1783-US8T — Stratix 2000 Unmanaged 8-Port Industrial Ethernet Switch

The 1783-US8T is an 8-port unmanaged Ethernet switch from the Stratix 2000 family, built for industrial panel and machine-level network installations. All eight ports operate at 10/100 Mbps with auto-negotiate and auto-MDIX — plug in any device with a standard RJ-45 Ethernet cable and it works, without configuring anything. No web interface, no VLAN setup, no spanning tree configuration. Just a switch.

For machine-level networks where every node is a known device — a controller, a drive, an HMI, a POINT I/O adapter — an unmanaged switch is often exactly the right tool. There's nothing to misconfigure, nothing that needs a network engineer to commission, and nothing that can accidentally block traffic due to a wrong VLAN setting. The Stratix 2000 adds industrial-grade build quality (DIN rail mount, wide temperature rating, 24V DC power input, conformal coat option) to that simplicity.

Specifications

Parameter	Value
Part Number	1783-US8T
Series	Stratix 2000
Ports	8 × RJ-45, 10/100 Mbps
Port Negotiation	Auto-negotiate, auto-MDIX
Switching Mode	Store-and-forward
MAC Address Table	2000 entries
Switching Latency	~3 µs (100 Mbps)
Power Input	24V DC (18–32V DC)
Power Consumption	4.3 W typical
Mounting	35 mm DIN rail
Enclosure	IP20
Operating Temperature	−10°C to 60°C
Humidity	5–95% non-condensing
Standards	UL 508, CE, ATEX Zone 2

Industrial Switch vs. Office Switch — What Actually Differs

On paper, an 8-port office switch and the 1783-US8T both move Ethernet packets between devices. The differences show up in the installation environment, not the protocol.

Office switches run on 100–240V AC from a wall outlet, mount in a rack or sit on a desk, and are rated for 0–40°C in a clean, temperature-controlled room. The 1783-US8T runs on 24V DC (the same supply already present in most machine panels), mounts on a DIN rail, operates from −10°C to 60°C, and tolerates the vibration and EMI that come with being in the same enclosure as contactors and drives. Conformal coating on the PCB protects against condensation and contamination in environments where humidity cycles.

For a panel that's already powered from a 24V DC supply, adding the 1783-US8T doesn't require a separate AC outlet or a power supply — it taps directly off the panel's 24V rail. That's a practical advantage in remote machine enclosures where running a new power circuit would be inconvenient.

Network Design Considerations

An unmanaged switch creates a shared collision domain per port — each device gets a dedicated connection to the switch, and the switch forwards frames only to the destination port based on its MAC address table. For typical machine-level I/O and HMI traffic, this is sufficient and adds no measurable latency to EtherNet/IP communication.

Where an unmanaged switch becomes the wrong choice: networks that need traffic prioritization for time-sensitive motion control (CIP Motion), networks requiring VLAN segmentation for security between zones, and networks needing port mirroring for traffic monitoring. Those applications need a managed switch like the Stratix 5700 or 5400. For standard I/O scanning, drive control, and HMI communication — the 1783-US8T covers it cleanly.

The 1783-US8T does not support Device Level Ring (DLR) topology. DLR requires a managed switch with ring supervisor capability. For DLR-based EtherNet/IP networks, use a DLR-capable managed switch or devices with dual-port EtherNet/IP connectivity that can participate in the ring directly.

FAQ

Q: Can a laptop connect to the 1783-US8T for programming a controller on the same network?

Yes. Connect the laptop to any available port. The switch bridges all ports transparently — the laptop has full access to all devices on the switch without any configuration.

Q: How many devices can the switch handle before performance degrades?

With 8 ports, the theoretical maximum is 8 devices. Performance degradation from MAC table overflow isn't a concern at this scale — the 2000-entry table comfortably handles 8 devices. The more relevant constraint is total bandwidth; if all 8 devices are simultaneously generating high-bandwidth traffic, contention for switch bandwidth can increase latency. For normal I/O and HMI traffic this is not an issue.

Q: Is the switch hot-swap capable — can a device be connected or disconnected without affecting others?

Yes. Plugging or unplugging a device from one port doesn't interrupt traffic on other ports. The switch handles the link event on the affected port transparently.

Q: Does the switch need to be commissioned in Studio 5000?

No. Unmanaged switches are invisible to the controller and require no configuration in any software. They appear as network infrastructure, not as addressable devices.

Q: What's the maximum cable length per port?

100 m per segment, the standard IEEE 802.3 limit for 100BASE-TX on Cat5e or better cable. This applies to each individual cable run between the switch port and the connected device.

1783-US8T New PLC 8 Port Stratix2000 Ethernet Switch 1783US8T