USER
MANUAL
MODELS 593/25, 593/45
and 593/TB
RS-422/RS-485
Optical Isolators
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Part# 07M593
Doc# 055041U Rev. A
Revised 07/05/00
An ISO-9001
Certified
Company
15
APPENDIX B
PATTON ELECTRONICS MODEL 593 SERIES
EIA-530 PIN CONFIGURATIONS
Copyright © 1999
Patton Electronics Company
All Rights Reserved
7- Signal Ground
3-(RD) Receive Data-A From Model 593 Series
2-(TD) Transmit Data-A To Model 593 Series
From Model 593 Series Transmit Data-B (RD)-14
DIRECTION “DCE” SETTING DIRECTION
To Model 593 Series Receive Data-B (RD)-16
1 2
TABLE OF CONTENTS
SECTION PAGE
1.0 Warranty Information.............................................................2
1.1 Radio and TV Interference
1.2 CE Notice
1.3 Service Information
2.0 General Information...............................................................4
2.1 Features
2.2 Description
3.0 Cofiguration ............................................................................5
3.1 Dip Switch S2 & S3 Location
3.1.1 Configuration DIP Switches Sets S2 & S3
3.1.2 Four-Wire Full Duplex Operation (factory default)
3.1.3 Two-Wire Half Duplex Operation
3.1.4 Four-Wire Half Duplex
3.2 JP7 & JP8 Strap Locations
3.3 Data Rates Dip Switch Setting S2 and S3
4.0 Installation .............................................................................9
4.1 Connecting to The RS-422 or Rs-485 Interface
4.1.1 4-Wire Connection Using RJ-45
4.1.2 2-Wire Connection Using RJ-45
4.1.3 4-Wire Connection Using Terminal Blocks
4.1.4 2-Wire Connection using Terminal Blocks
4.1.5 4-Wire Connection Using DB-25
4.1.6 2-Wire Connection Using DB-25
4.2 Operating the Model 593 Series
Appendix A - Specifications ........................................................14
Appendix B - RS-232 Pin Assignments......................................15
1.0 WARRANTY INFORMATION
Patton Electronics
warrants all Model 593/25, 593/45, and 593/TB
components to be free from defects, and will—at our option—repair or
replace the product should it fail within one year from the first date of
shipment.
This warranty is limited to defects in workmanship or materials,
and does not cover customer damage, abuse or unauthorized modification. If this product fails or does not perform as warranted, your sole
recourse shall be repair or replacement as described above. Under no
condition shall Patton Electronics be liable for any damages incurred
by the use of this product. These damages include, but are not limited
to, the following: lost profits, lost savings and incidental or consequential damages arising from the use of or inability to use this product.
Patton Electronics specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall
be deemed an acceptance of these terms by the user.
1.1 RADIO AND TV INTERFERENCE
The Model 593/25, 593/45, and 593/TB generates and uses radio
frequency energy, and if not installed and used properly—that is, in
strict accordance with the manufacturer's instructions—may cause
interference to radio and television reception. The Model 593/25,
593/45, and 593/TB has been tested and found to comply with the limits for a Class Acomputing device in accordance with the specifications
in Subpart J of Part 15 of FCC rules, which are designed to provide
reasonable protection from such interference in a commercial installation. However, there is no guarantee that interference will not occur in
a particular installation. If the Model 593/25, 593/45, and 593/TB does
cause interference to radio or television reception, which can be determined by disconnecting the RS-485 interface, the user is encouraged
to try to correct the interference by one or more of the following measures: moving the computing equipment away from the receiver, re-orienting the receiving antenna and/or plugging the receiving equipment
into a different AC outlet (such that the computing equipment and
receiver are on different branches).
1.2 CE NOTICE
The CE symbol on your Patton Electronics equipment indicates
that it is in compliance with the Electromagnetic Compatibility (EMC)
directive and the Low Voltage Directive (LVD) of the Union European
(EU). ACertificate of Compliance is available by contacting Technical
Support.
3 4
1.3 SERVICE
All warranty and nonwarranty repairs must be returned freight prepaid and insured to Patton Electronics. All returns must have a Return
Materials Authorization number on the outside of the shipping container. This number may be obtained from Patton Electronics Technical
Support at:
telephone: (301) 975-1007
email: support@patton.com
web address: http://www.patton.com
NOTE: Packages received without an RMA number will not be
accepted.
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Patton Model 593/25, 593/45, and 593/TB. Technical Support hours:
8AM to 5PM EST, Monday through Friday.
2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is warranted for One Year parts and labor. If any questions or problems arise
during installation or use of this product, please do not hesitate to contact Patton Electronics Technical Services at (301) 975-1007.
2.1 FEATURES
• Asynchronous Operation
• Half or Full Duplex over 2 or 4 wire lines
• Maximum cable length 4000 ft.
• Supports Data rates to 115.2 kbps
• 2500 Vrms isolation
2.2 DESCRIPTION
The Patton Models 593/25F, 593/45 and 593/TB are asynchro-
nous RS-422/RS-485 optical isolators, which guard your asynchronous
data equipment from the hazards of ground looping. All Models have
selectable Dip switch settings for RS-422/RS-485 applications. The
Model 593 series provides 2500Vrms of isolation and supports data
rates up to 115.2 kbps. Models 593/25F/45/TB are powered by an
external +5V regulated power supply.
The Models 593/25F, 593/45, and 593/TB isolates transmit data
(XMT+ and XMT-) and receive data (RCV+ and RCV-). The model
593/45 has a RJ-45 on both sides, the model 593/TB has a terminal
block on both sides and the model 593/25F has DB-25 female connectors on both sides.
Warning: This product will not provide complete protection should your
equipment or building be subject to a direct lightening hit.
5 6
3.0 CONFIGURATION
The Models 593/25F, 593/45, and 593/TB feature configuration via hardware switches and headers. This section describes all possible hardware configurations, including the factory default settings. Table 1 below summarizes configuration of switches and headers for the Model l 593/25F, 593/45, and 593/TB.
3.1 DIP SWITCH S2 & S3
The Models 593/25F, 593/45, and 593/TB feature two eight-position Dip
switches (S2 and S3). These switches are accessed by opening the plastic
case by inserting a small flat blade screwdriver in the slot on either side of the
case and twisting gently. Figure 1A, below shows Models 593/TB & 593/45
bottom view of the printed circuit board and the location of the dip switches.
Figure 1B shows Model 593/45 bottom view of the printed circuit board and the
location of the DIP switches
The Models 593/25F, 593/45, and 593/TB switches (S2-1 thru S2-8 &
S3-1 thru S3-8) can be configured as either “On” or “Off”. Figure 2 shows the
orientation of the DIP switches with respect to ON/OFF positions.
3.1.1 Configuration DIP Switches Sets S2 and S3
The two eight-position Dip switches are used to configure the units for
common asynchronous data rates, full or half duplex over 2-wire/4-wire twisted
pair. The following sections describe all the possible configurations.
Figure 2. Close up of DIP switches showing ON/OFF positions.
The switch is shown in the Off position.
NOTE: When selecting any hardware configurations
below, Switch S2 and Switch S3 must be set the same.
S3
ON
OFF
S2
ON
OFF
Figure 1B. Model 593/25, location of S2 &
S3 on Printed Circuit Board
S2
ON
OFF
S3
ON
OFF
Figure 1A. Models 593/TB & 593/45, location
of S2 & S3 on Printed Circuit Board
Position Function ON/OFF Full Duplex Half Duplex Half Duplex
S2-1 TX Mode HD/FD OFF ON ON
S2-2 Operation 422/485 ON OFF OFF
S3-1 TX Mode HD/FD OFF ON ON
S3-2 Operation 422/485 ON OFF OFF
S1-1,2 Interface 2W/4W OFF ON OFF
S1-3 RX IMP. 120 /HI ON ON ON
S1-4 Not Used ( ) X X X
S4-1, 2 Interface 2W/4W OFF ON OFF
S4-3 RX IMP. 120 /HI ON ON ON
S4-4 Not Used ( ) X X X
Table 1. Configuration summary of swithes and headers
Switch Mode 422 4W 485 2W 485 4W
Ω
Ω
Typical Application Settings
3.1.2 Full/Half Duplex S2-1 and S3-1
Switches S2-1 and S3-1 determine full duplex or half duplex transmission mode.
3.1.3 422/485 Operation S2-2 and S3-2
Switches S2-2 and S3-2 determine RS-422 or RS-485 interface
operation.
Half Duplex Full Duplex
S2-1 ON OFF
S3-1 ON OFF
RS-422 RS-485
S2-2 ON OFF
S3-2 ON OFF
7
8
3.2 DIP Switch S1 & S4
The Models 593/25F, 593/45, and 593/TB features 2 four-position DIP
switches S1 and S4. Figure 3A (below) shows Models 593/TB & 593/45 top
view of the printed circuit board and where S1 and S4 are located. Figure 3B
shows Model 593/25 top view of the printed circuit board and the position of S1
and S4. Following figure 3A/3B is a detailed description on the different switch
settings and their functions.
3.3 Data Rates DIP Switch Setting S2 and S3
The table below shows the data rates DIP switch settings for S2 and S3.
Switches S2 and S3 must be set identically to operate properly.
S4
S1
Figure 3A. Models 593/TB & 593/45 Location of JP7 Pins 1-4 & JP8 Pins 1-4
Figure 3B. Model 593/25, Location of JP7 Pins 1-4 & JP8 Pins 1-4
Model 593 Series Data Rate Table
Switch Positions
Data Rates
S2 Position S3 Position 4800 bps 9600 kbps 19.2 kbps
S2-3 S3-3 OFF OFF OFF
S2-4 S3-4 OFF OFF OFF
S2-5 S3-5 OFF OFF OFF
S2-6 S3-6 OFF OFF ON
S2-7 S3-7 OFF ON OFF`
S2-8 S3-8 ON ON OFF
Model 593 Series Data Rate Table (continued)
Switch Positions
Data Rates
S2 Position S3 Position 38.4 kbps 57.6 kbps 115.2 kbps
S2-3 S3-3 OFF OFF ON
S2-4 S3-4 OFF ON ON
S2-5 S3-5 ON OFF OFF
S2-6 S3-6 OFF OFF OFF
S2-7 S3-7 OFF OFF OFF`
S2-8 S3-8 OFF OFF OFF
S1
S4
3.2.1 2W/4W Interface S1-1, 2 and S4-1, 2
Switches S1-1, 2 and S4-1, 2 set up the interface for 2 wire or 4 wire
operation.
3.2.2 Receive Impedance S1-3 and S4-3
Switches S1-3 and S4-3 set the receive impedance for 120 Ohms or
high impedance.
2 Wire 4 W
ire
S1-1, 2 ON OFF
S4-1, 2 ON OFF
120 Ohm High Impedance
S1-3 ON OFF
S4-3 ON OFF
9 10
4.0 INSTALLATION
Once you have properly set the configuration switches and
jumpers, you are ready to connect Models 593/25F, 593/45, or 593/TB
to your system. This section tells you how to connect the interfaces
and how to operate your Model 593/25F, 593/45, or 593/TB.
4.1 CONNECTING TO THE RS-422 OR RS-485 INTERFACE
To function properly, the Models 593/25F, 593/45, and 593/TB
must have one or two pair of twisted pairs of metallic wire. These pairs
must be “dry” (unconditioned) metallic wire between 19 and 26 AWG.
The 593 Series has three physical interfaces as listed below.
Following the list is figure 4, which shows the location of the physical
interfaces.
1. Model 593/45: RJ-45 jacks on both sides
2. Model 593/TB: Terminal blocks with strain relief on both sides
3. Model 593/25F: DB-25 female connectors on both sides.
4.1.1 4-Wire Connection Using RJ-45
The RJ-45 connectors on the Model 593/45 are pre-wired for a
standard TELCO wiring enviroment. The signal/pin relationships are
shown below.
RJ-45
SIGNAL
1 ......................................N/C
2 ......................................GND*
3 ......................................RCV-
4 ......................................XMT+
5 ......................................XMT-
6 ......................................RCV+
7 ......................................GND*
8 ......................................N/C
*Connection to ground is optional
In most modular RS-422/RS-485 applications it is necessary to
use a "cross over" cable. The diagram below shows how a cross over
cable should be constructed for an environment where the Model
593/45 and the RS-422/RS-485 device uses a 8-wire RJ-45 connector.
Similar logic should be followed when using RJ-45 connectors or a
combintion of the two.
MODEL 593/45 RS-422/485 DEVICE
SIGNAL PIN# PIN# RS-422/485 SIGNAL
NC 1 -------------------N/C
GND 2-------------------N/C
RCV- 3-------------------5 XMTXMT+ 4 -------------------6 RCV+
XMT- 5-------------------3 RCVRCV+ 6 -------------------4 XMT+
GND
†
7 -------------------N/C
N/C 8-------------------N/C
1
2
3
4
5
6
7
8
11 12
4.1.2 2-Wire Connection Using RJ-45
Most RS-485 devices employ a two-wire, half duplex configuration.
When using this configuration, be sure to first set the Model 593/45 to
half duplex mode by switching DIP switches and jumpers (refer to section 3.0 for this configuration)—then use
only the transmit (XMT) pair
as shown below
593/45
SIGNAL RS-485 SIGNAL
XMT+ ....................................+
XMT-.....................................-
4.1.3 4-Wire Connection Using Terminal Blocks
If you purchased the Model 593/TB, you will need to open the
case to access the terminal blocks. The following instructions will tell
you how to open the case, connect the bare wires to the terminal
blocks, and fasten the strain relief collar in place so that the wires
won't pull loose.
1. If the case is not already open, open it now by twisting it open
with a small plastic screwdriver.
2. Strip the outer insulation from the twisted pairs about one inch
from the end.
3. Strip back the insulation on each of the 2 twisted pair wires
about .25 inch.
4. Place the cable through the end plate, and make a small loop
in the cable and feed the cable under the tie wrap which is currently installed in the board. When you have completed this
assembly it should resemble figure figure 5. Connect
one pair
of wires to XMT+ and XMT- (transmit positive and negative)
on the terminal block, making careful note of which color is
positive, and which color is negative.
5. If you are using 4-wire mode, connect the other pair of wires to
RCV+ and RCV- (receive positive and negative) on both of the
terminal blocks, again making careful note of which color is
positive, and which is negative.
Ultimately, you will want to construct a four pair cross over cable
that makes a connection with the RS-422/485 device, as shown below.
Model
593/TB RS-422/-485 Device
SIGNAL TERMINAL BLOCK SIGNAL
TXB+ TB (5) RXB+
TXA- TB (4) RXARXB+ TB (1) TXB+
RXA- TB (2) TXA-
4.1.4 2-Wire Connection Using Terminal Blocks
Most RS-485 devices employ a two-wire, half duplex configuration.
When using this configuration, be sure to first set the Model 593/TB to
half duplex mode by switching DIP switches and jumpers (refer to section 3.0 for this configuration)—then use
only the transmit (XMT) pair
as shown below
Model
593/TB RS-485 Device
XMT+ .......................... +
XMT- ............................ -
Figure 5. Model 593/TB, showing Terminal Block & Cable Routing
13 14
4.1.5 4-Wire Connection Using DB-25
Most DB-25 connectors on the Model 593/25F conform to EIA-530
interface standards. When connecting to the RS-422/485 devices
which also conform to EIA-530 standards, your cable should have
crossed over wiring, as shown below.
Model 593/TB
RS-485
SIGNAL DB-25 PIN DB-25 PIN SIGNAL
TXA+ 2 3 RXA+
TXB- 14 16 RXB-
RXA+ 3 2 TXA+
RXB- 16 14 TXB-
4.1.6 2-Wire Connection Using DB-25
Most DB-25 connectors on the Model 593/25F conform to EIA-530
interfaces standards. The RS-422/485 devices also conform to EIA-530
requirements and when connecting these devices, follow the wiring
shown below.
Model 593/25F
RS-485
SIGNAL DB-25 PIN SIGNAL
TXA 2 +
TXB 14 -
4.2 OPERATING THE MODELS 593 SERIES
Once the Models 593/25F, 593/45, and 593/TB are properly configured
and installed, it should operate transparently
___
as if it were a standard cable con-
nection. Plug in the external power supply and the units will be powered up.
APPENDIX A
PATTON ELECTRONICS MODEL 593/25, 593/45, and 593/TB
SPECIFICATIONS
Transmission Format: Asynchronous, full or half duplex
Interface Standard: RS-422/RS-485
Connectors: Model 593/25F; DB-25 female on
both sides
Model 593/45; RJ-45 on both sides
Model 593/TB; Terminal block on
both sides
Data Rates: Up to 115.2 kbps
Power Supply: External wall-mount transformer,
Regulated +5 VDC @ 120mA
Isolation: 2500 Vrms/optical Isolation
Dimensions: Model 593/45 & 593/TB
3.8”L x 2.1”W x 0.79”H
Model 593/25
4.1”L x 2.1”W x 0.79H
Temperature Range: 0-60
°
C (32-140°F)
Altitude: 0-10,100 feet
Humidity: 5 to 95% noncondensing
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