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Connective Peripherals Pte Ltd 

178 Paya Lebar Road, #07-03 Singapore 409030 

Tel.: +65 67430980    Fax: +65 68416071 

E-Mail (Support): 

[email protected]

  Web

www.connectiveperipherals.com/products

 

 

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 information 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 

 

Copyright © Connective Peripherals Pte Ltd 

 

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-1032-RM  

ES-U-2002-M  

ES-U-2101-MB 

 

ES-U-1101-MB 

ES-U-2001B 

ES-U-2102-M 

ES-U-3001-MB 

ES-U-1002-A  

ES-U-2101B 

ES-U-2104-M  

ES-U-3008-RM 

ES-U-1002-M  

ES-U-2001C 

ES-U-2008-M 

ES-U-3008-RMB 

ES-U-1008B 

ES-U-2101C 

ES-U-2016-RM 

ES-U-3016-RM 

 

 

 

Connective Peripherals Pte Ltd 

USB to Serial Converters Manual 

Document Reference No.: CP_000032  

Version 2.1 

Issue Date: 01-04-2022

 

 

Summary of Contents for ES-U Series

Page 1: ...d 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 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 trus...

Page 2: ...4 Switch and Jumper Settings 12 4 1 General Notes and Warnings 12 4 2 ES U 2x01B ES U 2x01C Adapters Plastic Enclosure 13 4 3 ES U 2xxx M and ES U 2xxx RM with 3 DIP Switches 14 4 4 ES U 2xxx M with 4 DIP Switches 15 4 5 ES U 3xxx x and ES U 2101 MB 16 5 Connector Pinout Information 18 5 1 RS 232 Signal Pin out 18 5 2 RS 422 Signal Pin out 19 5 3 RS 485 Signal Pin out Half Duplex 21 5 4 RS 485 Sig...

Page 3: ...USB to Serial Converters Manual Version 2 1 Document Reference No CP_000032 Clearance No CP 022 Copyright Connective Peripherals Pte Ltd 3 Appendix B Revision History 31 ...

Page 4: ...ative Windows COM port and is compatible with Windows serial communication applications The ES U xxxx x converters provide instant connectivity to RS 232 or RS 422 RS 485 compatible devices including factory automation equipment multi drop data collection devices barcode readers time clocks point of sale scales data entry terminals and a variety of other devices in industrial environments This man...

Page 5: ...ransmit buffer control for 2 wire RS 485 half duplex operation Internal termination and bias resistors on some models enabled by jumper RS 422 data signals TX TX RX RX GND RTS RTS CTS CTS see Note 2 RS 485 signals half duplex Data Data GND RS 485 signals full duplex TX TX RX RX GND Additional Opto isolation Features available on ES U 11xx and ES U 21xx Each RS 232 or RS 422 RS 485 port is individu...

Page 6: ...ack ES U 1001 A 1 Y USB ES U 1101 MB 1 Y Y USB Y Revision B of ES U 1101 M which supports higher data throughput ES U 1002 A 2 Y USB ES U 1002 M 2 Y Y USB 5V 150mA output on 2 way screw terminal ES U 1008B 8 Y USB ES U 1032 RM 32 Y Y Y Int RJ45 serial connectors ES U 2001B 1 Y Y USB Rev B of ES U 2001 ES U 2001C 1 Y Y USB Rev C of ES U 2001 ES U 2101B 1 Y Y USB Y Rev B of ES U 2101 ES U 2101C 1 Y ...

Page 7: ... Serial Interface The ES U xxxx x converters have DB 9 male connectors for connection to the RS 232 422 485 interface Some models have the following additional features Terminal block connections providing a subset of the signals Optional 5V output The ES U 1032 RM unit has RJ45 connectors on the front panel instead of DB 9 but is provided with adapter cables to convert these to DB 9 male connecto...

Page 8: ...wer adapter with plug localised to country of sale when required depending on model Metal rack mount converters are supplied with rack mounting hardware USB cable and power cable or power adapter localised to country of sale Transmit and receive LEDs for each port are included on the front or top panel of the enclosure to show when data is being transmitted or received by the associated port A pow...

Page 9: ... low voltage connector is either a 3 pin terminal block connector or a barrel type jack as shown below depending on the model For more details see Table 1 on page 6 The low voltage cable should be connected to the power or DC in socket on the converter and the AC input plug should be connected to a power source before using the converter Always use the supplied adapter to power your ES U xxxx x co...

Page 10: ...he RS 232 or RS 422 RS 485 network by converting the electrical data into an optical signal and then changing it back into electrical data Your computer is well protected since the surges and spikes cannot cross the optical link Each serial port is individually protected by surge protector to withstand electrostatic discharge and power surges up to 25KV ESD 3 5 Configuring for RS 232 RS 422 and RS...

Page 11: ...o Serial Converters Manual Version 2 1 Document Reference No CP_000032 Clearance No CP 022 Copyright Connective Peripherals Pte Ltd 11 Figure 9 ES U 3008 RM has a set of jumpers for each port one set circled ...

Page 12: ... settings and before opening the case to change jumper settings Termination For RS 422 or RS 485 it may be necessary to enable termination of the data transmission lines This depends on the way in which your network is connected and if termination is already provided by other devices on the network Before applying the termination check your cable specification for proper impedance matching The ter...

Page 13: ...and ES U 2101 please refer to version 1 4 of this guide which is available from the Connective Peripherals website This section does not apply to ES U 2xxx M metal case adapters Please see sections 4 3 and 4 4 for these products See the General Notes and Warnings on page 12 before changing settings or opening the cover The jumpers should be set to select the correct serial mode before connecting t...

Page 14: ... the jumpers as required See the notes on Termination in section 4 1 before setting these options Note on Biasing For RS485 half duplex if biasing is required enable Tx biasing only jumper 4 5 and 7 8 and disable Rx biasing jumper 14 15 and 17 18 For RS485 full duplex and RS422 biasing can be enabled disabled for Tx and Rx pairs independently as required See the notes on Biasing in section 4 1 bef...

Page 15: ...e enabled as the Tx and Rx lines are linked Enable Tx termination jumper 1 2 and disable Rx termination leave jumper 7 8 open For RS485 full duplex and RS422 termination can be enabled disabled for Tx and Rx pairs independently using the jumpers as required See the notes on Termination in section 4 1 before setting these options Note on Biasing For RS485 half duplex if biasing is required enable T...

Page 16: ...ation and Biasing Note on Termination For RS485 half duplex if termination is required only Tx Termination should be enabled as the Tx and Rx lines are linked Enable Tx termination using DIP switch 4 on this model and disable Rx termination leave jumper 5 6 open For RS485 full duplex and RS422 termination can be enabled disabled for Tx and Rx pairs independently using the jumpers as required See t...

Page 17: ...mpers to select Termination and Biasing Note on Termination For RS485 half duplex if termination is required only Tx Termination should be enabled as the Tx and Rx lines are linked Enable Tx termination jumper 1 2 and disable Rx termination leave jumper 7 8 open For RS485 full duplex and RS422 termination can be enabled disabled for Tx and Rx pairs independently using the jumpers as required See t...

Page 18: ...ady 5 Ground GND RS232 signal ground 6 Input DSR Data Set Ready 7 Output RTS Request To Send 8 Input CTS Clear To Send 9 Input RI Ring Indicator Shield Case Ground Drain typically connected to the host PC case Table 11 RS 232 Pin Out for DB 9 connector RS232 DB 9 Pin Out ES U 2101 MB The ES U 2101 MB has a reduced set of signals which are shown in Table 12 It includes the most used signals TxD RxD...

Page 19: ...ion B an RS232 mode has been added On the terminal block only the TxD and RxD signals are available in addition to the GND and an optional 5V output The other terminals must be left unconnected Pin Number Pin Type Description 1 Leave un connected 2 Input RXD Receive Data 3 Output TXD Transmit Data 4 Leave un connected 5 Power For ES U 2101 MB pin 5 is optional 5VDC output 6 Ground GND Signal groun...

Page 20: ...ay terminal block only available on some models Pin Number Pin Type Description 1 Output TxD Transmit data negative polarity 2 Output TxD Transmit data positive polarity 3 Input RxD Receive data positive polarity 4 Input RxD Receive data negative polarity 5 See Description For ES U 2101 M pin 5 is GND For ES U 3001 MB pin 5 is optional 5VDC output For ES U 2101 MB pin 5 is optional 5VDC output 6 G...

Page 21: ...in Number Pin Type Description 1 Out In Data Transmit Receive Data negative polarity 2 Out In Data Transmit Receive Data positive polarity 5 Ground GND Signal ground Shield Case Ground Drain typically connected to the host PC case Table 18 RS 485 Half Duplex Pin out for DB 9 Connector Note Other pins have no function in this mode and should be left un connected 5 way Terminal Block Table 19 shows ...

Page 22: ...mode and should be left un connected Wiring Diagrams Figure 14 shows an ES U xxxx x converter connected to an RS 485 half duplex bus If the ES U xxxx x is at one end of the bus as shown the built in resistor can be enabled to terminate the Data lines The Tx termination jumper or DIP switch is used to enable this resistor A second termination resistor is fitted at the other end of the bus as shown ...

Page 23: ... the RS 485 full duplex pinout of the 5 way terminal block only available on some models Pin Number Pin Type Description 1 Output TxD Transmit data negative polarity 2 Output TxD Transmit data positive polarity 3 Input RxD Receive data positive polarity 4 Input RxD Receive data negative polarity 5 Ground GND Signal ground Table 22 RS 485 Full Duplex Pin out for Terminal Block 6 way Terminal Block ...

Page 24: ...e terminated at the receiver at the other end of the bus as shown Twisted pair wires are required for each signal pair Figure 15 RS 485 Full Duplex Wiring 5 5 5V Power Output ES U 1002 M only 2 way Terminal Block Table 24 shows the pin out of the 2 way terminal block on the ES U 1002 M converter This provides 5V at up to 150mA for external devices This power is supplied by the USB port of the comp...

Page 25: ...0032 Clearance No CP 022 Copyright Connective Peripherals Pte Ltd 25 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 ...

Page 26: ...rter requires an external power supply ensure that the power supply is securely connected to both the power input socket on the converter and the AC power outlet If your converter has an internal power supply ensure that the power cable is securely connected to both the power inlet socket on the rear panel of the converter and the AC power outlet RS 232 Connections On converters supporting multipl...

Page 27: ... on your RS 422 RS 485 network and how they are connected If your application is receiving additional unexpected zero bytes the biasing resistors can be enabled to resolve this Section 4 gives details of how to enable the biasing resistors for each model of converter Note that some ES U xxxx do not have internal biasing resistors and so these would need to be fitted externally Some application pro...

Page 28: ...ontact 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 ...

Page 29: ...2 with Handshaking Signals Connected 21 Figure 14 RS 485 Half Duplex Wiring 22 Figure 15 RS 485 Full Duplex Wiring 24 List of Tables Table 1 Features of the ES U xxxx x converters 6 Table 2 RS 422 RS 485 Mode Configuration 13 Table 3 Jumpers to select Termination and Biasing 14 Table 4 RS 422 RS 485 Mode Configuration 14 Table 5 Jumpers to select Termination and Biasing 15 Table 6 RS 422 RS 485 Mo...

Page 30: ...00032 Clearance No CP 022 Copyright Connective Peripherals Pte Ltd 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 ...

Page 31: ...23 08 2011 1 3 Re branding to reflect the migration of the product from EasySync to Connective Peripherals name logo change copyright changed contact information Changed all internal hyperlinks changed 20 03 2019 1 4 The following part number have been updated ES U 2101B to ES U 2101C ES U 3001 M to ES U 3001 MB ES U 1101 M to ES U 1101 MB Updated Figure 10 Driver Download from FTDI Website 29 04 ...

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