Omega Products DP8485-N Installation Manual
DPA1200, DPA1232, DPA1485,
DPA7485-I, DPA7485-N
DPA8008, DPA8232-N,
DPA8485-I, & DP8485-N
Serial Communication
Converters & Adapters
Serial Communication Converters & Adapters Instruction Manual
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Serial Communication Converters & Adapters Instruction Manual
W
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.
RETURN REQUEST/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.
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 2012 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.
ARRANTY/DISCLAIMER
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.
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Serial Communication Converters & Adapters Instruction Manual
ORDERING INFORMATION
Model Description
DPA1200 Meter Copy Cable, 3' (0.9 m)
DPA1232 RS-232 Serial Adapter
DPA1485 RS-485 Serial Adapter
DPA7485-I RS-232 to RS-422/485 Isolated Converter
DPA7485-N RS-232 to RS-422/485 Non-Isolated Converter
DPA8008 USB Serial Adapter
DPA8232-N USB to RS-232 Non-Isolated Converter
DPA8485-I USB to RS-422/485 Isolated Converter
DPA8485-N USB to RS-422/485 Non-Isolated Converter
DP6000-SOFT
DP6000-SOFT Software for Meters
FREE Download available at www.omega.com
SAFETY INFORMATION
!
CAUTION: Read complete
instructions prior to installation and operation of the
equipment.
WARNING
WARNING: Risk of
electric shock.
Hazardous voltages could exist on serial communication wiring
networks. Installation and service should be performed only by
trained service personnel.
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Serial Communication Converters & Adapters Instruction Manual
Table of Contents
ORDERING INFORMATION --------------------------------------------- 4
SAFETY INFORMATION ------------------------------------------------- 4
SPECIFICATIONS ---------------------------------------------------------- 7
DPA1232 RS-232 Serial Adapter --------------------------------------------- 7
DPA1485 RS-485 Serial Adapter --------------------------------------------- 7
DPA7485 RS-232 to RS-422/485 Converter ------------------------------ 7
DPA8008 USB Serial Adapter ------------------------------------------------- 8
DPA8232 USB to RS-232 Converter ---------------------------------------- 8
DPA8485 USB to RS-422/485 Converter ---------------------------------- 8
SERIAL COMMUNICATIONS OVERVIEW -------------------------- 9
DPA1232 RS-232 SERIAL ADAPTER ------------------------------- 11
Description ----------------------------------------------------------------------- 11
Installation ------------------------------------------------------------------------ 12
Connections -------------------------------------------------------------------- 13
Serial Communication Address (serial) ------------------------------ 13
DPA1485 RS-485 SERIAL ADAPTER ------------------------------- 14
Description ----------------------------------------------------------------------- 14
Installation ------------------------------------------------------------------------ 15
Serial Communication Address (serIAl) ------------------------------ 15
Connections -------------------------------------------------------------------- 18
DPA7485 RS-232 TO RS-422/485 CONVERTER ----------------- 19
Description ----------------------------------------------------------------------- 19
Installation ------------------------------------------------------------------------ 20
Connections -------------------------------------------------------------------- 21
DPA8008 TO USB SERIAL ADAPTER ------------------------------ 22
Description ----------------------------------------------------------------------- 22
Installation ------------------------------------------------------------------------ 22
DPA8232 USB TO RS-232 CONVERTER -------------------------- 23
Description ----------------------------------------------------------------------- 23
DPA8485 USB TO RS-422/485 CONVERTER --------------------- 24
Description ----------------------------------------------------------------------- 24
Installation ------------------------------------------------------------------------ 25
Connections -------------------------------------------------------------------- 26
TROUBLESHOOTING ---------------------------------------------------- 27
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Serial Communication Converters & Adapters Instruction Manual
Table of Figures
Figure 1. General Four-Wire Network Connection .......................... 10
Figure 2. General Two-Wire Network Connection ........................... 10
Figure 3. RS-232 Adapter Connections ............................................ 12
Figure 4. RS-422 or RS-485 Wiring ................................................... 16
Figure 5. RS-485 Two-Wire Multi-Drop Wiring ................................. 17
Figure 6. Connections for DPA1485 to Serial Converter ................. 18
Figure 13. DPA7485 Terminal Connectors and DIP Switch ............ 20
Figure 14. DPA7485 DIP Switch Settings ......................................... 20
Figure 16. Connections for DPA7485 in a Four-Wire Network ....... 21
Figure 17. Connections for DPA7485 in a Two-Wire Network ........ 21
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Serial Communication Converters & Adapters Instruction Manual
SPECIFICATIONS
DPA1232 RS-232 Serial Adapter
COMPATIBILITY EIA-232
CONNECTORS PC compatible 9-pin D subminiature connector (DB9) and
CABLE 6' (1.8 m) standard Cat5e cable provided with adapter
DISTANCE Adapter to meter: 6' (1.8 m) max; Adapter to computer: 50'
POWER Powered by meter M-Link connection
STATUS
INDICATION
DPA1485 RS-485 Serial Adapter
COMPATIBILITY EIA-485
CONNECTORS Removable screw terminal connector and RJ11 (adapter to
CABLE 6' (1.8 m) standard Cat5e cable provided with adapter
DISTANCE Adapter to meter: 6' (1.8 m) max; Adapter to computer:
POWER Powered by meter M-Link connection
STATUS
INDICATION
RJ45 (adapter to meter)
(15 m) max; serial interface cable not provided
Separate LEDs for Power (P), Transmit (TX), and
Receive (RX)
meter)
3,937' (1,200 m) max
Separate LEDs for Power (P), Transmit (TX), and
Receive (RX)
DPA7485 RS-232 to RS-422/485 Converter
COMPATIBILITY EIA-232, EIA-422, and EIA-485
CONNECTORS Screw terminal connector and DB9
DISTANCE RS-232 connection: 50' (15 m) max; RS-422/485 connec-
NUMBER OF
UNITS
POWER 9-12 VDC; 115 VAC/12 VDC adapter included
STATUS
INDICATION
ISOLATION DPA7485-I: 1500 VAC between data lines; 700 VDC
DPA7485-N: 1500 VAC between data lines only
tion: 3,937' (1,200 m) max
Up to 31 RS-485 compatible devices
Separate LEDs for Power (P), Transmit (TX), and
Receive (RX)
input/output-to-power
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Serial Communication Converters & Adapters Instruction Manual
DPA8008 USB Serial Adapter
COMPATIBILITY USB 1.1, USB 2.0
CONNECTORS RJ45, and USB Type B
CABLE One 6' (1.8 m) standard Cat5e cable and one 3.28’ (1.0 m)
DISTANCE Adapter to meter: 6' (1.8 m) max. USB connection: 10' (3
DRIVER Windows 98/SE, ME, 2000, Server 2003/2008, XP 32/64-
POWER USB Port
STATUS
INDICATION
USB A-B Male cable provided with adapter
m) max
Bit, Vista 32/64-Bit, Windows 7 32/64-Bit
Separate LEDs for Power (P), Transmit (TX), and Receive
(RX)
DPA8232 USB to RS-232 Converter
COMPATIBILITY USB 1.1, USB 2.0, EIA-232
CONNECTORS PC compatible 9-pin D subminiature connector (DB9) and
DRIVERS Windows® 98/2000/ME/XP
DISTANCE USB connection: 10' (3 m) max; RS-232 connection: 50'
POWER USB port
USB Type A
(15m) max
DPA8485 USB to RS-422/485 Converter
COMPATIBILITY USB 1.1, USB 2.0, EIA-422, and EIA-485
CONNECTORS Screw terminal connector and USB Type B
DRIVERS Windows® 98/2000/ME/XP, Linux 2.4 & greater
DISTANCE USB connection: 10' (3 m) max; RS-422/485 connection:
NUMBER OF
UNITS
POWER USB port
STATUS
INDICATION
ISOLATION DPA8485-I: 1500 VAC between data lines; 700 VDC
DPA8485-N: 1500 VAC between data lines only
3,937' (1,200 m) max
Up to 31 RS-485 compatible devices
Separate LEDs for Power (P), Transmit (TX), and
Receive (RX)
input/output-to-power
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Serial Communication Converters & Adapters Instruction Manual
SERIAL COMMUNICATIONS OVERVIEW
RS-232, RS-422, and RS-485 are standard interfaces approved by the
Electronic Industries Alliance (EIA) for connecting serial devices. In EIA
terms, the device (e.g. meter) that connects to the interface is called a
Data Communications Equipment (DCE) and the device to which it connects (e.g. the computer) is called a Data Terminal Equipment (DTE).
The RS-422 standard was designed to replace the older RS-232 standard because it supports higher data rates and greater immunity to electrical interference. RS-485 is similar to RS-422 but can support multipoint connections per line because it uses lower-impedance drivers and
receivers.
Line drivers and receivers are used to exchange data between two or
more points (nodes) on a serial communications network. Reliable data
communications can be difficult in the presence of induced noise,
ground level differences, and other hazards associated with installation
of a network. When communicating at high data rates, or over long distances in real world environments, RS-232 is often inadequate. The
differential data transmission of RS-422 and RS-485 offers superior
performance in most applications. Differential signals can help nullify the
effects of ground shifts and induced noise signals that can appear as
common mode voltages on a network.
RS-422 was designed for greater distances and higher baud rates than
RS-232. In its simplest form, a pair of converters from RS-232 to
RS-422 (and back again) can be used to form an "RS-232 extension
cord". Data rates of up to 100 kbits/second and distances of 3,937'
(1,200 m) can be accommodated with RS-422.
RS-422 devices however cannot be used to construct a true multi-point
network. A multi-point network consists of multiple drivers and receivers
connected on a single bus, where any point (node) can transmit and/or
receive data. RS-485 is an enhanced version of the RS-422 standard,
which allows multiple drivers and receivers on the same two-wire or
four-wire system. The RS-485 standard specifies up to 32 drivers and
32 receivers on a single bus, but with the introduction of "automatic"
repeaters and high-impedance drivers/receivers, this number can be
extended to hundreds of points (nodes) on a network.
The cabling used for an RS-422 or RS-485 serial communications
network should always be a high quality cable such as Belden 8162 or
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