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Catalog # 303720 - Model 4720 Remotely Controllable DB25 A/B Switch

    Remotely Controllable DB25 A/B SwitchRemotely Controllable DB25 A/B SwitchRemotely Controllable DB25 A/B SwitchRemotely Controllable DB25 A/B Switch
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    • Remotely Controllable DB25 A/B Switch
    • Remotely Controllable DB25 A/B Switch
    • Remotely Controllable DB25 A/B Switch
    • Remotely Controllable DB25 A/B Switch
Base Price:
Catalog No: 303720
Model No: 4720
Product Type:Switches: Copper
Cable Type/Port Connector:DB25 Switch Ports
Channels per Switch Chassis:1
Electronic Switches/Power Required:PathWay® Copper
Remote Control:Auto Fallback
Auto Fallback:ASCII Trigger Detector
Pins Switched:1 thru 8 and 20
Local Control:Pushbutton
Feature:Custom Protocol
Protocol:ASCII Trigger Monitor


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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PathWay® Remotely Controllable Network Switch, DB25
Model 4720 Single Channel DB25 A/B Switch, Monitor A & B for Control, Custom Protocol


  • PORT CONNECTORS: (3) DB25 female connectors labeled A, B, and COMMON.
  • FRONT PANEL CONTROL: (1) Manual pushbutton allows local switching.
  • DISPLAY: (2) Red LED's display switch position, and power status.
  • POWER: UL approved, wall mount, 100VAC/240VAC, 50Hz/60Hz wall mount power module supplies 12VDC, 500mA to the unit. Has 2-prong, US, non-polarized plug.
  • DIMENSIONS: 7.75" W x 7.25" D x 2.0" H (19.7 x 18.4 x 5.1 cm).
  • WEIGHT: Approximately 2.5 lbs. 1.13 kg

PathWay® Model 4720 Remotely Controllable DB25 A/B Switch Application with Monitor A & B for Control, Custom Protocol:

The drawing illustrates a single channel of DB25 switching. A COMMON device connected to the DB25 COMMON port has access to other devices connected to the DB25 Port A (PRIMARY LINE), and the DB25 Port B (BACKUP LINE). The switch monitors data on ports A (PRIMARY LINE) and B (BACKUP LINE) and responds to custom protocol ASCII character.

PathWay Model 4720 RS232 DB25 Application illustrating switch control via trigger character.


  • Model 4720 allows quick connection to any one of two DB25 interface devices from one COMMON device.
  • Switches pins 1 - 8 and 20 of the DB25 interface via break-before-make electromechanical relays.
  • Local control via front panel pushbutton.
  • Data on both ports A and B looked to for ASCII character command sequences — "Switch to A" commands received and responded to on port A; " Switch to B" commands received and responded to on port B.
  • ASCII commands are identified, stripped from data stream, and not allowed to pass through the A/B Switch unit.
  • Each received command is responded to for positive receipt of command acknowledgement.
  • Custom command protocol designed to enable the A/B Switch unit to respond per command acknowledge receipt of command and provide status information per command request.
  • RS232 multi-drop configuration for monitored data on ports A and B.
  • Each Switch has a programmable dip switch to create its unique address/identity.
  • Commands include CHANGE switch position, QUERY switch position status, and LOCKOUT/UNLOCK front panel control.
  • Front panel LED's display switch position and power status.
  • Retains last switch position in the event of power loss and continues to pass data.
  • Attractive anodized black box packaging provides EMI/RFI shielding.
  • Custom length DB25 cables available for your switch installation. 

The PathWay® Model 4720 Remotely Controllable DB25 A/B Switch monitors the data on its A and B ports and responds to custom protocol ASCII character "Switch to A" or "Switch to B" command sequences.  Local control is also available via front panel pushbutton.

Option: Wide Range Power Supply: (Cat No. 517277) CE, RoHS, and UL listed table mount power module, 100VAC/240VAC, 50/60Hz for use in place of the standard power module that is included with the unit. Has IEC 60320 C14 inlet. Ideal for international applications.

For custom network switches call our friendly customer support staff at 401-943-1164, email eslab@electrostandards.com, or complete our custom product request form.

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

All ESL products are available for export. Electro Standards welcomes business from International companies: commutateur de réseau, conmutador de red, switch di rete, przelacznik sieciowy , switch de rede, nätverksswitch.

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.

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