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Rincon Research Corporation’s E2S2 is becoming deprecated. It is a second generation, bidirectional, Ethernet-to-serial converter card with USB, RS-232, I2C, and GPIO capability. It enables a single Ethernet control port for a chassis or other complex system. E2S2 is a flexible system supervisor and system controller. It ties together a variety of system components for remote management, including fans, USB devices, Ethernet devices, analog sensors, and digital sensors.


  • Managed or unmanaged 6-port Ethernet switch
    • Includes distributed switch architecture (DSA) capabilities to allow the host to control each port individually
  • Command and control via 10/100/1000 Ethernet or web API
  • Up to 9 RS-232 serial ports
  • USB host with integrated 12-port hub, including 2 ports with standby power
  • Includes 48 GPIO pins with High, Low, Rising Edge, Falling Edge, Double Edge, or tachometer input modes and High, Low, or 12.5 kHz PWM output modes
  • ADC with eight channels
  • Dedicated I2C and SPI buses for off-board communications
  • Two input power options: 5 V, 3-pin, Micro-Fit connector; 6 V to 36 V, 2-pin Mini-Fit connector
  • Supports encryption keys on the FPGA


Download the E2S2 Product Brief.


Orderable Part Numbers:

  • E2S2 Ethernet to serial adapter

Other configurations are possible. Please contact us if you are interested in customizing a product to your specific requirements.

Orders may be placed via e-mail, telephone, fax, or mail.

Commercial Price List available upon request.

Phone: 520-519-3131
Fax: 520-519-3120
Mail: Rincon Research Corporation
Attention: Sales
101 North Wilmot Road, Suite 101
Tucson, AZ 85711

WARNING: Commodities, including associated software, firmware, and technical data, offered for sale on this site are controlled for export by the U.S. Department of State under the International Traffic in Arms Regulations (ITAR) or by the Department of Commerce under the Export Administration Regulations (EAR). Purchaser is required by U.S. law to comply with these regulations. Export, re-export, and retransfer of these commodities by any means without the required licenses or other U.S. Government authorization is prohibited by U.S. law.

Technical Specifications

Power Connectors

3-pin Micro-Fit (5 V), 2-pin Mini-Fit (6 V to 36 V)

Board Power

5 W (typ). Capable of supplying full power to all USB ports (an additional 30 W)


USB 2.0
8 USB type-A connectors, 4 JST connectors


9 JST 3-wire connectors






Up to 48 GPIO pins


12 bits, 8 channels, 125 kSPS, 0 V to 1 V voltage limit

Command and Control

10/100/1000 Ethernet, RJ45

Ethernet Switch

5 ports 10/100/1000 Ethernet, RJ45

Dimensions & Weight

3.876” x 3.876” (9.85 cm x 9.85 cm), 4.89 oz