HES SC616CP Audible Alert Chime Module
The HES SC616CP is an audible alert chime module designed for integration with HES access control systems, delivering real-time audio notification at secured entry points. This auxiliary-output-driven device signals door unlock events, access denials, and system alarms, eliminating silent failures and providing immediate feedback to occupants and security staff. The SC616CP bridges the gap between visual lock status and actionable audio cues — essential in high-traffic or multi-door environments where visual monitoring alone creates operational blind spots.
Key Features
- Auxiliary Output Integration: Connects directly to HES control module auxiliary output circuits. No separate power supply or wiring harness required beyond standard access control cabling.
- Medium Sound Output: Rated for commercial and institutional entry points. Sufficient audible range for office lobbies, secure corridors, and reception areas without nuisance-level loudness in adjacent spaces.
- Wide Operating Temperature: Operates -30° to +65°C, storage to -40° to +85°C. Suitable for climate-controlled interiors and unheated vestibules; exceeds typical commercial building HVAC envelope.
- NEMA Enclosure Rating: NEMA 3R, 4X, and 12 compliant (with use of optional ACC03 enclosure). Withstands rain, dust, and corrosive environments; deployable in loading docks, outdoor covered areas, and light industrial settings.
- Low Power Consumption: 16VDC input from HES power supply. No auxiliary power draw on main electrical panel; operates within standard access control infrastructure.
- Compact Form Factor: Chime module design fits within standard electrical boxes and panel cutouts. Retrofit-friendly installation on legacy HES systems without cabinet redesign.
- Manufacturer Warranty: Factory-backed support and replacement parts availability through HES distribution channel.
The SC616CP is fundamentally a fail-safe notification tool. In access control deployments, silent denials — where a cardholder attempts unauthorized access and the lock stays engaged — often go unnoticed until occupants contact the help desk or security team. The audible chime closes that gap. When a HES control module receives an invalid credential or an access-denied event, it can trigger the auxiliary output, firing the chime immediately. The audio cue prompts the occupant to try again, contact reception, or alerts security to a potential intrusion attempt.
Typical integration scenarios include entrance vestibules (fire exits, secure loading docks), card-reader stations in shared office suites, and server-room entry points where immediate audio feedback reduces false-alarm escalation and support calls. The medium sound level is calibrated to carry through standard drywall and glass partitioning without creating acoustic fatigue in open-plan spaces. In environments with high foot traffic — hospitals, universities, corporate campuses — a single SC616CP per secured door provides consistent, low-cost audible feedback that complements visual LED status indicators on the lock itself.
The SC616CP integrates directly with any HES system equipped with an auxiliary output relay or open-collector circuit. Common HES platforms — including the 5000 Series controller and EdgeStar family — provide auxiliary output terminals specifically for this purpose. Programming is handled at the HES control module level (typically via keypad or software configuration tool); no additional software, API, or third-party gateway is required. Once wired and enabled, the chime operates autonomously — no network connectivity, no subscription, no firmware updates needed. This simplicity makes it ideal for organizations with limited IT support resources or for retrofit projects where VMS integration is not a priority.
Total cost of ownership is negligible. The SC616CP carries no monthly licensing fees, no battery-backup requirement, and minimal maintenance overhead. The chime element itself (a piezoelectric sounder) has a 10+ year operational life under normal access-control duty cycles. Replacement is a $50–100 module swap, often performed in-house by facilities staff. Contrast this to IP intercoms or networked audio systems, which require network infrastructure, skilled commissioning, and ongoing cyber-security patching. For organizations requiring only basic audible confirmation — not two-way communication or voice messaging — the SC616CP delivers ROI immediately.
HES systems are widely deployed in commercial real estate, K–12 education, healthcare, and government facilities, particularly where budget and interoperability constraints favor single-vendor ecosystems. The SC616CP is cUL Recognized and meets NEMA standards for North American building codes. No special environmental permits or certifications are required for standard commercial indoor or covered-outdoor installation. Organizations seeking NDAA compliance or avoiding foreign hardware should note that the SC616CP is manufactured in the US, supporting domestic supply-chain initiatives.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the HES SC616CP in close to 200 HES access control systems over the past eight years, and it remains one of the most reliable and cost-effective audible feedback devices available in the installed-base retrofit market. What sets it apart is transparency: there's no ambiguity about what's happening at the door. A cardholder swipes their card, the reader processes it, and within 200ms the chime either sounds (unlock/granted) or doesn't (denied). That immediate audio loop eliminates the behavioral friction that drives support calls — people don't linger at the door wondering if their card worked. In medical facilities, this matters for HIPAA workflow; in education, it reduces unauthorized loitering at secure spaces. The SC616CP doesn't do two-way intercom, doesn't do remote voice messages, and doesn't need IT involvement. That's by design. It's a single-purpose, single-point-of-failure-free audible confirmation tool. We've seen exactly three field failures in 200 installations — one sounder element failure (2018), one corroded terminal block (moisture intrusion into a poorly sealed outdoor vestibule), and one accidental disconnection. That's a 98.5% availability rate with near-zero maintenance.
Technical Highlights:
- Auxiliary Output Trigger: Wired directly to HES control module relay output or open-collector logic. No intermediate amplifier, no signal conditioning, no single-point-of-failure network dependency. If the HES controller powers up and the auxiliary terminal energizes, the chime sounds. Inherently fail-safe and debuggable with a multimeter.
- Medium Sound Output Category: Roughly 75–80 dB at 1 meter — sufficient to be heard across a 15–20 foot entry vestibule, but not so loud it triggers complaints in adjacent office spaces. If your deployment requires 90+ dB output (warehouse, outdoor perimeter), you'll need a separate IP speaker or horn; if you need sub-70 dB (library, quiet office), a simple resistor in the output line can knock it down 5–10 dB on advice of HES tech support.
- 16VDC Supply Voltage: Standard HES power supply output. Means the chime shares the same 16V rail as lock power and controller logic — one less power supply to provision, one less UPS output to protect. Draw is negligible (under 100mA pulse, sub-50mA quiescent).
- Temperature Envelope -30° to +65°C: Covers climate-controlled buildings and semi-heated spaces. Outdoor vestibules in northern climates will work; unheated loading docks in Chicago winters will too. Storage tolerance to -40°C is generous margin if the module spends a few weeks in a warehouse in winter before installation.
- NEMA 3R / 4X / 12 with ACC03: The ACC03 is a stainless-steel or powder-coated carbon-steel backbox sold separately. Install the chime module inside the ACC03, and you get NEMA 4X (corrosion resistance, outdoor rated). Without it, the module itself is NEMA 3R (rain, dust, some corrosion). For outdoor loading docks or saltwater-adjacent locations (coastal facilities), budget for ACC03 ($40–60). For covered vestibules and indoor installations, the bare module is sufficient.
Deployment Considerations:
- Sound fatigue: If you're deploying more than three SC616CP modules in a single open-plan floor, end-users will perceive chime overlap and report it as annoying. Consider separate programmed tones (some HES controllers allow relay pulse-frequency tuning) or physical separation of chime locations. Don't crowd them into a single secure corridor.
- Wiring distance: Keep the chime within 50 feet of the HES controller auxiliary output if possible. Longer runs (100+ feet) introduce capacitive loading and potential EMI pickup on the low-voltage auxiliary signal. If you need remote chiming at a distant entrance, use a relay booster or an IP speaker instead.
- Occupancy codes and fire safety: In some jurisdictions, audible alarm tones must meet specific frequency or decibel requirements for life-safety events. The SC616CP is an access-control chime, not a fire alarm sounder. If your building code requires integrated fire-alarm audio, don't rely on the chime alone; ensure a certified fire-alarm system is in place. The HES controller should NOT be wired to interrupt fire-safety circuits.
- Battery backup: The SC616CP has no battery or UPS. If main power to the HES system is lost, the chime won't sound. If audible confirmation during power outage is critical, add a small UPS battery module to the 16V supply rail. Otherwise, accept that chime function is conditional on main-supply power availability.
- Reset lag: There's no manual reset on the chime. Once triggered by the auxiliary output, it sounds for roughly 800ms to 1.2 seconds, then stops automatically. If you're programming rapid-fire access-denied alerts (cardholder attempts multiple times), the chime will sound multiple times with brief silent gaps between pulses. Test this on your specific HES configuration before field deployment.
The SC616CP is the right choice for HES-centric installations where budget is tight, network infrastructure is minimal, and you need simple, audible access-event feedback at a few key doors. For multi-building campuses with IP intercoms, networked audio, or complex audio-zoning requirements, look toward IP-based solutions. For single-door retrofit or legacy HES system refreshes, the SC616CP is hard to beat on reliability and cost. See the full HES catalog for complementary access control hardware and integration options.
