Camden CM-2060 Key Switch SPDT Maintained Contact
The Camden CM-2060 is a key-operated SPDT (Single Pole Double Throw) switch designed for manual override and emergency access control in commercial door systems. Operating at 30VDC with maintained contact design, it holds electrical signal output stable as long as the key remains engaged — critical for fail-safe strike activation, latch control, or emergency egress functions that require positive human confirmation. The dual independent relay outputs allow simultaneous control of two separate circuits, making it ideal for scenarios where a single key action must trigger both strike release and alarm zone shunt, or strike and door position verification. This is the hardware equivalent of a physical checkpoint: integrators deploy it when protocol mandates that no electronic reader alone can open a door without a keyed manual checkpoint at the frame.
Key Features
- SPDT Maintained Contact Design: Output remains active while key is turned and held. No momentary pulse — the relay stays energized for stable, predictable control of door strikes or latches.
- Dual Independent Relays: Two separate relay outputs enable one key action to control two circuits simultaneously (e.g., strike + alarm bypass, or strike + sensor gate).
- 30VDC Operation: Integrates directly with standard access control power supplies and door control modules without external conversion.
- HID Compatible Mortise Cylinder: Accepts 1", 1 1/8", or 1 1/4" mortise cylinders (sold separately). HID keying compatibility allows integration with existing master key systems.
- Flush Aluminum Housing: Cast aluminum construction, 1/4" thick, tamper and vandal-resistant. Two models: CM-1100 (2 3/4" wide, single-gang) and CM-2000 (1 3/4" wide, narrow door frames).
- All-Weather Rated: Suitable for indoor and outdoor installations. Includes tamperproof fasteners and brass cylinder lock ring for secure mounting.
Manual override key switches address a critical operational gap: electronic readers fail gracefully, but they can be bypassed, spoofed, or locked down during system outages. A keyed maintained-contact switch at the frame enforces a two-factor requirement — both credential reader authorization AND physical key turn — or provides a fallback when card systems go offline. The CM-2060 is not a replacement for electronic locks; it is a companion control that sits upstream or downstream of an RFID/card reader in the access logic chain.
The dual relay architecture is the real differentiator. Unlike a simple key switch that toggles one function, the CM-2060 lets you wire one relay to the electric strike and the second to a door position switch input, an alarm input, or an adjacent gate. This eliminates the need for a second key switch or a relay bank downstream. In retrofit scenarios where door frame space is tight and conduit routing is congested, that consolidation saves labor and reduces wiring complexity.
Integration is straightforward: 30VDC wiring connects to your access control panel or standalone power supply. Confirm relay load ratings (typically 2A per relay) against your strike or latch current draw before termination. If your strike draws more than 2A, you will need an intermediate relay or contactor — do not overload the CM-2060 contacts. The maintained contact design means the key must be physically present and held in the ON position for output to remain active; removing the key deactivates both relays instantly. This is a feature for security-conscious deployments (emergency personnel can verify that only an authorized keyholder is opening a door) and a requirement for others (some life-safety codes mandate positive key control on emergency exits).
The Camden CM-2060 is most commonly deployed in: emergency egress doors that require manual key override when electronic systems are offline, high-security areas where protocol mandates human checkpoint alongside badge readers, equipment rooms or server closets with dual-function locking (strike + position sensor validation), and retrofit projects where existing door frames cannot accommodate standard electronic locks. It is not suitable for high-traffic public entrances or scenarios requiring momentary pulse output — if you need a key switch that releases the strike on key turn and then re-locks automatically, this is the wrong product. Pair it with a 30VDC access control supply (such as a standalone 2A or 4A cabinet module or integrated output from a dedicated access panel) and confirm relay contact ratings before installation.
Eden PhillipsPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We have installed dozens of Camden key switches in commercial access systems, and the CM-2060 fills a specific but non-negotiable niche: emergency or fail-safe override for doors that cannot rely on electronic readers alone. The maintained contact design is the critical operational detail — unlike a momentary push button, the key switch output stays energized the entire time the key is turned. This matters enormously in fail-safe strike installations, where you cannot afford a brief drop-out, and in compliance environments where inspectors want to see a physical keyholder in control of the door opening. We have also seen it used as a secondary control in high-security suites where protocol requires two independent unlock gestures: badge reader on the outside, key switch override on the inside. The dual relay outputs are genuinely useful — on a retrofit we did at a law library, one relay fed the strike, the second fed a door position sensor input on the access panel, so the system could verify that the door was actually opening before logging the event. That second relay would have required a separate relay module or been cumbersome to wire otherwise.
Technical Highlights:
- Maintained Contact (not momentary): Output remains energized while key is in the ON position. Contrast this with momentary switches or push buttons — here, the relay does not drop out when you release pressure. This is essential for fail-safe strike control; a split-second loss of current can cause a strike to reset, defeating the override intent. If you need momentary output (key turn triggers a pulse, then releases), this is the wrong switch.
- Dual Independent SPDT Relays: Two separate relay outputs on one key switch. Each relay rated for typical access control loads (up to ~2A per relay at 30VDC). Allows one key action to arm two functions — strike + position verification, or strike + alarm shunt — without additional external logic or relay modules.
- 30VDC Direct Integration: Works with any standard 30VDC access control cabinet supply or panel output. No external power conversion or conditioning required. Check your panel's relay output capacity; if you are daisy-chaining multiple key switches or high-load strikes, confirm the power supply can handle cumulative current draw.
- HID Mortise Cylinder Compatibility: Accepts standard HID-keyed mortise cylinders in 1", 1 1/8", or 1 1/4" lengths. Allows integration with existing HID master key systems in buildings where that is already the standard. Cylinders are sold separately; factor into your procurement and master key integration timeline.
- Tamper-Resistant Construction: Cast aluminum housing (1/4" thick), tamperproof screws with dedicated driver, brass lock ring. Not indestructible, but resistant to casual pry-bar attacks and weathering. Suitable for outdoor vestibules and all-weather applications where cheaper plastic switches would fail within a year.
- Compact Mounting Options: Two widths — CM-1100 (2 3/4") for standard single-gang openings, CM-2000 (1 3/4") for narrow door frames. If your retrofit doorframe is tight, the CM-2000 fits where a standard electronic lock would require frame modification.
Deployment Considerations:
- Relay load rating is ~2A per relay at 30VDC. If your strike draws 3A or more, the CM-2060 contacts will arc and fail prematurely. Size an intermediate relay (Axiom, Altronix, etc.) to handle the load, and use the CM-2060 outputs to trigger that relay. Do not force-feed an oversized strike through these relays.
- Maintained contact means the key must physically remain in the ON position for output to stay active. If the security protocol requires an officer to hold the key, that is a feature. If you expect the door to open when the key is turned and then auto-relock, you need a momentary switch or electronic lock, not this product.
- The cylinder is not included; order compatible 1", 1 1/8", or 1 1/4" HID mortise cylinders separately. Allow lead time for master key matching and keying if you are integrating with an existing building master key system. Standard cylinder stocks from distributors work, but coordinate with your master key file early.
- Wiring is straightforward (power, relay outputs to strike/function, ground), but confirm your access control panel supports 30VDC output and relay-style signaling. If your panel uses dry-contact inputs only, this switch works fine. If your panel expects voltage-sensing inputs, consult the panel documentation to ensure compatibility.
- Mounting: use the included tamperproof screws and torque appropriately. Aluminum is softer than steel; over-torquing can strip threads. The housing should sit flush in the door frame; do not force-fit or shim excessively, as this can bind the cylinder and make the key stick.
The CM-2060 is the right choice for integrators and end-users who prioritize manual override assurance in fail-safe or high-security access configurations. It is not a general-use lock; it is a control point for doors that cannot afford to rely on electronic readers alone. If your project calls for emergency egress backup, multi-factor unlock (badge + key), or dual-relay simultaneous control, this is the right product. For standard commercial doors with electronic readers as primary control, a smart electric lock is more practical. Explore the full Camden catalog for complementary strike, latch, and wiring accessories.
