Omega Engineering TV Converter Box DIN 190 User Manual

Users Guide  
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DIN-190 and DIN-192 Series  
Converter Boxes  
 
DIN-191 and DIN-192 SERIES  
CONVERTER BOXES  
USERS MANUAL  
REVISED: 10-30-00  
Omega Engineering  
One Omega Drive  
P O Box 4047  
Stamford, CT 06907  
Phone: 1-800-DAS-IEEE  
Fax: 203-359-7990  
The information in this publication has been carefully checked and is  
believed to be accurate; however, no responsibility is assumed for  
possible inaccuracies or omissions. Applications information in this  
manual is intended as suggestions for possible use of the products and  
not as explicit performance in a specific application. Specifications may be  
subject to change without notice.  
 
3 DIN-191 & DIN-192 USERS MANUAL  
GENERAL DESCRIPTION  
The DIN-191 and DIN-192 series converter boxes convert RS-232  
communications signal levels to the correct electrical signals required by  
RS-485. The RS-485 communications standard is recommended when  
many modules, or other addressable devices, must be connected to a  
host computer over long distances. The DIN-191 and DIN-192 converters  
allow communications bus lengths up to 4,000 meters and baud rates up  
to 115K baud using one twisted pair of wires.  
The RS-485 communications standard is half-duplex; therefore data can  
be transmitted in only one direction at a time. To determine the direction  
of data on the RS-485 bus, many products require external handshaking  
signals to control the bus direction when transmitting or receiving data.  
This technique often requires that host RS-232 software be written, or  
modified, to accurately control handshaking signals for proper system  
operation. The DIN-191 and DIN-192 automatically control the bus  
direction without external handshaking signals from the host. Therefore,  
host software written for RS-232 may be used without modification. RS-  
485 bus control is completely transparent to the user.  
The DIN-192 is an RS-485 repeater. Repeaters are required to extend  
communications bus lengths or allow more than 32 RS-485 devices to be  
connected to a communications bus. A repeater simply re-amplifies, or  
boosts, existing RS-485 signals transmitted over long distances.  
The DIN-191 and DIN-192 are each isolated between the RS-232 port  
and/or RS-485 ports and require a regulated +5Vdc power supply.  
 
DIN-191 & DIN-192 USERS MANUAL 4  
SPECIFICATIONS  
Max common mode voltage: 500Vrms, 60s duration.  
Baud rates: 300, 600, 1200, 2400, 4800, 9600, 19200,  
38400, 57600, 115200 (Dip -switch selectable).  
Temperature range (operating & storage): -25 to +70°C.  
Relative humidity: 0 - 95% noncondensing.  
Warranty: 12 months on workmanship and materials.  
Power Specifications  
Power requirements: Regulated +5Vdc.  
Power consumption: 1.0W Max (RS-485 driver on).  
MECHANICALS AND DIMENSIONS  
Case: ABS case with screw terminal barrier plug (supplied.  
RS-485 Connectors: Phoenix screw terminal barrier plug (supplied).  
Replace with Phoenix MSTB 2.5/4 ST 5.08 or equivalent.  
Warranty: 12 months on workmanship and materials.  
DIN-191 CONNECTORS  
The DIN-191 contains two connectors: a four-pin screw terminal plug and  
a female DB-9 RS-232 connector.  
The four -pin screw terminal plug pin designations are located on the  
label of each module. The screw terminals will accept up to #14 gauge  
wire (AWG). This connector is used for +5.0Vdc regulated power supply  
input and the RS-485 data lines.  
 
5 DIN-191 & DIN-192 USERS MANUAL  
The DIN-191 female RS-232 connector utilizes five connections:  
Transmit  
Receive  
Ground  
Data Set Ready (DSR)  
Clear To Send (CTS)  
pin 2  
pin 3.  
pin 5.  
pin 6  
pin 8  
Both the Data Set Ready (DSR) input pin #6 and Clear To Send (CTS)  
input pin #8 are internally biased to their active state thru a 330W resistor  
to +5Vdc.  
To easily connect to any host PC computer, a straight thru RS-232 cable  
can be used. The RS-232 input Ground and signals are isolated by up to  
500VRMS from the power supply ground. Cable CA-1 is a male-to-male  
DB-9 communications cable available for purchase from us.  
Figure 1A Connections for DIN-191.  
An RS-485 repeater is necessary to extend the length of an RS-485  
network, or connect more than 32 RS-485 devices on an RS-485  
network.  
The DIN-192 repeater contains a seven-pin screw terminal plug. The pin  
designations are located on the label of each module. The screw  
terminals will accept up to #14 gauge wire (AWG). This connector is used  
for +5.0Vdc regulated power supply input and both pairs of RS-485 data  
lines. The isolated RS-485 input data lines are clearly marked and their  
ground reference is isolated by up to 500VRMS from the power supply  
ground. The isolated RS-485 input data lines should be attached to the  
end of an existing RS-485 network. The serial data received on the  
 
DIN-191 & DIN-192 USERS MANUAL 6  
isolated RS-485 input data lines will be re-amplified and retransmitted on  
the RS-485 OUT data lines.  
.
RS-485  
Output  
RS-485  
Input  
Figure 1B Connections for DIN-192.  
BAUD RATE  
The DIN-191 and DIN-192 series converters contain a 10-position DIP  
switch located on the bottom of each unit. The DIP switch is used to  
select the correct communications baud rate and must be set to the same  
value as the devices connected to the RS-485 data lines. Each position  
on the DIP switch is labeled from 1 to 10. Switch position 1 selects 300  
baud. Switch positions 2 thru 9 select standard baud rates from 600 to  
57.6K respectively. Switch position10 selects 115.2K baud rate. Only  
one baud rate switch may be turned on (up position) at one time for  
proper operation.  
RS-485 TERMINATIONS  
The proper termination techniques for any RS-485 system require two  
biasing resistors and two termination resistors. The 1kW biasing resistors  
are connected from the DATA line to +5Vdc and from the DATA* line to  
ground. The biasing resistors and are normally positioned at the HOST  
end of the cable. The RS-485 standard also requires two resistors across  
the data lines for proper termination. Two 220W resistors should be  
connected between the DATA and DATA* lines. The resistors should be  
placed at each end of the RS-485 cable. Please refer to Figure 2 for a  
typical RS-485 system application.  
The DIN-191 and DIN-192 each contain the biasing and termination  
resistors necessary to interface any equipment on an RS-485 network.  
These resistors are jumper-selectable making it easier to interface the  
DIN-191 and DIN-192 to other pieces of equipment that may or may not  
contain the biasing and/or termination resistors.  
 
7 DIN-191 & DIN-192 USERS MANUAL  
Figure 2. RS-485 biasing & termination resistors.  
RS-485 TERMINATION & BIASING SETTINGS  
Proper termination and biasing of any RS-485 based system can be  
performed by properly enabling the correct resistors inside each DIN-191  
or DIN-192. Figures 3.0 and 4.0 show the location of the jumpers on the  
printed circuit board. The jumpers are shown in their factory set locations  
to enable the selected resistors. Insert or remove the jumpers as required  
to properly terminate any RS-485 system.  
Figure 3. DIN-192 jumper locations.  
 
DIN-191 & DIN-192 USERS MANUAL 8  
FIGURE 4. DIN-192 jumper locations.  
FACTORY RS-485 TERMINATION SETTINGS  
Each DIN-191 and DIN-192 contains internal pin strips for enabling the  
internal termination and biasing resistors. Each pc board is clearly marked  
with the jumper designators adjacent to each row of pins. The jumper  
designators are +1K, 220 and -1K. To enable any resistor, place a jumper  
over the pins next to the required designator. The factory switch and  
jumper settings are outlined below.  
DIN-191:  
Baud Rate: 300 baud switch up.  
Biasing Resistors: +1K, -1K jumpers installed.  
Termination Resistor: 220 jumper installed.  
DIN-192:  
Baud Rate: 300 baud switch up.  
RS-485 (J3):  
Biasing Resistors: +1K, -1K jumpers installed.  
Termination Resistor: 220 jumper installed.  
Isolated RS-485 (J2): Biasing Resistors: +1K, -1K jumpers installed.  
Termination Resistor: 220 jumper not installed.  
 
WARRANTY/DISCLAIMER  
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and  
workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an  
additional one (1) month grace period to the normal one (1) year product warranty to cover  
handling and shipping time. This ensures that OMEGA’s customers receive maximum  
coverage on each product.  
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer  
Service Department will issue an Authorized Return (AR) number immediately upon phone or  
written request. Upon examination by OMEGA, if the unit is found to be defective, it will be  
repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting  
from any action of the purchaser, including but not limited to mishandling, improper interfacing,  
operation outside of design limits, improper repair, or unauthorized modification. This  
WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence  
of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibra-  
tion; improper specification; misapplication; misuse or other operating conditions outside of  
OMEGA’s control. Components in which wear is not warranted, include but are not limited to  
contact points, fuses, and triacs.  
OMEGA is pleased to offer suggestions on the use of its various products. However,  
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability  
for any damages that result from the use of its products in accordance with information  
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts  
manufactured by the company will be as specified and free of defects. OMEGA MAKES  
NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,  
EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES  
INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR  
PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of pur-  
chaser set forth herein are exclusive, and the total liability of OMEGA with respect to this  
order, whether based on contract, warranty, negligence, indemnification, strict liability or  
otherwise, shall not exceed the purchase price of the component upon which liability is  
based. In no event shall OMEGA be liable for consequential, incidental or special damages.  
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as  
a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity;  
or (2) in medical applications or used on humans. Should any Product(s) be used in or with any  
nuclear installation or activity, medical application, used on humans, or misused in any way,  
OMEGA assumes no responsibility as set forth in our basic WARRANTY/DISCLAIMER language,  
and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability  
or damage whatsoever arising out of the use of the Product(s) in such a manner.  
RETURN REQUESTS/INQUIRIES  
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.  
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN  
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT  
(IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be  
marked on the outside of the return package and on any correspondence.  
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to  
prevent breakage in transit.  
FOR WARRANTY RETURNS, please have  
the following information available BEFORE  
contacting OMEGA:  
1. Purchase Order number under which  
the product was PURCHASED,  
2. Model and serial number of the product  
under warranty, and  
3. Repair instructions and/or specific  
problems relative to the product.  
FOR NON-WARRANTY REPAIRS, consult  
OMEGA for current repair charges. Have the  
following information available BEFORE  
contacting OMEGA:  
1. Purchase Order number to cover the  
COST of the repair,  
2. Model and serial number of the  
product, and  
3. Repair instructions and/or specific problems  
relative to the product.  
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.  
This affords our customers the latest in technology and engineering.  
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.  
© Copyright 2005 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,  
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without  
the prior written consent of OMEGA ENGINEERING, INC.  
 
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