Yokogawa JUXTA ML2 - Manual

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
1
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
1. 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.
2. 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 Ϯ 0.2
(51)
(85)
Socket
Unit: mm
2- л 4.5 or 2-M4
Pitch: 56 or more
[Mounting Dimensions]
5 or more
IM 77J04L02-01E