Patton 2020RC User Manual

USER
MANUAL

MODEL 2020RC

Miniature RS-232 to V.35
Interface Converter:
Rack Mount Card

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
http://www.patton.com

An ISO-9001

Certified Company

Part# 07M2020RC-B
Doc# 077121U
Rev. C
Revised 1/22/08

,

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 2020RC 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 2020RC 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 2020RC 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 2020RC does cause interference to radio or television
reception, which can be determined by turning the power off or
disconnecting the unit, 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).

If the user detects intermittent or continuous product malfunction
due to nearby high power transmitting radio frequency equipment, the
user is advised to use data cables with an external outer shield bonded
to a metal or metalized connector, and to configure the rear card as
shown in Section 3.2 of this manual.

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1.2 SERVICE

All warranty and non-warranty 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 Service at [phone]; http://www.patton.com; or
[email protected].

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
Model 2020RC. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

1.3 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 Certificate of Compliance is available by contacting Technical
Support.

2

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 Support at [phone].

2.1 FEATURES

• Synchronous operation, full or half duplex

• Allows an RS-232 DCE

to communicate bi-directionally with a

V.35 DTE

• Allows an RS-232 DTE to communicate bi-directionally with a
V.35 DCE

• Data rates up to 384 kbps

• DCE/DTE strap selectable

• Front panel LED indicators monitor seven parameters

• Dual UD-26 Connectors on rear card

• Fits in Patton’s rack chassis and Cluster Boxes

• Made in the USA

2.2 DESCRIPTION

The Patton Model 2020RC Interface Converter Rack Card lets a

synchronous RS-232 device communicate bi-directionally with a
synchronous V.35 device. Operating full or half duplex, the Model
2020RC is protocol independent and supports data rates to 384 kbps.

An internal DCE/DTE strap allows the user to configure the Model
2020RC as "DCE to DTE" or "DTE to DCE". In most cases, this
eliminates the need for special crossover cables. The Model 2020RC
uses Patton’s mid-plane architecture and is equipped with dual UD-26
connectors on the rear interface card (adapter cables are available from
Patton Electronics).

The Model 2020RC is designed to mount in Patton’s 2U high 19”
rack chassis and 2/4/8 slot Cluster Boxes. Available power supplies
include 120/230V AC and 48/24/12V DC. The Model 2020RC is made
in the USA.

3

3.0 CONFIGURATION

This section describes the location and orientation of the Model
2020RC's configuration straps, and details all possible settings. This
section also identifies factory default configuration settings.

3.1 FRONT CARD CONFIGURATION

The Model 2020RC installs between DTE devices such as terminals
and host computers, and DCE devices such as modems, multiplexers
and CSU/DSUs. Most often the DTE device will be RS-232, and the
DCE device will be V.35. Therefore, the default DCE/DTE setting for
the Model 2020RC is RS-232 DCE to V.35 DTE, based on how the
Model 2020RC "sees" its

own

orientation. For example, if the Model
2020RC sees its own RS-232 port as DCE, it will want to plug into an
RS-232 DTE device such as a terminal.

The DCE/DTE strap is located near the rear of the Model 2020RC
front card’s PC board (see Figure 1, below). The arrows on the strap,
and on the PC board itself, indicate the configuration of the Model
2020RC. For example, if the “DCE” arrows on the strap are pointing
toward the front of the card (with the “DTE” arrows pointing toward the
rear), then the Model 2020RC is wired so that the RS-232 port is a DCE
and the V.35 port is a DTE. You can confirm this by reading the “RS­232” and “V.35” arrows on the PC board.

To reverse the DCE/DTE orientation of the Model 2020RC, remove the
strap and rotate it 180

0

. Confirm the orientation by checking the arrows

on the strap and on the PC board.

Figure 1. Model 2020RC front card, showing location of the DCE/DTE strap.

4

DCE/DTE strap

DTE

➨

➨

➨

➨

RS-232

V.35

3.2 REAR CARD CONFIGURATION

The rear interface card for the Model 2020RC is equipped with two
female UD-26 connectors: one for each port. This card has one
configuration jumper (JB4). Figure 2 (below) shows the location of this

jumper on the PC board.

As Figure 3 (below) shows, jumper JB4 has two possible
positions: strap covering posts 1 & 2, or strap covering posts 2 & 3.
The orientation of the jumper with respect to pin positions is shown in

Figure 4
(above).

SGND & FRGND (JB4)

In the connected position, this jumper links UD-26 pin 7 (Signal
Ground) and frame ground. In the open position, pin 1 is “lifted” from
frame ground.

JB4

Position 1&2 = SGND (UD-26 pin 7)

and FRGND Connected

5

Figure 2. Rear card jumper location

JB4

(peg 1 toward

bottom of card,

peg 3 toward top

of card)

Figure 3. Possible function card strap positions

Position 2&3 = SGND (UD-26 pin 7)

and FRGND Not Connected

6

Figure 4. Model 1000R16P Rack Chassis with Power Supply

WARNING! There are no user-serviceable parts in the

power supply section of the Model 2020RC. Voltage
setting changes and fuse replacement should only be
performed by qualified service personnel. Contact Patton
Electronics Technical support at [phone] for more
information.

4.0 INSTALLATION

This section describes the functions of the Model 1000R16P rack
chassis, tells how to install front and rear Model 2020RC cards into the
chassis and provides diagrams for wiring up the interface connections
correctly.

4.1 THE MODEL 1000R16P RACK CHASSIS

The 1000R16P Rack Chassis (shown in Figure 4, below) has
sixteen short range modem card slots, plus its own power supply.
Measuring only 3.5" high, the 100016RP is designed to occupy only 2U
in a 19" rack. Sturdy front handles allow the 1000R16P to be extracted
and transported conveniently.

4.1.1 THE RACK POWER SUPPLY

The power supply included in the Model 1000R16P 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 spring loaded thumb screws and the
rear card by conventional metal screws.

(continued)

7

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
1000R16P 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.

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.

4.2 INSTALLING THE MODEL 2020RC INTO THE CHASSIS

The Model 2020RC is comprised of a front Function card and a
rear Interface card. The two cards connect in the rack chassis via
mating 50 pin card edge connectors. Use the following steps as a
guideline for installing each Model 2020RC into the Model 1000R16P

rack chassis:

1. Slide the rear Interface card into the back of the chassis along the

metal rails.

2. Secure the rear card using the metal screws provided.

3. Slide the Function card into the front of the chassis. It should

meet the rear card when it's almost all the way into the

8

Figure 5. Model 2020RC rear interface card, showing connectors

A1 B1

Notice! Any terminal cable connected to the Model

2020RC must be shielded cable, and the outer shield must
be 360 degree bonded–at both ends–to a metal or
metalized backshell.

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 spring loaded thumb screws.

NOTE: Since the Model 1000R16P chassis allows "hot swapping"
of cards, it is not necessary to power down the rack when you i
install or remove a Model 2020RC.

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Figure 6. The Model 2020RC front panel, showing LED positions

Model 2020RC

Power

TD

RD

RTS

CTS

CD

DTR

4.3 DCE/DTE CONNECTION

The Model 2020RC rear card has two UD-26 connectors, labeled

“A1” and “B1” (see figure 5, below). Port A1 connects to the RS-232
device. Port B1 connects to the V.35 device. As discussed in Section

3.1, the ports may be configured as DCE-to-DTE or DTE-to-DCE.

To connect computing devices to ports A1 and B1 on the Model

2020RC, follow these instructions:

1. Configure the Model 2020RC for your specific application

according to the instructions in Section 3.0 of this manual.

2. Connect computing devices to the Model 2020RC using multipair

adapter cables (see Appendix B for a list of custom adapter
cables available from Patton Electronics). Either the RS-232 or the
V.35 device may supply the clock. The wiring of your adapter
cables should support your system’s timing requirements.

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5.0 OPERATION

Once you have configured each Model 2020RC and connected the
cables, you are ready to operate the units. This section describes the
LED status monitors, clocking requirements and the power-up
procedure.

5.1 LED STATUS MONITORS

The Model 2020RC features thirteen front panel LEDs that indicate
the condition of the modem and communication link. Figure 6 (below)
shows the positions of the LEDs, and the bullets describe their
functions.

• Power - will glow green when power is applied to the Model
2020RC front card.

• TD (Transmit Data) - indicates status of transmit data from the
DTE. Red indicates a mark or idle state. Green indicates a space
or active state.

• RD (Receive Data) - indicates status of receive data from the
DCE. Red indicates a mark or idle state. Green indicates a space
or active state.

• RTS (Request to Send) - indicates status of Request to Send
from the DTE. Red indicates a mark or idle state. Green indicates
a space or active state.

• CTS (Clear to Send) - indicates status of Clear to Send from the
DCE. Red indicates a mark or idle state. Green indicates a space
or active state.

(continued)

• CD (Carrier Detect) - indicates status of Carrier Detect from the

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DCE. Red indicates a mark or idle state. Green indicates a space
or active state.

• DTR (Data Terminal Ready) - indicates status of Data Terminal
Ready from the DTE. Red indicates a mark or idle state. Green
indicates a space or active state.

5.2 CLOCKING

The Model 2020RC supports all clocking methods, whether clock is
supplied by the DCE or DTE, and whether it is supplied by the V.35 or
RS-232 device. No special configuration of the Model 2020RC is
required (or possible) with respect to clocking.

5.2 POWER-UP

There is no power switch on the Model 2020RC: Power is
automatically applied to the 2020RC when its card-edge connector
touches the chassis' mid-plane socket, or when the chassis' power is
turned on.

Note: The 2020RC is a "hot swappable" card—it will not be

damaged by plugging it in or removing it while the rack is powered up.

12

APPENDIX A

MODEL 2020RC SPECIFICATIONS

Function: Bidirectional RS-232 to V.35 conversion

Transmission Format: Synchronous, transparent to protocol, full or

half duplex; passes all appropriate

control signals

External Interface: Dual UD-26 female high density connectors

Data Rates: Up to 384 kbps

Configuration: DTE/DCE, strap switchable

Clocking: Supplied by the connected devices

13

13- Not Used
12- Not Used
11- Not Used
10- Not Used
9- Not Used
8- (CD) Carrier Detect
7- (SG) Signal Ground
6- (DSR) Data Set Ready
5- (CTS) Clear to Send
4- (RTS) Request to Send
3- (RD) Receive Data
2- (TD) Transmit Data
1- (FG) Frame Ground

MODEL 2020RC RS-232 INTERFACE

Not Used -26
Not Used -25

External Clock (XC) -24

Not Used -23
Not Used -22
Not Used -21

Data Term Ready (DTR) -20

Not Used -19
Not Used -18

Receive Clock (RC) -17

Not Used -16

Transmit Clock (TC) -15

Not Used -14

13- Not Used
12- (TC-b) Trans Clock (b)
11- (XC-b) Ext Clock (b)
10- Not Used
9- (RC-b) Receive Clock (b)
8- (CD) Carrier Detect
7- (SG) Signal Ground
6- (DSR) Data Set Ready
5- (CTS) Clear to Send
4- (RTS) Request to Send
3- (RD-a) Receive Data (a)
2- (TD-a) Transmit Data (a)
1- (FG) Frame Ground

MODEL 2020RC V.35 INTERFACE

Not Used -26
Not Used -25

External Clock (a) (XC-a) -24

Not Used -23
Not Used -22
Not Used -21

Data Term Ready (DTR) -20

Not Used -19
Not Used -18

Receive Clock (a) (RC-a) -17

Receive Data (b) (RD-b) -16

Trans Clock (a) (TC-a) -15

Transmit Data (b) (TD-b) -14

Electrical Interface: RS-232: RS-232/V.24 compatible; V.35 data

and clock receivers: V.35
compliant; V.35 data and
clock drivers: 0.55V differential signal;

V.35 control signals: RS-232/V.24 compatible

14

APPENDIX D

PATTON MODEL 2020RC BLOCK DIAGRAM

Copyright ©

Patton Electronics Company

All Rights Reserved

An ISO-9001

Certified Company

Dear Valued Customer,

Thank you for purchasing Patton Electronics products! We do

appreciate your business. I trust that you find this user manual helpful.

We manufacture one of the widest selections of data communications
products in the world including CSU/DSU's, network termination units,
powered and self-powered short range modems, fiber optic modems, interface
converters, baluns, electronic data switches, data-line surge protectors,
multiplexers, transceivers, hubs, print servers and much more. We produce
these products at our Gaithersburg, MD, USA, facility, and can custom
manufacture products for your unique needs.

We would like to hear from you. Please contact us in any of the
following ways to tell us how you like this product and how we can meet your
product needs today and in the future.

Web: http://www.patton.com

Sales E-mail: [email protected]

Support E-mail: [email protected]

Phone - Sales [phone]

Phone - Support [phone]

Fax: [phone]

Mail: Patton Electronics Company

7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA

We are committed to a quality product at a quality price. Patton
Electronics is ISO 9001 certified. We meet and exceed the highest standards
in the industry (CE, UL, etc.).

It is our business to serve you. If you are not satisfied with any
aspect of this product or the service provided from Patton Electronics or its
distributors, please let us know.

Thank you.

Burton A.Patton
Vice President

P.S. Please tell us where you purchased this product:

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