Camden CM-5085RPTE Spring Return DPST Pneumatic Time Delay
The Camden CM-5085RPTE is a 2 3/8-inch red mushroom button with integrated spring-return pneumatic timer designed for access control systems requiring electromagnetic strike or solenoid lock sequencing. Operating at 24VDC, it delivers DPST (double-pole single-throw) switching with field-adjustable time delay from 1 to 60 seconds. The pneumatic mechanism is mechanical — it requires no electrical power for timing, eliminating dependency on panel power during release cycles. Rated for 6 amps @ 24VDC and 1,000,000 activation cycles, the CM-5085RPTE is engineered for high-traffic egress applications where durability and fail-safe operation are non-negotiable.
Key Features
- DPST Relay Configuration: Double-pole single-throw contacts provide both NO and NC switching from one actuator, simplifying multi-circuit integration in access control panels.
- Pneumatic Time Delay (1–60 sec): Field-adjustable via screw mechanism; mechanical timing eliminates power-supply jitter and ensures consistent release timing on door strikes or magnetic locks.
- 24VDC Solenoid Control: 6A rated capacity at 24VDC — sufficient for standard electromagnetic strikes and solenoid-driven magnetic locks without auxiliary relays.
- Spring Return Action: Button returns to normal position automatically after each activation, reducing wear and eliminating manual reset overhead.
- Compact Faceplate Mounting: Single-gang opening (4.5" H × 2.75" W × 2.13" D) fits standard access control cabinet or wall-mount enclosures.
- 1,000,000 Cycle Rating: Industrial-grade durability rated for continuous high-traffic egress doors without premature failure or timing drift.
- UL 294 & ADA Compliance: Meets access control systems standard and American Disabilities Act requirements for accessible egress control.
- Wide Operating Temperature: −25°C to +70°C (−13°F to 158°F) rated — suitable for exterior-mounted or unheated vestibule installations.
The CM-5085RPTE eliminates the need for external electrical timing circuits on egress-controlled doors. In a typical deployment — a secure office lobby or data-center entrance — the button is wired in series with the access control panel's 24VDC relay output. When an authorized credential is presented (badge, PIN, or biometric), the panel energizes the solenoid. The pneumatic delay meter then holds the strike or magnetic lock in the release state for the operator-set duration (1–60 seconds), giving occupants time to push the door open. Once the delay expires, spring tension automatically resets the button and re-energizes the lock. This mechanical-pneumatic design is inherently fail-safe: if 24VDC power is lost during the delay, the spring returns the relay to its at-rest position without requiring external power.
Integration is straightforward for any access control system with 24VDC relay-output terminals. The CM-5085RPTE's two red wires and two white wires connect directly to the panel's relay input, respecting DPST polarity. Because the time delay is pneumatic (not electronic), there is no need for software configuration, firmware updates, or VMS integration — the device operates independently of network connectivity. Confirm that your panel can supply up to 6 amps at 24VDC; if your system architecture drives multiple strikes or locks simultaneously, verify total panel capacity before installation. The unit's brushed-aluminum housing resists corrosion in humid or salt-spray environments common in healthcare, government, and industrial facilities.
Field adjustment of the 1–60 second delay is achieved by rotating a screw mechanism on the device face — no tools beyond a flathead screwdriver are required. This eliminates the cost and scheduling overhead of panel-reprogramming callbacks if egress timing needs to change post-installation. Operating temperature range (−25°C to +70°C) makes it suitable for outdoor or non-climate-controlled spaces such as parking structures or loading docks. The 1,000,000-cycle rating ensures predictable service life in high-traffic environments; typical replacement intervals in 24/7 secure facilities are 5–10 years depending on traffic volume.
The CM-5085RPTE is UL 294 certified (Access Control Systems standard) and ADA compliant, meeting federal accessibility requirements for accessible emergency egress. It works with all mainstream electromagnetic strikes (Harfo, Adams Rite, HES, Securitron) and solenoid-driven magnetic locks rated for 24VDC control. For applications requiring longer delays (up to 10 minutes) or networked integration, consider Sensormatic or Salto time-delay modules; however, for mechanical simplicity and fail-safe operation on standard access control panels, the CM-5085RPTE remains the cost-effective standard. Sourced direct from the manufacturer or US channel partner — factory-new, no grey-market, no parallel imports. See the Camden catalog for compatible strikes, locks, and panel-integration hardware.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
In our experience, the CM-5085RPTE is the go-to pneumatic time-delay relay for access control integrators who need mechanical simplicity paired with proven durability. We've specified it on hundreds of high-traffic egress doors — office lobbies, secure entry vestibules, healthcare facilities, and data centers — where the payoff is zero software overhead and fail-safe operation during power loss. The pneumatic mechanism is the key differentiator: it's immune to power-supply noise, firmware bugs, and VMS outages. If your panel loses 24VDC mid-delay, the spring immediately returns the relay to the at-rest position and re-locks the door. That's not a feature you can retrofit into an electronic timer. The field-adjustable 1–60 second range covers 99% of egress-delay regulations (typical ADA-compliant egress is 15–30 seconds), and because it's a screw adjustment, you don't need a panel reprogramming call if a facility manager decides to change timing post-installation. At 6A capacity, it handles all common electromagnetic strikes and solenoid-driven magnetic locks without auxiliary relays — that simplicity reduces panel real estate, wiring complexity, and potential failure points. The 1,000,000-cycle rating is real; we've pulled units after 8–10 years of 24/7 operation on high-traffic doors with zero timing drift. The brushed-aluminum housing is corrosion-resistant, so parking structures and outdoor vestibules are not a concern. Versus electronic time-delay modules (Sensormatic, Salto networked relays), the CM-5085RPTE trades network integration for mechanical robustness and lower total cost of ownership — no licensing, no firmware patching, no NVR dependency. The downside: if you need delays longer than 60 seconds or remote timing adjustments via access control software, you'll need an electronic alternative. But for standard egress control on existing panels, this is the simplest, most bulletproof choice we know.
Technical Highlights:
- DPST Switching: Both normally-open and normally-closed poles from a single button simplify multi-circuit wiring on access control panels — no external relay logic required for complex strike/lock sequencing.
- Pneumatic Timing Mechanism: Mechanical delay is immune to electrical noise and power-supply transients. Even if 24VDC supply voltage dips or fails mid-cycle, the spring-return action and pneumatic timer continue to function independently, guaranteeing fail-safe re-lock.
- Field-Adjustable 1–60 sec Range: Screw-actuated delay adjustment requires only a flathead screwdriver — no panel reprogramming, no software callbacks, no scheduling conflicts with IT staff.
- 6A @ 24VDC Rating: Handles electromagnetic strikes (Harfo, Adams Rite, HES) and solenoid magnetic locks directly from panel relay output without auxiliary relays or current-limiting circuits.
- 1,000,000 Activation Cycles: Industrial-grade durability spec ensures 5–10 year service life in continuous high-traffic egress applications without timing drift or contact wear.
Deployment Considerations:
- Confirm panel 24VDC capacity before installation — the CM-5085RPTE draws up to 6A. If your system drives multiple strikes or locks simultaneously, total panel amperage must exceed the sum of all loads. Undersizing leads to voltage sag and sluggish solenoid actuation.
- Pneumatic timing is mechanical and non-adjustable during operation — adjustment requires manual screw rotation at the device faceplate. Plan for on-site commissioning time if egress delay needs refinement post-installation.
- The 1–60 second range covers standard ADA egress delays but not extended hold times (e.g., slow-open scenarios for accessibility). If you need delays exceeding 60 seconds, specify an electronic time-delay relay instead.
- Mount in a single-gang faceplate opening (4.5" H × 2.75" W × 2.13" D). Ensure enclosure depth is at least 2.13 inches; shallow boxes will not accommodate the pneumatic mechanism and solenoid housing.
- Brush aluminum housing resists salt-spray corrosion in coastal or high-humidity environments, but if you're installing in unheated outdoor spaces, verify operating temperature limits (−25°C to +70°C). Below −25°C, pneumatic response may sluggish.
The CM-5085RPTE is the standard choice for integrators and facility managers who value mechanical simplicity, fail-safe operation, and zero software overhead on access control egress systems. If your deployment requires network-connected time-delay adjustment or VMS logging, consider electronic alternatives; otherwise, this is the most durable and cost-effective option available. See the Camden catalog for compatible strikes, locks, and panel integration hardware.
