Omega Products CAT-285 Installation Manual

CAT-285 Superverter
RS-422/RS485 to RS-232 Interface Converter
INSTRUCTION
SHEET
M3811-1006
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1.0 SPECIFICATIONS
RS-485: Conforms to RS-485 specifications
RS-422: Conforms to RS-422 specifications
Connectors - RS-232: DB25 male
RS-485/RS422: 5 position terminal block
Indicators - TD and RD
Switches - DTE/DCE switch selectable for reversing TD & RD. 5 position dip switch: set RS­485 2 or 4 wire, RS-422 termination.
Date Rate - 0 to 64 KBPS
MTBF - 596,000 hours
Power - 115VAC @ 60 Hz (220 VAC @ 50 Hz optional).
Size 2" W x 3.5" L x 0.875" H (50.8 mm x 88.9 mm x 22.2 mm)
Environment - 0° to 50°C, 5% to 95° relative humidity.
2.0 INSTALLATION
The Model CAT-285 is designed to interface RS­232 with either RS-422 4 wire, RS-485 4 wire or RS-485 2 wire. In addition the RS-45 mode can be set to have its transmitter enabled by RTS or can be set to sense when data is being transmitted by the RS-232 device.The user also has the ability to enable a 220 Ohm terminator when the CAT-285 is configured in the 2 wire mode. To set the dip switches select the option from the chart below.
TD RTS 220W T wo- Four-
Cntrl Cntrl Term Wire Wire
Mode Mode
Mode SW1 SW2 SW3 SW4 SW5
1. RS-422 OFF OFF OFF OFF ON
2. RS-485 4 Wire Trans- OFF ON OFF OFF ON mitter enabled by RTS
3. RS-485 4 Wire Trans- ON OFF OFF OFF ON mitter enabled by TD
4. RS-485 2 Wire Trans- OFF ON X ON OFF mitter enabled by RTS
5. RS-485 2 Wire Trans- ON OFF X ON OFF mitter enabled by TD
ON = Closed OFF = Open
X = Enable (ON)/Disable(OFF) 220 Ohm Terminator
NOTE: The 220 terminator should only be selected for use in the RS-485 2 wire options.
In addition to the 5-position dip switch the user must also determine if the Model CAT-285 will look like a DCE or a DTE device.When configured as a DCE the model CAT-285 will connect to a DTE device such as a PC or terminal. When set as a DTE the model CAT-285 will connect to a DCE device such as a modem.
3.0 OPERATION
RS-422 - When the CAT-285 is configured as an RS-232 to RS-422 converter it will perform full duplex conversion of the TD and RD signals. The RS-422 equipment is connected to the Model CAT-285 through the 5 position terminal block marked G, R-, R+, T-, and T+. The R+ and R- are the receiver input into the model CAT-285 and T+ and T- are the transmitters. When connecting the CAT-285 to other RS-422 equipment, the T+ and T- should be one twisted pair while R+ and R­should be another.The G connection is connected to Pin 1, Frame Ground, on the RS-232 side.
RS-485 - In the 4 wire mode the Model CAT-285 has its receiver always ON and the transmitter can be controlled in one of two ways.The first is the transmitter can be enabled when the RTS or (CTS) is enables or goes high. The second method is to turn the transmitter ON when data is applied to the CAT-285 from the RS-232 device. Connection to the CAT-285 is made to the terminal block with T+ and T- being the transmit pair and R+ and R- the receive pair.When operating in the 4 wire mode T+ and T- should be one twisted pair and R+ and R- another twisted pair.
The RS-285 2 wire mode uses 1 twisted pair to transmit and receive.The CAT-285 will normally be in the receive mode or waiting for data from the RS-485 equipment. When the CAT-285 wants to transmit it uses RST or waits for date from the RS-233 to enable its transmitters, depending on the mode it is set for.The CAT-285 uses T+ and T­for its connections to the 2-wire RS-485 device.
4.0 TROUBLESHOOTING
RS-422 - To test the CAT-285 in the RS-422 mode connect T+ to R+ and T- to R-. Connect the CAT­285 to a CRT terminal set to DCE and hold down a key on the keyboard. If the converter is operating properly the TD and RD LED's will flicker and the data should appear on the CRT screen.
RS-485 - A self-test on the CAT-285 can only be performed when the unit is configured as a 4 wire device. The transmit option should be set according to your requirements. Connect T+ to R+ and T- to R- and connect the unit, in DCE mode, to a CRT Terminal. Hold down a key on the terminal and if the unit is functioning the TD & RD LED will flicker and the data entered on the keyboard will appear on the screen.
5.0 RS-232 PIN ASSIGNMENTS
PIN EIA CCITT NAME
2 BA 103 Transmit Data * 3 BB 104 Receive Data * 4 CA 105 Request to Send ** 5 CB 106 Clear to Send ** 6 CC 107 Data Set Ready *** 7 AB 102 Signal Ground Gnd 8 CF 109 Data Carrier Detect ***
20 CD 108.2 Data Terminal Ready ***
* These signals can be reversed using the selector switch. **, *** Connected together.
RS-422/RS-485
G Ground R- Receive ­R+ Receive + T- Transmit ­T+ Transmit +
When the RS-232 input signal is - (neg) or marking the T+ lead will be high and the T- will be low.To cause the RS-232 output signal to be ­(neg) or marking the R+ should be brought high and the R- should be low.
Note: When disconnected a high is a voltage between +3 and +5VDC and a low is between 0 and .8 VDC
6.0 POWER
The Model CAT-285 is powered by a small, wall mounted transformer that supplies 9 VAC @ 500 mA.
It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, human applications.
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 vibration; 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 purchaser 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.
Servicing North America:
U.S.A.: One Omega Drive, Box 4047
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Tel: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com
Canada: 976 Bergar
Laval (Quebec) H7L 5A1, Canada Tel: (514) 856-6928 FAX: (514) 856-6886 e-mail: info@omega.ca
For immediate technical or application assistance:
U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA
®
Customer Service: 1-800-622-2378/1-800-622-BEST
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Engineering Service: 1-800-872-9436/1-800-USA-WHEN
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Mexico: En Espan˜ol: (001) 203-359-7803
FAX: (001) 203-359-7807 e-mail:espanol@omega.com info@omega.com.mx
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omega.com info@omega.com
Servicing Europe:
Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic
Tel: +420 (0)59 6311899 FAX: +420 (0)59 6311114 Toll Free: 0800-1-66342 e-mail: info@omegashop.cz
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Tel: +49 (0)7056 9398-0 FAX: +49 (0)7056 9398-29 Toll Free in Germany: 0800 639 7678 e-mail: info@omega.de
United Kingdom: One Omega Drive, River Bend Technology Centre
ISO 9002 Cer
tified
Northbank, Irlam, Manchester M44 5BD United Kingdom Tel: +44 (0)161 777 6611 FAX: +44 (0)161 777 6622 Toll Free in United Kingdom: 0800-488-488 e-mail: sales@omega.co.uk
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 W
ARRANTY 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-W
ARRANTY
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 2006 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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