Camden Wired Touchless Switch, w/ built-in door control, 2 Relays, ...

We've installed the CM-332 across dozens of retrofit access control projects, and it solves a real integration friction point: redundant wiring and control modules in tight electrical enclosures. In a typical vestibule retrofit—say, an office entry with a mag lock and an emergency exit push-bar—you'd otherwise run separate power and relay lines to a standalone motion detector and a relay module, consuming two knockouts and two control circuits from a cramped panel. The CM-332 consolidates that into one wall-mounted unit with integrated relay logic, shrinking panel complexity and labor cost on-site. The field-selectable fail-safe/fail-secure relay behavior is a major asset; we've seen integrators deploy the same hardware across life-safety lobbies (fail-safe for emergency egress) and secure data centers (fail-secure for breach prevention) with a single-switch configuration change, no hardware swap.

Technical Highlights:

• Dual Form C (SPDT) Relays at 3A @ 30VDC: Each relay independently switches 30V strike/latch/solenoid circuits. Rated for 100,000+ mechanical cycles—standard duty-cycle longevity. Unlike single-pole relays, Form C gives you changeover capability: energize a strike on one contact set, trigger an alarm or audit log output on the other set. Selectable fail-safe or fail-secure behavior per door means no external latching logic needed for multi-door systems.
• 12–24 VAC/DC Operation at 40mA Nominal: Draws <13W @ 24V—negligible load on a standard access control panel power supply or dedicated 24V UPS-backed rail. No external transformer, no ground-isolation issues. Operates across the full ±10% voltage window, accommodating older 12V systems and modern 24V infrastructure without compromise.
• Adjustable IR Sensing with Three Presets: Standard (1″–28″) for typical touchless applications; auto-operation (6″–40″) for approach detection; hand-wave (6″–72″) for accessibility. Dual IR sensors reduce blind spots and false-negatives in corners or off-axis approach angles. No calibration required during install—switch the preset and move on.
• REX & Door Contact Integration: Direct inputs for Request to Exit button and magnetic door position sensors (8mA maximum load). Relay outputs can be tied to strike activation independent of REX input, so a door-forced-open sensor can trigger an alarm relay while a REX button independently controls the strike. Eliminates external logic modules for multi-input scenarios.
• Field-Selectable Relay Modes (Momentary, Maintained, Toggle, Alarm): Momentary energizes the relay for a set duration—standard for mag locks and electric strikes. Maintained (latching) holds the relay state until explicitly reset—useful for solenoid-operated gates or interlock doors. Toggle switches relay state on successive activations. Alarm mode logs or triggers an external circuit on detection without energizing the primary strike. All configurable via internal DIP switches; no commissioning tool required.
• Flexible Mount (Wall, Pendant, Recessed): Standard single-gang or double-gang electrical box compatibility. Black polycarbonate faceplate supplied; stainless steel upgrade available for corrosive environments or high-traffic areas prone to vandalism or fingerprints.

Deployment Considerations:

• Wired Power Required at Mount Point: The CM-332 must be powered by 12–24 VAC/DC from an access control panel or dedicated power supply. If you're retrofitting a building without conduit runs to the switch location, budgeting for in-wall or surface-mounted power conditioning may extend labor. Verify panel power availability and current budget before installation.
• IR Detection Sensitivity in High Ambient Light: Dual IR sensors perform reliably in normal indoor and outdoor daylight, but direct sunlight on the lens or extremely bright ambient sources (high-intensity stadium lighting, welding arc flash) can occasionally reduce detection range or create false-triggers. Test detection range in situ during commissioning; mount the unit to minimize direct sunlight exposure if operating outdoors (use a hood or recessed pocket if possible).
• Relay Contact Rating at 30VDC Only: The 3A contact rating applies at 30VDC. If your strike/latch circuit operates at a different voltage, verify that your power supply feeds the relay contacts at or below 30VDC. Exceeding 30V or sourcing >3A will degrade contact life or cause failure. Use an external solid-state relay or contactor if you need higher current.
• REX Input Load Limitation (8mA Max): Door contact sensors and REX buttons must draw ≤8mA from the CM-332's input. Low-impedance sensors (passive mag switches) typically measure 1–2mA and work fine; powered sensors (active door position switches with onboard logic) may exceed the limit. Confirm sensor spec before wiring to avoid input circuit damage.
• Optional Wireless Transmitter Does Not Replace Wired Sensing: If you add the wireless transmitter module for remote triggering, the core unit remains wired for power and relay outputs. The wireless module augments the system; it does not eliminate the need for 12–24V conduit to the switch location. Plan accordingly if wireless-only operation is a future requirement.

The CM-332 is the right choice for integrators retrofitting existing access control systems with touchless entry capability, especially where panel space is constrained and multi-door coordination is needed. It is also ideal for new vestibule and secure entry installations where fail-safe/fail-secure compliance is non-negotiable and field reconfiguration must happen on-site without factory reordering. For straightforward single-door applications or deployments requiring cloud-connected motion analytics, a standalone wireless motion detector paired with a discrete relay module may be simpler. But if you need hardwired control, multi-door expansion, and quick field commissioning—no software, no wireless credentials—the CM-332 earns its place. See the Camden catalog for additional access control components and wired touchless options.