Connect copper devices and optical links in demanding temperatures with Hirschmann BRS20-2000ZZZZ-TTDY99HHSESXX.X.XX
Hirschmann BRS20-2000ZZZZ-TTDY99HHSESXX.X.XX identifies the BOBCAT BRS20-16TX/4SFP-EEC configuration: sixteen 10/100BASE-TX copper ports and four 100 Mbit/s SFP slots in a metal housing. This combination provides separate connections for local Ethernet devices and optical links between network locations. The specified operating range is −40 to +70 °C, making temperature conditions an important part of the selection. The four SFP slots are arranged as two uplink groups; compatible optical modules must be selected for the actual fiber paths.
Four fiber slots, four clearly documented destinations
Begin the optical schedule with the destination of each uplink. Record the far-end equipment, fiber type and proposed transceiver at both ends, then check compatibility and the optical budget. A slot count does not establish a transmission distance, and these are 100 Mbit/s interfaces rather than Gigabit uplinks. If two paths support a redundant topology, identify their routes separately in the drawing. Clear labeling helps commissioning personnel connect the intended paths and gives maintenance staff a useful starting point when tracing an interrupted connection.

Hirschmann product reference image. The pictured model may differ from the specified configuration.
Technical specifications
| Brand | Hirschmann |
|---|---|
| Catalog Type | BRS20-16TX/4SFP-EEC |
| Product code | BRS20-2000ZZZZ-TTDY99HHSESXX.X.XX |
| Part Number | 942170056 |
| Port Type and Quantity | 20 Ports in total: 16x 10/100BASE TX / RJ45; 4x 100Mbit/s fiber ; 1. Uplink: 2 x SFP Slot (100 Mbit/s) ; 2. Uplink: 2 x SFP Slot (100 Mbit/s) |
| Operating Voltage | 2 x 12 VDC ... 24 VDC |
| Power Consumption | 15 W |
| Operating temperature | −40 to +70 °C |
| Housing | Metal |
| Dimensions (WxHxD) | 123 mm x 140 mm x 115 mm |
| Mount Type | DIN Rail |
| IP Protection Rating | IP30 |
Environmental capability needs a complete installation plan
The metal enclosure and extended temperature range describe the switch configuration, while the IP30 rating sets a different boundary for installation. Consider the conditions inside the finished cabinet, including local heating, cold starts and exposure at cable entries. A wide operating range does not make an unprotected outdoor installation appropriate. Allocate the documented 15 W consumption in the panel power budget and verify the DC supply before energizing the equipment. For mechanical planning, confirm the current dimensional drawing and weight for the offered configuration.
Management tools for a mixed-media installation
HTTPS, SSHv2 and SNMP v1/v2/v3 are included in the management functions. The diagnostic list includes SFP management, copper cable testing, link-speed and duplex monitoring, Syslog and port mirroring. These functions provide different views of the network: link information helps identify an interface condition, while mirrored traffic supports a more detailed investigation. Define management access and logging destinations before commissioning so the information is available when needed. The redundancy list includes HIPER-Ring, MRP and RSTP; select and validate the method used by the actual installation.
Make the copper and optical networks manageable
The managed feature set includes VLANs, prioritization and multicast controls, along with network redundancy options. Assign each of the sixteen copper ports a documented role and identify which traffic crosses the optical connections. Capacity planning should account for shared-link traffic rather than relying on the total number of available ports. A planned addressing scheme and a saved configuration also make it easier to associate diagnostic information with the correct cabinet, machine or network segment. Test the selected redundancy arrangement during acceptance.
Supply scope for an EEC fiber configuration
Use Hirschmann BRS20-2000ZZZZ-TTDY99HHSESXX.X.XX and part number 942170056 together in the purchase inquiry. List SFP quantities and module references separately, and specify any accessories required by the installation team. This avoids assuming that optical modules or service cables are included with the switch. For a replacement, provide the existing label and configuration record so that the offered hardware and software can be compared with the installed device. Retain the final module list with the switch documentation for future maintenance.
Before accepting the optical links
Compare every fitted module with the approved module schedule. Check copper link speed and duplex indications, confirm each optical destination and preserve the final configuration after testing. Record which ports are spare and which are part of the selected redundancy arrangement. Store this information with Hirschmann BRS20-2000ZZZZ-TTDY99HHSESXX.X.XX so a future service visit can distinguish a changed module, an altered cable path and a configuration change without having to rebuild the network documentation.
Local access when the network path is unavailable
USB-C is listed for local management and device replacement. The configuration functions include an XML-based configuration file, automatic configuration undo and remote configuration backup when saving. Plan how those options will be used before a service incident occurs, including where approved files are stored and how a technician identifies the correct one. Record any service cable or adapter required by the chosen procedure as a separate accessory. This gives the optical installation an additional maintenance path without assuming that every tool needed for local access is included in the switch package. Keep a dated record of accepted configuration changes.
Manufacturer reference:
Hirschmann BRS20-16TX/4SFP-EEC — official configuration details
