Hirschmann BRS20-20009999-STCY99HHSESXX.X.XX: BRS20-20TX Deployment Guide for High-Port-Count RJ45 Control Networks
Hirschmann BRS20-20009999-STCY99HHSESXX.X.XX is the complete ordering code for BRS20-20TX, part number 942170081. This managed industrial switch provides twenty 10/100BASE-TX RJ45 ports in a fanless DIN rail design. It is an all-copper BOBCAT configuration, useful to evaluate when a control cabinet needs many local Fast Ethernet connections without specifying fiber uplink slots.

Reference photograph: shared Hirschmann stock image. The photographed unit may show a different model; this image does not establish the configuration or availability of Hirschmann BRS20-20009999-STCY99HHSESXX.X.XX.
Technical facts for the selected BRS20 model
| Brand / series | Hirschmann / BOBCAT |
| Type | BRS20-20TX |
| Product code | BRS20-20009999-STCY99HHSESXX.X.XX |
| Part number | 942170081 |
| Network connections | 20 × 10/100BASE-TX RJ45 |
| Mounting | DIN rail |
| Power supply | 2 × 12–24 V DC |
| Power consumption | 15 W |
| Operating temperature | 0 to +60 °C |
| Housing | PC-ABS |
| Protection class | IP30 |
| Dimensions (W × H × D) | 109 mm × 138 mm × 115 mm |
| Weight | 1060 g |
Allocate twenty ports across equipment and network links
Build a connection list before choosing a high-port-count switch. Controller links, operator interfaces, maintenance connections and links to neighboring switches all draw from the same twenty ports. The copper segment range is listed as 0–100 m. Where a required connection exceeds the feasible copper route, review the network design instead of treating the port count as the only selection factor.
Installation size and enclosure heat
The catalog lists dimensions of 109 × 138 × 115 mm, a weight of 1060 g and a PC-ABS housing with IP30 protection. Operating temperature is specified as 0 to +60 °C. Consumption is 15 W, with two 12–24 V DC supply inputs. Include the switch and nearby equipment in the cabinet's power and heat assessment, and retain access to the six-pin power/signaling block.
Prepare a manageable port map
Give each installed link a documented purpose and verify that the commissioning configuration agrees with the physical cabling. The listed two-pin digital input may also need to be included in the wiring record. Industrial profiles include EtherNet/IP, PROFINET, Modbus TCP and IEC 61850 MMS server / switch-model functions; the network engineer should confirm the actual firmware and required functions for the installation.
Send an accurate product inquiry
HKXY quotation requests should identify BRS20-20TX, part number 942170081 and the full product code. Provide quantity, power-supply details and the required delivery destination. For a replacement, include the existing label and software requirements; for a new panel, include the port schedule and available cabinet space.
Technical source: Belden catalog for Hirschmann BRS20-20TX.