Moxa Technologies Transio A52 Manuale utente

P/N: 1802000520518

*1802000520518*

Transio A52/A53 Series

Quick Installation Guide

Version 8.1, January 2021

Technical Support Contact Information

www.moxa.com/support



- 2 -

Overview

The Transio A52/A53 are smart RS-232 to RS-422/485 bi-directional

converters that allow one RS-232 port to be converted into an RS-422 or

RS-485 port. With the A52/A53 you can control up to 32 devices within

1.2 km in a multidrop environment.

To ease 2-wire RS-485 half-duplex control, Automatic Data Direction

Control (ADDC) intelligence, which does not requires a baudrate switch

setting, is designed into each A52/A53 to simplify your RS-485 software

programming. Your applications can easily manage data transmitting and

receiving via the half-duplex RS-485 port without using additional code.

Compared to other products that require using switches to set the clock

speed manually, the A52/A53 let you avoid many development and

maintenance hassles.

To meet the high reliability required by harsh industrial environments, all

RS-422/485 signals provide TVS protection. In addition, the A53 provides

2 KV of optical isolation protection for all signals at the RS-422/485 end.

Features and Specifications

•Serial interface: RS-232, RS-422/485

•Port types:

RS-232: RJ45;

RS-422/485: RJ45 or Terminal Block

•High speed, baudrate up to 921.6 Kbps; no switch setting needed

•Signals:

RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND;

RS-422: TxD+(B)/-(A), RxD+(B)/-(A), RTS+(B)/-(A), CTS+(B)/-(A),

GND;

RS-485-Data+(B)/-(A), GND

•Supports Automatic Data Direction Control (ADDC) with no baudrate

switch settings for RS-485

•RS-485 data control modes: auto (ADDC) or by RTS

•RS-422 supports CTS, RTS signals for hardware flow control

•LED indicators for power and 4 signal states (TxD, RxD, RTS, CTS)

•All RS-422/485 signals provide TVS protection.

•All RS-422/485 signals support up to 2 KV (DC) of optical isolation

protection (A53 only)

•Provides overloading protection when there are 2 signals shorted

together at the RS-422/485 end

•Built-in 120 ohm termination resistors for RS-422/RS-485 (selectable

by jumper in RS-485 mode)

•Supports up to 32 units connected in an RS-485 multidrop network

•CE/FCC approval

•9 V 1.5 A UL 110/230 V power adaptor can support up to 4 converters

- 3 -

•An external power adaptor is required, with input voltage for the

converter ranging from DC +9V to +30V.

•Operating temperature: 0 to 55°C

•Dimensions: 90 x 60 x 21 mm

•Mounting Kit: Plastic Plates and screws for mounting the A52/A53 on

a wall or surface.

•Power consumption:

A52: 157 mA max. (+9V);

A53: 285 mA max. (+9V)

Applications

•Multipoint data acquisition

•

Factory automation

•

Remote serial device control

•Building security automation

•

Critical industrial control

Installation

Switch and jumper settings

To change the operation mode, remove the two screws on the top of the

converter, open the cover, and then use the array of sliding switches to set

the desired mode.

DIP switches are used to select the operation mode (RS-422 or RS-485).

For RS-485 mode, the control mode (By RTS or ADDC) is also set by DIP

switch.

AUTO

485

RTS

422

Internal view of A52/A53 (*default settings)

SW1

SW2

RS-422 mode

Off

By RTS

Off

RS-485 mode

On*

Auto Data Direction Control (ADDC)

On*

In RS-422 mode, RxD is automatically set with a 120 ohm terminating

resistor.

In RS-485 mode, the 120 ohm terminating resistor is set by one jumper.

When shorted, the resistor is enabled.

- 4 -

Basic Communication Wiring

Before placing a converter in an existing network, the converter should be

properly configured. The following diagrams show typical layouts for both

converters.

LED Indicators

LED indicators for TxD, RxD, RTS, CTS signals and PWR are located on the

top of the A52/A53. The indicator light is NOT lit when there is no signal,

or the power is off.

TxD:

Shows green when connected and transmitting data from RS-232

to RS

-422/485.

RxD:

Shows green when connected and receiving data from RS-232 to

-422/485.

RTS:

hows green when connected and RS-232 RTS Signal is ON.

CTS:

Shows green when connected and RS-232 CTS Signal is ON.

PWR:

Shows green when the power is ON.

- 5 -

Power Supply

The A52/A53 converters are designed for standard +24 VDC unregulated

power for use in industrial environments. Operation is guaranteed when

using any power supply between +9 and +30 VDC at 350 mA. An optional

power adaptor (9 V 1.5 A UL 110/230 V) can support up to 4 converters

(see the following diagram).

A52/A53 Converter Connection Diagram

RS-232 Pinouts

10-pin RJ45 Jack

The RJ45 port for the RS-232 signal is shown in the

llowing figure.

A52/A53 RJ45 Connector Pinouts

RS-232

DCD (Always On)

RxD

DSR

GND

RTS

CTS

GND

DTR

TxD

–

NOTE

Each group of (DTR, DSR) pins are shorted, freeing users from

the hardware flow control cable wiring problem. For this reason,

we list two types of RS-232 cable wiring below.

Type 1:

To connect the RS-232 side of A52/A53 to a DTE (e.g., PC

COM1/2) or DCE. (B

e sure to check the precise DTE/DCE

pinouts. The following DTE/DCE pinouts are just an example.)

A52/A53

RJ45

DTE Device

DB25 Male

DTE Device

DB9 Male

DCE Device

DB25 Female

DCD

–

DCD

DSR

DTR

RTS

CTS

GND

TxD

RxD

TxD

GND

CTS

RTS

DTR

DSR

- 6 -

Type 2:

You can connect the RS-232 side of the A52/A53 to a DTE, such

a terminal or PC COM1/2, with 3-pin wiring if you don’t

need

hardware flow control.

A52/A53

RJ45

DTE Device

DB25 Male

DTE Device

DB9 Male

DCE Device

DB25 Female

TxD

RxD

TxD

GND

RS-422/RS-485 Pinouts

The RS-422/RS-485 port with RJ45 connector or Terminal Block

Connector is depicted as follows.

RS-422

RS-422 with RJ45

RS-422 with Terminal Block

TxD – (A)

TxD + (B)

RTS – (A)

TxD – (A)

RTS + (B)

RxD + (B)

4/7

RxD – (A)

TxD + (B)

RxD + (B)

Power GND

CTS + (B)

VCCA (9V)

CTS – (A)

–

RxD – (A)

–

NOTE

Pins 6 and 7 of the Terminal Block are for Power GND and Power

Input, which can be used instead of a power adaptor. Be careful

NOT

TO confuse RS-422/RS-485 GND with Power GND.

SG: Signal Ground

RS-485

RS-485 with RJ45

RS-485 with Terminal Block

Data – (A)

Data + (B)

Data – (A)

Data + (B)

Power GND

–

VCCA 9 V

–

NOTE

Pins 6 and 7 of the Terminal Block are for Power GND and Power

Input, which can be used instead of a power adaptor. Be careful

NOT TO confuse RS

-422/RS-485 GND with Power GND.

SG: Signal Ground

- 7 -

WARNING

This is a Class A product. In a

domestic environment, this product

may cause radio interference in which case

the user may be

required to take appropriate measures.

Federal Communications Commission Statement

FCC - This device complies with part 15 of the FCC Rules. Operation is

subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) this device

must accept any interference received, including interference that may

cause undesired operation.

FCC

WARNING

This equipment has been tested and found to comply with the

limits for a Class A digital device, pursuant to

part 15 of the FCC

Rules. These limits are designed to provide reasonable protection

against harmful

interference when the equipment is operated in

commercial environment. This equipment generates, uses,

and

can radiate radio frequency energy and, if not installed and used

in accordance with the instruction

manual, may cause harmful

interference to radio communications. Operation of this

equipment

in a residential area is likely to cause harmful

interference in which case the user will be required to correct the

interference at his own expense..

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