Plan fixed single-mode optical links around Hirschmann BRS20-0600S2S2-STCY99HHSESXX.X.XX

Hirschmann BRS20-0600S2S2-STCY99HHSESXX.X.XX is the Hirschmann BOBCAT BRS20-4TX/2FX-SM managed DIN rail switch, combining four 10/100BASE-TX RJ45 ports with two fixed single-mode SC fiber interfaces. This six-port configuration serves installations that need local copper connections and optical network paths. Its specified operating temperature is 0 to +60 °C. Use the complete Product code and part number 942170005 together when matching the unit to a project or an installed device.

Select by optical compatibility, not connector shape alone

The SM configuration identifies single-mode SC optical interfaces. It should be evaluated against the installed single-mode cable and the optical requirements of the far-end device. An SC connector can appear on equipment with different optical characteristics, so matching the connector is only one selection step. Review the path and its optical budget using the applicable manufacturer data. Avoid assigning a universal transmission distance from the SM suffix; the full link design determines the suitability of the selected connection. Document both fiber destinations and distinguish them from the four RJ45 connections in the port schedule. This is useful when the switch joins a local equipment group to another cabinet or network segment. If a fiber path is used for redundancy, record the selected protocol and how the participating devices are configured. If it is a spare path, label that status. Keeping the optical and logical records together makes later changes easier to evaluate without confusing the single-mode model with the multimode version.

Cabinet space and the DC supply

The catalog specifies a PC-ABS housing, IP30 protection and DIN rail mounting. The listed enclosure dimensions are 57 mm × 138 mm × 115 mm, with a device weight of 420 g. Allow additional room for connectors, cable routing and service access when preparing the panel drawing; the enclosure dimensions describe the device itself. The power specification is 2 × 12–24 V DC, and listed consumption is 7 W. Check the terminal arrangement and manufacturer installation instructions when designing the supply. Where two supply inputs are used, document the source arrangement and verify it against the required maintenance behavior. Include the switch in the cabinet power budget and retain accessible labeling for its connections.

Hirschmann product reference image. The pictured model may differ from the specified configuration.

Documented controls and diagnostic access

The switch supports HTTPS and SSHv2 management, SNMP v1/v2/v3 and LLDP. Diagnostics include link monitoring, copper cable testing, Syslog and port mirroring. These can support a service process in which an affected port is checked against its normal state before broader configuration changes are attempted. HIPER-Ring, MRP and RSTP appear in the redundancy functions. Choose the required method as part of the complete topology and verify its operation with the participating network devices. Keep the result and the approved settings in the commissioning record.

Technical specifications

Match port roles to the application

The RJ45 interfaces support Fast Ethernet, and the optical interfaces in this configuration are also specified at 100 Mbit/s. Evaluate the traffic carried by each connection, especially where several attached devices communicate through one fiber path. Count endpoint ports and network interconnections separately so the same interface is not allocated twice. VLANs, traffic prioritization and multicast handling should follow the actual application design. A successful basic link test does not establish that every required application exchange has been checked. Record the destinations and intended roles of the six interfaces, then verify normal operation with the connected equipment before accepting the installation.

Ordering and acceptance record

Request Hirschmann BRS20-0600S2S2-STCY99HHSESXX.X.XX, part number 942170005, and state the required quantity. Include the project reference, the intended optical connection and any separately required accessories in the inquiry. For replacement work, provide the existing equipment label and the required software functions. Ask for the offered configuration to be identified explicitly so purchasing can compare the scope against the original requirement. At commissioning, check the physical label, actual port destinations and authorized management access. Retain the accepted network settings with the equipment schedule and update the record after approved changes. This makes later maintenance and repeat purchasing easier to review.

Configuration files belong with the machine documentation

The documented configuration tools include USB-C management support, XML-based configuration files and automatic configuration undo. Remote configuration backup when saving is also listed. Select the backup method used by the site and test the procedure during commissioning. Store the accepted file with the machine reference and the full switch code, and record later authorized changes. A file without a clear device association can be as difficult to use as a missing backup. Identify service accessories separately if the maintenance procedure depends on a particular cable or adapter. Keep a dated record of accepted configuration changes.

Manufacturer reference:

Hirschmann BRS20-4TX/2FX-SM — official configuration details