W&T Com Server Modules | W&T 58631

Technical Dossier

Product Details And Specifications

W&T Com Server Series: Comprehensive Module Range and Technical Overview

The W&T (Wiesemann & Theis) Com Server series represents a mature and widely deployed product line of serial-to-Ethernet device servers used across global heavy industry. Installations span chemical processing plants, nuclear facility auxiliary systems, petroleum refineries, and continuous manufacturing environments where legacy serial devices (RS-232, RS-422, RS-485) must be integrated into modern TCP/IP networks. The series has accumulated a substantial installed base in European and Asian industrial infrastructure, making long-term spare parts availability a critical operational concern for plant maintenance engineers and procurement teams.

The Evolution of Com Server Architecture

W&T Com Server modules were introduced to address the industrial need for transparent serial tunneling over Ethernet without requiring PLC or SCADA software modification. Early generations (Com Server Standard, Com Server Office) provided single-port RS-232 connectivity with 10 Mbit Ethernet and were configured via a proprietary Windows utility. Subsequent generations introduced multi-port variants, RS-422/RS-485 support, and 100 Mbit Fast Ethernet interfaces. The Com Server Highspeed and Com Server Pocket lines extended the architecture to higher baud rates (up to 1 Mbit/s) and compact DIN-rail form factors respectively. Later variants added WLAN connectivity (Com Server WLAN), USB-to-serial bridging, and web-based configuration interfaces replacing the legacy Windows tool. Compatibility considerations arise when integrating older single-port units into modern managed switch environments that enforce 802.1Q VLAN tagging or 802.1X port authentication — features not supported on first-generation firmware. Firmware upgrade paths exist for mid-generation units; end-of-life units require hardware replacement with current equivalents.

Com Server Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked W&T Com Server models. Each unit is classified by interface type and primary function:

58631: Com Server Standard, 1× RS-232 DB9, 10/100 Mbit Ethernet, serial tunneling server.
58032: Com Server Office, 1× RS-232 DB25, 10 Mbit Ethernet, basic serial-to-IP gateway.
58033: Com Server Standard RS-422/485, 1× RS-422/RS-485 terminal block, 10/100 Mbit, half/full duplex.
58034: Com Server Highspeed, 1× RS-232, baud rates to 1 Mbit/s, 10/100 Mbit Ethernet.
58035: Com Server Pocket, compact DIN-rail, 1× RS-232 DB9, 10/100 Mbit, low-profile housing.
58036: Com Server Pocket RS-422/485, compact DIN-rail, RS-422/RS-485, 10/100 Mbit Ethernet.
58037: Com Server 4-port, 4× RS-232 DB9, 10/100 Mbit, multi-device serial aggregation.
58038: Com Server 4-port RS-422/485, 4× RS-422/RS-485, 10/100 Mbit, industrial bus aggregation.
58039: Com Server WLAN, 1× RS-232, IEEE 802.11b/g WLAN, wireless serial-to-IP bridging.
58040: Com Server USB, 1× USB Type-B device port, 10/100 Mbit, USB peripheral network sharing.
58041: Com Server Highspeed RS-422/485, RS-422/RS-485, baud to 1 Mbit/s, 10/100 Mbit Ethernet.
58042: Com Server 8-port, 8× RS-232, 10/100 Mbit, high-density serial device server.
58043: Com Server 8-port RS-422/485, 8× RS-422/RS-485, 10/100 Mbit, multi-bus industrial gateway.
58044: Com Server Extender, RS-232 range extension over Ethernet, point-to-point serial link replacement.
58045: Com Server Print Server, 1× RS-232 + parallel port, 10/100 Mbit, legacy printer network integration.
58046: Com Server Basic Line, 1× RS-232, 10/100 Mbit, cost-reduced variant for non-critical applications.

Sourcing Hard-to-Find & Obsolete Com Server Parts

Several first- and second-generation Com Server models have reached end-of-sale status with W&T. DriveKNMS maintains a dedicated inventory of tested surplus and refurbished Com Server units to support lifecycle extension programs at facilities where full DCS or SCADA migration is not yet feasible. For plants operating under IEC 61511 functional safety constraints or with frozen control system configurations, replacing a failed Com Server gateway with an identical unit is frequently the only compliant option. DriveKNMS sources units through certified industrial surplus channels, performs incoming inspection, and provides traceability documentation. Customers requiring long-lead procurement for annual maintenance shutdowns can arrange consignment stock agreements. Emergency same-day dispatch is available for critical process units subject to stock confirmation.

Quality Control for the Com Server Range

Com Server modules present specific test challenges due to their dual-domain architecture: the serial interface side must be validated independently from the Ethernet network stack. DriveKNMS applies a structured test protocol for all Com Server units entering inventory. Serial interface testing covers RS-232 signal levels (TxD, RxD, RTS, CTS, DTR, DSR) measured against EIA-232 voltage thresholds, RS-422/RS-485 differential pair integrity, and loopback communication at multiple baud rates from 300 bps to maximum rated speed. Ethernet interface testing covers auto-negotiation at 10/100 Mbit, MAC address verification against W&T OUI range, and TCP/IP stack responsiveness via ICMP and Telnet session establishment. Firmware version is recorded and compared against the last known production release. Units with corrupted firmware are reflashed where recovery tools are available; units with hardware faults on the serial UART or Ethernet PHY are quarantined and not resold. Configuration is reset to factory defaults prior to dispatch.

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