DORMA ED900: A Low Energy Operator For Any Application

June 1, 2015
Features include easy installation and extensive customization and programming options

The ED900 Low Energy Operator is DORMA’s most advanced low-energy swing door power operator. Opening doors to provide access at precisely controlled speeds and forces, it assures safety for users — particularly the elderly, children, and persons with disabilities.

In 2012, DORMA introduced the ED900, providing a product that’s not only fully ADA compliant, but also offers ease of installation, superior function, and versatility with its state-of-the-art electromechanical drive and microprocessor motion control system.

“The ED900 offers built in features and functions that other low energy operators don’t provide,” says Bob Brokamp, OEM National Account Manager at DORMA USA.

The operator is exceptionally quiet, and it has obstacle detection in the automatic mode. It accommodates the use of motion and presence sensors on both sides of the opening. Under power failure conditions, the closing speed is field-adjustable. It also has positive mechanical stops to prevent the door from opening past 90 degrees (or a pre-determined angle).

The ED900 is up to 65 percent smaller than other low energy operators on the market. Its onboard power supply reduces the need for a secondary power source in many applications. It also includes a blow-open feature for smoke ventilation (per NFPA code 92B) and a permanent hold-open option.

Another distinct advantage of the ED900 is that while most low energy doors need to be replaced if an application calls for changing to high energy, DORMA can easily make the switch by replacing the compact ED900 unit with an identical size full energy unit rather than replacing the entire door.

Certifications and Approvals of the ED900 include:

ADA (Americans for Disabilities Act)-Fully ADA compliant

ANSI ICC A117.1 Accessible and Useable Buildings and Facilities

Underwriters Laboratories: ANSI/UL325 Door, Drapery, Gate, Louver, and Window Operators and Systems

ANSI/BHMA 156.19 Power Assist and Low Energy Power Operated Doors

UL10C Fire Listing

California State Fire Marshal (CSFM)

Onboard Power Supply: ANSI/UL294 Access Control System Units

 “One of the things our customers say they like best about the ED900 is that unlike plain vanilla low energy operators, it has programmable features integrated within it,” states Brokamp. “Everything you need to install it comes packaged with it, and it’s expandable on the opening.”

It also comes in a full complement of painted and architectural finishes so not only does it provide superior functionality, it’s aesthetically versatile as well.

Simple Installation

The ED900 is the smallest low energy operator on the market, enabling a single installer to mount it with ease.

Step 1: Drill conduit hole on the doorframe.

Step 2: Install backplate on frame.

Step 3: Attach guide pins to backplate to hold unit in place while fastening it.

Step 4: Place cover on unit.

It’s that simple.

Next, before programming the unit, make note of the door values including:

Door width

Door type (single or pair)

Mount (Push or Pull side)

Depth of reveal


The ED900 offers a broad range of programming options to accommodate varied facilities’ unique needs.

According to Paul Durgin, senior technical Sspecialist in Automatics at DORMA, “Its versatility makes it an effective, reliable solution for healthcare facilities, apartment buildings, hotels, retail stores, schools and universities, airports, and more.”

The amount of customization needed could vary vastly from project to project so it wouldn’t be applicable to provide specific programming steps. Included below is a list of the most common programmable options available with the ED900 so you can see the breadth of what it can do.

  • Back Check & Latching Angles
  • Opening Cycle Hold Open Time —0 to 30 seconds
  • After Hours Access Hold Open Time —0 to 30 seconds
  • Day/Night (Push-Pull) — Unlocking during business hours
  • Delayed Unlocking — 0 to 4 seconds; use with electromechanical access control peripherals (such as electric strikes or exit devices with electric latch retraction)
  • Closing Force Prior to Unlocking — Works with the Delayed Unlocking feature and accommodates reduction of latch bolt locking force prior to releasing the electromechanical access control device
  • Latching Action Angle — For engaging the programmable latching action feature: Opening angle range from 2° to 5°
  • Latching Action Force — Power boost during latching cycle to overcome resistance for door seals, locking devices, or door/frame misalignment
  • Keep Closed Force — Designed to keep the door in the closed position when unlocked
  • Wind Load Control — Opening and closing cycles; variables (door size and weight, hinging, alignment, wind loads, HVAC imbalance); forces measured at the door must conform to ANSI 156.1 to maintain ADA compliance.
  • Door Position Status — Monitors when door has reached fully open or fully closed position; can communicate status to external monitoring device or console
  • Synchronized Pair of Doors Integration — Opening of the second door can be delayed by up to 30° of when first door is opened.

 “These options are just the tip of the iceberg when it comes to the ED900’s customization capabilities,” said Durgin. “They demonstrate about 15 of the approximately 50 programmable features offered by the ED900.”

With the extensive customization possibilities, installers needing guidance in programming the ED900 can get assistance by calling DORMA’s technical support team at 1-800-523-8483. For more information, visit the DORMA website at or call 1-800-523-8483.

George Nimee is Product Training Manager, DORMA USA, Inc.