USER
MANUAL
MODEL 2085RC
RS-232 to RS-485 Converter:
Dual Port
Rack Mount Card
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Part# 07M2085RC-B
Doc# 047052UB
Revised 05/11/99
An ISO-9001
Certified Company
CERTIFIED
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
2.0 General Information ...............................................................4
2.1 Features
2.2 Description
3.0 Configuration..........................................................................5
3.1 Front Card Configuration
3.1.1 Switch Setting - Modem A
3.1.2 Switch Setting - Modem B
3.2 Rear Card Configuration
3.2.1 Rear Card Strap Settings
4.0 Installation ...........................................................................14
4.1 The Model 1000R16 Rack Chassis
4.1.1 The Rack Power Supply
4.2 Installing the Model 1004ARC into the Chassis
4.3 RS-232 Connection
4.4 Twisted Pair Connection
4.4.1 Point-to Point Twisted Pair Connection
4.4.2 Multipoint Twisted Pair Connection
5.0 Operation.............................................................................19
5.1 LED Status Monitors
5.2 Power-Up
Appendix A - Specifications ........................................................20
Appendix B - Cable Recommendations......................................21
Appendix C - Factory Replacement Parts..................................22
Appendix D - Interface Pin Assignments ....................................23
1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 2085RC 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 2085RC 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 2085RC has been tested and found to
comply with the limits for a Class A computing 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 2085RC
does cause interference to radio or television reception, which can be
determined by turning the power off or disconnecting the RS-232
interface, the user is encouraged to try to correct the interference by
one 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).
In the event the user detects intermittent or continuous product malfunction due to nearby high power transmitting radio frequency equipment, the user is strongly advised to take the following steps:use only
data cables with an external outer shield bonded to a metal or metalized connector; and, configure the rear card as shown in section 3.2.1
of this manual.
3 4
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). A Cer tificate of Compliance is available by contacting Technical
Support.
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:
Tel: (301) 975-1007
Email: support@patton.com.
www: http://www.patton.com
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 2085RC. Technical Service 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 during installation or
use of the 2085RC, contact Patton Electronics Technical Support at
(301) 975-1007.
2.1 FEATURES
• Convenient rack card features tw
o short range modems
• Data rates to 115.2 Kbps
• Supports up to 50 multipoint device drops in a polling environment
• Passes transmit & receive data, one control signal each direction
• Variable high/low impedance settings
• Carrier can be set as “constantly on” or “controlled by RTS”
• Able to operate with or without “echo”
• Features 6 easy-to-read LEDs
• Silicon Avalanche Diode surge protection
• Fits conveniently in Patton’s rack chassis
2.2 DESCRIPTION
The Model 2085RC RS-232 to RS-485 Interface Converter is a
dual
rack card incorporating converters. Both units support asynchronous data rates to 115.2 Kbps over 1 or 2 twisted pairs and support
distances to 9.4 miles (19 AWG @19.2 kbps). The Model 2085RC features 6 easy-to-read front panel LEDs and incorporates Silicon
Avalanche Diodes for protection against the damaging effects of nearby lightning strikes and other harmful transients.
The Model 2085RC passes one control signal in each direction
and can handle up to 50 terminal drops in a multipoint polling environment. The Model 2085RC may be configured for high or low impedance operation, carrier may be set to “constantly on”or “controlled by
RTS”. Additionally,, and the unit can operate with or without “echo”.
RTS/CTS delay may be set for “no delay” or 8 mS.
Filling one function card slot on Patton’s Model 1000R16 rack
chassis, the Model 2085RC is available with RJ-11 or RJ-45 rear interface cards. For workgroup and desktop communications, the Model
2085RC also fits in Patton’s 2, 4 and 8 slot ClusterBoxes™.
NOTE: Packages received without an RMA number will not be
accepted.
5 6
3.0 CONFIGURATION
This section describes the location and orientation of the Model
2085RC's configuration switches, provides detailed instructions on setting each switch and describes the settings for each of the rear connection cards.
3.1 FRONT CARD CONFIGURATION
The Model 2085RC front card houses interface converters –Converter “A” and Converter “B”–
each
using two sets of DIP switches.
The locations of these switches are shown in Figure 1 (below). These
switches are accessible when the card is slid out of the rack chassis.
Once configured, the Model 2085RC is designed to operate transparently, without need for frequent re-configuration.
Each of the DIP switches on the Model 2085RC function card is a
4-position switch. Figure 2 (below) shows the On/Off orientation of
these switches. Use a small screw driver or similar instrument to set
each individual switch.
3.1.1 SWITCH SETTINGS - CONVERTER “A”
DIP switches S1 and S2 configure converter A on the Model
2085RC front card. The tables below provide an overview of converter
A switch settings, including factory default settings. Following the
tables is a descriptions of each switch’s function.
SWITCH SET “S1”
DIP switch S1 is used to configure receive impedance,
RTS/CTS delay, carrier control operation and “echo” enable/disable.
The summary table below shows the factory default settings for switch
S1. Following the summary table is a detailed description of each individual switch.
S1-1: Receive Impedance
The setting for switch S1-1 selects the impedance of the input
receiver. You may select either a “low” impedance of 120 Ohms or a
“high” impedance of 16K Ohms. By selecting the proper impedance for
each drop, there may be up to 50 receivers in one application.
S1-1
Setting
On Low (120 Ohm)
Off High (16K Ohm typical)
S1-2: RTS/CTS Delay
The setting for switch S1-2 determines the amount of delay
between the time the Model 2085RC “sees” RTS and when it sends
CTS. Note: RTS/CTS Delay setting should be based upon transmission timing.
S1-2
Setting
On 8 msec
Off no delay
Figure 1. Model 2085RC board, showing location of configuration switches.
“ON”
“OFF”
Figure 2. Close-up of DIP switches, showing ON/OFF orientation.
1234
ON
S2
S1
S3
S4
SWITCH S1 SUMMARY TABLE (factory defaults in bold)
Position Function ON Position OFF Position
S1-1 RX Impedance 120 Ohm 16K Ohm
S1-2 RTS/CTS Delay 8 msec No Delay
S1-3 Carrier Control RTS Controlled Constantly On
S1-4 Echo Mode Echo ON Echo OFF
7 8
S1-3: Carrier Control
The setting for switch S1-3 determines whether the carrier is
“Constantly On” or “Controlled by RTS”. This setting allows for operation in switched carrier, multipoint and/or hardware handshaking applications.
S1-3
Setting
On Controlled by RTS
Off Constantly ON
S1-4: Echo Mode
The setting for switch S1-4 determines whether the Model 2085RC
echoes data back to the transmitting device (half-duplex mode only).
S1-4
Setting
On Echo On
Off Echo Off
SWITCH SET “S2”
DIP switch S2 is used to configure transmit impedance, and
2-wire/4-wire operations. The summary table below shows the factory
default settings for switch S2. Following the summary table is a
detailed description of each individual switch.
S2-1 and S2-2: “Transmit Off” Impedance
Switches S2-1 and S2-2 are set together to determine whether the
receiving device “sees”the impedance of the Model 2085RC’s transmitter as being “high” or “intermediate” when the transmitter is turned off.
The “intermediate” setting is useful in half-duplex environments where
the receiving device does not respond well to the “high”setting.
S2-1
S2-2 Setting
On On Intermediate Impedance
Off Off High Impedance
S2-3 and S2-4: 2-wire/4-wire Modes
Switches S2-3 and S2-4 are set together to determine whether the
Model 2085RC is in 2-wire or 4-wire operating mode. Note: 2-wire
mode is half-duplex only.
S1-2
S1-3 Setting
On On 2-wire mode
Off Off 4-wire mode
3.1.2 SWITCH SETTINGS - MODEM “B”
DIP switches S3 and S4 configure converter B on the Model
2085RC front card. The tables below provide an overview of converter
B switch settings, including factory default settings. Following each figure is a detailed description of each switch’s function.
SWITCH SET “S3”
DIP switch S3 is used to configure receive impedance, RTS/CTS
delay, carrier control operation and “echo” enable/disable. The summary table below shows the factory default settings for switch S3.
Following the summary table is a detailed description of each individual
switch.
SWITCH S2 SUMMARY TABLE (factory defaults in bold)
Position Function ON Position OFF Position
S2-1* TX OFF Impedance Intermediate High
S2-2* TX OFF Impedance Intermediate High
S2-3*
2-Wire/4-Wire 2-Wire 4-Wire
S2-4*
2-Wire/4-Wire 2-Wire 4-Wire
*Note: Switches S2-1 and S2-2 must be switched simultaneously.
Switches S2-3 and S2-4 must be switched simultaneously.
SWITCH S3 SUMMARY TABLE (factory defaults in bold)
Position Function ON Position OFF Position
S3-1 RX Impedance 120 Ohm 16K Ohm
S3-2 RTS/CTS Delay 8 msec No Delay
S3-3 Carrier Control RTS Controlled Constantly On
S3-4 Echo Mode Echo ON Echo OFF
9 10
S3-1: Receive Impedance
The setting for switch S3-1 selects the impedance of the input
receiver. You may select either a “low” impedance of 120 Ohms or a
“high” impedance of 16K Ohms. By selecting the proper impedance for
each drop, there may be up to 50 receivers in one application.
S3-1
Setting
On Low (120 Ohm)
Off High (16K Ohm typical)
S3-2: RTS/CTS Delay
The setting for switch S3-2 determines the amount of delay
between the time the Model 2085RC “sees” RTS and when it sends
CTS. Note: RTS/CTS Delay setting should be based upon transmission timing.
S3-2
Setting
On 8 msec
Off no delay
S3-3: Carrier Control
The setting for switch S3-3 determines whether the carrier is
“Constantly On” or “Controlled by RTS”. This setting allows for operation in switched carrier, multipoint and/or hardware handshaking applications.
S3-3
Setting
On Controlled by RTS
Off Constantly ON
S3-4: Echo Mode
The setting for switch S3-4 determines whether the Model 2085RC
echoes data back to the transmitting device (half-duplex mode only).
S3-4
Setting
On Echo On
Off Echo Off
SWITCH SET “S4”
DIP switch S4 is used to configure transmit impedance, and
2-wire/4-wire operations. The summary table below shows the factory
default settings for switch S4. Following the summary table is a
detailed description of each individual switch.
S4-1 and S4-2: “Transmit Off” Impedance
Switches S4-1 and S4-2 are set together to determine whether the
receiving device “sees”the impedance of the Model 2085RC’s transmitter as being “high” or “intermediate” when the transmitter is turned off.
The “intermediate” setting is useful in half-duplex environments where
the receiving device does not respond well to the “high”setting.
S4-1
S4-2 Setting
On On Intermediate Impedance
Off Off High Impedance
S4-3 and S4-4: 2-wire/4-wire Modes
Switches S4-3 and S4-4 are set together to determine whether the
Model 2085RC is in 2-wire or 4-wire operating mode. Note: 2-wire
mode is half-duplex only.
S4-2
S4-3 Setting
On On 2-wire mode
Off Off 4-wire mode
SWITCH S4 SUMMARY TABLE (factory defaults in bold)
Position Function ON Position OFF Position
S4-1* TX OFF Impedance Intermediate High
S4-2* TX OFF Impedance Intermediate High
S4-3*
2-Wire/4-Wire 2-Wire 4-Wire
S4-4*
2-Wire/4-Wire 2-Wire 4-Wire
*Note: Switches S4-1 and S4-2 must be switched simultaneously.
Switches S4-3 and S4-4 must be switched simultaneously.
11 12
3.2 REAR CARD CONFIGURATION
The Model 2085RC has two interface card options: the 1Q11
(which comes equipped with two RJ-11 ports and two RJ-45 ports) and
the 1Q45 (which comes equipped with four RJ-45 ports). Figure 3
(below) illustrates these two different rear interface options.
Prior to installation, you should examine the rear card you have
selected and ensure that it is suitable for your application. Each rear
card is configured by setting straps on the PC board. Section 3.2.1
describes the strap locations and settings for each card.
3.2.1 REAR CARD STRAP SETTINGS
Figure 4 (below) shows the strap locations for the 1Q11 and the
1Q45 rear cards. These straps determine various grounding characteristics for the RS-232 and twisted pair lines.
The table below provides a summary of strap functions for both of
the rear cards. Following the summary table is a description for each
strap function.
NOTE:†Indicates factory default setting
Line A Shield & Line B Shield (JB2 & JB4)
This strap pertains to the line interface. In the connected (closed)
position, the strap links RJ-11 pins 1 and 6 (RJ-45 pins 2 and 7) to
frame ground. These pins can be used as connections for the twisted
pair cable shield. In the open (disconnected) position, pins 1 and 6 (or
2 and 7) remain connected, but are “lifted” from frame ground.
JB2
Position 1&2 = Line A Shield Connected
Position 2&3 = No Shield
JB4
Position 1&2 = Line B Shield Connected
Position 2&3 = No Shield
SGND & FRGND (JB5)
In the connected (closed) position, this strap links signal ground
and frame ground. In the open (disconnected) position, pin 1 is “lifted”
from frame ground.
JB5
Position 1&2 = SGND and FRGND Connected
Position 2&3 = SGND and FRGND Not Connected
1Q11
1Q45
RJ-45
RJ-45
RJ-45
RJ-45
RJ-11
RJ-11
RJ-45
RJ-45
Figure 3. Model 2085RC interface card options
Twisted Pair Line
Connection
Twisted Pair
Line Connection
RS-232
Connection
RS-232
Connection
}
}
}
}
(Unit A)
JB2
JB4
JB5
JB6
JB7
(Unit B)
(Unit A)
(Unit B)
Twisted Pair Line
Connection
RS-232
Connection
}
}
Figure 4. Strap locations for both rear cards
Strap Position 1&2 Position 2&3
JB2 Line A Shield No Shield
†
JB4 Line B Shield No Shield
†
JB5 SGND & FRGND Open
†
JB6 DTE A DSR
†
N/A
JB7 DTE B DSR
†
N/A
INTERFACE CARD STRAP SUMMARY TABLE #1
1
2
3
1
2
3
1
2
3
1
123
2
3
13 14
DTE as DSR or RI (JB6 & JB7)
Because this rear card is designed to function in more applications
than the Model 2085RC, this jumper must be installed only in one position. Place the jumper across pins 1&2 so that the terminal (DTE) sees
DSR as high when the DTE raises DTR. The other positions, across
pins 2&3, are for Ring Indicate as defined by EIA/TIA-561. The RI
function is irrelevant (and on the Model 2085RC is also disconnected)
and can cause improper operation if the jumper is installed incorrectly.
JB6 & JB7
Position 1&2 = DSR
Position 2&3 = N/A
4.0 INSTALLATION
This section describes the functions of the Model 1000R16 rack
chassis, tells how to install front and rear Model 2085RC cards into the
chassis and provides diagrams for wiring up the interface connections
correctly.
4.1 THE MODEL 1000R16 RACK CHASSIS
The Model 1000R16 Rack Chassis (Figure 5) has card slots, plus
its own power supply. Measuring only 3.5” high, the Model 1000R16 is
designed to occupy only 2U in a 19” rack. Sturdy front handles allow
the Model 1000R16 to be extracted and transported conveniently.
4.1.1 THE RACK POWER SUPPLY
The power supply included in the Model 1000R16 rack uses the
same mid-plane architecture as the modem cards. The front card of
the power supply slides in from the front, and the rear card slides in
from the rear. They plug into one another in the middle of the rack.
The front card is then secured by thumb screws and the rear card by
conventional metal screws.
Figure 5. Model 1000R16 Rack Chassis with power supply
WARNING! There are no user-serviceable parts in the
power supply section of the Model 2085RC. Voltage setting changes and fuse replacement should only be performed by qualified service personnel. Contact Patton
Electronics Technical support at (301)975-1007 for more
information.
15 16
Switching the Power Supply On and Off
The power switch is located on the front panel. When plugged in
and switched on, a red front panel LED will glow. Since the Model
1000R16 is a “hot swappable” rack,
it is not necessary for any cards to
be installed before switching on the power supply
. The power supply
may be switched off at any time without harming the installed cards.
4.2 INSTALLING THE MODEL 2085RC INTO THE CHASSIS
The Model 2085RC is comprised of a front card and a rear card.
The two cards meet inside the rack chassis and plug into each other by
way of mating 50 pin card edge connectors. Use the following steps as
a guideline for installing each Model 2085RC into the Model 1000R16
rack chassis:
1. Slide the rear card into the back of the chassis along the metal
rails.
2. Secure the rear card using the metal screws provided.
3. Slide the front card into the front of the chassis. It should meet the
rear card when it's almost all the way into the chassis.
4. Push the front card
gently
into the card-edge receptacle of the rear
card. It should “click” into place.
5. Secure the front card using the thumb screws.
4.3 RS-232 CONNECTION
The RS-232 ports are always the
lower
ports on the interface card.
The 10-pin RJ-45 is pinned according Patton's Modified Modular
Interface Standard (based on the EIA/TIA-561Standard). For specific
interface pin-outs, please refer to the diagrams in Appendix D.
(continued)
The Model 2085RC is wired as a DCE (Data Communications
Equipment). Therefore, it wants to connect to a DTE (Data Termination
Equipment). If your RS-232 output device is a DTE, you may need to
use a special cable (such as a DB-25 to modular cable). If your
RS-232 output device is DCE, you will require a null modem connection. Call Patton Technical Support at (301) 975-1007 for specific
installation instructions.
4.4 TWISTED PAIR CONNECTION
The Model 2085RC operates half or full duplex over one or two
twisted pair. In
all
applications, the twisted pair wire must be 26 AWG
or thicker, unconditioned, dry, metallic wire. Both shielded and
unshielded wire yield favorable results.
4.4.1 POINT-TO-POINT TWISTED PAIR CONNECTION
The 6-position RJ-11 and 8-position RJ-45 jack options for the
Model 2085RC (always the
upper
jack on the rear interface card) are
prewired for a standard TELCO wiring environment. Pin descriptions of
the RJ-11 and RJ-45 modular jacks
RJ-11 SIGNAL RJ-45 SIGNAL
1...................GND
†
1...................N/C
2...................RCV- 2...................GND
3...................XMT+ 3...................RCV-
4...................XMT- 4...................XMT+
5...................RCV+ 5...................XMT-
6...................GND 6...................RCV+
7...................GND
8...................N/C
†
Connection to ground is optional
NOTE: Since the Model 1000R16 chassis allows
“hot swap-
ping”
of cards, it is not necessary to power down the rack when
you install or remove a Model 2085RC.
NOTE: Please refer to the Model 1000RP Series User Manual
AC and DC Rack Mount Power Supplie
s for fuse and power card
replacement information.
NOTE: The Model 2085RC can only communicate over uncon-
ditioned twisted pair wire. Dial-up analog circuits, like those in a
standard Hayes-type modem, are
not acceptable.
For further
information, see Appendix B.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
RJ-11 JACK
RJ-45 JACK
17 18
When connecting two Model 2085RCs, it is necessary to use a
crossover cable. The diagrams below show how a
twisted pair cable
should be constructed for the following environments: 4-wire RJ-11,
4-wire RJ-45, 2-wire RJ-11 or 2-wire RJ-45.
RJ-11 Cable (4-Wire)
SIGNAL PIN# PIN# SIGNAL
GND
†
1-----------------------6 GND
†
RCV- 2-----------------------4 XMTXMT+ 3-----------------------5 RCV+
XMT- 4-----------------------2 RCVRCV+ 5-----------------------3 XMT+
GND
†
6-----------------------1 GND
†
†
Connection to ground is optional
RJ-45 Cable (4-Wire)
SIGNAL PIN# PIN# SIGNAL
GND
†
2-----------------------7 GND
†
RCV- 3-----------------------5 XMTXMT+ 4-----------------------6 RCV+
XMT- 5-----------------------3 RCVRCV+ 6-----------------------4 XMT+
GND
†
7-----------------------2 GND
†
RJ-11 Cable (2-Wire)
SIGNAL PIN# PIN# SIGNAL
XMT+ 3 -----------------------3 XMT+
XMT- 4 -----------------------4 XMT-
RJ-45 Cab
le (2-Wire)
SIGNAL PIN# PIN# SIGNAL
XMT+ 4 -----------------------4 XMT+
XMT- 5 -----------------------5 XMT-
†
Connection to ground is optional
4.4.2 MULTIPOINT TWISTED PAIR CONNECTION
The Model 2085RC supports multipoint applications using a star
daisy chain topology (Section 3.0 describes proper multipoint configuration). Maximum distance between the units will vary based upon the
number of drops, data rate, wire gauge, etc. Call Patton Technical
Support for specific distance estimates. The diagram below shows how
to wire the two-pair cables properly for a Model 2085RC star topology.
Note that the ground connection is not needed.
HOST FIRST SLAVE SECOND SLAVE
XMT+ RCV+
RCV+
XMT- RCV-
RCV-
RCV+ XMT+
XMT+
RCV- XMT-
XMT-
19 20
5.0 OPERATION
Once you have configured each Model 2085RC and connected the
cables, you are ready to operate the units. Section 5.0 descr ibes the
LED status monitors and the power-up procedure.
5.1 LED STATUS MONITORS
The Model 2085RC features front panel LEDs that indicate the condition of the modem and communication link. Figure 6 (below) shows
the positions of the LEDs.
• The green “PWR” LED glows when power is applied to
the modem through its mid-plane chassis connection.
• The green “TD” and “RD” LEDs show positive state data
activity. The red “TD” and “RD” LEDs show negative state
data activity. A solid red light indicates an idle state.
• The green “CD” LED lights when the receive carrier is
detected; the red LED lights when the receive carrier is
absent.
5.2 POWER-UP
There is no power switch on the Model 2085RC: Power is automatically applied to the 2085RC when its card-edge connector touches the
chassis’ mid-plane socket, or when the chassis’power is turned on.
APPENDIX A
PATTON ELECTRONICS MODEL 2085RC
SPECIFICATIONS
Transmission Format: Asynchronous
Data Rate: 0 to 115.2 Kbps
Control Signals: DSR turns “ON” immediately after the
terminal raises DTR; DCD tur ns “ON”
after recognizing the receive signal
from the line; CTS turns on after the
terminal raises RTS
Transmission Line: 2-wire or 4-wire, unconditioned twisted
pair
Transmit Mode: Full or half duplex
Transmit Level: 2V ± 10% differential output voltage
Carrier: Constantly on or controlled by RTS
RTS/CTS Delay: 8 msec or zero
Echo Mode: Echo and No Echo, supported in both
2-wire and 4-wire modes
Receiver Impedance: Low (120 ohms), High (100k Ohms)
Line Connection: RJ-11 or RJ-45 jack
Surge Protection: Compliant with IEC 801.5 level 2,
1kV
Power Supply: Rack-mount power supply is
switchable between 120V and 240V
AC; rack chassis supplies 10V AC to
the Model 2085RC, typical
consumption is 700 mW per card
Fuse: 400mA for 120V applications; 200mA
for 240V applications
Temperature Range: 0-50°C (32-122°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% non-condensing
Dimensions: 0.95”w x 3.1”h x 5.4”l
Figure 6. The Model 2085RC front panel, showing LED positions
NOTE: The 2085RC is a “hot swappable”card—it will not be
damaged by plugging it in or removing it while the rack is powered up.
Model 2085RC
Power
TD
Unit
RD
A
CD
TD
Unit
B
RD
CD
21 22
APPENDIX B
PATTON ELECTRONICS MODEL 2085RC
CABLE RECOMMENDATIONS
The Patton Model 2085RC operates at frequencies of 115kHz or
less and has been performance tested by Patton technicians using
twisted-pair cable with the following characteristics:
Wire Gauge Capacitance Resistance
19 AWG 83nf/mi or 15.72 pf/ft. .0163 Ohms/ft.
22 AWG 83nf/mi or 15.72 pf/ft. .0326 Ohms/ft.
24 AWG 83nf/mi or 15.72 pf/ft. .05165 Ohms/ft.
26 AWG 83nf/mi or 15.72 pf/ft. .08235 Ohms/ft.
Using or simulating cable with the above characteristics, the following data rate/distance results were obtained by Patton during bench
tests:
To gain optimum performance from the Model 2085RC, please keep
the following guidelines in mind:
•
Always
use twisted pair wire—this is not an option.
• Use twisted pair wire with a capacitance of 20pf/ft or less.
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid higher
AWG numbers than 26)
• Use of twisted pair with a resistance greater than the above specifications may cause a reduction in maximum distance obtainable.
Functionality should not be affected.
• Many environmental factors can affect the maximum distances
obtainable at a particular site. Use the above data rate/distance
table as a
general guideline only.
APPENDIX C
PATTON ELECTRONICS MODEL 2085RC
FACTORY REPLACEMENT PARTS
The Patton Model 2085RC rack system features interchangeable
rear half cards, power cords/fuses for international various operating
environments and other user-replaceable parts. Model numbers and
descriptions for these parts are listed below:
Patton Model # Description
1000RPEM..........................120/240V Rear Power Entry Module
1000RPSM-2.......................120/240V Front Power Supply Module
1000RPEM-DC ...................DC Rear Power Entry Module
1000RPSM-48A..................48V Front Power Supply Module
1000RPEM-V......................120/240V CE Compliant Rear Power
Entry Module
1000RPEM-V......................120/240V CE Compliant Rear Power
Supply Entry Module
0805US...............................Amer ican Power Cord
0805EUR.............................European Power Cord CEE 7
0805UK...............................United Kingdom Power Cord
0805AUS.............................Australia/New Zealand Power Cord
0805DEN.............................Denmark Power Cord
0805FR ...............................France/Belgium Power Cord
0805IN.................................India Power Cord
0805IS.................................Israel Power Cord
0805JAP..............................Japan Power Cord
0805SW ..............................Switzerland Power Cord
0516FPB1...........................Single Width Blank Front Panel
0516FPB4...........................4-Wide Blank Front Panel
0516RPB1...........................Single Width Blank Rear Panel
0516RPB4...........................4-Wide Blank Rear Panel
MODEL 2085RC Distance Table- Miles (Km)
Wire Gauge
19 AWG 22 AWG 24 AWG 26 AWG
(.9mm) (.6mm) (.5mm) (.4mm)
115.2 3.5
(5.6) 2.6 (4.2) 1.4 (2.2) 0.9 (1.4)
38.4 5.0 ( 8.0) 2.9 (4.7) 2.2 (3.5) 1.5 (2.4)
9.6 7.1 (11.4) 4.6 (7.4) 3.5 (5.6) 2.8 (4.5)
1.2 9.0 (14.5) 6.5 (10.5) 5.0 (8.0) 3.9 (6.3)
Data Rate
(kbps)
23
APPENDIX D
PATTON ELECTRONICS MODEL 2085RC
INTERFACE PIN ASSIGNMENTS
Copyright © 1997
Patton Electronics Company
All Rights Reserved
PATTON MODULAR INTERFACE - 10 Wire RJ-45
Contact Number Circuit Description
1 N/A Not Used
2 125 DSR
3 109 Received Line Signal Indicator (CD)
4 108 / 2 DTE Ready (DTR)
5 102 Signal Common
6 104 Received Data
7 103 Transmitted Data
8 106 Clear to Send
9 105 / 133 Request to Send / Ready for Receiving
10 N/A Not Used
Pins 2-9 conform to the EIA/TIA-561 eight position non-synchronous interface standard.
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