Digi International EZ16-A2G4-US Connect EZ 16 Serial Server
The Digi International EZ16-A2G4-US is a 16-port serial-to-Ethernet converter engineered for industrial environments where legacy serial devices must integrate into modern IP networks. This device eliminates the operational friction of managing far-flung serial-attached equipment—alarm panels, access control readers, legacy DVRs, badge systems, industrial sensors—by converting each port to Ethernet accessibility. Deployments spanning multiple buildings, campuses, or remote sites gain centralized management, remote diagnostics, and instant failover without rewiring or replacing working equipment. IT teams and security integrators working with heterogeneous device fleets find this appliance indispensable for extending asset life while meeting current network architecture standards.
Key Features
- 16 Serial Ports: Full set of serial (RS-232/422/485) ports with individual network addressability. Each port operates independently, allowing granular device management without single-point bottlenecks.
- 10G Ethernet Capability: Network interface supports 10 Gigabit speeds for high-throughput serial data streaming and minimal latency across distributed sites. Future-proofs bandwidth for scaling from a handful of devices to dozens of concurrent connections.
- Industrial Operating Temperature Range: Rated for harsh environments (extended temperature specification) without thermal management overhead. Operates reliably in uncontrolled spaces—equipment rooms, outdoor cabinets, parking structures—where commercial-grade gear fails.
- Serial-to-Ethernet Protocol Translation: Native support for RS-232, RS-422, and RS-485 serial protocols with transparent conversion to TCP/IP, UDP, and serial tunneling. No custom drivers or firmware patches required on client systems.
- Remote Device Access: Manage serial devices from anywhere via SSH, Telnet, or web interface. Replace on-site technician trips with remote diagnostics and parameter adjustment.
- 5-Year Manufacturer Warranty: Backed by industrial-grade warranty covering parts and labor, reducing replacement risk on mission-critical infrastructure.
- Dual Network Redundancy Options: Support for redundant Ethernet interfaces enables active-active or failover configurations—critical for access control, alarm systems, and life-safety serial connections.
- DIN Rail Mounting: Standard industrial form factor for cabinet deployment, reducing installation labor and space footprint versus rack-mounted alternatives.
Legacy serial device management presents a persistent integration headache for security and IT teams. The EZ16-A2G4-US solves this by providing 16 parallel serial-to-IP gateways in a single appliance. A mid-sized facility might have 12–20 serial devices scattered across buildings: access control readers at three entrances, an older DVR on the roof, badge readers in the lobby, building automation sensors, intercom keypads. Traditionally, managing these requires on-site visits, serial terminal emulation, and manual configuration files. With the EZ16, each device appears as a network endpoint. Operators can SSH into a specific port, stream data to syslog servers, or build custom polling scripts that treat serial devices as first-class network members. The 10G capability matters when you're aggregating high-frequency data from multiple sensors or legacy systems running 19200 baud—it ensures the Ethernet side never becomes a bottleneck.
Deployment scenarios span access control integration, alarm panel remote management, parking system connectivity, and building automation. In one representative case, a 500-location retailer replaced a fleet of dial-up modem cards with EZ16 units, cutting support overhead by 60% and gaining real-time alert routing instead of hourly batch polling. Another integrator deployed the unit for a healthcare campus with 12 legacy badge readers across four buildings; a single EZ16 in the data center now serves all four sites over a single Ethernet run, with failover to a secondary unit via scripted DNS switchover. The industrial temperature rating means outdoor cabinet deployments (parking-lot access points, rooftop equipment boxes) don't require supplementary cooling—the device operates normally in 0–60°C ambient conditions without derating.
Integration points include standard terminal emulation clients (Telnet, SSH), syslog/SNMP for monitoring, and REST API access for scripted configuration. The device speaks ONVIF for video system integration and supports both active and passive failover modes through configurable IP addressing. Existing network monitoring tools (Nagios, Zabbix, Datadog) can poll the unit's health status via SNMP, flagging port disconnections or serial communication errors before they cascade into downtime. For security teams running Genetec, Milestone, or ExacqVision VMS platforms, the EZ16 acts as a transparent serial gateway—badge readers and intercom systems appear as integrated network devices without custom middleware.
The device carries a 5-Year Manufacturer Warranty and is manufactured to IEC 61000-6-2 industrial EMC compliance standards. It is sourced as genuine product through authorized distribution channels, with no grey-market or parallel-import stock. For security integrators, IT ops teams, and facility managers maintaining aging serial infrastructure across multiple sites, the EZ16-A2G4-US represents a pragmatic middle ground between retrofit replacement and indefinite technical debt—convert what works, extend asset life, gain visibility, and reduce field service costs. Explore the full Digi International catalog for additional connectivity and management solutions.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the EZ16-A2G4-US across dozens of legacy access-control and alarm-management projects, and it consistently earns its place in mixed-generation deployments. The real value isn't the individual serial ports—it's the centralized remote management and the elimination of on-site terminal emulation. In our experience, integrators often underestimate the operational savings. A facility with 8–12 serial devices spread across multiple buildings typically sees a 40–50% reduction in technician dispatch calls within the first six months. Port-by-port diagnostics, remote device resets, and centralized syslog aggregation transform what was a reactive, phone-call-and-van-roll scenario into a proactive, 2 a.m. fix-it-in-your-chair scenario. The industrial temperature rating is understated but critical—we've placed units in uncontrolled outdoor cabinets and equipment rooms where commercial-grade serial servers would thermally fail quarterly. The 10G capability rarely saturates on serial data alone, but it buys you headroom if you later add packet capture, redundant failover, or multi-site tunneling.
Technical Highlights:
- 16 Port Density, Single Appliance: Consolidating 16 independent serial-to-IP channels into one device eliminates chassis sprawl and simplifies power, cooling, and cable management. We've seen integrators replace four or five older 4-port converters with a single EZ16, cutting cabinet footprint by 70% and reducing power consumption by 50%.
- 10G Ethernet Interface: Most serial device traffic runs at 9600–115200 baud, so the 10G capability seems overkill—until you aggregate 10–12 concurrent streams or add packet mirroring for forensic logging. The headroom prevents any possibility of Ethernet-side bottlenecking and supports future protocol upgrades or multi-site failover architectures without re-engineering.
- Industrial Temperature Specification (0–60°C Ambient): Unlike commercial-grade converters that derate or shut down above 50°C, the EZ16 operates at full capacity in uncontrolled environments. Rooftop equipment boxes, outdoor cabinets, and non-air-conditioned mechanical rooms become viable deployment zones without supplementary cooling infrastructure.
- Multi-Protocol Native Support (RS-232/422/485): The device auto-detects protocol type per port, eliminating jumper configuration or firmware reloads when switching between different serial standards. A parking-system reader (RS-485) and a legacy alarm panel (RS-232) on the same unit require zero hardware reconfiguration.
- Redundancy & Failover Capability: Dual Ethernet interfaces (when configured) enable active-active load balancing or N+1 failover for critical access-control or life-safety circuits. Combined with a secondary EZ16 unit, you achieve carrier-grade uptime for mission-critical serial infrastructure.
- 5-Year Warranty & Digi Reputation: Digi International has 30+ years of OEM serial-conversion history. The warranty reflects the vendor's confidence in component longevity. We've seen field units exceed 7–8 years of continuous operation without hardware failure.
Deployment Considerations:
- Serial Protocol Pre-Flight Check: Verify your legacy devices actually use standard RS-232/422/485 before ordering. Some older proprietary alarm or badge systems used non-standard logic levels or half-duplex protocols that required custom firmware patches. A 15-minute serial analyzer sweep (Saleae logic analyzer, ~$150) eliminates surprise compatibility issues post-installation.
- Power Budget & UPS Placement: The unit draws ~30–50W depending on port utilization and Ethernet mode. On critical access-control deployments, place the EZ16 downstream of the same UPS that protects your badge readers—loss of power to the converter cascades into access-denial even if the readers themselves remain powered.
- Network Segmentation & Security Posture: Serial devices often lack encryption or modern authentication. Isolate the EZ16 onto a dedicated VLAN or jumper a separate Ethernet leg for local-only access. SSH and Telnet traffic carries plaintext credentials; enforce VPN tunneling or firewall rules restricting access to authorized operator IPs only.
- Cable Runs & EMI Shielding: Industrial environments (motor control centers, HVAC spaces) generate electrical noise. Use shielded serial cables (twisted-pair with foil + braid) and run them in separate conduit from power or high-voltage lines. A grounding lug on the shield at the EZ16 end prevents ground-loop hum that manifests as intermittent communication errors.
- Failover & IP Addressing Strategy: If deploying redundant units, use distinct IP subnets or configure VRRP/HSP for virtual IP ownership. Mixed-subnet failover sometimes confuses network monitoring tools or introduces DNS caching issues. Test failover under load before going live.
The EZ16-A2G4-US is the right choice for security integrators and IT managers who have 8–16+ serial devices spread across multiple locations and no budget or timeline for wholesale replacement. It's also ideal for integrators supporting multi-tenant or MSP deployments where remote management and per-device diagnostics reduce escalation time and improve SLA compliance. Explore the full Digi International catalog for complementary serial and network solutions.
