GE 252720938AB | Mark VIe Industrial Ethernet Switch

Description

Key Technical Specifications

Procurement note: Available public references consistently associate 252720938AB with GE IS420ESWBH2A, but the detailed electrical and port specifications published online are inconsistent. I would not use unverified claims such as exact port count, power consumption, temperature rating, or Ethernet speed as acceptance criteria without the GE hardware documentation for the specific revision.

Application Scenarios & Pain Points

Ethernet faults in a turbine or plant control network are rarely convenient. A failed switch can look like a controller problem because several downstream devices may disappear at the same time.

• GE Mark VIe control systems: Used as part of the Ethernet communications infrastructure connecting control-system components.
• Industrial controller networks: Provides the network switching function required for communication among compatible GE control hardware.
• Turbine control applications: Particularly relevant to Mark VIe installations where network availability affects controller, I/O, and supervisory communications.
• Maintenance spares: A suitable candidate for sites maintaining legacy or installed Mark VIe equipment where an exact hardware match is preferred over an unverified substitute.

Field note: Before replacing the switch, check whether the fault follows the switch or the network cable. Link LEDs, connector condition, fiber/copper media where applicable, and upstream network equipment should be checked first.

Brief Field Case

On a turbine control cabinet, several communication alarms appearing simultaneously can lead technicians toward the controller or I/O packs. If multiple devices share the same network segment, checking the suspected switch’s link status and individual connections first can save hours of unnecessary controller troubleshooting.

252720938AB

Related Products

• GE IS420ESWBH2A — The model associated with 252720938AB. This is the primary identification to compare against the installed hardware.
• GE 252721013AF — Another GE-associated control-network/interface part appearing in the same industrial automation ecosystem. It should not be treated as a direct substitute without confirming the application and hardware interface.
• GE 252721117AC — Related GE/Sagemcom-marked control-system hardware seen in industrial control inventories; compatibility must be established from the installed system documentation.
• GE IS420ESWBH1A — Related IS420 Ethernet-switch hardware. Port configuration and hardware revision should be compared before considering substitution.
• GE IS420ESWBH3A — Another IS420 Ethernet-switch variant. It may differ in port/interface configuration, making the suffix important for replacement work.
• GE IS420UCSCH2A — Mark VIe controller hardware used elsewhere in the control architecture. It performs control processing rather than Ethernet switching.
• GE IS420UCSBH1A — Another Mark VIe controller platform component. It is complementary network/control hardware, not a direct substitute for the Ethernet switch.
• GE IS420ESWBH2A — The most important related model for procurement because it is the hardware designation associated with 252720938AB. Confirm the complete nameplate before ordering.

The Engineer’s Guide: Field Pitfalls to Avoid

WARNING 1 — Do not order from 252720938AB alone.

The part number is associated with IS420ESWBH2A, but the exact hardware revision should still be verified. Public references are not sufficiently consistent to justify treating every similar IS420 Ethernet switch as interchangeable.

How to avoid it: Request a clear photograph showing the complete GE nameplate, including the model, revision, serial information, and connector/port arrangement.

WARNING 2 — Do not confuse an Ethernet switch with a controller.

The IS420ESWBH2A identification refers to Ethernet-switch hardware. It does not replace a Mark VIe controller such as an IS420UCS-series module.

How to avoid it: Compare the existing cabinet BOM and network drawing before approving the replacement.

WARNING 3 — A power-up test is not enough.

A switch may illuminate normally while one or more Ethernet paths are defective.

How to avoid it: For a used spare, request verification of power-up, link status, port communication, connector condition, and network traffic under load. For critical turbine applications, an actual communications test is much more meaningful than a simple visual inspection.

Frequently Asked Questions (FAQ)

What is GE 252720938AB?

252720938AB is associated with the GE Ethernet switch used in GE Mark VIe control-system environments. Available industrial automation references identify the part in connection with the designation.

Is 252720938AB a Mark VIe controller?

No. It is associated with Ethernet switching/network infrastructure, while Mark VIe controllers such as the IS420UCS family perform the main control-processing functions.

Is 252720938AB the same as ?

Available references associate .

For an actual replacement, however, compare the physical nameplate and revision on the installed unit. That is the safer procurement method than relying on a catalog cross-reference alone.

Can I replace 252720938AB with another IS420 Ethernet switch?

Not automatically.

Check:

1. Exact IS420 model.
2. Complete suffix.
3. Hardware revision.
4. Port count and connector type.
5. Network topology.
6. Existing Mark VIe configuration.
7. Firmware/hardware compatibility.
8. Physical mounting and power requirements.

A switch with the same general function can still be wrong for the cabinet.

What are the key tests for a refurbished 252720938AB?

I would request:

• Power-up verification.
• All-port link testing.
• Ethernet packet/data communication test.
• Connector inspection.
• LED/diagnostic verification.
• Hardware revision confirmation.
• Physical board inspection.
• Burn-in or extended operating test where available.

For a critical control-system spare, “powers on” should not be considered a sufficient test result.

What should I request when purchasing GE 252720938AB?

Request the exact 252720938AB / identification, nameplate photographs, hardware revision, condition statement, test report, and warranty.

Because detailed public specifications for this exact part number are limited and some third-party listings contradict one another, I would require the seller to verify the actual physical unit rather than accepting generic specifications.