Description
Enterasys C2RPS-PSM / STK-RPS-150PS Redundant Power Supply
Product Overview
The Enterasys C2RPS-PSM is an external redundant power-supply module designed for the Enterasys SecureStack C2 switching platform. It does not function as a PLC power supply, industrial control power module, or network switch itself. Its job is much narrower: provide a separate 12 VDC power source to a compatible switch so that the switch can continue operating if its primary internal power supply fails. Enterasys documentation identifies the C2RPS-PSM as a redundant power module with hot-swap capability and a 12 VDC output. The original documentation specifies an AC input range of 85–264 VAC and 47–63 Hz.
The STK-RPS-150PS is the later replacement for the C2RPS-PSM. Extreme Networks documentation explicitly states that the STK-RPS-150PS replaced the C2RPS-PSM and can be used with the older C2RPS-CHAS2 and C2RPS-CHAS8 shelves. The newer STK-RPS-150PS can also be installed in STK-RPS-150CH2 and STK-RPS-150CH8 shelves. This makes the pair relevant when maintaining older Enterasys network infrastructure where the original RPS module is no longer the preferred procurement reference.
From a maintenance perspective, the important point is that this is a switch-specific redundant power architecture, not a generic 12 VDC supply. The RPS cable and connector carry the power and status interface between the supply and switch. Enterasys documentation specifically warns against substituting arbitrary cables.
Product Introduction
When an older SecureStack switch loses its internal power supply, replacing the complete switch is not necessarily the first maintenance step. The C2RPS-PSM was designed to provide external redundant power, while STK-RPS-150PS provides the documented successor path for compatible non-PoE switch installations.
For a legacy network replacement, the critical check is not simply “12 VDC.” Confirm the switch model, PoE status, RPS connector, cable, and shelf configuration before substituting the newer STK-RPS-150PS.
Key Technical Specifications
| Parameter | ||
|---|---|---|
| Manufacturer / Brand | Enterasys Networks | Enterasys / Extreme Networks |
| Product Type | Redundant Power Supply Module | Redundant Power Supply Module |
| Input Voltage | 85–264 VAC | 85–264 VAC |
| Input Frequency | 47–63 Hz | 47–63 Hz |
| Output Voltage | 12 VDC | 12 VDC |
| Output Current | 1.0 A minimum; 8.5 A or 13.0 A maximum | 1.0 A minimum; 8.5 A or 13.0 A maximum |
| Maximum Continuous Power | 102 W or 156 W | 102 W or 156 W |
| Dimensions | 19.6 × 5.2 × 25.7 cm | 19.6 × 5.2 × 25.7 cm |
| Weight | 1.75 kg | 1.75 kg |
| Primary Application | SecureStack C2 RPS | Compatible non-PoE stackable/standalone switches |
| Legacy Replacement | Original unit | Replacement for |
The published documentation uses the 102 W / 156 W figures because the maximum output current depends on the applicable configuration. The commonly used “150 W” designation refers to the product class rather than meaning that every operating condition delivers exactly 150 W continuously.
Major Features / Practical Advantages
1. External Redundant Power Architecture
The allows the switch to receive power from an external source separate from its internal supply. This provides a useful layer of power redundancy for network equipment where an unexpected switch shutdown would interrupt connected devices.
The original SecureStack documentation explicitly identifies hot-swap capability for the .
That said, “hot-swap capable” should not be interpreted as permission to connect or disconnect the RPS cable under every operating condition. Later Extreme documentation specifically instructs users to power down the switch and RPS before cabling an to an operational switch. The exact procedure therefore depends on which generation and installation architecture is being serviced.
C2RPS-PSM-STK-RPS-150PS
2. 12 VDC Output for Compatible Switches
Both the and provide a nominal 12 VDC output. The supply is intended to feed the dedicated redundant-power interface on compatible network switches rather than serve as a general-purpose field DC supply.
This distinction matters during procurement. A generic 12 VDC, 150 W industrial power supply is not automatically a substitute because the RPS connector includes dedicated interface and status functions.
3. Broad AC Input Range
The documented 85–264 VAC input range allows the module to operate across common nominal AC supply systems. The specified input frequency is 47–63 Hz.
For retrofit work, this makes the AC input side relatively straightforward. The more difficult compatibility question is normally on the DC output and RPS interface side.
4. Direct Replacement Path
Extreme Networks explicitly identifies the as the replacement for the . The newer unit can be installed in the older C2RPS-CHAS2 and C2RPS-CHAS8 shelves, while also supporting the newer STK-RPS-150CH2 and STK-RPS-150CH8 shelves.
This is useful for long-running installations where the original Enterasys power architecture is still in service but the original spare pool has become difficult to maintain.
5. Non-PoE Application Boundary
The is specifically intended for compatible switches that do not support PoE. Extreme Networks warns against connecting it to a PoE-compliant fixed switch.
This is probably the most important procurement trap. Do not select an RPS solely because the connector appears similar. PoE switch families can require substantially different power capacity and keyed connectors.
6. Dedicated RPS Cable
The original Enterasys documentation specifies a dedicated cable and warns that an unapproved cable should not be substituted. The documentation likewise specifies use of the supplied RPS cable.
For surplus or used equipment, therefore, the cable is worth checking separately. A bare power module without the correct RPS cable may not constitute a ready-to-install replacement.
Related Products
- STK-RPS-150CH2 — Two-slot shelf designed to house redundant power modules.
- STK-RPS-150CH8 — Eight-slot shelf for multiple modules.
- C2RPS-CHAS2 — Older two-slot Enterasys RPS chassis compatible with the generation and later .
- C2RPS-CHAS8 — Older eight-slot RPS chassis for the C2 redundant power architecture.
- — Dedicated cable used with the original system.
- C2RPS-POE — Higher-power RPS family intended for PoE-capable switch applications; it should not be confused with the non-PoE .
- SecureStack C2 — Switch family for which the original was designed.
- A4 Series — Enterasys fixed-switch family documented with support in applicable non-PoE configurations.
FAQ
Is a direct replacement for ?
Yes, within the documented compatible RPS architecture. Extreme Networks explicitly states that replaced and that it can also be installed in the older C2RPS-CHAS2 and C2RPS-CHAS8 shelves.
Can I use with a PoE switch?
Do not assume compatibility. The original documentation specifically warns against use with SecureStack C2 PoE devices, while the newer is specified for non-PoE switch models.
Can I hot-swap the ?
The original C2 documentation describes the as hot-swap capable. However, the later installation documentation gives a more conservative procedure and recommends powering down the switch and RPS before cabling them together. Follow the procedure applicable to the exact switch and RPS generation rather than assuming unrestricted live connection.
Does output 12 VDC?
Yes. The published specifications identify a 12 VDC output with a minimum output current of 1.0 A and maximum values of 8.5 A or 13.0 A depending on the specified operating configuration.
Does this power supply contain firmware?
No firmware-dependent control function is identified for the power module. It is a dedicated redundant power supply rather than a managed network switch or programmable controller.
Can I replace it with any 12 VDC 150 W power supply?
No. The output voltage alone is insufficient for a replacement decision. The RPS connector, status interface, cable, switch compatibility, and PoE/non-PoE architecture all matter. Enterasys/Extreme documentation specifically identifies a dedicated RPS cable for this application.
Is a New Surplus equivalent to factory-new stock?
Not automatically. For a legacy network power module, procurement should verify the exact label, revision, connector condition, fan operation, AC input test, 12 VDC output under load, and included RPS cable. Storage condition matters too, particularly for older fan-cooled power equipment.
Procurement Note
The → relationship is unusually well documented, so this is one case where a replacement part number can be stated with reasonable confidence. Extreme Networks explicitly identifies as the successor to .
For an actual replacement order, however, match the switch model and PoE status first, then verify the RPS shelf and cable. Do not buy a generic 12 VDC supply as a substitute merely because its wattage appears similar. The RPS interface is part of the system, not just an output connector.
