Yokogawa JUXTA ML2 User Manual download pdf

User’s

Manual

Network Solutions Business Divisiion

2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan

Phone: +81-422-52-7179 Facsimile: +81-422-52-6793

Please read through this User’s Manual before use for correct handling.

Please keep this User’s Manual for future reference.

Model ML2

RS232C/RS485

Converter

CAUTIONARY NOTES FOR SAFE USE OF THE PRODUCT

This User’s Manual should be carefully read before installing and oper-

ating the product. The following symbol is used on the product and in

this manual to ensure safe use.

This symbol is displayed on the product when it is

necessary to refer to the User’s Manual for information on

personnel and instrument safety. This symbol is displayed

in the User’s Manual to indicate precautions for avoiding

danger to the operator, such as an electric shock.

The following symbols are used only in this manual.

IMPORTANT

Indicates that operating the hardware or software in a

particular manner may cause damage or result in a system

failure.

NOTE

Draws attention to essential information for understanding

the operations and/or functions of the product.

CHECKING PRODUCT SPECIFICATIONS AND PACKAGED ITEMS

(1) Checking the Model and Product Specifications

Check that the model and specifications indicated on the nameplate

attached to the side face of the main unit are as ordered.

(2) Packaged Items

Check that the packing carton contains the following items:

● ML2: 1

● Spacer (used for DIN rail mounting): 1

● Tag number label: 1 sheet

● User’s Manual (this manual: IM 77J04L02-01E): 1 copy

3. GENERAL

This plug-in type RS-232C/RS-485 dual directional (half duplex) con-

verter has two ports of RS-232C and RS-485. Between these two

ports, isolation, level conversion and active control of driver are per-

formed. This converter is mainly used to connect RS-232C of personal

computer with the instruments equipped with RS-485.

Main Features and Functions

● Two modes (Auto and Manual) for Active control of RS-485 driver

can be selected with the DIP switch.

Auto: When start bit is detected on RS-232C side, the converter

makes RS-485 driver active.

Manual: Active control of RS-485 driver depends on RS (Request to

Send) of outer set instrument connected with RS-232C.

IM 77J04L02-01E

1st Edition Sep. 2004 (YK)

● For RS-485, 2-wire or 4-wire can be selected by DIP switch. And

for 2-wire, On/Off of Echo back function can be selected by DIP

switch. (For 4-wire, be sure to set Echo back function at Off.)

● RS-485 line is internally equipped with 220⍀ terminating resistor.

With or without the resistor can be selected with the DIP switch.

● A corresponding communication speed can be changed to eight

stages and selected with the rotary switch.

(38400, 19200, 9600, 4800, 2400, 1200, 600, 300 bps)

4. MOUNTING METHODS

NOTE

Insert/pull out the main unit vertically to the surface of a

socket. Otherwise the terminals bend and it may cause a

bad contact.

4.1 Wall Mounting

Unlock the stoppers (top and bottom), and pull out the main unit from

the socket. Then fix the socket on wall with two M4 mounting screws.

Insert the main unit to the socket and fix the main unit with stoppers

(top and bottom).

Main unit

Socket

Stopper

Mounting

screws

Note:

(1) More than 5 mm interval is

required for side-by-side

close mounting.

(2) Use the supplied spacer for

DIN rail mounting to keep 5

mm interval.

40⫾0.2

(51)

(85)

Socket

Unit: mm

2-⭋4.5 or 2-M4

Pitch: 56 or more

[Mounting Dimensions]

5 or more

IM 77J04L02-01E

1 2 3 4

Summary of Contents

Page 1 - IM 77J04L02-01E

User’sManualNetwork Solutions Business Divisiion2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 JapanPhone: +81-422-52-7179 Facsimile: +81-422-52-67931

Page 2 - 6. EXTERNAL WIRING

2IM 77J04L02-01E 1st Edition Sep.10, 2004-004.2 DIN Rail MountingInsert DIN rail into the upper portion of the DIN rail groove at rear ofsocket of the

Page 3 - 9. EXPLANATION OF OPERATION

3IM 77J04L02-01E 1st Edition Sep.10, 2004-007. PART NAMES OF FRONT PANELThe product starts running immediately when the power is turned on;however, it

Page 4 - 10. SWITCH SETTING

4IM 77J04L02-01E 1st Edition Sep.10, 2004-0010. SWITCH SETTINGThis converter has the following five setting elements.Communication speed (Baud rate)Se

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