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Connective Peripherals Pte Ltd
USB to Serial Converters Manual
The ES-U-xxxx-x adapters are a series of USB Serial Converters from Connective Peripherals Pte
Ltd. They provide a simple method of adapting legacy RS-232 or RS-422/485 devices to work
with modern USB ports using a trusted and reliable FTDI chip set. Available in a variety of
enclosures and port numbers, they are ideal for allowing factory automation equipment, multi-
drop data collection devices, barcode readers, time clocks, scales, data entry terminals and
serial communication equipment to be connected to USB ports in industrial environments.
This manual covers the following USB to Serial Converter products. For older products from the
ES-U-xxxx-xx series please refer to the earlier version 1.4 of this manual available from the
Connective Peripherals website.
ES-U-1001-A
ES-U-1101-MB
ES-U-1002-A
ES-U-1002-M
ES-U-1008B
E-Mail (Support):
support@connectiveperipherals.com
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted, or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Connective
Peripherals Pte Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Your statutory
rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device, or system in which the
failure of the product might reasonably be expected to result in personal injury. This document provides preliminary informat ion that
may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by the publication of
this document. Connective Peripherals Pte Ltd, 178 Paya Lebar Road, #07-03 Singapore 409030. Registered Number: 201617872E
Document Reference No.: CP_000032
Version 2.1
Issue Date: 01-04-2022
ES-U-1032-RM
ES-U-2001B
ES-U-2101B
ES-U-2001C
ES-U-2101C
Connective Peripherals Pte Ltd
178 Paya Lebar Road, #07-03 Singapore 409030
Tel.: +65 67430980
Copyright © Connective Peripherals Pte Ltd
ES-U-2002-M
ES-U-2102-M
ES-U-2104-M
ES-U-2008-M
ES-U-2016-RM
Fax: +65 68416071
Web:
www.connectiveperipherals.com/products
ES-U-2101-MB
ES-U-3001-MB
ES-U-3008-RM
ES-U-3008-RMB
ES-U-3016-RM

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Summary of Contents for Connective Peripherals ES-U Series

  • Page 1 No freedom to use patents or other intellectual property rights is implied by the publication of this document. Connective Peripherals Pte Ltd, 178 Paya Lebar Road, #07-03 Singapore 409030. Registered Number: 201617872E Copyright © Connective Peripherals Pte Ltd...
  • Page 2: Table Of Contents

    7 Troubleshooting ............26 Hardware ................26 Drivers ..................27 8 Contact Information ............28 Appendix A - List of Figures and Tables ......29 List of Figures ................. 29 List of Tables ................... 29 Copyright © Connective Peripherals Pte Ltd...
  • Page 3 USB to Serial Converters Manual Version 2.1 Document Reference No.: CP_000032 Clearance No.: CP#022 Appendix B - Revision History ..........31 Copyright © Connective Peripherals Pte Ltd...
  • Page 4: Introduction

    (ES-U-2001B, ES-U-2101B, ES-U-2001C, ES-U-2101C) • Dual channel (ES-U-2002-M, ES-U-2102-M) • Quad channel (ES-U-2104-M) • 8-channel (ES-U-2008-M) • 16-channel (ES-U-2016-RM) USB to RS-232/422/485 converters • Single channel (ES-U-3001-MB, ES-U-2101-MB) • 8-channel (ES-U-3008-RM, ES-U-3008-RMB) • 16-channel (ES-U-3016-RM) Copyright © Connective Peripherals Pte Ltd...
  • Page 5: Specifications

    ES-U-2101-MB also features RS232 but only a subset of these signals – see section Error! Reference source not found. for details Note 3 Supports multiple serial protocols - Jumpers or DIP switches are used to select the required serial protocol Copyright © Connective Peripherals Pte Ltd...
  • Page 6: Features By Model

    * Power adapter voltages and currents shown in the comments column is for indication only and are subject to change. To avoid damage, always use the adapter which was provided with your converter to ensure that you are supplying the correct voltage for operation. Copyright © Connective Peripherals Pte Ltd...
  • Page 7: Features Of The Es-U-Xxxx-X Family

    DB-9 male connectors if required. ES-U-3008-RM ES-U-2102-M Figure 1 - DB-9 Male serial connectors. Some models also feature terminal blocks ES-U-1032-RM Figure 2 - ES-U-1032-RM (RJ45 connectors) is supplied with RJ45-to-DB-9 cables Copyright © Connective Peripherals Pte Ltd...
  • Page 8: Case Styles

    Note that enclosure colour may vary from the photos shown. Some models with metal enclosures are changing to a black colour ES-U-1016-RM Figure 3 - Example of the Metal Rack-mount enclosure ES-U-1008B ES-U-2102-M Figure 4 - Examples of the Plastic and Metal (wall mountable) enclosures Copyright © Connective Peripherals Pte Ltd...
  • Page 9: Power Supply

    A power cable is supplied with the converter and connects to the power inlet socket on the rear panel. The cable has a UK, EU or USA plug depending on the country of sale and so may vary from the one shown below. Copyright © Connective Peripherals Pte Ltd...
  • Page 10: Optical Isolation & Surge Protection

    Please refer to section 4 for more information on the DIP switch and jumper settings available on each model of converter. ES-U-3008-RM Figure 8 - ES-U-2xxx and ES-U-3xxx have DIP switches to select the serial mode Copyright © Connective Peripherals Pte Ltd...
  • Page 11 USB to Serial Converters Manual Version 2.1 Document Reference No.: CP_000032 Clearance No.: CP#022 Figure 9 - ES-U-3008-RM has a set of jumpers for each port (one set circled) Copyright © Connective Peripherals Pte Ltd...
  • Page 12: Switch And Jumper Settings

    750 Ohm resistors pull up the Data + line and pull down the Data – line. Some ES-U-xxxx-x models feature internal 750-ohm resistors with jumpers to enable/disable them. Copyright © Connective Peripherals Pte Ltd...
  • Page 13: U-2X01B / Es-U-2X01C Adapters (Plastic Enclosure)

    5 – 6 Disable Pull-up of Tx+ to VCC 7 – 8 Enable Pull-down of Tx- to GND by 750 Ohm Bias resistor (see notes below table) 8 – 9 Disable Pull-down of Tx- to GND Copyright © Connective Peripherals Pte Ltd...
  • Page 14: U-2Xxx-M And Es-U-2Xxx-Rm With 3 Dip Switches

    (RS-422 or RS-485). Operation Mode RS-422 4 Wire with handshaking Full Duplex (4 wire) RS-485 Half Duplex (2 wire) with Echo Half Duplex (2 wire) without Echo Table 4 - RS-422 & RS-485 Mode Configuration Copyright © Connective Peripherals Pte Ltd...
  • Page 15: U-2Xxx-M With 4 Dip Switches

    (RS-422 or RS-485). Operation Mode RS-422 4 Wire with handshaking Full Duplex (4 wire) RS-485 Half Duplex (2 wire) with Echo Half Duplex (2 wire) without Echo Table 6 - RS-422 & RS-485 Mode Configuration Copyright © Connective Peripherals Pte Ltd...
  • Page 16: U-3Xxx-X And Es-U-2101-Mb

    RS-232/RS-422/RS-485 serial bus. DIP Switch Settings On the outside of the unit, there are four DIP switches, which are used to select the required serial mode (RS-232, RS-422 or RS-485). Operation Mode RS-232 Copyright © Connective Peripherals Pte Ltd...
  • Page 17: Table 8 - Rs-232, Rs-422 & Rs-485 Mode Configuration

    Table 10 - Jumper to select 5V output RS232 Pin-Out (ES-U-2101-MB) The ES-U-2101-MB has only a subset of the signals on the DB-9 connector to provide TxD, RxD, RTS, CTS and GND. The pinout can be found in Table 12. Copyright © Connective Peripherals Pte Ltd...
  • Page 18: Connector Pinout Information

    Input CTS = Clear To Send Leave un-connected Table 12 - RS-232 Pin-Out for DB-9 connector on ES-U-2101-MB RJ45 connector Table 13 shows the pin-out of the RJ45 connectors used on the ES-U-1032-RM converter. Copyright © Connective Peripherals Pte Ltd...
  • Page 19: Rs-422 Signal Pin-Out

    GND = Signal ground Output RTS- = Request to send, negative polarity Output RTS+ = Request to send, positive polarity Input CTS+ = Clear to send, positive polarity Input CTS- = Clear to send, negative polarity Copyright © Connective Peripherals Pte Ltd...
  • Page 20: Table 15 - Rs-422 Pin-Out For Db-9 Connector

    Twisted pair wires are required for each signal pair. ES-U-xxxx-x RS-422 Device TxD+ RxD+ TxD- RxD- RxD+ TxD+ RxD- TxD- Figure 12 - RS-422 4 Wire Full Duplex Copyright © Connective Peripherals Pte Ltd...
  • Page 21: Rs-485 Signal Pin-Out (Half Duplex)

    Data+ = Transmit / Receive Data, positive polarity Ground GND = Signal ground Table 19 - RS-485 Half-Duplex Pin-Out for 5-way Terminal Block Note: Other terminals have no function in this mode and should be left un-connected. Copyright © Connective Peripherals Pte Ltd...
  • Page 22: Table 20 - Rs-485 Half-Duplex Pin-Out For 6-Way Terminal Block

    Tx- to GND jumpers. These should not be enabled if another device on the bus is already providing biasing. Twisted pair wires are required for each signal pair. ES-U-xxxx-x RS-485 Devices Data+ Data- Data+ Data- Data+ Data- Data+ Data- Figure 14 - RS-485 Half Duplex Wiring Copyright © Connective Peripherals Pte Ltd...
  • Page 23: Rs-485 Signal Pin-Out (Full Duplex)

    For ES-U-2101-M, pin 5 is GND For ES-U-3001-MB, pin 5 is optional 5VDC output Description For ES-U-2101-MB, pin 5 is optional 5VDC output Ground GND = Signal ground Table 23 - RS-485 Full Duplex Pin-out for Terminal Block Copyright © Connective Peripherals Pte Ltd...
  • Page 24: Power Output (Es-U-1002-M Only)

    150mA for external devices. This power is supplied by the USB port of the computer. Pin Number Pin Type Description Output 5V output at up to 150mA Ground Ground Table 24- 5V Power Output Copyright © Connective Peripherals Pte Ltd...
  • Page 25: Driver Installation

    Version 2.1 Document Reference No.: CP_000032 Clearance No.: CP#022 6 Driver Installation For driver installation, please refer to the Connective Peripherals USB to Serial Converters Driver Installation Guide (CP_000084) which is available from www.connectiveperipherals.com Copyright © Connective Peripherals Pte Ltd...
  • Page 26: Troubleshooting

    This section provides some advice to help if you encounter problems during installation or use of your converter. Please check these items before contacting Connective Peripherals technical support. If you still have problems, you can contact technical support using the contact details in section 8.
  • Page 27: Drivers

    RS-485 mode without Echo on each model of converter. 7.2 Drivers Troubleshooting advice for drivers can be found in the Connective Peripherals USB to Serial Converters Driver Installation Guide (CP_000084) which is available from www.connectiveperipherals.com...
  • Page 28: Contact Information

    Global Headquarters – Singapore Connective Peripherals Pte Ltd 178 Paya Lebar Road #07-03 Singapore 409030 Tel: +65 67430980 Fax: +65 68416071 E-Mail (Sales) sales@connectiveperipherals.com E-Mail (Support) support@connectiveperipherals.com Web Site URL http://www.connectiveperipherals.com Web Shop URL http://www.connectiveperipherals.com Copyright © Connective Peripherals Pte Ltd...
  • Page 29: Appendix A - List Of Figures And Tables

    Table 18 - RS-485 Half-Duplex Pin-out for DB-9 Connector .............. 21 Table 19 - RS-485 Half-Duplex Pin-Out for 5-way Terminal Block ............. 21 Table 20 - RS-485 Half-Duplex Pin-out for 6-way Terminal Block ............22 Copyright © Connective Peripherals Pte Ltd...
  • Page 30 Table 21 - RS-485 Full Duplex Pin-out for DB-9 Connector ............... 23 Table 22 - RS-485 Full Duplex Pin-out for Terminal Block ..............23 Table 23 - RS-485 Full Duplex Pin-out for Terminal Block ..............23 Table 24- 5V Power Output ......................24 Copyright © Connective Peripherals Pte Ltd...
  • Page 31 23-08-2011 Recommend setting Rx biasing only when using RS- 485 half-duplex Re-branding to reflect the migration of the product from EasySync to Connective Peripherals name – logo 20-03-2019 change, copyright changed, contact information Changed, all internal hyperlinks changed. The following part number have been updated -...

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