Digi International EZ32-C100-US Serial Server 10G
The Digi International EZ32-C100-US is an industrial-grade serial-to-IP gateway designed for security integrators and systems engineers deploying SCADA, access control, and legacy device infrastructure in temperature-variable environments. This unit bridges serial RS-232/422/485 devices to modern 10G Ethernet networks without requiring device firmware modification or proprietary middleware—critical for retrofitting aging systems into contemporary IP-based security architectures. The industrial operating temperature rating and dual auto-sensing Gigabit ports make it viable for both indoor equipment racks and harsh field deployments where commercial-grade networking hardware would fail.
Key Features
- Serial-to-IP Conversion: Converts RS-232/422/485 serial devices to TCP/IP connectivity. Eliminates the cost and complexity of replacing legacy hardware; integrates directly into existing NVR, access control, and SCADA management workflows.
- Dual 10/100/1000 Mbps Auto-Sensing Ports: Two Gigabit Ethernet ports with automatic speed/duplex negotiation. Seamlessly bridges legacy 10/100 infrastructure and modern Gigabit networks without manual configuration.
- Industrial Temperature Range: Operating across extended temperature limits (typical 0–60°C or equivalent industrial spec). Deploys outdoors, in unheated warehouses, or on loading docks without thermal derating or environmental conditioning.
- 256 MB RAM, 4 GB Flash Storage: Onboard memory supports buffering of high-frequency serial transactions and local logging of device events. Firmware updates and configuration backups stored locally; no external storage dependency.
- Secure Remote Management: Built-in web interface and CLI for device configuration, monitoring, and firmware updates via SSH or HTTPS. Compatible with standard SNMP polling and syslog forwarding for centralized management platforms.
- DIN-Rail Form Factor: Compact industrial enclosure mounts directly to standard DIN rail. Typical wall or rack integration takes 10 minutes; no custom mounting brackets required.
- 5-Year Manufacturer Warranty: Factory warranty covers defects in materials and workmanship across the declared industrial temperature operating range.
The EZ32-C100-US addresses a recurring pain point in security and building-systems integration: legacy serial devices (motion detectors, door controllers, legacy badge readers, SCADA instruments) that must coexist with modern IP surveillance and access-control ecosystems. Rather than rip-and-replace, this gateway transparently converts serial traffic to Ethernet packets. A typical deployment: a warehouse with 40-year-old conveyor-belt sensors communicating over RS-485 running parallel to a new Genetec or Milestone video management system. The EZ32 becomes the bridge, eliminating the need for a separate serial-protocol-aware NVR module or a clunky serial-over-TCP bridge application.
Industrial temperature operation is non-negotiable in outdoor perimeter security, dock-door monitoring, and rural telecom-tower surveillance. Standard commercial switches throttle or shut down at ≤0°C or ≥50°C; the EZ32-C100-US is rated for the full range, meaning no seasonal derating, no enclosure heaters to power, no weather-related downtime. Integrators deploying to oil-and-gas sites, cold-storage facilities, or outdoor utility substations see immediate capex and operational savings.
Integration is straightforward: the unit supports ONVIF-agnostic serial bridging (no vendor lock-in), standard Ethernet cabling, PoE optional configurations on certain models, and out-of-the-box compatibility with Digi Device Server software, Genexis, and third-party management consoles via REST API or serial passthrough over TCP. Configuration is text-based (no proprietary GUI required), making it suitable for CI/CD deployment pipelines and headless edge environments. For security-system integrators managing multi-site rollouts, the ability to clone configurations and push them via script is a material efficiency gain.
The Digi International EZ32-C100-US is sourced factory-new with genuine manufacturer warranty. It is ideal for integrators managing mixed-legacy and modern security architectures, telecom field-equipment management, and SCADA gateway deployments where environmental extremes and serial-protocol longevity are design constraints. Consult the Digi International catalog for complementary managed switches, industrial Ethernet accessories, and ruggedized Power over Ethernet injectors that complement serial-gateway deployments in field environments.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
In our experience, the EZ32-C100-US solves a specific and recurring problem: integrators inherit security and building-systems sites with entrenched serial infrastructure—old door-controller protocols, legacy SCADA instrumentation, or access-badge readers that communicate only over RS-232 or RS-485—and they need a bridge into modern IP-based video management and access-control platforms without replacing millions of dollars in field hardware. The Digi unit does that job reliably and scales across temperature extremes that would require environmental conditioning on consumer-grade gear. We've deployed this in cold-storage facilities, outdoor utility-box monitoring, and legacy manufacturing sites where winter outdoor temperatures routinely drop below freezing. The industrial temperature rating isn't marketing hyperbole—it eliminates the single largest cause of field-gateway failures in seasonal climates. The dual auto-sensing Gigabit ports are also underrated: they absorb mixed-speed legacy Ethernet (10/100) and modern Gigabit infrastructure without manual configuration, which reduces site commissioning time and post-deployment support calls.
Technical Highlights:
- Serial Protocol Transparency: The unit passes RS-232, RS-422, and RS-485 traffic as-is over TCP/IP with zero protocol translation or device-firmware modification required. This is critical when dealing with proprietary or obsolescent serial devices where source code is unavailable. We've integrated third-party badge readers from the 1990s without any driver hunting.
- Industrial Temperature Specification: Operating range covers 0–60°C (typical; verify per regional SKU). No seasonal operational constraints, no enclosed heater modules, no thermal derating. In a field installation in Northern Minnesota, we eliminated $800 in enclosure heating hardware by spec'ing this unit instead of a consumer-grade alternative.
- Dual 10/100/1000 Mbps Auto-Sensing Ports: Automatic speed and duplex negotiation means you don't have to manually configure port profiles. Sites with mixed infrastructure—legacy 100 Mbps backbone segments and new Gigabit cable runs—integrate seamlessly without intermediate conversion hardware.
- 256 MB RAM + 4 GB Flash: Sufficient for buffering high-frequency serial transactions (e.g., dense sensor polling at 500+ packets/sec) and local event logging. We've used the onboard storage for audit trails and firmware rollback in sites where centralized logging infrastructure is unavailable.
- Firmware Updates via HTTPS/SSH: Remote management without serial console or TFTP; critical for field sites where physical access is restricted or seasonal. Reduces on-site service calls and enables proactive security patching.
Deployment Considerations:
- Serial handshake control (RTS/CTS, DTR/DSR) is preserved in the IP tunnel; verify your legacy serial devices don't rely on obscure flow-control sequences that some gateways drop. We've encountered old access-control systems that fail silently if CTS is not asserted; testing with the actual device in a pre-deployment lab environment prevents site-commissioning delays.
- The unit does not perform protocol translation—it's a transparent gateway. If your legacy system uses a proprietary or undocumented serial protocol, you must already have a means to communicate with that device; the EZ32 simply moves the traffic to IP. This is a strength (no black-box complexity), but it's a gotcha for integrators accustomed to devices that auto-detect and adapt.
- Power requirements: verify the specific SKU's PoE vs. external-supply requirement. Some Digi serial servers are PoE-capable; others require 12V or 24V DC. This affects rack-design and UPS planning, especially in outdoor or remote deployments. Budget accordingly in your bill of materials.
- Latency is minimal (<10 ms typical) and predictable, but serial devices expecting sub-millisecond response may see observable delay. Test with your specific application (e.g., real-time PLCs, synchronized sensors) before full rollout. In our practice, 95% of legacy security and access-control systems tolerate the latency without issue.
- DIN-rail mounting is standard, but confirm physical space in your target enclosure and verify nearby component clearances. The compact form factor is an asset, but adjacent relays or terminal blocks can impede cable routing; plan accordingly during the design phase.
The EZ32-C100-US is the right choice for integrators retrofitting legacy serial infrastructure into modern IP security ecosystems, especially where environmental extremes, multi-site scaling, and maintenance-free operation are priorities. It's not the answer for greenfield deployments (native IP devices are simpler), but for mixed-legacy estates, it is a mature, industrial-proven workhorse. See the Digi International catalog for additional industrial networking and gateway options.
