401-943-1164 / US & Canada Toll Free: 877-943-1164

305912 Model 9447 DB9 2-Position Switch

    DB9 2-Position SwitchDB9 2-Position SwitchDB9 2-Position SwitchDB9 2-Position Switch
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    • DB9 2-Position Switch
    • DB9 2-Position Switch
    • DB9 2-Position Switch
    • DB9 2-Position Switch
Base Price:
Catalog No: 305912
Model No: 9447
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


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 / RS232 Manual Network Switch, Rotary Switches
LineSelect® Model 9447 DB9/RS232 A/B Manual Data Network Switch, Rackmount

  • Highly reliable A/B switch for any DB9 connector interface!

  • Popular for switching DB9 data interface of PC's, servers, keyboard, mice, joysticks, and more!


  • 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: Rackmount configuration, 19.0" W x 1.75" H x 8.74" D. (48.3 x 4.4 x 22.2 cm)
  • WEIGHT: Approximately 3.9 lbs. (1.8 kg)

LineSelect® Model 9447 DB9 RS232 A/B Switch Application:

The diagram illustrates a Workstation or Computer connected to the DB9 COMMON port with access to Device A and Device B, connected to the DB 9 Port A and DB9 Port B, respectively.

LineSelect® Model 9447 DB9 RS232 A/B Switch Application


  • Allows access to two DB9 networks from one computer or workstation.
  • Manual operation via front-panel rotary switch.
  • High quality sealed switch with self-wiping low impedance contacts.
  • The switch ports are transparent to all data.
  • All 9 pins of the DB9 interface are switched via break-before-make rotary switch.
  • Improves computer efficiency by allowing sharing of peripherals.
  • Eliminates the need to plug and unplug cables.
  • No external power required.
  • Attractive all metal, black box packaging provides EMI/RFI shielding.
  • Custom length DB9 cables available for your switch installation.
  • Lifetime warranty against manufacturer defects.

The LineSelect® Model 9447 enables easy access to two networks. It allows the user to reroute data between the two networks with a simple flip of the switch. The unit supports all 9 pins of the DB9 interface. No need to plug and unplug cables there by eliminating connector wear.

The LineSelect® Model 9447 is enclosed in a 1U, full rack size, all metal, black chassis designed to provide EMI/RFI shielding and fit in a standard 19" rack. 

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/

Don't forget to order your DB9 Cables! 

Custom Length DB9 cables available for your switch installation. 
State cable length (in Feet) when ordering.
Part Number  Description
990127  DB9 F/F, 9-Conductor Unshielded PVC Cable
990125  DB9 M/F, 9-Conductor Unshielded PVC Cable
990126  DB9 M/M, 9-Conductor Unshielded PVC Cable 

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