The LineSelect® Model 8425 DB37 A/B/C switch allows the user to access three DB37 devices connected to its A, B, and C ports with one DB37 device connected to its COMMON port. The unit is a manually operated switch, requiring no power. Port selection is quick and easy via a front panel rotary switch. The Lineselect® Model 8425 switch is enclosed in a 2U all metal black chassis designed to provide EMI/RFI Shielding.
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Ideal for switching Torque Calibration Systems with multiple Torque Transducers OR Other device-sharing applications that utilize ANY DB37 interface devices
FEATURES OF THE MODEL 8425 A/B/C MANUAL SWITCH:
- Allows (1) COMMON DB37 port to be shared among any one of (3) DB37 ports A, B, or C.
- Manual Operation via front panel mounted rotary switch.
- Manually operated. No power required!
- (3) DB37 Male output ports, (1) DB37 Female input port.
- Custom Length DB37 cables available.
TECHNICAL SPECIFICATIONS:
- PORT CONNECTORS: (3) DB37 male connectors labeled "A", "B", and "C", (1) DB37 female connector labeled "COM"
- FRONT PANEL CONTROLS: (1) Rotary switch allows local switching.
- All pins of the DB37 interface are switched
- POWER: No power required. Manually operated.
- ENCLOSURE: Black box packaging provides EMI/RFI shielding.
- DIMENSIONS: Rackmount 19.0" W x 3.5" H x 10.67" D. (48.3 x 8.9 x 27.2 cm)
- WEIGHT: Approximately 5.4 lbs. (2.5 kg)
Real-World Application & Customer Benefit
A calibration laboratory utilizes the Model 8425 DB37 Switch in a torque calibration system. Previously, the lab had (3) Torque Transducers and (1) Display. Each time the technician switched from one transducer to another, they had to unplug and re-plug cables—a process that introduced wear and tear, increased downtime, and raised the risk of damage to expensive transducer cabling.
By installing the Model 8425, the lab now simply rotates the front-panel switch on the Model 8425 to select the desired transducer (A, B, C) connected to their display (Common port).

The result?
- Reduced cable and connector wear, because the transducers are no longer repeatedly unplugged and plugged.
- Faster switching between transducers, increasing throughput and reducing labor time.
- Lower downtime and cost, since damaged cabling and connectors mean fewer interruptions and repair/replacement expenses.
LineSelect® Model 8425 DB37 A/B/C Switching, Manual Operation:
The drawing illustrates one channel featuring a COMMON Device connected to an RJ45 COMMON port with access to three devices or networks connected to the RJ45 A, B, and C ports, respectively. The switch is controlled locally via a front panel rotary switch.

Ordering Information
- Catalog Number: 308425
- Model Number: 8425
- Base Price: See website or contact us for current pricing and availability.
Documentation & Support
- Specification Sheet (PDF) Download Available.
- Product Manual available upon request.
- For custom fiber optic network switch requirements contact our sales support team 401-943-1164 or email eslab@electrostandards.com
- We welcome international inquiries and ship worldwide.
Shipping and Returns 
- Shipped via UPS ground (unless otherwise requested).
- Freight Charges prepaid and added to invoice. We can estimate freight charges for you.
- Return policy: contact us within 30 days of shipment for an RMA number. Items returned without RMA not accepted. Please refer to our full return policy in our Terms and Conditions found on our website.
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.