Connective Peripherals ES-U Series User manual

Connective Peripherals Pte Ltd
178 Paya Lebar Road, #07-03 Singapore 409030
Tel.: [phone] Fax: [phone]
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 informat ion that
may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied b y 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

USB to Serial Converters Manual
Version 2.1
Document Reference No.: CP_000032 Clearance No.: CP#022
Copyright © Connective Peripherals Pte Ltd 2
Table of Contents
1Introduction.................................................................... 4
2Specifications.................................................................. 5
2.1 Standard Features .................................................................... 5
2.2 Features by Model..................................................................... 6
3Features of the ES-U-xxxx-x Family ................................ 7
3.1 USB and Serial Interface ........................................................... 7
3.2 Case Styles ............................................................................... 8
3.3 Power Supply............................................................................ 9
3.4 Optical Isolation & Surge Protection ....................................... 10
3.5 Configuring for RS-232, RS-422 and RS-485 Modes ................ 10
4Switch 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
5Connector 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 Signal Pin-out (Full Duplex) ....................................... 23
5.5 5V Power Output (ES-U-1002-M only) .................................... 24
6Driver Installation......................................................... 25
7Troubleshooting ............................................................ 26
7.1 Hardware ................................................................................ 26
7.2 Drivers .................................................................................... 27
8Contact Information...................................................... 28
Appendix A - List of Figures and Tables ............................. 29
List of Figures ................................................................................. 29
List of Tables ................................................................................... 29

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

USB to Serial Converters Manual
Version 2.1
Document Reference No.: CP_000032 Clearance No.: CP#022
Copyright © Connective Peripherals Pte Ltd 4
1Introduction
The ES-U-xxxx-x family of converters provide a quick and simple way to add serial communication ports
to your computer. They connect to a single USB port on your computer to instantly provide up to 32
serial ports. They take advantage of the plug-and-play and hot-plug features of the USB bus to make it
easier than ever to add communication ports to your system.
Installation is easy. There are no IRQ & COM port conflicts as the port doesn't require any additional IRQ,
DMA or memory resources on the system. Each RS-232 or RS-422/RS-485 port functions as a native
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 manual covers the following models:
USB to RS-232 converters
•Single channel (ES-U-1001-A, ES-U-1101-MB)
•Dual channel (ES-U-1002-A, ES-U-1002-M)
•8-channel (ES-U-1008B)
•32-channel (ES-U-1032-RM)
USB to RS-422/485 converters
•Single channel (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)

USB to Serial Converters Manual
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Document Reference No.: CP_000032 Clearance No.: CP#022
Copyright © Connective Peripherals Pte Ltd 5
2Specifications
2.1 Standard Features
•Internal Transmit and Receive buffers
•Requires no IRQ, DMA, I/O port
•DB-9 male serial connectors (terminal blocks on some models) (see Note 1)
•LEDs for each port indicate TxD and RxD
•Virtual COM port drivers available
oWindows 7 up to Windows 11
oMAC OSX 10.9 onwards
oLinux Kernel 3.0.0-19 onwards (e.g., Ubuntu version 11.10)
oOther legacy drivers available from the FTDI website
USB to RS-232 Features (available on ES-U-1xxx, ES-U-30xx and ES-U-2101-MB)
•Adds RS-232 ports via USB connection
•RS-232 data signals: DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI (see Note 2)
USB to RS-422/RS-485 Features (available on ES-U-20xx and ES-U-30xx) (see Note 3)
•Adds RS-422 / RS-485 ports via USB connection
•Auto transmit 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 individually isolated with 2000-volt DC optical isolation
•Each RS-232 or RS-422/RS-485 port is individually protected by a surge protector to withstand
electrostatic discharge and power surges up to 25KV ESD
Note 1 ES-U-1032-RM has RJ45 ports which can be converted to DB-9 male if required using the supplied cables
Note 2 Terminal block has subset of these signals only –see section Error! Reference source not found. for
details
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

USB to Serial Converters Manual
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Copyright © Connective Peripherals Pte Ltd 6
2.2 Features by Model
Table 1 summarises the features for each model in the ES-U-xxxx-x family.
Table 1 - Features of the ES-U-xxxx-x converters
Power supply types are USB (USB powered), Ext (external power adapter) or Int (internal power supply)
* 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.
Model Number
Serial Interfaces
Case
Power
Supply
Opto
Isolated
Additional features and
Notes
Ports
RS232
RS422
RS485
Metal
Rack
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
Y
-
-
USB
Y
Rev C of ES-U-2101
ES-U-2101-MB
1
Y
Y
Y
Y
-
USB
Y
6-way screw terminal
ES-U-2002-M
2
-
Y
Y
Y
-
USB
-
5-way screw terminals
ES-U-2102-M
2
-
Y
Y
Y
-
USB
Y
ES-U-2002-M with isolation
ES-U-2104-M
4
-
Y
Y
Y
-
Ext
Y
5VDC (2A) power adapter
(barrel plug) *
ES-U-2008-M
8
-
Y
Y
Y
-
Ext
-
12VDC (1.5A) power adapter
(3-pin terminal) *
ES-U-2016-RM
16
-
Y
Y
Y
Y
Int
-
ES-U-3001-MB
1
Y
Y
Y
Y
-
USB
-
6-way screw terminal, 5V
output
Rev B of ES-U-3001-M which
supports higher data
throughput
ES-U-3008-RM
8
Y
Y
Y
Y
Y
Int
-
ES-U-3008-RMB
8
Y
Y
Y
Y
Y
Ext
-
Rev B with external 5V PSU
ES-U-3016-RM
16
Y
Y
Y
Y
Y
Int
-

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Copyright © Connective Peripherals Pte Ltd 7
3Features of the ES-U-xxxx-x Family
3.1 USB and Serial Interface
USB Interface
Devices in the ES-U-xxxx-x series feature a standard USB type-B socket (with standard USB A-B cable
supplied to connect to the PC) or a USB type-A plug to connect to the USB port directly.
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 connectors if required.
Figure 1 - DB-9 Male serial connectors. Some models also feature terminal blocks
Figure 2 - ES-U-1032-RM (RJ45 connectors) is supplied with RJ45-to-DB-9 cables
ES-U-3008-RM
ES-U-2102-M
ES-U-1032-RM

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Copyright © Connective Peripherals Pte Ltd 8
3.2 Case Styles
The ES-U-xxxx-x converters are available in Plastic, Metal and Metal Rackmount enclosure styles. All
units can be used on a desktop with the self-adhesive feet provided.
•Plastic case desktop converters are supplied with USB cable (except ES-U-1001-A and ES-U-
1002-A) and a power adapter localised to country of sale (when required depending on model).
•Metal case converters are supplied with wall mounting hardware, USB cable and power 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 power LED is also included (on units
with metal enclosures) to show that the converter is receiving power.
Note that enclosure colour may vary from the photos shown. Some models with metal enclosures are
changing to a black colour
Figure 3 - Example of the Metal Rack-mount enclosure
Figure 4 - Examples of the Plastic and Metal (wall mountable) enclosures
ES-U-1016-RM
ES-U-1008B
ES-U-2102-M

USB to Serial Converters Manual
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Copyright © Connective Peripherals Pte Ltd 9
3.3 Power Supply
Depending on the model, power will either be supplied from the USB port, from an external power
adapter or from an internal switching supply. The different types are described below. Table 1 on page 6
shows which type of power supply is required for each converter model.
USB powered
These devices are powered directly from the USB port. No power supply is required for these converters.
It is recommended to connect them direct to a PC’s USB port. If necessary to use a USB hub, it is
strongly recommended to use a self-powered hub (which has its own PSU) as bus-powered hubs may not
be able to provide sufficient power.
Power Adapter
These devices are provided with an external power adapter in the package. The adapter supplied has a
UK, EU or USA plug depending on the country of sale and so may vary from the one shown below. The
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 converter; damage will occur if an
adapter providing the wrong voltage is used and is not covered by the warranty.
Figure 5 - Some models use a power adapter with barrel or terminal connector
The revision B of the rack-mountable units now also have external power supplies and use the connector
shown in Figure 6.
Figure 6 –ES-U-3008-RMB power connector
Internal Switching Power Supply
The rack mountable (ES-U-xxxx-RM) devices require an AC input (100V ~ 240V, 47 –63 Hz) for the
internal switching 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.
Barrel Plug
connector
Terminal
Block
connector
ES-U-2108-M
ES-U-2008-M

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Copyright © Connective Peripherals Pte Ltd 10
Note that the revision B rack-mountable units (such as ES-U-3008-RMB) now have an external power
supply instead of the internal power supply, and uses the connector shown in the Power Adapter section
above in Figure 6.
Figure 7 - Rack-mount model with an internal supply with AC input connector
3.4 Optical Isolation & Surge Protection
Optical isolation and surge protection are available in the ES-U-11xx and ES-U-21xx converters.
Each serial port is individually optically isolated with 2000-volt DC optical isolation. The optical isolation
protects your PC or notebook from spikes and surges on the 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-485 Modes
The ES-U-2xxx-x and ES-U-3xxx-x converters can be configured for different interface types. These
converters have DIP switches or internal jumpers to select the required interface. They also feature
internal jumpers to select options such as termination and biasing of the RS-422 and RS-485 lines.
Please refer to section 4 for more information on the DIP switch and jumper settings available on each
model of converter.
Figure 8 - ES-U-2xxx and ES-U-3xxx have DIP switches to select the serial mode
ES-U-2016-RM
ES-U-3008-RM