Electrifying Exit Devices With the Command Access Electrified Latch Pullback

Kits provide a cost-effective way to convert a mechanical exit device to an electrified exit device by simply replacing the mechanical baseplate with the provided Command Access modified EL baseplate. This eliminates the need to ship your device for...


The Command Access motor has onboard self-diagnostics covering over voltage, under voltage or component malfunction. A motor driven latch pullback equipped exit device can be located up to 700 feet from the power supply using 18/2 wire. The maximum wire run is 1000 feet using 12/2 wire.

Important: Command Access motors are designed such that if power is lost when the latch mechanism is in the pulled back position, the spring pressure on the exit device pad will unwind the motor mechanism and the latch mechanism will extend.

The motor driven latch pullback mechanism incorporates a threaded shaft that retracts the pushbar and reverses rotation to extend it. A special threaded nut rotates as the motor turns, retracting or extending the linkage rod/bracket that is connected to the pushpad assembly. Using this design, the motorized mechanism unscrews when power is removed. The actual travel is approximately ¾ inches.

The motor technology has improved in speed and power to a point where the exit device latch mechanisms can achieve full retraction within ½ second. The Command Access motor driven latch pullback mechanisms can overcome stack pressure of up to 60 lbs pre-load on a rim exit device.

Command Access offers both solenoid-activated and motor driven latch pullback operation. Ten motor driven kits and nine solenoid activated kits are available. Latch pullback kits can be installed onto rim, mortise, surface or concealed vertical rod exit devices. Command Access has UL Listings for eight exit device latch retraction kits. Some of these kits require factory certification to be installed by locksmiths.

Solenoid activated and motor driven latch pullback kits are available for Von Duprin 33,35, 98 and 99 exit devices. Kits that have the solenoid or motor pre-installed on the baseplate are not UL Listed for Fire rated exit devices. These kits replace the dogging mechanism. Non-UL Listed exit devices comply with the NFPA 101 life safety code.

The solenoid-activated Von Duprin kits have a current draw of 12A@24VDC for 200ms to retract the latchbolt, then the current is electronically reduced to 250mA@24VDC to hold the latchbolt in a retracted (dogged) state as long as is desired. When powered, the pushpad and the latch mechanisms retract. When power is removed, the pushpad and the latch mechanisms extend, locking the door.

Seven Command Access Motor Kits for exit devices are UL Listed and can be installed into UL Listed fire rated exit devices. UL Listed fire rated exit devices comply with both the NFPA 101 Life Safety Code and NFPA 80 fire doors and windows. A benefit of the UL Listed kits for Fire rated exit devices is latch pullback provides electronic dogging.

Four of the seven UL Listed Kits can be field installed. They are the:

  • CRLP98-UL-M-KIT for specific Cal-Royal exit devices
  • CYLP-UL-M-KIT for specific Corbin Russwin and Yale exit devices
  • SLP-UL-M-KIT for specific Sargent exit devices
  • VLP-UL-M-KIT for specific Von Duprin exit devices

The SLP-UL-M-KIT for the Sargent 80 Series exit devices has a voltage range of 22 to 30VDC. System protection shuts down the unit when voltage exceeds 30VDC. The current draw is 1A for 400ms, sufficient to retract the latch mechanism, then 125mA to maintain the electronic dogging.

For this article, we will install two Command Access UL Listed motor driven kits; the VLP-UL-M-KIT for Von Duprin 33, 35, 98 and 99 panic devices and the CYLP-UL-M-KIT for Corbin Russwin ED4000 and ED5000, and Yale 7000 Series exit devices. For this article, modifications are being made to rim exit devices.

 

Corbin Russwin-Yale Installation

The UL Listed Corbin Russwin and Yale kit, CYLP-UL-M-KIT, is a straightforward installation. There is no modification to the exit device. Important: Always install the motor driven kit with the exit device off the door.

Step 1. Remove the exit device from the door.

Step 2. Remove the end cover from the bottom rail.

Step 3. Attach the motor linkage assembly to the pushpad retraction mechanism.

Step 4. Screw the aluminum link in place using the provided setscrew and hex wrench.

Step 5. Slide the motor assembly into place directly behind the motor linkage assembly.

Step 6. Rotate the nut assembly onto the Acme threaded shaft until the motor assembly mounting holes line up with the dogging mechanism holes in the bottom rail.

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