Dorma EML310 Electromagnetic Lock, Single Door, 1500 lb., Bond Alert, Door Position Sensor

It releases. The EML310 is a fail safe device, electrically locked, so the magnet only holds while it is energized. Cut power and the door is free to open. That is the normal arrangement for an egress door on an access control system, and it is what most fire and life safety authorities expect on a required exit. If you need a door that stays secure through a power loss, a mag lock of any brand is the wrong device type entirely, you want a mechanical lock or a fail secure electric strike instead.

Two different things, and integrators mix them up. The door position sensor reports whether the door leaf is closed or standing open. Bond alert reports whether the magnet has actually achieved full bond against the armature, which is the condition that matters when a door closes but does not seat, or when the armature is out of alignment. A door can read closed and still not be locked. Wiring both back to the panel gives you a genuine secure or not secure state rather than an assumption. If your head end only has one monitor input, take the bond signal, it is the one that tells you the opening is held.

No handing to specify, the EML310 is non handed and one part number covers left and right openings. That matters when you are buying for a whole property, you stock one lock rather than two. Mounting orientation is a different question from handing though, a surface mag of this type mounts on the frame header with the armature on the door, so the door has to pull toward the magnet. For an opening that swings the other way you are into a bracket, or a different device such as the DynaLock 2050 Series, which is listed for outswing or inswing on single or double doors.

No. The EML310 is built for single doors, one magnet and one armature on one leaf. A pair needs a double magnet unit, one magnet per leaf, so both leaves are held. The Alarm Controls 1200D Series and the DynaLock 2250 Series are double door magnetic locks. Buying a single and trying to cover a pair leaves the second leaf unsecured, and the door position monitoring only ever sees the leaf you put the sensor on.

Yes, the EML310 carries a fire rating. Because it is fail safe it drops open on power loss, which is the behavior a fire alarm interface relies on, the alarm relay kills the lock power and the opening frees. Wire the release to the fire alarm system, not just to the access panel, so a general alarm drops the magnet whether or not the access system is healthy.

The EML310 is built for single doors. For a pair, the DynaLock 2250 Series is a double electromagnetic lock rated 1200 lb, surface mounted for outswing or inswing single or double doors, and the Alarm Controls 1200D Series is a double magnetic lock. Both cover an opening with two leaves in one assembly rather than requiring two single units.

The EML310 is a commercial single-door electromagnetic lock on 12/24 VDC. For an opening exposed to the elements, the Locknetics WMG Series is a weatherproof electromagnetic lock offered in 600 lb and 1200 lb models on 12/24 VDC, the Alarm Controls 1200WP Series is a weather resistant magnetic lock, and the Dortronics 1000 Series is an industrial mag lock with sealed electronics and weather resistant construction, 12/24 VDC field selectable, with an SPDT door position switch. That Dortronics door position switch is the counterpart to the door position sensor on the EML310 build.

They solve a different mounting problem. The EML310 is a surface style single door electromagnetic lock at 1500 lb. The ROFU 8031-002 is a shear lock rated 2200 lb holding force, 12/24VDC, monitored, and the Schlage Electronics 320M is a compact mortise sliding door electromagnetic lock at 1500 lbs, heavy duty. A shear lock or a mortise unit is concealed into the frame and door rather than mounted to the face of the header, so swapping one in for the other means different door prep, not a drop-in exchange. The ROFU 8512 takes a third approach with a selectable keyhole mount at 1200 lb, 12/24VDC.

The EML310 is an electrically locked fail safe magnetic lock for single doors with bond alert and a door position sensor; those are monitoring outputs, not an egress timer. Where the code official is calling for delayed egress, the Alarm Controls 1200DE Series is a delayed egress magnetic lock for single doors, and the DynaLock 2101 Series is a 1200 lb early warning lock. Both build the egress sequence into the lock itself.

Not the one to reach for. The EML310 is a standard interior surface mag, nothing in its spec covers weather exposure. For an exterior opening look at a sealed or weather resistant unit, the Alarm Controls 1200WP Series, the Locknetics WMG Series, or the Dortronics 1000 Series with sealed electronics. Putting a standard mag outdoors gets you corrosion at the armature face and intermittent bond, which then shows up as nuisance alarms on your monitor input.

The Schlage Electronics M390RFK is the closest match on paper, 1500 lbs holding force, heavy duty, with a door status monitor and a magnetic bond sensor, which is the same pair of monitoring outputs the EML310 BA DP carries. It is also a direct retrofit for the Locknetics 390+ if that is what is in the frame. For a concealed sliding door application at the same force, the Schlage 320M is a compact mortise unit at 1500 lbs. Mounting patterns differ between brands, so a swap is a new frame layout rather than a drop in unless the document says otherwise.

A mag lock has no mechanical release of its own, so the EML310 always needs something upstream to cut its power for egress, a request to exit sensor, a push button, or an exit device with a switch, plus the fire alarm interface. The lock itself contributes the monitoring, bond alert and door position back to the panel, but it will not let anyone out on its own. Budget the release hardware and the power supply into the job alongside the lock.

The EML310 is rated 1500 lb holding force. Where an interior opening does not call for that, the Schlage M420 is a single door electromagnetic lock rated 500 lbs, and the Dortronics 1107 is a narrow 2 inch slim line single door mag lock rated 600 lbs. The Locknetics MG Series is offered in 600 lb and 1200 lb models, standard or monitored, on 12/24 VDC, which matches the EML310 voltage range if the rest of the system is already wired for it.

Commercial. The EML310 is a commercial door hardware device at 1500 lb holding force with monitoring built in, which is the specification level for offices, schools, healthcare corridors and multi family common doors rather than a house. Property managers replacing a mag on a lobby or amenity door are in the right family here.