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DB9 All Female Connectors Catalog # 305430 - Model 9047 2-Position Switch

    DB9 Female Connectors 2-Position SwitchDB9 Female Connectors 2-Position SwitchDB9 Female Connectors 2-Position SwitchDB9 Female Connectors 2-Position SwitchDB9 Female Connectors 2-Position Switch
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    • DB9 Female Connectors 2-Position Switch
    • DB9 Female Connectors 2-Position Switch
    • DB9 Female Connectors 2-Position Switch
    • DB9 Female Connectors 2-Position Switch
    • DB9 Female Connectors 2-Position Switch
Base Price:
Catalog No: 305430
Model No: 9047
Product Type:Switches: Copper
Cable Type/Port Connector:DB9 Switch Ports
Channels per Switch Chassis:1
Manual Control/No Power Required:LineSelect® Manual Operation
Pins Switched:9
Local Control:Rotary Knob
Feature:Modular Design for System Expansion

  • All Female DB9 Connectors

Shipping Terms

Shipments are made via UPS Ground, unless otherwise specified. Freight charges are prepaid and added to your invoice. We can estimate the freight costs for you.

We can ship freight collect on your account, just provide your UPS Account Number.

We can also ship via the carrier of your choice. Provide the details and your account number.

Products shall be shipped F.O.B. Electro Standards' facility. Title to and risk of loss or damage to the products shall pass to you upon Electro Standards delivery of the products to a carrier for shipment. Title to software will remain with the applicable licensor. Electro Standards' prices do not include shipping and handling charges. Electro Standards reserves the right to use its own discretion in the manner and routing of shipments. Electro Standards shall be permitted to deliver products in separate lots.

Shipping Return Policy

  • To return an item, contact Electro Standards at 401-943-1164 to obtain a Return Material Authorization (RMA) number. RMA numbers are valid for 30 days after the date of the shipment and cannot be extended or re-issued. We are unable to accept returns without an RMA number.
  • All returns except those of defective product are subject to a 15% restocking fee, and additional charges for handling or freight are refunded only in cases of defective products.
  • Return freight must be shipped prepaid. We recommend that you insure the package as you are responsible for risk of loss on all returned packages. We recommend that all cartons are properly packed as Electro Standards is not responsible for product damaged en route. We do not issue call tags for product returns.
  • Returned product must be clean, undamaged, and complete with all manuals, accessories, documents and packaging. The items must be in a resalable condition.
  • The product must have with it a copy of the original invoice or packing slip and the appropriate RMA paperwork.
  • If your item is not working properly, please contact Electro Standards at 401-943-1164 for help in trouble-shooting your application.
  • If the product is defective, Electro Standards will repair or replace that item (at our discretion) upon receipt and evaluation of the original product.
  • Electro Standards reserves the right to authorize product returns after 30 days from the invoice date in some cases. If the product is accepted after 30 days, credit will be issued toward future pruchases only and some additional restocking charges may be applied.
  • All credits from RMAs must be used within one calendar year of issue.

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DB9 Manual Network Switches, All DB9 Female Connectors
Model 9047 A/B Manual Switch Module (FFF),

  • Rackmount Configuration, Network Switch

  • High Quality Manual Data Network Switches Increase the Reliability of Your Network!


  • PORT CONNECTORS: (3) DB9 female connectors labeled A, B, and COMMON.
  • FRONT PANEL CONTROL: (1) Rotary switch on front panel selects A or B.
  • POWER:  No power required.  Manually Operated.
  • DIMENSIONS:  Module 2.0" W x 5.0" H x 8.0" D (5.1 x 12.7 x 20.3 cm).
  • WEIGHT: Approximately 0.5 lb. (0.3 kg)

LineSelect® Model 9047 DB9 A/B SWITCH MODULE APPLICATION: (The DB9 ports are all Female Connectors.)

The drawing illustrates ALL DB9 Female ports, A, B and COMMON. The DB9 cables are ALL DB9 male connectors. A COMMON device connected to the DB9 COMMON port can access either Device A or Device B using the front panel rotary switch. 

LineSelect® Model 9047 DB9 All female port connectors A/B Switch Module


  • Allows quick connection to any one of two DB9 devices from one COMMON device.
  • All 9 pins of the DB9 interface are switched via break-before-make rotary switch.
  • Manual operation via front-panel rotary switch.
  • High quality sealed switch with self-wiping low impedance contacts.
  • Transparent to data speed and format.
  • No external power supply required.
  • Attractive anodized aluminum packaging provides EMI/RFI shielding.
  • Slides into Model 9025 Module Rack or attaches to surface-mounted Vertical Mounting Plate Model 9417 (Cat. No. 500417).
  • Model 9047 Manual AB Network Switch connectors are all female (FFF)
  • For a similar module, but with all male connectors see Model 9247, Catalog No. 305247.
  •  Lifetime guarantee against manufacturing defects.
  • Municipalities, schools, government: The Model 9047 is on GSA Schedule!

The LineSelect® Model 9047 allows the user to access two DB9 devices connected to the A and B ports from one DB9 device connected to the COMMON port.  Switching between devices A and B is quick and easy via the front panel rotary selector. The Model 9025 Rack accommodates up to eight Model 9047 switch modules, as your requirement grows.

System Expands to meet your needs!

This modular approach to switch system requirements allows expansion to more channels on an as-needed bases. Filler panels are available to attractively cover unused module slots. Model 9008, Cat No 305983 for a two inch filler panel.

Model 9025 Rackmount Chassis for Switch Modules (Cat No 305972) Features:

  • Rack can accommodate up to eight Model 9047 A/B modules (2.0" W).
  • Rackmount chassis supports multiple switch module chassis of various widths.
  • Rack Size: 19" W x 5.25" H x 7" D. (48.3 x 13.3 x 17.8 cm)
  • Full opening for modules is 16.8" W. (42.7 cm)

Model 9025 Rack Chassis illustrated with a 2" filler panel Model 9008 and Module Guides. Other filler panel sizes are available!


  • Module rack filler panel, 2.0" W, Cat No 305983 - Model 9008.
  • Module rack filler panel, 0.8" W, Cat No 305981 - Model 9011.
  • Other filler sizes available.

Model 9417 Vertical Mounting Plate for Switch Modules (Cat No 500417):

  • Dimensions 5.0" H x 5.5" W (12.5 x 13.8 cm)
  • 1/6" Aluminum with four Pem fasteners, aligned for easy mounting of any 5.0" high module.


This high-quality network switch is available to city, state, and federal government purchasers at a discounted price and favorable payment and shipping terms via GSA Schedule GS-35F-0286V. Click here for GSA details.

LineSelect® Model 9047 is available to government purchasers on our GSA Schedule GS-35F-0286V. Call for discounted price and terms.

Electro Standards can supply all your Network Cable requirements. Click here to reach our CABLES, COPPER NETWORK Webpage.

For custom network switches call our friendly customer support staff at 401-943-1164, email eslab@electrostandards.com, or complete our online form: /Products-Custom/Copper-Switch/

All data switches, data communication products, and data acquisition products are subject to a one year warranty against manufacturing defects.  The limit of ESL liability is limited to the cost of the ESL product provided.

*Prices online are subject to change and verification.

All ESL products are available for export.

Electro Standards welcomes International inquiries: commutateur d'ordinateur,  equipo interruptor, interruttore del calcolatore, interruptor do computador, dator switch.

Available Combo Deals