Hirschmann BRS20-08009999-STCY99HHSESXX.X.XX: Planning an Eight-Port Copper Network with the BRS20-8TX BOBCAT Managed DIN Rail Switch
For a copper-only machine network, Hirschmann BRS20-08009999-STCY99HHSESXX.X.XX is the ordering reference for Hirschmann BRS20-8TX, part 942170002. Its eight RJ45 interfaces run at 10/100BASE-TX and the device mounts on DIN rail without a fan. This configuration is intended for Fast Ethernet planning; an eight-port physical layout does not imply Gigabit capability or powered Ethernet outputs.

Reference photograph: shared Hirschmann product image. The photographed unit may be a different model; this image does not establish the configuration or availability of Hirschmann BRS20-08009999-STCY99HHSESXX.X.XX.
Count every connection, including the upstream link
Build the connection list from the actual cabinet equipment: controller, operator panel, drive interface, remote station and the link to another switch. Each attached cable uses one of the eight ports. Keeping spare connections in the schedule can avoid selecting an already fully occupied switch when the machine is commissioned or later modified.
BRS20-8TX technical reference
| Brand / series | Hirschmann / BOBCAT |
| Type | BRS20-8TX |
| Product code | BRS20-08009999-STCY99HHSESXX.X.XX |
| Part number | 942170002 |
| Ports | 8 × 10/100BASE-TX RJ45 |
| Operating temperature | 0 to +60 °C |
| Supply inputs | 2 × 12–24 V DC |
| Power consumption | 6 W |
| Mounting | DIN Rail |
| Dimensions (W × H × D) | 73 mm × 138 mm × 115 mm |
| Housing / protection | PC-ABS / IP30 |
| Weight | 420 g |
Power and space are separate checks
The catalog lists two 12–24 V DC supply inputs and 6 W consumption. The 73 × 138 × 115 mm PC-ABS enclosure also needs space for connectors, cable bending and service access. Check the cabinet layout against the installation instructions instead of treating the bare device dimensions as its complete installed footprint.
What must match on an existing network?
Confirm the management settings, firmware requirements and port assignments with the maintenance team. The catalog names EtherNet/IP, PROFINET, Modbus TCP and IEC 61850 MMS server / switch-model profiles, but commissioning still depends on the required configuration. The specified copper-segment reference is 0–100 m; cable condition and termination remain part of the link assessment.
Confirm the supply scope with HKXY
Send HKXY the complete BRS20-08009999-STCY99HHSESXX.X.XX reference, quantity and requested delivery location. For a replacement, include a clear label photograph and the existing configuration requirements. The quotation should confirm 942170002, the supplied configuration and the delivery terms.
Technical reference: Belden catalog for Hirschmann BRS20-8TX.