SDC Quiet Duo™ Electric Latch Retraction for Exit Devices

Slide the LR100VDK onto the case. Connect the supplied LR100 linkage onto the device’s latch retraction rod and the latch retraction clevis. Be sure to remove any slack in the linkage before tightening the two setscrews using a 5/64” hex wrench.

At this time, make the electrical connections in order to test the operation before reassembling. Use wire connectors (beans) to ensure a good connection. Finish assembling the exit device components. Test the manual operation of the exit device.

Test the electrical operation. The stepper motor should retract the pushpad and the Pullman latch. When power is removed, the pushpad and latch will extend.

Once the stepper motor completes its operation of retracting the pushpad and Pullman latch, an electromagnet keeps the latch and pushpad retracted. Once the exit device is in the passage mode, it will remain in that mode until power is withdrawn.

SDC Electric Latch Retraction Kits are compatible with:

• Adams Rite 8800 & 8100 Series
• Corbin ED5200 & ED5800 Series
• Dor-O-Matic 1590 & 1490 Series
• Hager 4500 Series
• K2 QED300 Series
• SDC Spectra® S6000 Series
• Von Duprin 98/99, XP98/XP99, 33/35 and 22 Series
• Yale 7100 & 7110
• Precision Hardware (PHI) Apex 2000 Series

Components needed for this installation include:

• SDC Quiet Duo™, Part #LR100VDK
• SDC One Amp Power Supply, Part #602RF
• SDC Power Transfer Hinge four-wire, Part # PTH-4
• SDC Seven Day, Skip-A-Day Timer 24VAC/DC, Part # 14-2
• Two SDC 12 Volt 4Amp Rechargeable Batteries, Part # RB12V4
• 18 Gauge 2 lead stranded wire

The Quiet Duo provides retrofit electric latch retraction and dogging for rim mount and vertical rod Von Duprin exit devices. A maximum inrush of 450mA @24VDC powers the stepper motor, retracting the latch mechanism and the pushpad into the depressed position. Once retracted, a magnet is energized to keep the exit device in dogged (passage mode). A constant 180mA @ 24VDC is required to keep the latch mechanism retracted, enabling push and pull operation of the door. This kit is UL Approved.

The UL Class 2, 602RF Access Control Power Supply and Charger has field-selectable 12 or 24VDC of filtered and regulated power contained within a 12” x 12” x 4” cabinet. Auto resetting output circuit protection and an isolated 13.5/27 VDC battery charger are built in. Optional features for this power supply included the six-foot power cord, rechargeable batteries and a Seven Day, Skip-A-Day Programmable Timer.

The PTH-4 four wire power transfer hinge (PTH) is a 4.5” x 4.5” standard weight, steel hinge. This UL 10B Listed hinge is designed for fire door applications and has a five foot cable. The four-wire, 28-gauge power transfer hinge can be used with loads up to one Amp.

The Seven Day Timer is a compact, field programmable, timer module designed for automatic timed locking and unlocking of one door or more doors on the same circuit. Programming each day individually permits skipping unlocking on selected days.

The power supply was installed onto the wall directly above the door using the optional six-foot power cord to be plugged into an existing duplex outlet. The timer was installed in the power supply cabinet.

A power transfer hinge was installed in the center position providing electrical power from the jamb into the hollow metal door. Holes were drilled through the center hinge position and the mounting plate to run the positive and negative wires.

Because of the LR100’s low power requirements, 18 gauge two lead stranded wire was used from the power supply to the power transfer hinge. The four-wire power transfer hinge comes with a five-foot cable, more than sufficient to wire the electric latch retraction.

SDC has received a UL Listing for installing the Quiet Duo retrofit kits onto fire rated exit devices.

The SDC Quiet Duo LR100 Series can be field installed on non fire-rated exit/panic devices. For more information, contact your local locksmith distributor or SDC, 800-413-8783. Web Site: www.sdcsecurity.com. An installation video is online at www.sdcsecurity.com/whatsnew2.aspx#lr100.

To read additional Locksmith Ledger articles about SDC products, visit http://tinyurl.com/sdc0611.