1783-US5T — Stratix 2000 Unmanaged 5-Port Industrial Ethernet Switch

The 1783-US5T is a 5-port unmanaged industrial Ethernet switch from the Stratix 2000 family. All five ports run at 10/100 Mbps with auto-negotiate and auto-MDIX. It mounts on a 35 mm DIN rail, runs on 24V DC, and requires no configuration — connect devices, apply power, and traffic flows. The operating temperature range of −10°C to 60°C and the conformal-coated PCB option make it suitable for machine panel environments that would challenge consumer-grade networking hardware.

The 1783-US5T is the smaller sibling of the 8-port 1783-US8T. Five ports is the right count for a machine node with a controller, an HMI, a drive or two, and an upstream network connection — a very common configuration in compact machine panels where one switch handles the entire local network without leaving unused ports. The smaller physical footprint also matters in tight panels where every millimetre of DIN rail is accounted for.

Specifications

Parameter	Value
Part Number	1783-US5T
Series	Stratix 2000
Ports	5 × RJ-45, 10/100 Mbps
Port Negotiation	Auto-negotiate, auto-MDIX
Switching Mode	Store-and-forward
Switching Latency	~3 µs (100 Mbps)
MAC Address Table	2000 entries
Power Input	24V DC (18–32V DC)
Power Consumption	3.5 W typical
Mounting	35 mm DIN rail
Enclosure	IP20
Operating Temperature	−10°C to 60°C
Standards	UL 508, CE, ATEX Zone 2, cUL

Five Ports — When It's the Right Count

Port count is a practical design decision. An 8-port switch in a panel with five devices leaves three unused ports — not a problem, but wasted panel cost and DIN rail space. A 5-port switch in the same panel fits the load exactly. When designing a new machine or panel, counting the local Ethernet devices first — controller, HMI, drives, remote I/O adapters, upstream connection — then selecting the switch to match avoids both over-specifying (unused ports) and under-specifying (needing a second switch).

A typical 5-device node on a compact machine: one CompactLogix controller, one PanelView HMI, one drive with embedded EtherNet/IP, one FLEX I/O or POINT I/O adapter, and one connection to the upstream plant network or a second switch. All five ports occupied, nothing wasted. The 1783-US5T is built exactly for this topology.

If the device count is likely to grow — a second drive added later, an additional I/O node, a barcode scanner — the 8-port 1783-US8T is worth considering at the outset. Adding a second switch later to expand port count is workable but adds a hop and an extra device to manage. Plan for the final state, not just the initial commissioning count.

FAQ

Q: Can a laptop be connected to the 1783-US5T for PLC programming while the controller is online?

Yes. Connect the laptop to any available port; the switch bridges all five ports transparently. The laptop has full access to all devices on the switch without any configuration change. Use a static IP address on the laptop in the same subnet as the controller.

Q: What happens to traffic on other ports if one device connected to the switch has a problem?

The switch isolates each port independently. A device generating malformed frames, or a cable with intermittent connections on one port, doesn't affect traffic on the other four ports. Each port operates independently at the physical layer.

Q: Does the switch need to be grounded separately from the DIN rail?

The switch chassis ground connects through the DIN rail mounting. Ensure the DIN rail itself is properly bonded to the panel earth. A floating DIN rail means the switch has no ground connection, which affects EMC performance and safety.

Q: Can the 1783-US5T and 1783-US8T be mixed on the same network?

Yes. Both are standard Ethernet switches and interoperate with each other and with any other 10/100 Ethernet device. Mix them freely based on the port count needed at each node location.

Q: Is the switch visible to the controller in Studio 5000's I/O configuration?

No. Unmanaged switches have no IP address and are invisible to the controller and to Studio 5000. They appear to the network as transparent forwarding devices — effectively invisible infrastructure. Managed switches are the ones that appear as configurable network devices.

1783-US5T New 1783US5T Ser A Stratix 2000 Ethernet Switch