IEM-3400-8S – 8xGE SFP Ports – IE3400 Expansion Module – Non-PoE

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IEM-3400-8S Description

The IEM-3400-8S is a Cisco Catalyst IE3400 Rugged Series expansion module that adds fiber ports to an IE-3400-8T2S or IE-3400-8P2S industrial switch. The module has eight Gigabit Ethernet SFP ports with no PoE, draws 27W and takes the system to 18 ports. Expansion modules are not hot-swappable, so the module goes on with the base switch powered down.

Quick Specs

Parameter

Specification

SKU

IEM-3400-8S

Cisco ordering PID

IEM-3400-8S=

Product type

Expansion module

Compatible base switch

Cisco IE-3400-8T2S or IE-3400-8P2S

Added port count

8 ports

Port media

Gigabit Ethernet SFP

PoE support

No

90-W PoE support

No

Advanced hardware features

Yes

Total system ports with module

18 ports

Module power consumption

27 W

Hot-swap support

Expansion modules are not hot-swappable

Application Scenarios

Fiber Ports For Remote Devices

In a plant cabinet, the module gives an IE3400 base switch eight SFP ports for fiber runs to remote machines or neighboring cabinets beyond copper reach.

Planned Shutdown Installation

Because the module cannot be hot-swapped, an operations team attaches it while the base switch is de-energized during a maintenance window.

Product Comparison

Parameter

IEM-3400-8S

IEM-3400-8T

IEM-3400-8P

IEM-3300-8S

Copper (RJ45) ports

Not applicable

8

Not applicable

Not applicable

PoE/PoE+ ports

Not applicable

Not applicable

8

Not applicable

SFP ports

8

Not applicable

Not applicable

8

Total system ports (including expansion module)

18

18

18

18

Power consumption

27W

12W

20W (measured at 54V)

19W

Compatible base switch

IE-3400-8T2S or IE-3400-8P2S

IE-3400-8T2S or IE-3400-8P2S

IE-3400-8P2S

IE-3300-8T2S, IE-3300-8P2S, IE-3300-8U2X or IE-3400-8T2S

Advanced hardware features

Yes

Yes

Yes

No

IEM-3400-8S is the Gigabit SFP module of the IEM-3400 group: it adds eight SFP ports, while IEM-3400-8T adds eight copper ports to the same IE-3400-8T2S and IE-3400-8P2S bases at 12W against 27W. Powered copper endpoints on the added ports need IEM-3400-8P, which supports PoE/PoE+ but fits only IE-3400-8P2S. IEM-3300-8S has the same eight SFP ports at 19W and fits IE-3300-8T2S, IE-3300-8P2S, IE-3300-8U2X and IE-3400-8T2S, but its advanced hardware features are listed as No against Yes for IEM-3400-8S, and Cisco notes that an IEM-3300 module on an IE3400 base makes SGT/SGACL unavailable. All four modules give 18 ports in total and none supports 90-W PoE.

Ordering Checklist

  • Supported hosts: Pair the module with the IE3400 base switches IE-3400-8T2S and IE-3400-8P2S. The module is built for the IE3400 bases; the IE3300 bases take the IEM-3300 modules instead.

Specifications

Parameter Specification Parameter Specification
Product ID IEM-3400-8S Cisco ordering PID IEM-3400-8S=
Product type Expansion module Compatible base switch IE-3400-8T2S or IE-3400-8P2S
Total system ports with module 18 ports Expansion port count 8 ports
Port media Gigabit Ethernet SFP PoE support No
90-W PoE support No Advanced hardware features Yes
Module power consumption 27 W Expansion module count One expansion module attached to a base system at a time
Hot-swap support Not hot-swappable Installation warning Do not attach the expansion module while the switch is energized
Primary comparison SKUs IEM-3400-8T, IEM-3400-8P, IEM-3300-8S

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Quality Certifications

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    Alexis Mason
    Posted on 02/01/2026
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    We reported a minor packaging concern. They acknowledged it and adjusted for our next order.

    Anna Hernandez
    Posted on 21/12/2025
    Verified Buyer
    4.0

    Tracking was provided immediately and the package arrived exactly when promised.

    Jacob Martin
    Posted on 16/12/2025
    Verified Buyer
    5.0

    Pricing made it possible to buy spares, which we couldn’t afford otherwise.

Questions & Answers

  • Can IEM-3400-8S be attached to a Catalyst IE3300 base switch?

    No. Per the Cisco IE3x00 release notes for the module family, IEM-3400-8S provides 8 non-PoE Gigabit SFP ports and works with IE3400 base systems only. The IE3300 bases take the IEM-3300 modules, so an IE3300 order must not include IEM-3400-8S as its expansion module.
  • How many expansion modules can an IE3400 base switch take together with IEM-3400-8S?

    One expansion module attaches to a base system at a time. IEM-3400-8S takes the system to 18 ports, and a second expansion module cannot be added on top. Treat the eight SFP ports as the single expansion step for the base switch.
  • Does IEM-3400-8S supply PoE to devices on its SFP ports?

    No. IEM-3400-8S has eight Gigabit Ethernet SFP ports with no PoE, and 90-W PoE is not supported either. Powered endpoints connect to the base switch ports or to a separate power source. The module is meant for fiber runs and draws 27 W.
  • Can IEM-3400-8S be installed while the IE3400 base switch is running?

    No. IEM-3400-8S is not hot-swappable, so the base switch must be de-energized before the module is attached or removed. Plan the work for a maintenance window, with the base switch powered down for the full installation and powered up again only after the module is seated.

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DataSheet Downloads

  • IEM-3400-8S Datasheet