Patton electronics 222NRC User Manual

USER
MANUAL

MODEL 222NRC

Miniature RS-232 to
RS-422 Converter:
Rack Mount Card

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]

Part# 07M222NRC-B
Doc# 052021UB
Revised 4/30/96

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 222NRC 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 222NRC 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 222NRC 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
222NRC 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 that 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:

1) Use only data cables with an external outer shield bonded to a

metal or metalized connector, and...

2) Configure the rear card as shown in Section 3.3.1 in this

manual.

1

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].

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 222NRC. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

2

3.0 CONFIGURATION

This section describes the location and orientation of the Model
222NRC's configuration jumpers, provides detailed instructions on
setting each jumper, and describes the settings for each of the rear
connection cards.

The Model 222NRC uses two jumpers that allow configuration to a
wide range of asynchronous applications. These jumpers are
accessible when the card is slid out of the rack chassis (see Figure 1,
below). Once the hardware is configured, the Model 222NRC is
designed to operate transparently, without need for frequent re­configuration: just set it and forget it!

3.1 JUMPER LOCATIONS AND ORIENTATION

The configuration jumpers on the Model 222NRC board and the
rear interface card allow you to configure the function of both front
panel “Carrier Detect” LEDs, as well as the rear interface card CD
signal. Figure 2 (below) shows the orientation of these jumpers. Notice
that each jumper can either be on pegs 1 and 2, or on pegs 2 and 3.
Note: Pin 1 is always located on the top or left side of the jumper set.

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

• Convenient rack card features two interface converters

• Data rates to 19.2 Kbps over two twisted pair

• RTS and CTS are looped on the RS-232 interface

• Bidirectional conversion between unbalanced RS-232 and
balanced RS-422 interfaces

• Carrier detect LEDs can be customized

• Silicone Avalanche Diode surge protection

• Fits conveniently in Patton’s rack chassis

• Made in USA

2.2 DESCRIPTION

The Model 222NRC Interface Converter Rack Card is a dual

rack card incorporating two converters. The converters let computers,
terminals and modems using the RS-232 interface communicate with
devices using RS-422 balanced electrical signals. Both units operate
full duplex at data rates to 19.2 Kbps over 2 twisted pairs. The Model
222NRC features 13 easy-to-read front panel LEDs, which monitor the
status of data transmission. As an added feature, a set of easily
accessible configuration straps allows the user to control the function of
the carrier detect LEDs.

The Model 222NRC uses the latest surface mount technology to
attain high quality short range modem performance in a convenient
rack card. Filling one function card slot on Patton’s R16P rack chassis,
two Model 222NRCs are available with RJ-11 or RJ-45 rear interface
cards. For workgroup and desktop communications, the Model
222NRC also fits in Patton’s 2, 4 and 8 slot Cluster Boxes. The
combination of rack mount, Cluster Box and interface powered units
provides a completely integrated “networking” solution.

3

Figure 1. Model 222NRC card, showing location of configuration jumpers

Figure 2. Orientation of interface card straps

123 123 123

JP1-A

JP1-B

ON

ON

Normal

Normal

4

1
2
3

1
2
3

3.3.1 REAR CARD STRAP SETTINGS

Figure 5 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.

Figure 6 provides a summary of strap functions for both of the rear

cards. The next page describes each strap's function.

Line A Shield & Line B Shield (JB2 & JB4)

This strap pertains to the line interface. In position 1&2, the strap
links RJ-11 pins 1 and 6 (RJ-45 pins 2 and 7) to frame ground and the
rear panel. These pins can be used as connections for the twisted pair
cable shield. In position 2&3, pins 1 and 6 (or 2 and 7) are
disconnected from frame ground.

(continued)

3.2 SETTING THE CONFIGURATION STRAPS

The Model 222NRC contains two sets of configuration jumpers,
which allow you to set the function of both front panel “Carrier Detect”
LEDs and the CD signal exiting the rear interface card in the rack.
Since the Model 222NRC contains two converters, each unit can be
configured separately.

Both “Carrier Detect” straps can be set to “Normal” or “Always on”.
When operating normally, the “CD” LED will blink to indicate the
presence or absence of the carrier. When set to “Always on”, the “CD”
LED will always indicate that the carrier is “ON”. Figure 3 (below)
summarizes the switch settings. The default position is “Always ON”.

3.3 REAR CARD CONFIGURATION

The 222NRC 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 4
illustrates these two different rear interface options.

Prior to installation, you should examine the rear card you have
selected and ensure that it is configured for your application. Each rear
card is configured by setting straps on the PC board. Sections 3.3.1
and 3.3.2 describe strap locations and settings for each card.

5

Strap Position 1&2 Position 2&3

JB2 Line A Shield No Shield

†

JB4 Line B Shield No Shield

†

JB5 SGND & FRGND* Open (Not Connected)

†

JB6 Unit A DSR

†

N/A

JB7 Unit B DSR

†

N/A

INTERFACE CARD STRAP SUMMARY TABLE #1

Figure 6. Summary of strap settings, †indicates factory default

*via 100 ohm resistor

Figure 5. Strap locations for both rear cards

1
2
3

1
2
3

1
2
3

1
2
3

123

(Unit A)

JB2

JB4

JB6
JB7

JB5

(Unit B)

(Unit A)

(Unit B)

Converter

twisted pair

Terminal

}
}

6

INTERFACE CARD JUMPER SUMMARY TABLE #1

Jumper Function Position 1&2 Position 2&3

JP1-A Carrier Detect - Unit A Always ON* Normal
JP1-B Carrier Detect - Unit B Always ON* Normal

Figure 3. Summary of jumper settings, *indicates factory default

Figure 4. Model 222NRC rear interface card options

RJ-11/6

RJ-45/10

1Q45

1Q11

RJ-11/6

RJ-45/10

RJ-45/10

RJ-45/10

RJ-45/10

RJ-45/10

JB2
Position 1&2 = Line A Shield Connected to Frame Ground
Position 2&3 = No Shield

JB4
Position 1&2 = Line B Shield Connected to Frame Ground
Position 2&3 = No Shield

SGND & FRGND (JB5)

In position 1&2, this strap links signal ground and frame ground
through a 100 Ohm, 1/2 W resistor. In position 2&3, pin 1 is “not
connected to frame ground.

JB5
Position 1&2 = SGND and FRGND Connected
Position 2&3 = SGND and FRGND Not Connected

DTE as DSR or RI (JB6 & JB7)

Because the Model 222NRC uses DSR (but not RI), only position
1&2 is valid when this rear card is used with the Model 222NRC.
Position 1&2 causes the terminal (DTE) to see DSR when the Model
222NRC is powered up properly. Position 2&3 is for Ring Indicate,
which is non-functional on the Model 222NRC. Furthermore, use of
position 2&3 will cause DSR to float, which will lead to improper
operation of the Model 222NRC.

JB6 & JB7
Position 1&2 = DSR
Position 2&3 = (Ring Indicate) Not Validfor Model 222NRC

4.0 INSTALLATION

This section describes the functions of the Model 222NR16P rack
chassis, tells how to install front and rear Model 222NRC cards into the
chassis and provides diagrams for wiring up the interface connections
correctly.

4.1 THE MODEL 222NR16P RACK CHASSIS

The 1000R16P Rack Chassis (shown in Figure 7, 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.

87

Figure 7. Model 1000R16P Rack Chassis with Power Supply

WARNING! There are no user-serviceable parts in the

power supply section of the Model 222NRC. Voltage
setting changes and fuse replacement should only be
performed by qualified service personnel. Contact Patton
Electronics Technical support at [phone] for more
information.

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.

4.2 INSTALLING THE MODEL 222NRC INTO THE CHASSIS

The Model 222NRC is comprised of a front Functions 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 222NRC 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

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
install or remove a Model 222NRC.

4.3 RS-232 CONNECTION

The RS-232 ports are always the

lower

ports on the interface card.
The 10-pin RJ-45s are connected 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)

9

The Model 222NRC 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 a DCE, you will require a null modem
connection. Call Patton Technical Support at [phone] for
specific installation instructions.

4.4 TWISTED PAIR CONNECTION

The Model 222NRC operates full duplex over 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
are satisfactory. Note: The Model 222NRC can only be installed on
private twisted pair cable. Dial-up analog circuits, such as those used
with a standard Hayes-type modem, are

not acceptable.

For further

information about acceptable wire grades, please refer to the table in

Appendix B.

4.4.1 POINT-TO-POINT TWISTED PAIR CONNECTION

The 6-position RJ-11 and 8-position RJ-45 jack options for the

Model 222NRC–always the

upper

jack on the rear interface card–are
prewired for a standard TELCO wiring environment (See Appendix D
for pin number orientations). Connection of a 4-wire twisted pair circuit
between two or more Model 222NRCs requires a

crossover cable

as

shown in the following charts.

RJ-11 Cable

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

†

(continued)

10

Notice! Any terminal cable connected to the Model

222NRC must be shielded cable, and the outer shield must
be 360 degree bonded–at both ends–to a metal or
metalized backshell.

5.0 OPERATION

Once you have configured each Model 222NRC and connected the
cables, you are ready to operate the units. This section describes the
LED status monitors and the power-up procedure.

5.1 LED STATUS MONITORS

The Model 222NRC features thirteen front panel LEDs that indicate
the condition of the modem and communication link. Figure 8 (below)
shows the positions of the LEDs, and the bullets describe their functions.

• The green "PWR" LED glows when power is being applied to the
modem card through its mid-plane chassis connection.

• The green "TD" and "RD" indicators blink to show positive state
data activity. The red "TD" and "RD" indicators blink to show
negative state data activity. A solid red light indicates an idle state.

• If your carrier detect strap is configured as “Always On”, the “CD”
light will always be green. If the carrier detect strap is set to
“Normal”, the green LED lights when the carrier is on; the red LED
lights when the carrier is off.

5.2 POWER-UP

There is no power switch on the Model 222NRC: Power is
automatically applied to the 222NRC when its card-edge connector
touches the chassis' mid-plane socket, or when the chassis' power is
turned on.

Note: The 222NRC is a "hot swappable" card—it will not be

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

RJ-45 Cable

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

†

†

Connection to ground is optional

11

Figure 8. The Model 222NRC front panel, showing LED positions

Model 1000RC

Power

TD

RD

CD

TD

RD

CD

Unit

A

Unit

B

Model 222NRC

12

APPENDIX A

SPECIFICATIONS

Transmission Format: Asynchronous
Data Rate: 0 to 19.2 Kbps
Surge Protection: 600W power dissipation at 1 mS
Control Signal: DCE Mode: CTS (Pin 8) turns ON immediately after

the terminal raises RTS (Pin 9); DSR (Pin 2) turn ON immediately
after the rack has power; CD (Pin 3) may be constantly “ON” or
“normal” (i.e. follows presence or absence of RXC signal).

Transmit Line: 4 wire, unconditioned line (2 twisted pairs)
Transmit Mode: Full duplex, 4-wire
Line Connection: RJ-11 or RJ-45 jacks
Temperature Range: 1-50°C (34-122°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% non-condensing
Dimensions: 0.95”w x 3.1”h x 5.4”l

13

APPENDIX B

CABLE RECOMMENDATIONS

The Patton Model 222NRC operates at frequencies of 20kHz or less
and has been performance tested by Patton technicians using twisted­pair cable with the following characteristics:

W

ire 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.

To gain optimum performance from the 222NRC, 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

14

APPENDIX D

INTERFACE SETTINGS & ORIENTATION

APPENDIX C

FACTORY REPLACEMENT PARTS

The Patton Model 222NRC 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

222NRPEM.........................120/240V Rear Power Entry Module

222NRPSM-1......................120/240V Front Power Supply Module

222NRPEM-DC...................DC Rear Power Entry Module

222NRPSM-48A..................48V Front Power Supply Module

0805US...............................American Power Cord

0805EUR.............................European Power Cord CEE 7

0805EURP..........................Europlug Power Cord CEE 7/16

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

056S1..................................Set of 16 #4 pan head screws/washers

15

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.

For all modular jacks
(6, 8 or 10 position):
Pin 1 is always toward
the bottom when the
rear card is oriented
correctly in the slot

16