Icp TDS-725I, TDSM-712, TDS735I, TDS-734I, TDS-734 User Manual

tDS-700 Series

W

to the use of this product. ICP DAS reserves the right

information furnished by ICP DAS is believed to be

accurate and reliable. However, no responsibility is

assumed by ICP DAS for its use, nor for any

infringements of patents or other rights of third

may be registered trademarks of their respective

If you have any questions, please feel free to contact

S

User Manual

Tiny Serial-to-Ethernet Device Server Aug. 2018, Ver. 2.2

ARRANTY

All products manufactured by ICP DAS are warranted

against defective materials for a period of one year

from the date of delivery to the original purchaser.

WARNING

ICP DAS assumes no liability for damages consequent

to change this manual at any time without notice. The

UPPORT

This manual relates to the following modules:

tDS-712, tDS-722, tDS-732

tDS-715, tDS-725, tDS735

tDS-718, tDS-724, tDS-734

tDS-712i, tDS-722i, tDS-732i

tDS-715i, tDS-725i, tDS735i

tDS-718i, tDS-724i, tDS-734i

tDSM-712, tDS-718i-D

parties resulting from its use.

COPYRIGHT

Copyright © 2018 by ICP DAS. All rights are reserved.

TRADEMARKS

Names are used for identification purposes only and

companies.

CONTACT US

us via email at:

[e-mail], [e-mail]

Tiny Serial-to-Ethernet Device Server

TABLE OF CONTENTS

PACKING LIST............................................................................................................................................................. 5

MORE INFORMATION ................................................................................................................................................ 5

1. INTRODUCTION ................................................................................................................................................ 6

1.1 ETHERNET SOLUTIONS .......................................................................................................................................... 8

1.2 VXCOMM TECHNOLOGY ......................................................................................................................................... 9

1.3 WEB SERVER TECHNOLOGY ................................................................................................................................. 11

2. HARDWARE INFORMATION .......................................................................................................................... 12

2.1 SPECIFICATIONS ................................................................................................................................................. 12

2.2 FEATURES .......................................................................................................................................................... 13

2.3 APPEARANCE ..................................................................................................................................................... 14

PoE and Ethernet RJ-45 Jack .................................................................................................................................... 14

+12 to +48 VDC Jack ................................................................................................................................................. 14

Operating Mode Switch ............................................................................................................................................ 15

LED Indicator ........................................................................................................................................................... 15

Serial COM Ports ....................................................................................................................................................... 16

DIN-Rail Mounting ................................................................................................................................................... 16

2.4 DIMENSIONS ...................................................................................................................................................... 17

2.4.1 tDS-700 Series Module ..................................................................................................................................... 17

2.4.2CA-002 Cable ..................................................................................................................................................... 19

2.5 PIN ASSIGNMENTS .............................................................................................................................................. 20

tDS-712/tDS-712i/tDSM-712 .................................................................................................................................. 20

tDS-722/tDS-722i ..................................................................................................................................................... 20

tDS-732/tDS-732i ..................................................................................................................................................... 21

tDS-715/tDS-715i ..................................................................................................................................................... 21

tDS-725/tDS-725i ..................................................................................................................................................... 22

tDS-735/tDS-735i ..................................................................................................................................................... 22

tDS-718/tDS-718i ..................................................................................................................................................... 23

tDS-718i-D ................................................................................................................................................................ 23

tDS-724/tDS-724i ..................................................................................................................................................... 24

tDS-734/tDS-734i ..................................................................................................................................................... 24

2.6 WIRING NOTES FOR RS-232/485/422 INTERFACES ........................................................................................... 25

RS-232 Wiring .......................................................................................................................................................... 25

RS-422 Wiring .......................................................................................................................................................... 26

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -2 -

Tiny Serial-to-Ethernet Device Server

RS-485 Wiring .......................................................................................................................................................... 26

3. GETTING STARTED ......................................................................................................................................... 27

3.1 CONNECTING THE POWER AND HOST PC .............................................................................................................. 27

3.2 INSTALL THE VXCOMM UTILITY ........................................................................................................................... 30

3.3 CONFIGURING NETWORK SETTINGS ...................................................................................................................... 30

3.4 CONFIGURING THE VIRTUAL COM PORTS ............................................................................................................. 31

3.5 CONFIGURING THE SERIAL PORT .......................................................................................................................... 33

3.6 TESTING YOUR TDS-700 .................................................................................................................................... 35

4. WEB CONFIGURATION ................................................................................................................................... 37

4.1 LOGGING IN TO THE TDS-700 WEB SERVER ......................................................................................................... 37

4.2 HOME PAGE ....................................................................................................................................................... 39

4.3 NETWORK SETTING ............................................................................................................................................ 40

4.3.1 IP Address Settings ..................................................................................................................................... 40

4.3.2 General Settings ......................................................................................................................................... 43

4.3.3 Restore Factory Defaults ............................................................................................................................ 45

4.3.4 Remote Firmware Update .......................................................................................................................... 47

4.4 SERIAL PORT PAGE ............................................................................................................................................. 48

4.4.1 Port1 Settings ............................................................................................................................................. 48

4.5 FILTER PAGE ...................................................................................................................................................... 51

4.5.1 Accessible IP (filter is disabled when all zero) .......................................................................................... 51

4.6 MONITOR PAGE .................................................................................................................................................. 52

4.7 CHANGE PASSWORD............................................................................................................................................ 53

4.8 LOGOUT PAGE .................................................................................................................................................... 54

5. TYPICAL APPLICATIONS ................................................................................................................................ 55

5.1 VIRTUAL COM APPLICATION ............................................................................................................................... 56

5.2 DIRECT SOCKET CONNECTION APPLICATIONS ........................................................................................................ 57

5.3 ETHERNET I/O APPLICATIONS ............................................................................................................................ 60

5.4 PAIR-CONNECTION APPLICATIONS........................................................................................................................ 62

5.5 TCP CLIENT MODE APPLICATIONS ....................................................................................................................... 69

6. GI CONFIGURATION ........................................................................................................................................ 76

6.1 CGI URL SYNTAX ............................................................................................................................................... 76

6.2 CGI COMMAND LIST ........................................................................................................................................... 77

APPENDIX A: TROUBLESHOOTING ........................................................................................................................ 79

A1. HOW DO I RESTORE THE WEB PASSWORD FOR THE MODULE TO THE FACTORY DEFAULT PASSWORD? .............................................. 79

APPENDIX B: GLOSSARY ......................................................................................................................................... 81

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -3 -

Tiny Serial-to-Ethernet Device Server

1. ARP (ADDRESS RESOLUTION PROTOCOL) ..................................................................................................................... 81

2. CLIENTS AND SERVERS ............................................................................................................................................... 81

3. ETHERNET ................................................................................................................................................................ 82

4. FIRMWARE .............................................................................................................................................................. 82

5. GATEWAY ................................................................................................................................................................ 82

6. ICMP (INTERNET CONTROL MESSAGE PROTOCOL) ......................................................................................................... 82

7. INTERNET ................................................................................................................................................................ 82

8. IP (INTERNET PROTOCOL) ADDRESS ............................................................................................................................. 83

9. MAC (MEDIA ACCESS CONTROL) ADDRESS .................................................................................................................. 83

10. PACKET .............................................................................................................................................................. 83

11. PING .................................................................................................................................................................. 83

12. RARP (REVERSE ADDRESS RESOLUTION PROTOCOL) ................................................................................................. 83

13. SOCKET .............................................................................................................................................................. 84

14. SUBNET MASK ..................................................................................................................................................... 84

15. TCP (TRANSMISSION CONTROL PROTOCOL) ............................................................................................................. 84

16. TCP/IP .............................................................................................................................................................. 84

17. UDP (USER DATAGRAM PROTOCOL) ...................................................................................................................... 84

APPENDIX C: ACTUAL BAUD RATE MEASUREMENT ............................................................................................ 85

APPENDIX D: REVISION HISTORY .......................................................................................................................... 86

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -4 -

Tiny Serial-to-Ethernet Device Server

tDS-700/tDSM-700 Series

Quick Start

Or

Packing List

The shipping package includes the following items:

Note

If any of these items are missing or damaged, please contact the local distributor for more information. Save the
shipping materials and cartons in case you need to ship the module in the future.

CA-002 Cable

More Information

 Documentation

http://ftp.icpdas.com/pub/cd/tinymodules/napdos/tds-700/document/

 Firmware

http://ftp.icpdas.com/pub/cd/tinymodules/napdos/tds-700/firmware/

 Software

http://ftp.icpdas.com/pub/cd/tinymodules/napdos/software/

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -5 -

Tiny Serial-to-Ethernet Device Server

1. Introduction

The tDS-700 is a series of Serial-to-Ethernet device servers that are

designed to add Ethernet and Internet connectivity to any RS-232

and RS-422/485 device, and to eliminate the cable length limitation

of legacy serial communications. By using the VxComm

Driver/Utility, the built-in COM Port of the tDS-700 series can be

virtualized to a standard PC COM Port in Windows. Therefore,

users can transparently access or monitor serial devices over the

Internet/Ethernet without the need for software modification.

tDS-700 device servers can be used to create a pair-connection application (as well as serial-bridge

or serial-tunnel), and then route data between two serial devices via TCP/IP. This is useful when

connecting mainframe computers, servers or other serial devices that do not themselves have

Ethernet capability. By virtue of its protocol independence and flexibility, the tDS-700 meets the

demands of virtually any network-enabled application.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -6 -

Tiny Serial-to-Ethernet Device Server

Features

In harsh industrial environments, the tDS-700 series (for i version) also adds 3000 VDC and +/- 4 kV

ESD protection component that diverts the potentially damaging charge away from sensitive circuit

to protects the module and equipment from the sudden and momentary electric current.

To achieve maximum space savings, the tDS-700 is offered in an amazingly small form-factor that

enables it to be easily installed anywhere, even directly attached to a serial device or embedded

into a machine. The tDS-700 features a powerful 32-bit MCU that allows it to efficiently handle

network traffic. The tDS-700 offers true IEEE 802.3af-compliant (classification, Class 1) Power-over-

Ethernet (PoE) functionality using a standard category 5 Ethernet cable that allows it to receive

power from a PoE switch such as the NS-205PSE. If there is no PoE switch available on site, the tDS-

700 can accepts power input from a DC adapter.

Comparison of Device Servers:

Series

Virtual COM

Programmable

PoE

Modbus Gateway

Multi-client

Remarks

PPDS PDS DS tDS tGW

   

 





Professional Powerful

-

- - -

- -

- - -

About 20 Sockets 1 Sockets/Port 10 Sockets/Port

Isolation for

DS-715

 

Cost-effective,

Entry-level



Cost-effective,

Entry-level

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -7 -

Tiny Serial-to-Ethernet Device Server

1.1 Ethernet Solutions

Nowadays, the Ethernet protocol has become the foremost standard for local area networks.

Connectivity via the Internet snow common in many of the latest applications from home

appliances, to vending machines, to testing equipment, to UPS, etc. An Ethernet network can link

office automation and industrial control networks, access remote systems and share data and

information between machines from multiple vendors, and also provides a cost-effective solution

for industrial control networks.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -8 -

Tiny Serial-to-Ethernet Device Server

1.2 VxComm Technology

In general, writing a TCP/IP program is more difficult than writing a COM Port program. Another

issue is that perhaps the existing the COM Port communication system was built many years ago

and is now outdated.

As a result, a new technology, VxComm was developed to virtualize the COM Ports of the tDS-700

to allow up to 256 COM Ports to be used on a central computer. The VxComm driver saves time

when accessing serial devices through the Ethernet without the need for reprogramming the COM

Port software on the PC.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -9 -

Tiny Serial-to-Ethernet Device Server

The VxComm driver controls all the details of the Ethernet TCP/IP programming technique,

meaning that, with the assistance of tDS-700 and VxComm technology, your COM Port program will

be able to access your serial devices through the Ethernet in the same way as through a COM Port.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -10 -

Tiny Serial-to-Ethernet Device Server

1.3 Web Server Technology

Web server technology enables the tDS-700 to be configured via a standard web browser interface,

e.g. Google Chrome, Internet Explorer, or Firefox, etc. This means that it is easy to check the

configuration of thetDS-700 via an Ethernet network without needing to install any other software

tools, thereby reducing the learning curve required for maintaining the device.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -11 -

Tiny Serial-to-Ethernet Device Server

Model

tDS-712

tDSM-

tDS-722

tDS-732

tDS-715

tDS-725

tDS-735

tDS-718

tDS-718i-D

tDS-724

tDS-734

System

CPU

32-bit ARM

Communication Interface

10/100 Base-TX, 8-pin RJ-45 x 1, (Auto-negotiating, Auto-MDI/MDIX, LED indicator)
PoE (IEEE 802.3af, Class 1)

tDS-718(i):

5-wire RS-232

2-wire RS-485

5-wire
RS-232

3-wire
RS-232

2-wire
RS-485

2-wire
RS-485

5-wire
RS-232

3-wire
RS-232

3-wire
RS-232

2-wire
RS-485

3-wire
RS-232

Self-Tuner

-

Yes, automatic RS-485 direction control

RS-

Bias Resistor

-

Yes, 1 KΩ

Node - 254 (max.)

UART

16c550 or compatible

Power Isolation

1000 V

DC

for tDS-722i / 732i / 718i-D only

Signal Isolation

3000 V

DC

for tDS-712i / 715i / 725i / 735i / 718i / 724i / 734i only

ESD Protection

+/-4 kV

COM Port Format

Baud Rate

115200 bps Max.

Data Bit

5, 6, 7, 8

Parity

None, Odd, Even, Mark, Space

Stop Bit

1, 2

Power

PoE: IEEE 802.3af, Class 1
DC jack: +12 ~ 48 VDC

Power Consumption

0.07 A @ 24 VDC

Mechanism

Male DB-9 x1 for tDS-712(i)/718i-D and tDSM-712
10-Pin Removable Terminal Block x 1 for tDS-722(i)/732(i)/715(i)/725(i)/735(i)/718(i)/724(i)/734(i)

Mounting

DIN-Rail

Case

Plastic

Metal

Plastic

Environment

Operating Temperature

-25 ~ +75 °C

Storage Temperature

-30 ~ +80 °C

Humidity

10 ~ 90% RH, non-condensing

Note: COM1/COM2/COM3 = TCP Port 10001/10002/10003

2. Hardware Information

This chapter provides a detailed description of the front panel, the hardware specifications, the pin
assignments, the wiring notes and the dimensions for the tDS-700 series modules.

2.1 Specifications

Ethernet

COM1

COM2
COM3

485

tDS-712i

5-wire RS-232

-

- -

712

tDS-722i

5-wire
RS-232

tDS-732i

3-wire
RS-232

tDS-715i

2-wire
RS-485
4-wire
RS-422

-

- -

tDS-725i

2-wire
RS-485

tDS-735i

2-wire
RS-485

tDS-718i

3-wire RS-232
tDS-718i-D:

4-wire RS-422

-

- -

tDS-724i

2-wire
RS-485

tDS-734i

2-wire
RS-485

Power Input

Connector

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -12 -

Tiny Serial-to-Ethernet Device Server

2.2 Features

 Incorporates any RS-232/422/485 serial device in Ethernet
 Data transmission via Virtual COM or raw TCP connection
 VxComm Driver for 32-bit and 64-bit Windows XP/7/8/2012/2016/10
 Max. connections: 1 socket per serial port is suggested
 Supports pair-connection (serial-bridge, serial-tunnel) applications
 Supports TCP client-mode and TCP server-mode operations
 Supports UDP responder for device discovery (UDP Search)
 Static IP or DHCP network configuration
 Easy firmware update via the Ethernet (BOOTP, TFTP)
 Tiny Web server for configuration (HTTP)
 Contains a 32-bit MCU that efficiently handles network traffic
 10/100 Base-TX Ethernet, RJ-45 x1 (Auto-negotiating, auto MDI/MDIX, LED Indicators)
 Includes redundant power inputs: PoE (IEEE 802.3af, Class 1) and DC jack
 Allows automatic RS-485 direction control
 Power or Signal isolation for i versions
 +/- 4 kV ESD protection
 Male DB-9 or terminal block connector for easy wiring
 Tiny form-factor and low power consumption
 RoHS compliant with no Halogen
 Cost-effective device servers

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -13 -

Tiny Serial-to-Ethernet Device Server

5. Serial COM Ports

4. LED indicator

3. Operating Mode
Switch

2. +12 to +48 VDC Jack

1. PoE and Ethernet
RJ-45 Jack

6. DIN-Rail Mounting

2.3 Appearance

PoE and Ethernet RJ-45 Jack

The tDS-700 series module is equipped with an RJ-45 jack that is used as the 10/100 Base-TX

Ethernet port and features networking capabilities. When an Ethernet link is detected and an

Ethernet packet is received, the Link/Act LED (Orange) indicator will be illuminated. When power is

supplied via PoE (Power-over-Ethernet), the PoE LED (Green) indicator will be illuminated.

+12 to +48 VDC Jack

The tDS-700 series is equipped with a +12VDC to +48 VDC jack that can be used to connect a power

supply. If no PoE switch is available on site, a DC adapter can be used to power the tDS-700 series

module.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -14 -

Tiny Serial-to-Ethernet Device Server

Function

RS-232

RS-485

RS-422

Operating Mode Switch

Run Mode: Firmware operation Init Mode: Configuration mode

For tDS-700 series modules, the operating mode switch is set to the Run position by default. In
order to update the firmware for the tDS-700 series module, the switch must be moved from the
Run position to the Init position. The switch must be returned to the Run position after the update
is complete.

LED Indicator

Once power is supplied to the tDS-700 series module, the system LED (S1) indicator will illuminate.

An overview of the S1 LED functions is given below:

Function Color S1 LED Behavior

Running Firmware

Network Ready Slow flashing – Once every 3 seconds

Serial Port Busy Rapid flashing – Once every 0.2 seconds

Red

The following serial port LED indicators are tDS-718i-D only. You can change the serial interface via

web server. An overview of the serial Port LED functions is given below:

Steady ON

LED Behavior

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -15 -

Tiny Serial-to-Ethernet Device Server













Serial COM Ports

The number of serial COM Ports available depends on the type of tDS-700 series module. For more

detailed information regarding the pin assignments for the Serial COM ports, refer to Section 2.5

“Pin Assignments”.

DIN-Rail Mounting

The tDS-700 series modules include simple rail clips on the

bottom of the chassis that allow them to be reliably

mounted on a DIN-Rail or a wall. For more detailed

information regarding DIN-Rail Mounting, refer to the

illustration in figure below.

Mounting on a DIN-Rail

Dismounting form a DIN-Rail

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -16 -

Tiny Serial-to-Ethernet Device Server

2.4 Dimensions

The following diagrams provide the dimensions of the tDS-700 series module and CA-002 cable that

can be used as a reference when defining the specifications and the DC power supply plug for any

custom enclosures. All dimensions are in millimeters.

2.4.1 tDS-700 Series Module

 tDS-712:

 tDSM-712:

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -17 -

Tiny Serial-to-Ethernet Device Server

 tDS-712i/718i-D:

 tDS-722(i)/732(i)/715(i)/725(i)/735(i)/718(i)/724(i)/734(i):

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -18 -

Tiny Serial-to-Ethernet Device Server

P1

P2

2.4.2CA-002 Cable

1 RED OPEN

2 BLACK OPEN

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -19 -

Tiny Serial-to-Ethernet Device Server

tDS-712/tDSM-712

tDS-712i

Terminal No.

Pin Assignment

09

N/A

N/A

08

CTS1

CTS1

07

RTS1

RTS1

06

N/A

N/A

05

GND

ISO.GND

04

N/A

N/A

03

TxD1

TxD1

02

RxD1

RxD1

01

N/A

N/A

tDS-722

tDS-722i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

CTS2

CTS2

08

RTS2

RTS2

07

RxD2

RxD2

06

TxD2

TxD2

05

GND

ISO.GND

04

CTS1

CTS1

03

RTS1

RTS1

02

RxD1

RxD1

01

TxD1

TxD1

2.5 Pin Assignments

tDS-712/tDS-712i/tDSM-712

COM1

tDS-722/tDS-722i

COM2

COM1

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -20 -

Tiny Serial-to-Ethernet Device Server

tDS-732

tDS-732i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

GND

ISO.GND

08

RxD3

RxD3

07

TxD3

TxD3

06

GND

ISO.GND

05

RxD2

RxD2

04

TxD2

TxD2

03

GND

ISO.GND

02

RxD1

RxD1

01

TxD1

TxD1

tDS-715

tDS-715i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

N/A

N/A

08

N/A

N/A

07

N/A

N/A

06

N/A

N/A

05

GND

ISO.GND

04

RxD1-

RxD1-

03

RxD1+

RxD1+

02

TxD1-/D1-

TxD1-/D1-

01

TxD1+/D1+

TxD1+/D1+

tDS-732/tDS-732i

COM3

COM2

COM1

tDS-715/tDS-715i

RS-485/RS-422

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -21 -

Tiny Serial-to-Ethernet Device Server

tDS-725

tDS-725i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

N/A

N/A

08

N/A

N/A

07

N/A

N/A

06

GND

ISO.GND

05

D2-

D2-

04

D2+

D2+

03

GND

ISO.GND

02

D1-

D1-

01

D1+

D1+

tDS-735

tDS-735i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

GND

ISO.GND

08

D3-

D3-

07

D3+

D3+

06

GND

ISO.GND

05

D2-

D2-

04

D2+

D2+

03

GND

ISO.GND

02

D1-

D1-

01

D1+

D1+

tDS-725/tDS-725i

COM2

COM1

tDS-735/tDS-735i

COM3

COM2

COM1

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -22 -

Tiny Serial-to-Ethernet Device Server

tDS-718

tDS-718i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

N/A

N/A

08

GND

ISO.GND

07

RxD1

RxD1

06

TxD1

TxD1

05

GND

ISO.GND

04

RxD1-

RxD1-

03

RxD1+

RxD1+

02

TxD1-/D1-

TxD1-/D1-

01

TxD1/D1+

TxD1/D1+

RS-232

RS-422

RS-485

Terminal No.

Pin Assignment

09

- - -

08

CTS - -

07

RTS - -

06

- - -

05

GND

GND

GND

04 - RxD-

-

03

TxD

RxD+

-

02

RxD

TxD+

Data+

01 - TxD-

Data-

tDS-718/tDS-718i

RS-232

RS-485/RS-422

tDS-718i-D

COM1

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -23 -

Tiny Serial-to-Ethernet Device Server

tDS-724

tDS-724i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

GND

ISO.GND

08

CTS2

CTS2

07

RTS2

RTS2

06

GND

ISO.GND

05

RxD2

RxD2

04

TxD2

TxD2

03

GND

ISO.GND

02

D1-

D1-

01

D1+

D1+

tDS-734

tDS-734i

Terminal No.

Pin Assignment

10

F.G.

F.G.

09

GND

ISO.GND

08

RxD3

RxD3

07

TxD3

TxD3

06

GND

ISO.GND

05

RxD2

RxD2

04

TxD2

TxD2

03

GND

ISO.GND

02

D1-

D1-

01

D1+

D1+

tDS-724/tDS-724i

COM2

COM1

tDS-734/tDS-734i

COM3

COM2

COM1

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -24 -

Tiny Serial-to-Ethernet Device Server

2.6 Wiring Notes for RS-232/485/422 Interfaces

RS-232 Wiring

3-wire RS-232 Connection

5-wire RS-232 Connection

Note: FGND is the frame ground that is soldered to the metal shield on the DB-9 cable.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -25 -

Tiny Serial-to-Ethernet Device Server

RS-422 Wiring

RS-485 Wiring

Notes:

1. Usually, you have to connect all signal grounds of RS-422/485 devices together to reduce common-mode
voltage between devices.

2. Twisted-pair cable must be used for the DATA+/- wires.

3. Both two ends of the cable may require a termination resistor connected across the two wires (DATA+ and
DATA-). Typically 120 Ω resisters are used.

4. The Data+ and B pins are positive-voltage pins, and Data- and A pins are negative-voltage pins in the

above figure. The B/A pins may be defined in another way depending on devices, please check it first.

Copyright © 2018 ICP DAS CO., Ltd. All Rights Reserved. -26 -