-3 electromagnetic field 10 V/m (80-2000 MHz); 5 V/m (2000-2700 MHz); 3 V/m (5100-6000 MHz)
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) and 1 kV (line/line); data line: 2 kV
EN 61000-4-6 Conducted Immunity 10 V (150 kHz-80 MHz)
EMC emitted immunity
EN 55022 EN 55032 Class A
FCC CFR47 Part 15 FCC 47CFR Part 15, Class A
Basis Standard CE, FCC, EN61131, EN62368-1
Safety of industrial control equipment cUL61010