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304505 Model 4505 DB9 A/B/C/D Manual Switch

    DB9 A/B/C/D Manual SwitchDB9 A/B/C/D Manual SwitchDB9 A/B/C/D Manual Switch
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    • DB9 A/B/C/D Manual Switch
    • DB9 A/B/C/D Manual Switch
    • DB9 A/B/C/D Manual Switch
Base Price:
Catalog No: 304505
Model No: 4505
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


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 Switch, Rotary Switch
Model 4505 DB9 A/B/C/D Switch with Manual Operation

  • Ideal for device-sharing applications; Applicable to ANY DB9 interface devices


  • PORT CONNECTORS: (5) DB9 female connectors labeled A, B, C, D, and COMMON.
  • FRONT PANEL CONTROL: (1) Front panel rotary switch allows selection of switch position.
  • POWER: No power required. Manually operated.
  • DIMENSIONS: 4.19" W x 1.86" H x 6.73" D. (10.7 x 4.19 x 17.1 cm)
  • WEIGHT: Approximately 1.2 lbs. (0.6 kg)

LineSelect® Model 4505 Manually Operated DB9 A/B/C/D Switch Application:

The drawing illustrates a four-position switch that is manually operated via front panel rotary knob. A COMMON device connected to the DB9 COMMON port has access to any one of four DB9 interface devices connected to the four DB9 ports labeled A, B, C and D via the front panel rotary switch selector knob.

LineSelect® Model 4505 DB9 A/B/C/D APPLICATION: Switch any DB9 interface


  • Allows quick connection to any one of four devices from one COMMON device.
  • High quality sealed switch with self-wiping contacts.
  • The switch ports are transparent to all data.
  • All (9) pins of the DB9 interface are switched via break-before-make rotary switch.
  • Eliminates the need to plug and unplug cables.
  • Manual operation, no power required.
  • Attractive all metal, black box packaging provides EMI/RFI shielding.
  • Lifetime warranty against manufacturing defects.
  • Custom length DB9 cables available for your switch installation.

The LineSelect® Model 4505 DB9 A/B/C/D Switch allows the user to reroute data between any one of four devices to one COMMON device with the simple rotation of a selector switch.  All nine pins of the DB9 interface are supported. No need to plug and unplug interconnection cables thereby eliminating connector wear and/or errors when reconfiguring networks. The LineSelect® Model 4505 is packaged in a slim desktop style enclosure.

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 

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