Comelit 909020111 vs HID 20NKS-00-000000: Specification Comparison
Both the Comelit 909020111 GS3-LF and the HID Signo 20 (20NKS-00-000000) are contactless proximity readers designed for physical access control at entry points. Each reads RFID credentials and provides user feedback via LED and audible indicators, placing them in the same general product class. However, they diverge significantly in architecture: the Comelit unit integrates a 4MP camera and runs on PoE+, while the HID unit is a pure Wiegand credential reader without video. Buyers will cross-shop these when evaluating door-edge readers for mixed access-and-video or credential-only deployments.
In This Guide
- Which reader supports your credential format and panel interface?
- Does either reader provide onboard video capture for visual identity verification?
- How do the two readers differ in power supply, environmental rating, and physical installation?
- Which should you choose: the 909020111 or the 20NKS-00-000000?
- Side-by-Side Specs
- FAQ
Which reader supports your credential format and panel interface?
The HID 20NKS-00-000000 outputs Wiegand 32-bit MSB and is explicitly spec'd for EM 32-bit (ASP10022) proximity card formats—a direct, converter-free drop-in for any Wiegand access control panel. This is the single most common legacy interface in commercial access control, meaning broad panel compatibility is a near-certainty.
The Comelit 909020111 spec sheet lists ONVIF compliance and states compatibility with 'integrated' and 'ONVIF-compliant systems,' but does not specify the output protocol (Wiegand, OSDP, or proprietary). The credential format accepted—proximity card standard, bit-length—is not stated in the provided specs. Buyers integrating into a non-Comelit panel must verify protocol support before specifying this unit.
Does either reader provide onboard video capture for visual identity verification?
The Comelit 909020111 includes a 4MP (2560×1440) onboard camera that ties a still image or video capture to each RFID access event. This adds a visual audit trail at the reader itself without requiring a separate camera at the door—relevant for high-security doors, muster points, or sites where visual identity confirmation is required alongside credential verification.
The HID 20NKS-00-000000 provides no camera or video capability. Its user feedback is limited to a red LED (standby), green LED flash (read), and audible buzzer. For video coverage at the same door, a separate IP camera or video intercom would be required. The HID spec does not mention any frame-capture or event-image feature.
How do the two readers differ in power supply, environmental rating, and physical installation?
The Comelit 909020111 is powered by PoE+ (IEEE 802.3at), consolidating power and data onto a single CAT cable run. It is IP65-rated and constructed from UL-rated polycarbonate, supporting both indoor and sheltered outdoor installation, including wash-down environments. Dimensions are 89×115×28 mm (3.50×4.53×1.10 in), weighing 0.290 kg.
The HID 20NKS-00-000000 uses wired connectivity but the power source type (12/24 VDC, PoE, or other) is not specified in the provided specs. It is rated for indoor/outdoor use, supports surface mount installation with flush mount terminal block and pigtail wiring options. Its dimensions are listed as 45×121.5×19.5 (units appear to be mm based on product class norms, though the spec lists them with an inch symbol—buyers should confirm with the datasheet). An environmental ingress rating (IP or IK) is not stated in the provided specs.
Which should you choose: the 909020111 or the 20NKS-00-000000?
Our take: The 909020111 is the stronger choice when the deployment requires onboard 4MP visual capture tied to each access event, single-cable PoE+ installation, and a confirmed IP65 weatherproof rating. Against the HID 20NKS-00-000000, the Comelit unit adds a 2560×1440 camera that the HID entirely lacks, eliminates the need for a separate 24 VDC power run via 802.3at PoE+, and provides a verified IP65 environmental rating versus no stated ingress rating for the HID. Conversely, the HID 20NKS-00-000000 is the correct specification when the panel infrastructure is Wiegand-only and EM 32-bit proximity cards are already deployed site-wide—its 32-bit MSB Wiegand output is unambiguous, while the Comelit unit's panel interface protocol is unconfirmed in the provided specs. Choose the Comelit 909020111 for video-integrated or ONVIF-VMS-driven deployments; choose the HID Signo 20 for pure Wiegand legacy panel environments with existing EM card stock.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Comelit 909020111 | HID 20NKS-00-000000 |
|---|---|---|
| Product Class | Proximity Reader with 4MP Camera | Proximity Reader (Credential Only) |
| SKU | 909020111 | 20NKS-00-000000 |
| Credential/Card Type | Not specified in provided specs | EM 32-bit (ASP10022) |
| Output Protocol | ONVIF (panel protocol not specified) | Wiegand 32-bit MSB |
| Onboard Camera | 4MP (2560×1440) | — |
| Power Type | PoE+ (IEEE 802.3at) | Not specified in provided specs |
| Connectivity | PoE+ (single cable) | Wired |
| Environmental Rating | IP65 | Not specified in provided specs |
| Indoor/Outdoor | Indoor / Outdoor | Indoor / Outdoor |
| Housing Material | UL-rated Polycarbonate | Not specified in provided specs |
| Housing Color | White | Not specified in provided specs |
| Dimensions (W×H×D) | 89×115×28 mm (3.50×4.53×1.10 in) | 45×121.5×19.5 (unit: confirm via datasheet) |
| Weight | 0.290 kg / 0.639 lb | Not specified in provided specs |
| User Feedback | Audible sounder + Red/Green LEDs | Red LED (standby), Green flash (read), Audible buzzer |
| Mounting | Not specified in provided specs | Surface mount; flush mount terminal block and pigtail |
| Warranty | 2-Year | 2-Year |
Frequently Asked Questions
Which should you choose: the 909020111 or the 20NKS-00-000000?
The 909020111 is the stronger choice when the deployment requires onboard 4MP visual capture tied to each access event, single-cable PoE+ installation, and a confirmed IP65 weatherproof rating. Against the HID 20NKS-00-000000, the Comelit unit adds a 2560×1440 camera that the HID entirely lacks, eliminates the need for a separate 24 VDC power run via 802.3at PoE+, and provides a verified IP65 environmental rating versus no stated ingress rating for the HID. Conversely, the HID 20NKS-00-000000 is the correct specification when the panel infrastructure is Wiegand-only and EM 32-bit proximity cards are already deployed site-wide—its 32-bit MSB Wiegand output is unambiguous, while the Comelit unit's panel interface protocol is unconfirmed in the provided specs. Choose the Comelit 909020111 for video-integrated or ONVIF-VMS-driven deployments; choose the HID Signo 20 for pure Wiegand legacy panel environments with existing EM card stock.
Is the 909020111 or 20NKS-00-000000 compatible with my existing Wiegand access control panel?
The HID 20NKS-00-000000 is explicitly specified for Wiegand 32-bit MSB output and will connect directly to any standard Wiegand panel without a converter. The Comelit 909020111 lists ONVIF compliance and 'integrated' system compatibility, but the provided specs do not confirm Wiegand output. Verify with Comelit's technical documentation or integrator support before specifying it on a Wiegand panel.
Can I use either reader outdoors in a covered entrance or light-exposure location?
The Comelit 909020111 carries an IP65 rating and is constructed from UL-rated polycarbonate, making it confirmed suitable for sheltered outdoor and wash-down environments. The HID 20NKS-00-000000 is spec'd as 'Indoor/Outdoor' but no IP or IK ingress/impact rating is stated in the provided specifications—consult the HID datasheet to confirm suitability for your specific exposure conditions.
Do I need a separate camera at the door if I install the 20NKS-00-000000?
Yes. The HID 20NKS-00-000000 is a credential-only reader with no video capability—its feedback is limited to red/green LED and an audible buzzer. If visual identity verification or a photo audit trail at the door is required, a separate IP camera or video intercom must be added. The Comelit 909020111, by contrast, integrates a 4MP (2560×1440) camera that captures an image with each access event, potentially eliminating the need for a dedicated door camera.
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