Camden CX-91S Series Single Door Magnetic Locks

The CX-91 Series magnetic locks are fail-safe, so the door releases the moment power is removed. That is inherent to how a maglock works and it is what most egress codes want on an access-controlled door, but it also means anyone who kills power to the lock opens the opening. If the door needs to stay secured through a power loss, a maglock is the wrong device and you want a fail-secure electric strike or electrified lockset instead.

No. The CX-91 Series carries no fire rating, so it should not be applied to a labeled fire door assembly. Fire doors need to positively latch, and a magnetic lock provides no latching at all. For a labeled opening, use a fire rated latching device with an electrified trim or an electric strike listed for fire door use.

Yes. The CX-91 is compatible with all access and egress systems. It is a straight DC load switched by a dry contact, so any card reader, keypad, panel, request to exit device, or push button that can break the power feed will operate it. There is no proprietary protocol to match.

On the CX-91 Series the TLS option builds in an adjustable timer, a lock sensor, a relay and an LED; the TDS option adds a door status switch. Order the version with those built in if your access control needs to know whether the door actually re-locked, if you want a relock delay after a card read, or if you need a contact to report door position back to the panel or an alarm. If the panel already handles timing and you do not monitor lock or door status, the base version without them is all you need. Both 600 and 1200 lb versions are offered with or without the option.

The CX-91 Series comes in both surface and mortise mount models, and Camden offers a range of mounting brackets and spacers for it. Surface mount goes on the frame header with the armature on the door and is the standard inswing installation; the bracket range covers outswing doors, glass doors, and headers where the lock body needs to be packed out or dropped down. Mortise models recess into the header where a surface box would not be acceptable visually. Brackets and spacers are separate items, so work out the door swing and frame condition before you order.

Yes, and it is the part people leave off the order. Because the CX-91 is fail-safe and holds by magnet alone, there is no mechanical way to open the door from the inside; something has to cut power for egress. That means a request to exit motion sensor, an exit push button, or an exit device with a built in switch on the secure side, plus whatever emergency release your local authority requires. Budget those into the job alongside the lock, the power supply, and the mounting bracket.

Two finishes are offered on the CX-91 Series, aluminum and black, and both are available in 600 lb and 1200 lb holding force and with or without the built in timer, sensor and relay package. Black is the usual pick on dark anodized aluminum storefront and glass front entries; aluminum matches clear anodized frames.

The CX-91 Series is built for commercial use with weather and vandal resistant construction, so exterior entrances are within its intent. The body is aluminum. For an outdoor opening the 1200 lb version is the safer specification, since exterior doors see wind load and harder pulls than interior ones.

The CX-91 is a direct hold magnetic lock: a surface or mortise mounted electromagnet in the header pulls against an armature on the door face, at 600 or 1200 lbs of holding force. A shear lock, such as the ROFU Mini Shear Lock Series, instead engages into the top of the door and resists sideways rather than by pull off, which lets it be concealed and keeps the header clear. Go with the CX-91 where a visible surface unit is acceptable and you want straightforward installation and high holding force; look at a shear type where the hardware must be hidden or the door and frame will not accept a face mounted armature. The ROFU 21037 is a U-bracket pair for that shear family, not a maglock itself.

No. The ROFU 21037 is a pair of U-brackets for use with the 21036, for model 8035/-002 in the Mini Shear Lock Series, so it is mounting hardware for a shear lock rather than a lock itself. The Camden CX-91 is a surface or mortise mount electromagnetic lock with field selectable 12/24 VDC operation. A shear lock sets into the door and frame and holds by an interlocking pin, while the CX-91 holds by an armature plate drawn to the magnet face, so the two are prepped and installed differently and the ROFU brackets do not carry a CX-91.