Enterasys STK-RPS-150PS Replacement for Stackable Series

Product Overview

Enterasys STK-RPS-150PS Replacement for Stackable Series: Seamless Transition & Legacy System Compatibility

The Enterasys STK-RPS-150PS is a 150W Redundant Power Supply Module designed for the Enterasys Stackable Series switching platform. As Enterasys Networks (now part of Extreme Networks) has progressively discontinued legacy hardware lines, many industrial and enterprise network operators face the critical challenge of sourcing reliable, drop-in replacement units to maintain uptime without committing to a full infrastructure overhaul. TOPNLMS stocks tested, ready-to-ship STK-RPS-150PS units to support your brownfield network continuity strategy.

Whether your facility runs a legacy Enterasys S-Series, B-Series, or C-Series stackable switch chassis, the STK-RPS-150PS slots directly into the dedicated RPS bay without requiring firmware changes, chassis modification, or rewiring of existing power distribution. The module accepts standard AC input and delivers 150W of redundant DC output to the host switch, ensuring that a primary PSU failure does not interrupt network services to connected PLCs, DCS workstations, SCADA servers, or HMI panels on the plant floor.

In industrial control environments, network availability is directly tied to production continuity. A failed power supply in a core switch can cascade into communication loss between a Siemens S7-300 PLC rack and its remote I/O modules, interrupt Modbus TCP polling from a Schneider Electric Quantum DCS controller, or sever EtherNet/IP traffic between an Allen-Bradley ControlLogix processor and distributed drive panels. The STK-RPS-150PS replacement eliminates this single point of failure with a hot-swap-capable redundant supply that restores N+1 power protection to your switching layer.

For sites currently operating Enterasys S4-CHASSIS or S8-CHASSIS multi-slot stackable frames, the STK-RPS-150PS integrates with the existing backplane power architecture. No additional adapter brackets, cable harnesses, or power sequencing modules are required. The physical form factor, connector pinout, and airflow direction match the original factory specification, making this a true drop-in replacement rather than a workaround solution.

When planning a phased network modernization — for example, migrating from an aging Enterasys Stackable core to a current-generation Extreme Networks X465 or X590 series — maintaining the existing Enterasys switching layer during the transition period is essential. The STK-RPS-150PS keeps your legacy stack operational while new equipment is staged, configured, and validated in parallel. This approach minimizes production downtime and allows engineering teams to migrate VLAN configurations, spanning tree topologies, and port security policies without a hard cutover.

Sites running PROFINET, EtherNet/IP, or Modbus TCP over the Enterasys switching fabric will find that the STK-RPS-150PS replacement restores full redundancy without any protocol-level reconfiguration. The switch continues to forward industrial Ethernet traffic at line rate, preserving QoS markings, storm control settings, and port mirroring configurations that industrial network engineers have tuned for deterministic latency requirements.

Compatibility Comparison Table

Seamless Upgrade Solutions

A redundant power supply replacement is rarely a standalone action in a live industrial network environment. When replacing the STK-RPS-150PS, field engineers typically audit the broader switching infrastructure at the same time. If the host Enterasys Stackable switch is also approaching end-of-support, a parallel evaluation of the Extreme Networks X435 or X465 series as a migration target is advisable — these platforms support the same 802.1Q VLAN tagging, RSTP/MSTP spanning tree, and LLDP neighbor discovery that Enterasys switches use, simplifying the configuration migration path.

For sites where the Enterasys stack serves as the aggregation layer for industrial Ethernet segments, the upstream connection typically runs to a core router or Layer 3 switch via SFP uplinks. Stocking spare SFP-1GB-SX or SFP-1GB-LX transceivers compatible with the Enterasys S-Series uplink ports ensures that a transceiver failure does not compound a PSU replacement event into a longer outage window.

In control cabinet environments where the Enterasys switch is mounted alongside a Siemens SCALANCE X200 or X300 series industrial switch, the STK-RPS-150PS replacement restores power redundancy to the Enterasys unit while the SCALANCE handles the field-level PROFINET ring. Ensuring both switches have redundant power is a best practice for IEC 62443-compliant network architecture.

If the Enterasys Stackable switch connects to Allen-Bradley ControlLogix or CompactLogix PLCs via EtherNet/IP, maintaining switch uptime is critical for I/O scanning continuity. A power interruption to the switch — even momentarily — can trigger a major fault in the ControlLogix controller if the I/O connection timeout is set aggressively. The STK-RPS-150PS replacement directly mitigates this risk by restoring N+1 power redundancy.

For sites running Modbus TCP from a Schneider Electric Modicon M340 or M580 PAC to field devices through the Enterasys switching fabric, the same logic applies. The STK-RPS-150PS keeps the switch powered through a primary PSU failure, preserving Modbus TCP polling cycles and preventing false alarms in the SCADA historian. Pairing the PSU replacement with a review of the Modicon communication module firmware version and Ethernet port settings is a recommended commissioning step.

Where the Enterasys stack also carries traffic from Omron NJ/NX series controllers using EtherNet/IP or from Mitsubishi MELSEC iQ-R series PLCs using CC-Link IE Field Basic over standard Ethernet, the STK-RPS-150PS replacement ensures that the switching layer does not become the weakest link in an otherwise redundant control architecture. Documenting the replacement in the site’s maintenance log and updating the network topology diagram are standard post-replacement steps.

Retrofit Guidance FAQ

Q: Does replacing the STK-RPS-150PS require powering down the host switch?
A: The Enterasys Stackable Series supports hot-swap of the RPS module in most chassis configurations. Refer to the original Enterasys hardware installation guide for your specific chassis model (S4-CHASSIS or S8-CHASSIS) to confirm hot-swap eligibility before proceeding on a live network.

Q: Will the replacement unit affect switch configuration or VLAN settings?
A: No. The STK-RPS-150PS is a hardware power module with no firmware or configuration interface. Replacing it has no effect on the switch’s running configuration, VLAN database, spanning tree state, or port settings.

Q: Is the replacement unit compatible with both AC and DC-powered chassis variants?
A: The STK-RPS-150PS is an AC-input module (100–240V AC). If your chassis uses a DC-input power supply variant, please contact TOPNLMS at [email protected] to confirm the correct part number before ordering.

Q: Can this unit replace a failed PSU in a chassis that is still running industrial Ethernet protocols such as EtherNet/IP or PROFINET?
A: Yes. The replacement is transparent to all Layer 2 and Layer 3 protocols running on the switch. EtherNet/IP, PROFINET, Modbus TCP, and standard IEEE 802.3 Ethernet traffic continue uninterrupted during and after the PSU replacement, provided the host switch remains powered by the primary supply during the swap.

Q: What is the lead time and shipping method?
A: TOPNLMS ships from Xiamen, China. Standard international express (DHL/FedEx) delivery is 3–7 business days to most destinations. Expedited same-day dispatch is available for orders confirmed before 14:00 CST. Contact [email protected] or +86 18359293191 for urgent requirements.

Q: How is the unit tested before shipment?
A: Each STK-RPS-150PS unit undergoes bench-level power-on testing and output voltage verification before packaging. A test report is available upon request for quality-critical procurement processes.

Warranty Assurance

Every STK-RPS-150PS replacement unit supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. This warranty covers manufacturing defects, output voltage deviation, and premature failure under normal operating conditions. If a unit fails within the warranty period, TOPNLMS will arrange a replacement shipment at no additional cost after fault confirmation.

Pre-shipment testing includes power-on verification, output load testing, and visual inspection for physical damage. Units that do not pass testing are not shipped. A certificate of conformance and test record are available upon request for regulated industries or ISO 9001-compliant procurement workflows.

After-sales support is available via email at [email protected] and by phone at +86 18359293191 during business hours (CST, Monday–Saturday). TOPNLMS maintains stock of multiple units to support rapid replacement dispatch in the event of a warranty claim, minimizing the time your control system operates without redundant power protection.

For procurement teams requiring documentation packages — including datasheet, test report, packing list, and commercial invoice — these are prepared as standard for all orders and dispatched with the shipment or via email prior to delivery.