ACTi ZNR-423 vs ACTi ZNR-224: Specification Comparison
Both the ACTi ZNR-423 and ACTi ZNR-224 are 32-channel rackmount NVRs from the same manufacturer, positioned for enterprise and large-scale IP camera deployments. This comparison examines the three dimensions most critical to an integrator or IT buyer selecting between them: storage capacity and throughput, onboard intelligence and analytics, and connectivity plus integration compatibility. Both units share the same channel count and rack form factor, making them genuine cross-shop candidates where the differentiators lie in drive bay count, throughput ceiling, and processing capabilities.
In This Guide
Which NVR offers more storage capacity and higher recording throughput?
The ZNR-423 provides four drive bays versus the ZNR-224's two bays, giving it twice the raw storage expansion headroom. For installations where long retention windows or high-bitrate streams drive large storage requirements, the ZNR-423's 4-bay configuration directly addresses that need without requiring external expansion.
On throughput, the ZNR-224 edges ahead at 192 Mbps aggregate recording bandwidth compared to the ZNR-423's 160 Mbps. That 32 Mbps difference (20% higher on the ZNR-224) matters when cameras are configured for high-resolution or high-frame-rate streams that push per-channel bitrates upward. Buyers must weigh whether the throughput advantage outweighs the storage bay deficit for their specific retention and bitrate profile.
Does either NVR include onboard analytics or edge processing capabilities?
The ZNR-224 spec explicitly lists a Deep Learning Processing Unit (DLPU), enabling onboard object detection and behavioral analytics without offloading computation to a separate server. This is a meaningful operational differentiator for deployments that require local analytics — person/vehicle detection, line crossing, intrusion — particularly where WAN bandwidth or server licensing costs are constraints.
The ZNR-423 spec does not list any analytics engine or DLPU. No onboard analytics capability is documented for it. Buyers requiring edge analytics from the recorder itself should note this absence; the ZNR-423 would depend on camera-side analytics or a separate VMS analytics license to achieve equivalent intelligence.
How do the two units compare on connectivity, power input, and VMS integration?
Both NVRs support ONVIF and provide VGA output. The ZNR-224 specifies ONVIF Profile S/T compliance and notes dual HDMI/VGA outputs in its card bullets, whereas the ZNR-423 spec lists VGA connectivity only and does not specify ONVIF profile levels or HDMI output. The ZNR-224's explicit Profile S/T compliance is the documented standard for interoperability with third-party VMS platforms.
On power, the ZNR-424 spec lists PoE as the power field entry — an unusual designation for a rackmount NVR and not further clarified in the provided specs. The ZNR-224 specifies 12V DC power input, which is a conventional rackmount NVR power supply type. Installers should verify the ZNR-423 power input specification directly with ACTi before designing power infrastructure, as PoE powering of a 4-bay rackmount NVR would be atypical.
Audio handling differs slightly: the ZNR-423 lists 'Audio supported' while the ZNR-224 specifies 'Audio input/output,' indicating the ZNR-224's audio capability is more explicitly defined in the provided specs.
Which should you choose: the ZNR-423 or the ZNR-224?
Our take: The ZNR-224 is the stronger choice when onboard analytics and higher recording throughput are the primary requirements; the ZNR-423 is preferable when maximizing local storage capacity is the dominant concern. The ZNR-224 leads on three concrete spec points: a 192 Mbps throughput ceiling versus 160 Mbps on the ZNR-423 (32 Mbps higher), an onboard DLPU for local deep-learning analytics that the ZNR-423 does not list, and explicit ONVIF Profile S/T compliance with documented HDMI output. The ZNR-423 counters with four drive bays against the ZNR-224's two, doubling on-unit storage scalability. For analytics-driven enterprise deployments running high-bitrate streams, the ZNR-224 fits better. For large-scale installations prioritizing extended on-unit retention over analytics, the ZNR-423's 4-bay configuration is the practical advantage. Note: the ZNR-423 power spec should be confirmed with ACTi before procurement.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | ACTi ZNR-423 | ACTi ZNR-224 |
|---|---|---|
| Brand | ACTi | ACTi |
| MPN | ZNR-423 | ZNR-224 |
| Type | 32-Channel 4-Bay Rackmount NVR | 32-Channel 2-Bay Rackmount NVR |
| Channel Count | 32 | 32 |
| Drive Bays | 4-bay (external) | 2-bay (user-supplied drives) |
| Max Recording Throughput | 160 Mbps | 192 Mbps |
| Onboard Analytics (DLPU) | — | Deep Learning (DLPU) |
| ONVIF Compliance | Yes | ONVIF Profile S/T |
| Video Output | VGA | VGA (HDMI also noted in bullets) |
| Audio | Audio supported | Audio input/output |
| Power Input | PoE (per spec — verify with ACTi) | 12V DC |
| Form Factor | Rackmount NVR | Rackmount NVR |
| Mount Type | Rack | Rack |
| VMS Compatibility | ONVIF-compliant | ONVIF Profile S/T |
| Target Deployment Scale | Large-scale | Enterprise-grade |
Frequently Asked Questions
Which should you choose: the ZNR-423 or the ZNR-224?
The ZNR-224 is the stronger choice when onboard analytics and higher recording throughput are the primary requirements; the ZNR-423 is preferable when maximizing local storage capacity is the dominant concern. The ZNR-224 leads on three concrete spec points: a 192 Mbps throughput ceiling versus 160 Mbps on the ZNR-423 (32 Mbps higher), an onboard DLPU for local deep-learning analytics that the ZNR-423 does not list, and explicit ONVIF Profile S/T compliance with documented HDMI output. The ZNR-423 counters with four drive bays against the ZNR-224's two, doubling on-unit storage scalability. For analytics-driven enterprise deployments running high-bitrate streams, the ZNR-224 fits better. For large-scale installations prioritizing extended on-unit retention over analytics, the ZNR-423's 4-bay configuration is the practical advantage. Note: the ZNR-423 power spec should be confirmed with ACTi before procurement.
Is the ZNR-423 or ZNR-224 better for longer video retention?
Based on the provided specs, the ZNR-423 is better suited for longer retention. It offers four drive bays versus the ZNR-224's two bays, allowing twice the on-unit storage capacity. Both units require user-supplied drives, so actual retention depends on drive capacity selected, number of channels active, and per-channel bitrate.
Does either the ZNR-423 or ZNR-224 support onboard video analytics?
Only the ZNR-224 lists onboard analytics capability. Its spec includes a Deep Learning Processing Unit (DLPU) for local object detection and behavioral analytics. The ZNR-423 spec does not document any analytics engine or DLPU, so analytics on that unit would need to be handled at the camera level or via a separate VMS.
Which NVR handles more camera bandwidth — the ZNR-423 or ZNR-224?
The ZNR-224 handles more bandwidth per the provided specs, rated at 192 Mbps aggregate recording throughput compared to 160 Mbps for the ZNR-423. The 32 Mbps difference becomes relevant when deploying high-resolution or high-frame-rate cameras across all 32 channels simultaneously.
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