Digi International EZ16-C200-US 16-Port Serial Server
The Digi International EZ16-C200-US is a serial-to-Ethernet gateway designed for industrial environments where legacy serial equipment must be integrated into modern IP networks. This 16-port device eliminates point-to-point serial cabling runs and enables centralized remote access to serial peripherals across distributed manufacturing floors, utility substations, and SCADA installations. By converting serial protocols to IP-based communication, the EZ16-C200-US reduces operational overhead in environments where serial device replacement is cost-prohibitive or technically infeasible.
Key Features
- 16 Serial Ports: Full RS-232/422/485 support. Consolidates up to 16 legacy serial devices on a single gateway, eliminating multi-port serial cards and point-to-point cabling.
- Dual Gigabit Ethernet Ports: (2) 10/100/1000 Mbps auto-sensing ports with built-in redundancy. Supports network failover without device reboot.
- 256 MB RAM, 4 GB Flash: Sufficient buffer for high-throughput serial sessions and firmware updates without external provisioning.
- Industrial Operating Temperature: Rated for extended temperature range. Operates in uncontrolled factory and outdoor enclosures without climate conditioning.
- Serial-to-IP Bridging: Transparent protocol conversion preserves serial frame structure. Existing serial applications communicate unchanged; network layer abstraction handled by the gateway.
- Remote Device Management: Telnet, SSH, and Digi Device Management protocol support. Administer serial port settings, baud rates, and flow control from central console without site visits.
- 5-Year Warranty: Industrial-grade warranty reflects durability expectation in manufacturing and utility deployments.
The EZ16-C200-US addresses a persistent challenge in industrial automation: legacy serial equipment (PLCs, motor controllers, RTUs, barcode scanners, weighing scales) cannot be retired overnight, yet modern infrastructure demands IP-based management and monitoring. This gateway bridges that gap by allowing serial peripherals to be accessed, reconfigured, and monitored remotely over standard Ethernet infrastructure without replacing the underlying devices or rewriting control firmware.
Integration into SCADA and manufacturing IT networks is straightforward. The device presents each serial port as a network-accessible socket or virtual COM port, depending on client application requirements. ONVIF-compatible management interfaces and standard Telnet/SSH access eliminate proprietary software dependencies. Dual Gigabit ports provide network redundancy — a critical requirement in utility and continuous-process environments where downtime equals lost revenue.
The 256 MB RAM and 4 GB Flash onboard memory enable buffering of serial transactions during network latency events and support firmware updates without external storage. Industrial temperature rating (typically −20°C to +60°C) makes the unit suitable for outdoor enclosures, factory automation cells, and utility substations where climate control is not available. Installation in a DIN-rail enclosure or panel-mounted configuration is typical; power is supplied via standard industrial PSU or PoE variant if available on the specific SKU.
Organizations standardizing on this gateway reduce mean time to support (MTTS) for legacy serial devices, centralize audit logs of serial device access, and defer capital replacement cycles on functional but aging hardware. Total cost of ownership improves measurably when serial device lifespan extends another 5-10 years through network-enabled remote management rather than forklift replacement.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the EZ16-C200-US across dozens of manufacturing and utility sites where serial-dependent legacy equipment remains operationally critical. The real differentiator versus single- or four-port serial servers is the port density — 16 ports in a compact footprint means a single gateway can consolidate what might otherwise require four separate devices and four network drops. On a factory floor with 12 legacy scales, two barcode scanners, and an older PLC still running RS-232 output, this density translates directly to lower network infrastructure cost and simpler troubleshooting. Dual Gigabit ports with auto-sensing are essential in industrial deployments; we've had sites where a single Ethernet feed failure would isolate critical serial equipment for hours. With redundancy built in, failover is instantaneous and transparent to the serial applications.
One candid limitation: this is a gateway, not a protocol converter. It assumes the serial protocol structure remains unchanged — baud rate, parity, and frame format are preserved. If your legacy device requires handshake lines (RTS/CTS) or specialized flow control, the EZ16-C200-US handles it, but you must know your serial pinout cold before installation. We've seen sites waste time troubleshooting what turns out to be a mismatched baud rate or inverted RX/TX pair because serial documentation was lost a decade ago. Budget time for protocol verification in the lab before deployment.
Technical Highlights:
- 16 Serial Ports with Full Duplex Support: RS-232/422/485 auto-detection. On high-density manufacturing floors (food processing, beverage filling, automotive assembly), this eliminates the need for multi-drop serial extenders or expensive serial-over-fiber solutions for runs beyond 50 feet. Serial traffic is now bounded by network latency, not cable distance.
- Dual Gigabit Ethernet with Auto-Sensing: The auto-negotiation means you don't need to pre-configure port speed — legacy Fast Ethernet switches coexist with Gigabit infrastructure. In utility deployments spanning substations connected to central control rooms 20+ miles away via dark fiber, Gigabit capacity ensures serial throughput doesn't become a bottleneck.
- 4 GB Flash Storage: Enables onboard firmware updates and local logging of serial transactions. On SCADA systems where audit trails are mandatory (NERC CIP for utilities, FDA 21 CFR Part 11 for pharmaceuticals), local logging ensures compliance even during temporary network outages.
- Industrial Temperature Rating: Uncontrolled outdoor enclosures on factory grounds or utility poles are common deployment scenarios. The extended operating range (−20°C to +60°C typical) eliminates the need for climate-controlled cabinets around the gateway itself, reducing facility overhead.
- Transparent Serial-to-IP Conversion: Legacy serial applications see a virtual COM port or raw socket without modification. This means existing control software, monitoring dashboards, and data collection scripts run unchanged — no firmware rewrites, no application porting.
Deployment Considerations:
- Serial protocol verification is non-negotiable. Before field deployment, confirm baud rate, parity, data bits, stop bits, and hardware flow control against documentation or actual device behavior. Mismatches are the #1 root cause of failed deployments we've seen in the field.
- Dual Gigabit ports imply dual network drops or a network switch with redundancy; plan your cabling infrastructure accordingly. In some older factory environments, a single Ethernet run to the equipment closet may be the only network feed available — in that case, failover is degraded to single-port operation until redundant cabling is added.
- Serial cable runs should be managed; long unshielded runs (>100 feet) to noisy industrial environments may require shielded twisted-pair or serial-over-twisted-pair adapters. The gateway doesn't cure poor cabling discipline — it just moves the serial endpoints onto the network.
- Remote access assumes network connectivity back to the control center or remote management console. If serial devices are accessed via this gateway and network fails, they're unreachable — plan for local manual intervention or out-of-band console access on critical devices.
- Bandwidth overhead is minimal for serial traffic (typically <1 Mbps aggregate across all 16 ports at 9600 baud), so shared Ethernet infrastructure with other traffic (video, OPC-UA, Modbus/TCP) is feasible. However, QoS policies should prioritize serial/SCADA traffic to avoid industrial control jitter.
The EZ16-C200-US is the right choice for integrators and end-user engineering teams managing mixed-era industrial networks where serial device replacement is deferred or infeasible. It's not a protocol converter — it's a multiplexer and access bridge. If you have 10+ legacy serial devices scattered across a facility and your network already supports Gigabit Ethernet, this gateway eliminates point-to-point serial cabling overnight and enables remote diagnostics on equipment that otherwise requires site visits. Explore the full Digi International catalog for additional serial, cellular, and industrial connectivity solutions.
