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Hirschmann BRS20-12TX BOBCAT Managed Industrial Ethernet Switch: 12 Ports
DIN-rail managed industrial fast ethernet switch with 12 × 10/100Base-TX RJ45, fanless operation, Time-Sensitive Networking support, redundant 12-24V DC power inputs, and a 5-year manufacturer's guarantee.
Managed Connectivity for Real-Time Industrial Networks
The Hirschmann BRS20-12TX (part number 942170-073) is a 12-port BOBCAT managed industrial Ethernet switch designed for DIN-rail automation networks. Its fanless pc-abs housing combines 12 × 10/100Base-TX RJ45 in a compact platform for connecting PLCs, controllers, HMIs, drives, remote I/O, and other Ethernet-enabled equipment.
BOBCAT switching features support deterministic communication, resilient network design, and controlled traffic flow. Time-Sensitive Networking, VLANs, Quality of Service, HIPER-Ring, MRP, RSTP, industrial protocol profiles, and extensive diagnostic tools help engineers build and maintain reliable machine and plant networks. Its standard operating range supports installations from 0°C to +60°C (32°F to 140°F).
🔌 12 Managed Ports
12 × 10/100Base-TX RJ45 for industrial device and uplink connections
⏱️ TSN & Precision Timing
Time-Sensitive Networking, PTPv2, 802.1AS, and SNTP support synchronized real-time communication
🔁 Network Redundancy
HIPER-Ring, MRP, RSTP, link aggregation, link backup, and redundant network coupling
🌡️ Industrial Temperature
0 C to +60 C (32 F to 140 F) operating range with fanless cooling
Key Features & Benefits
- Application-Focused Port Layout: Copper-only Fast Ethernet access ports for the bandwidth and media needs of this BOBCAT configuration
- Deterministic Communication: TSN and precision time-synchronization functions support coordinated industrial processes and time-sensitive data
- Resilient Network Design: Multiple ring, spanning-tree, link-backup, and aggregation options help maintain communications after a link interruption
- Traffic Segmentation: VLAN, multicast, QoS, queue management, storm protection, and flow-control tools help separate and prioritize network traffic
- Industrial Protocol Support: Profiles include EtherNet/IP, IEC 61850, Modbus TCP, and PROFINET for integration across automation systems
- Layered Security: IEC 62443-4-2 certification, 802.1X access control, RADIUS, ACLs, HTTPS, password policies, and user-management functions help protect network access
- Service and Diagnostics: USB-C management, port monitoring, cable testing, event logging, RMON, port mirroring, and SFP management simplify troubleshooting
- Fanless Operation: Eliminates a common mechanical wear component and supports quiet, low-maintenance panel installation
⚠️ Copper Network Planning
Twisted-pair Ethernet runs support cable lengths from 0 to 100 meters. Confirm the required port speed, cable category, and network topology before installation. This model does not include fiber SFP ports.
⚡ Power & Installation Notes
Redundant power: The switch accepts two 12-24V DC power inputs through a plug-in terminal block.
Panel mounting: Install on a DIN rail inside an enclosure appropriate for the IP30 protection class and the surrounding environment.
Management and replacement: A USB-C interface supports local management and device-replacement workflows.
Quick Technical Specifications
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Part Number
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942170-073
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Vendor Part Number
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942170073
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Model
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BRS20-12TX
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Series
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Hirschmann BOBCAT
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Switch Type
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Managed Industrial Fast Ethernet Switch
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Total Ports
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12
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Port Configuration
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12 × 10/100Base-TX RJ45
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Housing
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PC-ABS
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Operating Voltage
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2 x 12 - 24V DC
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Power Consumption
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9 W
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Heat Dissipation
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31 BTU/h
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Operating Temperature
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0 C to +60 C (32 F to 140 F)
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Dimensions (W × H × D)
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73 mm x 137.5 mm x 103.5 mm (2.87" x 5.41" x 4.07")
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Mounting
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DIN Rail
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Weight
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600 g
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Protection Class
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IP30
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Warranty
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5-Year Manufacturer's Guarantee
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📋 Where This Switch Fits
Use the BRS20-12TX for managed Ethernet connections in machine-control panels, manufacturing cells, process systems, material-handling equipment, utilities, and infrastructure networks. Select this model when its 12 × 10/100Base-TX RJ45 layout matches the connected devices and uplink plan.
📦 Scope of Delivery
device, terminal block for supply voltage & signal contact, safety & general info sheet
Hirschmann BOBCAT Series Selection Reference
Choose the BOBCAT platform according to required copper speed, uplink media, port density, and temperature range.
Complete Technical Data
Review the following interface, networking, software, environmental, mechanical, EMC, and approval details before specifying the switch.
More Interfaces
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Power supply/signaling contact
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1 plug-in terminal block, 6-pin
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Digital Input
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1 plug-in terminal block, 2-pin
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Local Management & Device Replacement
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USB-C
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Network Size — Cable Length
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Twisted pair (TP)
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0-100 m
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Network Size — Cascadibility
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Line - / star topology
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any
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Power Requirements
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Operating voltage
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2 x 12 - 24V DC
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Power consumption
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9 W
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Power output in Btu (IT) h
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31
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Software
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Switching
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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)
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Redundancy
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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
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Management
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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
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Diagnostics
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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
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Configuration
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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
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Security
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ISASecure CSA / IEC 62443-4-2 certified, 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
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Industrial Profiles
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EtherNet/IP Protocol, IEC61850 Protocol (MMS Server, Switch Model), Modbus TCP, PROFINET Protocol
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Time synchronization
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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
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Miscelleaneous
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Digital IO Management, Manual Cable Crossing, Port Power Down
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Ambient Conditions
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Operating temperature
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0 C to +60 C (32 F to 140 F)
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Storage/transport temperature
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-40 C to +70 C (-40 F to 158 F)
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Relative humidity (non-condensing)
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1% to 95%
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Mechanical Construction
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Dimensions (W x H x D)
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73 mm x 137.5 mm x 103.5 mm (2.87" x 5.41" x 4.07")
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Mounting
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DIN Rail
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Weight
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600 g
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Protection class
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IP30
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Mechanical Stability
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IEC 60068-2-27 shock
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15 g, 11 ms duration
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IEC 60068-2-6 vibration
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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
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EMC Interference Immunity
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EN 61000-4-2 electrostatic discharge (ESD)
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6 kV contact discharge, 8 kV air discharge
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EN 61000-4-3 electromagnetic field
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10 V/m (80-2000 MHz); 5 V/m (2000-2700 MHz); 3 V/m (5100-6000 MHz)
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EN 61000-4-4 fast transients (burst)
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2 kV power line, 2 kV data line
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EN 61000-4-5 surge voltage
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power line: 2 kV (line/earth) and 1 kV (line/line); data line: 2 kV
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EN 61000-4-6 conducted immunity
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10 V (150 kHz-80 MHz)
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EMC Emissions
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FCC CFR47 Part 15
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FCC CFR47 Part 15 Class A
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EN 55022
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EN 55032 Class A
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Approvals
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Safety of industrial control equipment
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cUL 61010
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Basis Standard
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CE, FCC, EN61131, EN62368-1
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