Camden CM-221/46N ValueWave™ Touchless Switch Narrow Jamb
The Camden CM-221/46N is a touchless door activation switch engineered for narrow jamb installations where physical contact elimination is mandated by infection control or accessibility requirements. This IR-based switch triggers electromagnetic lock strikes or door operators from 2–8 inches away, making it the operational standard in healthcare facilities, food-service environments, and high-traffic commercial spaces where hands-free traffic flow reduces cross-contamination and accelerates occupant throughput. The narrow jamb form factor fits standard door frames with constrained horizontal space — typical installations mount in surface boxes where conventional access control readers cannot fit.
Key Features
- IR Sensor with Adjustable Range: 2–8 inch activation distance, field-configurable to match high-traffic or accessibility scenarios. Shorter range minimizes false triggers in crowded corridors; wider range accommodates wheelchair approach angles and ADA compliance.
- 30VDC Electromagnetic Lock Integration: Form C contact output (1A @ 30VDC) directly controls electromagnetic strikes, door operators, and 30V relay coils. No additional power amplification or interface modules required for standard strike hardware.
- IP65 Environmental Rating: Withstands splashing, spray washdown, and humidity without functional degradation. Suitable for restrooms, kitchens, and wet environments; not rated for full submersion or sustained high-pressure washdown.
- Adjustable Time Delay & Toggle Modes: Dwell time configurable 0.5–20 seconds; toggle operation available for alternative activation logic or manual-override scenarios. Allows tuning for specific traffic patterns and door-closer specifications.
- 10 Millisecond Response Time: Meets ADA-compliant activation speed for automatic door operators and accessible entry sequences without perceptible delay.
- Narrow Jamb Mounting: Surface-mounted in compatible narrow enclosure (CM-23D box). Fits installations where single-gang or double-gang electrical boxes conflict with frame depth or glass sidelite geometry.
- Wide Operating Temperature Range: −13°F to 122°F, supporting climate-controlled indoor spaces and unheated/uncooled entry vestibules across North American climate zones.
- Low Power Consumption: Peak draw 45 mA @ 12–24 VDC. Compatible with standard filtered, regulated power supplies; does not require dedicated UPS or backup power (though battery backup is recommended for security-critical facilities).
The CM-221/46N operates as a standalone activation device without requiring networked access control systems, TCP/IP readers, or credential management platforms. It integrates into any access control workflow that accepts a Form C contact relay — pair it with proximity readers, card swipe panels, or biometric devices upstream of the switch's power supply for multi-credential scenarios. The switch itself is agnostic to authentication method; it simply triggers the door hardware when an approaching occupant breaks the IR beam.
Deployment is straightforward in retrofit applications: mount the sensor head in the narrow jamb box, route the 30VDC control pair to the lock strike or door operator, and commission the range and dwell time via field-accessible potentiometers. No software configuration, firmware updates, or VMS integration overhead — physical installation and electrical termination complete the setup. This simplicity makes it ideal for integrators managing mixed-technology estates or facilities where IT infrastructure cannot accommodate network-dependent entry devices.
In high-traffic facilities (emergency departments, cafeterias, manufacturing floors), the adjustable 2–8 inch range prevents nuisance holds caused by foot traffic near the door frame. Tighter range settings reduce false opens in vestibules where occupants cluster; wider settings accommodate slow-moving occupants and wheelchair users without requiring repeated approach. Dwell-time tuning ensures the door remains unlocked long enough for the slowest authorized occupant to pass through, typically 3–5 seconds for standard passage and 10–15 seconds for wheelchair users navigating to a secondary door.
The CM-221/46N carries a Manufacturer Warranty and complies with applicable electrical codes (NEC 110.2 for DC power systems, ADA 2010 Standards for accessible entry). Verify your door frame geometry, lock strike voltage rating, and power supply capacity before ordering. If your installation requires networked access control, credential logging, or multi-door scheduling, specify a full TCP/IP reader system instead; the ValueWave switch is best suited to analog, single-door, high-simplicity deployments.
Eden PhillipsPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the CM-221/46N across dozens of healthcare facilities, food courts, and high-touch commercial spaces, and it remains one of the most reliable hands-free activation switches on the market — precisely because it does one thing extremely well and doesn't try to be a networked access control reader. The IR sensor is genuinely stable in stable indoor lighting (fluorescent, LED); it does struggle in direct sunlight or highly variable ambient IR (loading docks with open bay doors), but those are edge cases easily mitigated by mounting position. The narrow jamb form factor is a genuine advantage in retrofit applications where frame depth or glass sidelites rule out standard surface-mount readers. The real differentiator is the 30VDC Form C contact — it drops directly into electromagnetic lock circuits without intermediate relays or power supplies, which simplifies wiring and reduces points of failure in a single-door installation. On a 50-door hospital floor, that cumulative simplicity translates to lower commissioning labor and fewer callbacks for nuisance alarms. The trade-off is obvious: no credential logging, no audit trail, no integration with VMS or access control platforms. If you need to know who entered which door at what time, this isn't your product. If you need hands-free traffic flow with 99.5% reliability and zero network overhead, it's your workhorse.
Technical Highlights:
- IR Sensor @ 2–8 inch Range: The adjustable window is operationally critical. We've seen integrators set range too wide (10–12 inches) in vestibules and trigger on adjacent occupants; set it to 4–6 inches indoors, and false-open rates drop to near zero. Field potentiometer tuning means no return trip to site if the initial estimate was off.
- 30VDC Direct Strike Control: Standard electromagnetic strikes and 24/30V door operators accept the Form C closure directly. No intermediate power amplification means one fewer device in the circuit, lower capex, and one fewer failure point. Verify your strike is 24/30V rated; 110/240V strikes require external relay modules.
- IP65 Rating with Narrow Mounting Geometry: The sealed sensor head withstands restroom humidity and splash without seal degradation. Narrow jamb mounting keeps the sensor away from the threshold, where standing water and mud splash are highest — a real advantage over surface-mount readers mounted on the door frame itself.
- 45 mA Peak Draw @ 12–24 VDC: Ultra-low current draw simplifies power supply selection and allows parallel wiring to multiple switches from a single 24V regulated supply. We've run as many as eight CM-221/46N units on a single 1A PSU without nuisance voltage sag.
- 0.5–20 Second Adjustable Dwell: Critical tuning parameter. Elderly occupants and wheelchair users need 8–12 seconds minimum; fast-moving staff in kitchens can operate at 2–3 seconds. Potentiometer adjustment on site means you get this right without firmware pushes or controller reboots.
Deployment Considerations:
- Direct sunlight or high ambient IR can cause intermittent false opens on south-facing or west-facing exterior vestibules. Mounting position matters — shade the sensor head or recess it slightly into the jamb pocket to minimize ambient IR noise.
- The switch triggers on any IR-emitting object approaching the beam — hands, faces, clothing, shopping carts, equipment carts. In high-traffic environments (food courts, emergency departments), you will get some proportion of unintended opens. Set dwell time to 2–3 seconds to minimize the window for unauthorized passage.
- Electromagnetic lock strikes require 30VDC regulated supply; unregulated or peak-voltage supplies over 24V will void warranty and can damage the strike coil. Verify your power supply is filtered and regulated to 24 ±10% before commissioning.
- Narrow jamb box compatibility is specific — verify the mounting frame depth and width against your door geometry before ordering. Standard shallow electrical boxes won't work; use Camden CM-23D or equivalent narrow-profile surface enclosure.
- No network connectivity means no remote monitoring, no integration with door-schedule systems, and no credential audit trail. This is a pure analog device — if your project requires these features, specify a networked reader instead.
The CM-221/46N is the right choice for single-door, high-simplicity installations in healthcare, food service, and hospitality where hands-free traffic flow and operational reliability matter more than networked credential logging. It's also ideal for integrators managing aging access control systems where network infrastructure is minimal or unavailable. For complex multi-building campuses with credential management and audit requirements, look at full networked reader systems. For a locked restroom door, an emergency-room passage, or a high-touch serving line, the ValueWave switch will outperform every networked alternative by sheer virtue of its simplicity. Explore more solutions in the Camden catalog.
