Uotek UT-217E User Manual

RS-232/RS-485/RS-422 UT-217E

NO Power Photoelectric Isolation

Interface Converter

User Manual

The converter is applicable for all the existing communication

software and interface hardware without any software modifications

for the previous working mechanism based on RS-232.

A reliable and stable point-to-point and point-to-multipoint

communication can be ensured by UT-217E photoelectric isolation

interface converter. For point-to-multipoint communication, as

many as 32 interface facilities of RS-422 or RS-485 standard can

be connected to each converter, and a high data transmission rate

of 300-115.2KBPS can be achieved. Power indicator light and

data traffic indicator light are also available with the converter

for malfunction indication. Two conversion communication modes

including RS-232 to RS-422 and

RS-232 to RS-485 are supported.

II. Performance parameters

1. Interface characteristic: compatible with the standards of

RS-232C and RS485/RS-422 issued by EIA/TIA.

2. Electric interface: DB9 female connector for RS-232 interface

input end, RJ-45 and 4PIN connector for RS-422/RS-485 interface

output end.

3. Protection grade: +/-15KV ESD protection for RS-232 interface,

and 600W surge protection each line for RS-422 and RS-485

interfaces.

4. Isolation degree: isolation voltage 2500Vrms 500DC non-stop.

5. Operation mode: asynchronous half duplex or asynchronous

full duplex.

6. Signal indication: 3 pilot lamps for Power (PWR), Send (TXD)

and Receive (RXD).

7. Transmission media: twisted pair cable or shielded cable.

8. Transmission rate: 115.2K BPS to 300M, 38.4K BPS to 2.4KM

and 9,600 BPS to 5KM.

9. Dimensions: 93mm 74mm 22mm.

10. Working circumstance: -40 to 85 , relative humidity 5%-95%.

11. Transmission distance: 0-1,200meters (115,200bps-9,600bps).

III. Connector and signal

RS-232C bay-line distribution

Earth protection

Receive data SIN(RXD)

Send data SOUT (TXD)

Data terminal ready DTR

Ground signal GND

Data setting ready DSR

Request send RTS

Clear send CTS

Ring indication RI

DB 9 Female

(PIN)

RS-232C Interface signal

IV. Hardware installment and application

Read the user manual carefully before installing the UT-217E photoelectric isolation interface converter. Connect the attached communication cable to RS-232 interface, and insert the power supply converter to power socket. The product adopts the DB-9/RJ-45 general used connector for input and output interface without jumper setting for RS-485 or RS-422 automatic communication mode. Either twisted pair cable or shielded cable is applicable for easy installation or un-installation. T/R+T/R-represents sending and receiving the A+/B-, RXD+/RXD- represents receiving the A+/B-,VCC represents power input or output, GND represents public underground line. Point-to-point and point-to-multipoint

RS-485/RS-422 output signal and connector end bay-line distribution

RJ-45 bay-line distribution

4PIN

(PIN)

Output signal

RS-422 full-duplex connection

RS-485 half-duplex connection

T/R+

T/R-

RXD+

RXD-

GND

Send(A+)

Send(B-)

Receive(A+)

Receive(B-)

Underground line

RS-485 (A+)

RS-485 (B-)

None

Underground line

RJ-45

4.5.7.8

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Compatible with the Recommended Standards of RS-232C,

RS-422 and RS-485 UT-217E photoelectric isolation interface

converter can convert the single-ended RS-232 signal into

balance differe nced RS-422 or RS-485 signal. The built-in

photoelectric isolator can provide an isolation voltage of as high

as 2500Vrms. Also, there is a rapid transient voltage suppression

protector for protec tion of RS-422/RS-485 interface with advanced

TVS(TRANSIENT VOLTAGE SUPPRESSOR) technology

adopted. Under normal conditions, the TVS tube is in the state

of high resistance. However, when both ends of the TVS tube are

hit by a transient high energy, the impedance at both ends can be

depressed by the TVS at a very high speed, and after absorbing a

high current, the volt age between the two ends is suppressed

and kept at a pre-set value, therefore no damage is caused to the

electrical components behind by the transient high voltage impact.

The protector can effectively restrain lightning or ESD (electro

static discharge) with a protection voltage of 600W on each line

for lightning surge and surge voltage or transient over voltage

possibly caused up by various reasons, and at the same time, a

high-speed tra nsmission of RS-422/RS-485 interface is ensured

by the tiny capacitance between the poles. Through a DB9 female

connector RS-232 interface is connected to other interfaces

compatible wit h RS-232C standard, and for RS-422 and RS-485

interfaces RJ- 45 and 4PIN connector is to be used for connection.

The unique I/O circuit of the internal zero delay auto transceiver

contained in the converter controls the data stream direction

automatically without any handshaking signal (for example RTS,

DTR etc). The converter is plug-and-play without any jumper

settings needed for mode shift between full duplex (RS-422)

and half duplex (RS-485).

I. Summary

Half duplex communication use the two lines of T/R+ and T/R-, point-to-point and point-to-multipoint full duplex communication use the four lines of T/R+, T/R-, RXD+ and RXD-. UT-217EE interface converter supports the following 4 communication modes:

1. Point-to-point 4-line full duplex

2. Point-to-multipoint 4-line full duplex

3. Point-to-point 2-line half duplex

4. Point-to-multipoint 2-line half duplex In order to prevent the signal reflection or interference when converter is used in full-duplex or half-duplex mode.

V. Communication connection chart

Conversion from RS-232 to RS-422

1.RS-422 point-to-point 4-line full duplex communication

2. RS-485 point-to-multipoint /2-line half duplex

RS-422 Machine

UT-217E

Conversion from RS-232 to RS-485

1. RS-485 point-to-point /2-line half duplex

2. RS-485 point-to-multipoint /2-line half duplex

3. Half-duplex communication connections between UT-217E interfaces

UT-217E

VI. Problems and resolutions

1. Data communication failure A. Make sure RS-232 interface connection is correct. B. Make sure RS-485/RS-422 output interface connection is correct. C. Make sure power supply is OK. D. Make sure the wire terminal connection is OK. E. Make sure the pilot lamp flashes when receiving. F. Make sure the pilot lamp flashes when sending.

2. Data missing or incorrect A. Check to see whether if the data rate and format at both ends of the communication equipment are consistent.

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UT-217E

RS-422 Machine

Uotek UT-217E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual