1783-LMS8 New Sealed 1783LMS8 /A Stratix 2500 8-Port Ethernet Switch
PRODUCT DETAILS
1783-LMS8 — Stratix 2000 Managed 8-Port Industrial Ethernet Switch
The 1783-LMS8 is an 8-port managed industrial Ethernet switch from the Stratix 2000 series, combining DIN rail mounting, 24V DC power input, and a managed switch feature set designed for EtherNet/IP machine networks. Unlike the unmanaged 1783-US8T, this switch is configurable — VLANs, QoS traffic prioritization, IGMP snooping for multicast management, port mirroring, and SNMP-based network diagnostics are all available through the web-based management interface.
For most small machines with a handful of devices on one flat network, a managed switch adds unnecessary complexity. For machines with more demanding network requirements — motion control where CIP Motion traffic needs priority, multi-zone systems where VLAN segmentation improves security, or any installation where network diagnostics and traffic visibility matter — the managed feature set pays for the additional setup effort.
Specifications
| Parameter | Value |
|---|---|
| Part Number | 1783-LMS8 |
| Series | Stratix 2000 |
| Ports | 8 × RJ-45, 10/100 Mbps |
| Management | Web browser, CLI, SNMP v1/v2c/v3 |
| VLANs | Yes (802.1Q, up to 256 VLANs) |
| QoS | Yes (802.1p priority queuing) |
| IGMP Snooping | Yes (v1, v2) |
| Port Mirroring | Yes (1 monitor port) |
| DLR Support | Yes (ring supervisor capable) |
| Spanning Tree | STP, RSTP (802.1w) |
| Power Input | 24V DC (18–32V DC) |
| Power Consumption | 6W typical |
| Mounting | 35 mm DIN rail |
| Enclosure | IP20 |
| Operating Temperature | −10°C to 60°C |
| Standards | UL 508, CE, ATEX Zone 2 |
Managed vs. Unmanaged — The Practical Decision
The question isn't which is better in the abstract — it's what the application actually needs. An unmanaged switch is correct for a simple machine network with a controller, HMI, and two drives. It's transparent, requires no setup, and introduces nothing to misconfigure.
The 1783-LMS8 is appropriate when any of the following apply:
- CIP Motion with fast RPIs: QoS ensures servo control traffic isn't delayed by standard I/O or HMI traffic sharing the same physical network.
- DLR ring supervision: the switch can act as the DLR ring supervisor, managing ring topology, detecting cable faults, and rerouting traffic on a break.
- VLAN segmentation: separating the control network from a maintenance or IT network on the same physical switch while preventing cross-network traffic.
- Network diagnostics: port mirroring captures traffic to a monitoring PC for protocol analysis; SNMP provides port-level traffic statistics; event logs record link-state changes for intermittent fault diagnosis.
FAQ
Q: Can the 1783-LMS8 be configured in Studio 5000?
No. The Stratix 2000 series is configured through its own web interface or CLI, not through Studio 5000. Higher-tier Stratix switches (5700, 5400) support Studio 5000 configuration; the 2000 series does not.
Q: Does VLAN configuration affect EtherNet/IP I/O performance?
Properly configured VLANs don't degrade I/O performance. Keep all EtherNet/IP control devices on the same VLAN to ensure multicast and implicit messaging work correctly. Routing between VLANs introduces latency that is incompatible with real-time I/O control.
Q: Is a managed switch required for DLR topology?
A DLR ring supervisor is required — either this switch or a compatible EtherNet/IP communication module in the controller chassis. If the controller's EtherNet/IP module supports ring supervision, an unmanaged switch at the ring head is acceptable for some DLR architectures, but the managed switch provides more visibility and control over ring status.
Q: What is the switch's latency for real-time I/O traffic?
Switching latency for 100 Mbps packets is typically under 10 μs in store-and-forward mode. For EtherNet/IP I/O with RPIs of 5 ms or longer, this latency is negligible. CIP Motion applications with sub-millisecond RPIs should verify latency against the motion system's timing requirements.