Lantronix ED2100002-01 Dual-Port Serial Device Server
Overview
The Lantronix ED2100002-01 is a compact, dual-port serial-to-Ethernet device server built for engineers who need to pull legacy RS-232, RS-422, or RS-485 equipment onto a TCP/IP network without rearchitecting around it. At 2.8" × 3.7" × 0.9" and 14.1 oz, it sits unobtrusively on a shelf or DIN-rail adjacent to the equipment it serves — a practical fit for industrial control panels, access control hardware, POS terminals, and building automation controllers that predate native Ethernet but still have years of useful life ahead of them. If you're managing a mixed fleet of networked and serial devices and need a low-overhead bridge that won't require a dedicated server or software stack, the ED2100002-01 (often searched as ED2100002 01) is the unit to evaluate.
Key Features
- Two Independent RS-232/422/485 Ports: Both ports are DB-9 connectors supporting all three serial standards — so a single unit can simultaneously bridge a legacy access reader on RS-485 and a POS terminal on RS-232, rather than burning two separate converters. That matters in rack-constrained or cabinet-constrained deployments where every cubic inch counts.
- 10/100Base-TX Ethernet Uplink: The single RJ-45 port supports auto-negotiating Fast Ethernet, which means it fits comfortably on any modern PoE or non-PoE network switch port without special configuration. Half- and full-duplex modes are both supported, so older unmanaged switches won't cause link negotiation headaches.
- 48 MHz Processor with 256 KB SRAM + 2 MB Flash: The onboard processor handles protocol translation and session management without external compute. The 2 MB flash stores firmware locally — relevant if you're deploying in locations where field updates need to survive power cycles without a TFTP server standing by.
- TCP/IP, UDP/IP, and ICMP/IP Transport: Support for both TCP and UDP means you can deploy this in either connection-oriented (TCP socket) or datagram (UDP) topologies. UDP is particularly useful for broadcast-based automation protocols; TCP gives you the reliable delivery guarantees that access control and alarm systems typically require.
- SNMP, Telnet, and HTTP Remote Management: Three management channels give you flexibility: SNMP integrates with existing NMS platforms for trap-based alerting; HTTP provides a browser-accessible configuration interface without specialized software; Telnet covers CLI access for scripted provisioning workflows. All three operate simultaneously — you don't have to pick one.
- DHCP and ARP Support: DHCP client support means zero-touch IP assignment in managed networks; static addressing is still configurable for environments where fixed IP mapping to serial endpoints is required. ARP support ensures the unit resolves properly on Layer 2 segments without manual table entries.
- Flow Control: Hardware and software flow control on the serial side prevents buffer overruns on high-throughput serial streams — critical for devices like barcode scanners or PLC interfaces that burst data and don't handle dropped characters gracefully.
- International PSU with Regional Adapters: The included power supply accepts multiple regional plug formats, which removes the procurement friction on international deployments or multi-site rollouts where local outlet standards differ. Power draw is 1.8W — negligible on any power budget, and no PoE infrastructure required.
- Status Indicators for Link Activity, Port Duplex, Power, and Status: Four onboard LEDs let field technicians confirm network link, duplex negotiation, power state, and device status at a glance — no laptop required for initial bring-up verification.
- Broad Compliance Stack: FCC Class A/B, CE, CSA, UL, cUL, TÜV, VCCI, CISPR 22 Class A, RoHS, and WEEE certifications cover deployment across North America, Europe, and Japan. RoHS and WEEE compliance matters for government and enterprise procurement desks with environmental reporting requirements.
Integration & Compatibility
The ED2100002-01 connects directly to any serial device server-compatible management platform via SNMP v1/v2c, making it visible alongside switches and routers in most enterprise NMS deployments. The HTTP interface provides a self-contained configuration UI accessible from any browser on the same network segment — useful for initial commissioning without SNMP infrastructure in place. For automation integrations, the device exposes virtual COM port functionality that allows Windows-based SCADA and building management software to communicate with the serial devices as though they were locally attached — a technique that avoids rewriting application-layer serial addressing when moving to networked architecture. Operating range of 32°F to 140°F (0°C to 60°C) covers most indoor industrial and commercial environments; for outdoor or extreme-temperature enclosures, verify ambient conditions before deployment. For guidance on planning the network infrastructure around device servers and serial integrations, the network planning guide covers segmentation and port-capacity considerations relevant to mixed serial/IP deployments.
Frequently Asked Questions
Q: What serial standards does the ED2100002-01 support on its two ports?
A: Both DB-9 ports support RS-232, RS-422, and RS-485 — the three most common industrial and commercial serial standards. Each port can be configured independently, so you can run different serial modes on each simultaneously.
Q: Does the ED2100002-01 require a separate power supply, or does it draw power from the network switch?
A: It uses an external power adapter — an international PSU with regional plug adapters is included in the box. It does not support PoE, so no PoE switch is required or relevant. Power draw is 1.8W.
Q: What is the warranty on the ED2100002-01?
A: Lantronix provides a 2-year manufacturer warranty on the ED2100002-01.
Q: Can I manage the ED2100002-01 remotely without installing software?
A: Yes. The device includes an HTTP-based web interface accessible from any browser on the same network, plus Telnet CLI access and SNMP for NMS integration. No dedicated client software is required for day-to-day management.
Q: Is the ED2100002-01 RoHS compliant?
A: Yes. The unit carries RoHS and WEEE certifications, along with FCC Class A/B, CE, CSA, UL, cUL, TÜV, and VCCI / CISPR 22 Class A.
Q: What operating temperature range does the ED2100002-01 support?
A: The unit is rated for 32°F to 140°F (0°C to 60°C). This covers most indoor commercial and light-industrial environments, but verify ambient conditions before deploying in high-heat enclosures.
The ED2100002-01 earns its place in projects where the alternative is replacing functional serial-based equipment just to get it on the network. Its 48 MHz processor and 2 MB flash aren't headline numbers, but they're sized correctly for the job — managing two serial streams through a Fast Ethernet uplink with SNMP-visible status, without the complexity or cost of a multi-port terminal server when you only need two connections.
Technical Highlights:
- Dual RS-232/422/485 DB-9 Ports: Supporting all three serial standards on both ports means one unit handles heterogeneous serial mixes — a common reality in access control or building automation panels where RS-485 bus devices and RS-232 point-to-point devices coexist.
- 1.8W Power Draw: At 1.8W, this device adds essentially nothing to an existing power budget. In UPS-protected network closets where load headroom is already counted, that distinction matters more than it looks on paper.
- SNMP + HTTP + Telnet Management: Three simultaneous management interfaces mean this unit integrates into existing NMS infrastructure without requiring workflow changes — SNMP traps feed your alerting, HTTP handles ad-hoc config, Telnet supports scripted provisioning at scale.
Deployment Considerations:
- The 140°F (60°C) upper operating limit is adequate for ventilated indoor enclosures, but tight for sealed outdoor or rooftop cabinets in warm climates — measure ambient before committing this unit to an unventilated panel.
- The OS requirement listed is Windows 98/ME/NT/2000/XP for the virtual COM port driver; the device itself is network-accessible from any platform via its HTTP or Telnet interface. Don't let that legacy OS note deter you if you're managing via SNMP or browser.
This is the right unit for a facilities or IT team managing a building with legacy serial endpoints — door controllers, HVAC interfaces, or POS peripherals — that need network visibility without a full infrastructure replacement. If you have more than two serial endpoints at a single site, plan your unit count early; at two ports per device, larger deployments scale in predictable increments.
