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Hirschmann BRS20-4TX/2FX 942170-003 BOBCAT Managed Industrial Ethernet Switch
Managed industrial Fast Ethernet switch: 4 × 10/100Base-TX RJ45 and 2 × 100Base-FX multimode SC. Fanless DIN-rail design with TSN, redundant power inputs, industrial protocols, and secure managed networking.
Managed Copper Connectivity with Two Multimode Fiber Ports
The Hirschmann BRS20-4TX/2FX (part number 942170-003) is a managed industrial Fast Ethernet switch with 6 ports. It belongs to the BOBCAT series, and its time-sensitive networking capabilities support deterministic, real-time communication. The managed feature set also gives administrators control over traffic, redundancy, security, and diagnostics.
The four RJ45 ports can serve devices inside a control panel, while the two fixed SC multimode ports extend the network to another machine area without relying on copper over the full route. This layout is useful when electrical noise or distance makes a fiber backbone the more dependable choice, yet only a small number of local Ethernet devices need direct connections.
🔌 Port Configuration
4 × 10/100Base-TX RJ45
2 × 100Base-FX multimode SC
⏱️ TSN-Ready Platform
Supports time-sensitive industrial Ethernet traffic and precise network timing
⚡ Redundant DC Power
Two 12–24 V DC inputs; typical power consumption is 7 W
🛠️ Fanless DIN-Rail Design
No cooling fan to maintain; compact IP30 construction
Key Features & Benefits
- Managed Industrial Ethernet: VLAN, QoS, flow control, traffic shaping, jumbo frames, and multicast management help organize mixed automation traffic
- Resilient Network Options: HIPER-Ring, MRP, RSTP, link aggregation with LACP, link backup, and redundant network coupling support recovery planning
- Secure Access: IEC 62443-4-2-certified capabilities include 802.1X, RADIUS, access control lists, configurable password policies, audit trails, and HTTPS certificate management
- Multiple Management Paths: HTML5 management, CLI, SNMP v1/v2/v3, SSHv2, HTTPS, LLDP, TFTP, SFTP, SCP, and OPC UA provide flexible administration
- Industrial Protocol Profiles: Supports EtherNet/IP, IEC 61850, Modbus TCP, and PROFINET integration
- Precise Time Synchronization: PTPv2 transparent and boundary clock functions, IEEE 802.1AS, and SNTP support coordinated industrial communications
- Built-In Diagnostics: LEDs, signal contact, syslog, RMON, port mirroring, cable testing, link monitoring, and configuration checks improve troubleshooting visibility
- Local Service Interface: USB-C supports local management and device replacement workflows
- Panel-Friendly Power: Dual 12–24 V DC inputs and a plug-in signaling contact simplify industrial control-panel integration
- Manufacturer Guarantee: 5-year manufacturer's guarantee
⚠️ Match the Multimode Fiber and Optical Budget
The fixed SC ports are designed for multimode fiber. The listed reach is up to 5,000 m on 50/125 µm fiber or 4,000 m on 62.5/125 µm fiber under the stated link-budget assumptions. Confirm fiber type, connector condition, total loss, and reserve before installation.
🔐 Managed Security and Configuration
The BOBCAT management platform supports role-based administration, secure remote access, VLAN-based access restrictions, local and RADIUS authentication, configuration rollback, and backup to a remote server. Plan these settings before commissioning so the switch enters service with only the management paths and network access the application requires.
Technical Specifications
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Model
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BRS20-4TX/2FX
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Part Number
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942170-003
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Series
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Hirschmann BOBCAT BRS20
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Switch Type
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Managed industrial Fast Ethernet switch
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Total Network Ports
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6
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Copper Interfaces
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4 × 10/100Base-TX RJ45
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Fiber / SFP Interfaces
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2 × 100Base-FX multimode SC
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Fiber Distance
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Up to 5,000 m with 50/125 µm fiber or 4,000 m with 62.5/125 µm fiber
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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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7 W
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Heat Dissipation
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24 BTU (IT)/h
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Power / Signal 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
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USB-C
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Copper Segment Length
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0-100 m
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Supported Topology
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any
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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
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1% to 95%
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MTBF at 25°C
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2638177 hours
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Dimensions (W × H × D)
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57 mm x 137.5 mm x 103.5 mm (2.24" x 5.41" x 4.07")
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Weight
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420 g
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Mounting
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DIN Rail
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Protection Class
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IP30
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Housing
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PC-ABS
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Approvals / Standards
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cUL 61010; CE, FCC, EN61131, EN62368-1
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Guarantee
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5-year manufacturer's guarantee
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Verify power, wiring, fiber, firmware, and environmental requirements against the BOBCAT manual before commissioning. Optical reach depends on the complete link budget and, for SFP models, the selected transceivers.
📋 Installation Overview
Before Commissioning:
1. Confirm the Environment: Check enclosure protection, clearances, and the 0 C to +60 C (32 F to 140 F) operating range
2. Mount the Switch: Secure the unit to a grounded DIN rail inside the control enclosure
3. Wire Power: Connect the 12–24 V DC supply inputs and signaling contact according to the manual
4. Connect Network Media: Use compatible multimode fiber with SC connectors
5. Apply a Base Configuration: Set management access, VLANs, redundancy, time synchronization, and industrial protocol profiles
6. Harden Access: Replace default credentials, limit management interfaces, and configure authentication and logging
7. Test the Network: Verify every link, alarm contact, redundant path, and required recovery behavior before production use
Installation and electrical work should be performed by qualified personnel in accordance with the BOBCAT manual and applicable codes.
📦 What's Included
Included with the Device:
• Hirschmann BRS20-4TX/2FX switch (942170-003)
• Terminal block for supply voltage and signal contact
• Safety and general information sheet
Compatibility & Application Reference
Hirschmann BOBCAT Managed Switch Comparison
📄 Documentation & Support Resources
Hirschmann BRS BOBCAT Series Manual:
Managed Ethernet Switch Comparison: Compare Hirschmann managed industrial Ethernet switches
Local Management: USB-C supports local setup and device-replacement workflows; configuration can also be managed through the BOBCAT software interfaces
Part Number Note: Order Hirschmann BRS20-4TX/2FX using part number 942170-003 (vendor part number 942170003). Confirm the required port media, operating range, and accessories before purchase.
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