Derail Boxes

Derail Boxes

Derail boxes are emergency systems that keep locomotives off restricted tracks.

 

When activated, an actuator pushes a rod forward, forcing a derailer at the end of the rod over the top of the rail. Warning lights indicate the derail status.

 

Derail boxes are sealed and may be flush mounted using straight rods or raised using offset rods.

 

Derail box systems may be hardwired or wirelessly controlled. Controls can be supplied as an external panel or as part of a touchscreen system.

Learn more about Snyder Derail Boxes here

 

Derail Brochure

FAQS

Got questions? We’ve got answers.

  • How far away from the track should the derail box be mounted?

    The actuator box location will vary, depending on whether the derail is located on the far or near rail, as well as on the length of actuating rod that is used. Once the sliding derail is installed and the actuating rod attached, the derail box may be located. 


    With the sliding derail removed from the rail, connect the actuating rod to the derail box and operate the derail to ensure that it operates smoothly with no binding. The limit switches inside of the derail box may require adjustment, or the alternate clevis might be needed.

  • What do the warning lights mean?

    The amber light indicates that the derail is completely removed from the rail. The blue light indicates that the derail is in place on the rail. If no light indication is shown, it could mean that the derail is in motion, or it has not tripped one of the limit switches inside the actuator box.

  • What is the difference between SECO-EDRB-SD-CH and SECO-EDRB-SD6?

    Snyder offers two different types of sliding derails, the Western-Cullen-Hayes (SECO-EDRB-SD-CH) and the Nolan (SECO-EDRB-SD6).


  • My wireless derail system is not communicating. How do I fix this?

    Verify that the system has power and that the switch inside the derail box is set to AUTO. (The MAINT position overrides the control system.) Otherwise, verify the IP connection and SSID are correctly set and check for potential new sources of interference with the wireless system.

  • The derail will no longer slide over the track. How do I fix this?

    Verify that the derail and rod are still in proper alignment with the track and that no settling or movement has occurred. Check for physical damage on either the derail or the rod.