Black Box ME930C-RJ11 User manual

CUSTOMER
SUPPORT
INFORMATION
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FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
FEBRUARY 1999
ME930C-RJ11
Sync MP Line Driver Card
Power
TD
RD
Cntrl
In
Cntrl
Out
Test

1
FCC/IC STATEMENTS AND DECLARATION OF CONFORMITY
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate 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 communication. It 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 against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct the
interference.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital
apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
DECLARATION OF CONFORMITY
This equipment complies with the Electromagnetic Compatibility (EMC) directive
and the Low Volatge Directive (LVD) of the Euopean Union.

2
SYNC MP LINE DRIVER CARD
DISCLAIMER
Under no condition shall the manufacturer 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.
TRADEMARKS
Any trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.

3
TABLE OF CONTENTS
Contents
Chapter Page
1. Specifications ............................................................................................. 4
2. Introduction ............................................................................................... 6
2.1 Features ............................................................................................... 6
2.2 Overview .............................................................................................. 6
3. Configuration ............................................................................................. 7
3.1 The Orientation and Default Settings of the DIP Switch ................. 8
3.2 Detailed Switch Settings ..................................................................... 9
3.3 Configuring the Rear Half-Card ...................................................... 10
4. Installation ................................................................................................ 13
4.1 The MicroRACK Chassis ................................................................... 13
4.2 The MicroRACK’s Power Supply ..................................................... 14
4.3 Installing the Sync MP Line Driver Card ......................................... 14
4.4 Connecting Cables to the Card ........................................................ 15
4.4.1 Making the RS-232 Connection ............................................. 15
4.4.2 Making the Twisted-Pair Connection .................................... 16
4.4.2.A Point-to-Point Twisted-Pair Connections ................. 16
4.4.2.B Multipoint Twisted-pair Connections ...................... 17
5. Operation ................................................................................................. 18
5.1 LED Status Monitors ......................................................................... 18
5.2 Power-Up ........................................................................................... 19
5.3 Test Modes ........................................................................................ 19
5.3.1 Local Analog Loopback .......................................................... 19
5.3.2 Remote Analog Loopback ...................................................... 20
6. Troubleshooting ...................................................................................... 21
6.1 Calling Black Box .............................................................................. 21
6.2 Shipping and Packaging ................................................................... 21
Appendix A: Cable Recommendations ......................................................... 22
Appendix B: Block Diagram .......................................................................... 23

4
SYNC MP LINE DRIVER CARD
1. Specifications
Compliance — FCC Part 15 Subpart J Class A, IC Class/classe A
Interfaces — Local: EIA/TIA RS-232C/ITU-T V.24, V.28;
Line: Proprietary balanced 4-wire (see Line Type below)
Protocol — Synchronous
Clock Source — Internal or external (from DTE), user-selectable; with
special cabling, can also use recovered receive clock
Data Rate — 19.2, 14.4, 9.6, 7.2, 4.8, 2.4, or 1.2 kbps (user-selectable)
Flow Control — RTS/CTS (hardware—RTS/CTS delay can be 0, 8, or
53 ms, user-selectable); can also pass through
X-ON/X-OFF (software)
Carrier Control — Constantly on or controlled by RTS (user-selectable)
Operation — Point-to-point or multipoint
Line Type — 4-wire unconditioned twisted pair, 19 to 26 AWG, with
20 pF/ft. (65.6 pF/m) or better capacitance
Optical Isolation — 150 Vrms minimum
User Controls — Front-panel test pushbutton;
8-position DIP switch for various options mounted on
front half-card;
(3) Jumpers for grounding options mounted on rear
half-card
Diagnostics — Simultaneous local and remote analog loopback,
controlled with front-panel pushbutton
Indicators — (10) Front-mounted LEDs:
(1) Power;
(1) Test;
(2) TD:
(1) for positive-state activity (green),
(1) for negative-state activity (red);

5
CHAPTER 1: Specifications
Indicators
(continued) — (10) Front-mounted LEDs (continued):
(2) RD:
(1) for positive-state activity (green),
(1) for negative-state activity (red);
(2) Cntrl In:
(1) for RTS from local device ON (green);
(1) for RTS from local device OFF (red);
(2) Cntrl Out:
(1) for carrier and Carrier Detect ON (green);
(1) for carrier and Carrier Detect OFF (red)
Connectors — (1) DB25 female for RS-232;
(1) Six-wire RJ-11 (RJ-12) for line;
(1) 50-pin card-edge on each half-card for mating
interconnection and chassis attachment
Surge Protection — Silicon Avalanche Diodes capable of dissipating
600 watts rms within 1 millisecond (initial reponse
time less than 1 picosecond)
Power — Input: 10-VAC from MicroRACK chassis (which has
a switchable 120-VAC or 240-VAC power supply);
Consumption: 700 mW typical
Temperature
Tolerance — 32 to 122˚F (0 to 50˚C)
Humidity
Tolerance — 0 to 95% noncondensing
Size — Not incl. protruding connectors, screws, and controls:
Front half-card:
3.1"H x 1"W x 4.8"D (7.8 x 2.5 x 12.2 cm);
Rear half-card:
3.3"H x 1"W x 2.6"D (8.4 x 2.5 x 6.7 cm);
Front and rear half-cards mated:
3.3"H x 1"W x 7.2"D (8.4 x 2.5 x 18.3 cm)
Weight — Net total, both half-cards: 4 oz. (114 g, 0.3 lb., 0.1 kg)

6
SYNC MP LINE DRIVER CARD
2. Introduction
2.1 Features
• Supports data rates from 1200 to 19,200 bps, user-selectable
• Optical isolation
• High-speed surge protection
• Supports distances up to 10 miles (16 km)
• Designed to be mounted in our MicroRACK system
• Full set of LED indicators
• Point-to-point or multipoint
• Loopback test modes
• Internal or external clocking
• Can perform hardware (RTS/CTS) flow control or pass through software
(X-ON/X-OFF) flow control
• Carrier can be constantly ON or controlled by RTS
2.2 Overview
The Sync MP Line Driver Card (our product code ME930C-RJ11) operates in full
duplex over four-wire cable (two unconditioned twisted pairs). The Card supports
data rates up to 19.2 Kbps and has a maximum range of 10 miles (at 1200 bps over
19-AWG wire). The Card also passes one control signal in each direction and
features both optical isolation and Silicon Avalanche Diode surge protection on
the data-line side. It can use its internal clock or the external clock from the
attached DTE.
The Sync MP Line Driver Card is designed to be mounted in our MicroRACK
system (product codes RM202 through RM216), a chassis that takes up 2U (3.5",
8.9 cm) of vertical space in a 19" rack. This chassis has a switchable 115/230-volt
power supply and hosts cards with a midplane architecture: One “function” half-
card slides into the front of the chassis and mates in the middle with a “connector”
half-card that slides into the rear of the chassis.
The Sync MP Line Driver Card has two built-in diagnostic tools: local and remote
loopback tests. Additionally, LEDs on the Card’s front panel allow you to visually
monitor communication.

7
CHAPTER 3: Configuration
3. Configuration
This chapter describes the location and orientation of the Sync MP Line Driver
Card’s configuration switch, provides detailed instructions for setting each switch
position, and describes jumper settings for the rear half-card.
As shown in Figure 3-1 below, the Card’s “function” front half has an eight-
position DIP switch labeled “SW1” that you can use to configure the Card for any
of a wide range of synchronous applications. This DIP switch is accessible when the
Card is slid out of the rack chassis. Once configured, the Card is designed to
operate transparently, without need for frequent reconfiguration: Just set it and
forget it!
Figure 3-1. The front half-card of the Sync MP Line Driver Card.
SW1
(position 1 on left)

8
SYNC MP LINE DRIVER CARD
3.1 The Orientation and Default Settings of the DIP Switch
The eight-position DIP switch on the Sync MP Line Driver Card allows you to
specify the Card’s data rate, clocking method, RTS/CTS delay, and carrier-control
method. Figure 3-2 below shows the orientation of the DIP switch with respect to
the “ON” and “OFF” settings of its switch positions. Table 3-1 below summarizes
the factory-default settings of these switch positions.
Figure 3-2. DIP switch SW1.
Table 3-1. SW1’s factory-default settings.
Position Function Factory-Default
Setting
1 Data Rate OFF
2 " OFF (9600 bps)
3"ON
4(Reserved for (N/A)
future use)
5 Transmit Clock ON (Internal)
6 RTS/CTS Delay ON (8 ms)
7 " OFF
8 Carrier Control OFF (Constant)
12345678
ON ON
OFF

9
CHAPTER 3: Configuration
3.2 Detailed Switch Settings
This section provides detailed information about the function of each DIP-switch
position and lists all of their possible settings. Use this section as a configuration
guide for applications where the Sync MP Line Driver Card’s default settings would
not provide correct results.
1. Data Rate (Positions 1 through 3)
Switch positions 1 through 3 are set in combination to allow the Card to be used at
data rates from 1200 bps up to 19,200 bps.
Pos. 1 Pos. 2 Pos. 3 Data Rate in bps
ON ON ON 1200
OFF ON ON 2400
ON OFF ON 4800
ON ON OFF 7200
OFF OFF ON 9600 (default)
OFF ON OFF 14,400
ON OFF OFF 19,200 settings are identical
OFF OFF OFF 19,200
2. Position 4 is reserved for future use. Do not change its setting.
3. Transmit Clock (Position 5)
Switch position 5 is used to specify the Card’s clocking method. The Card will
provide an internal clock on DB25 Pin 15 if position 5 is set to OFF (the default),
or receive an external clock from the attached DTE on DB25 Pin 24 if position 5
is set to ON.
Although the Card can’t be directly set to use recovered receive clock from the
remote Card, it always outputs that signal on DB25 Pin 17. So you can “trick” the
local Card into using receive clock by setting it for external clock (position 5 ON)
and attaching a special cable to its DB25 connector. This cable must not only pass
Pin 17 on the Card to Pin 17 on the DTE (which must be set for receive clock) but
must also loop Pin 17 on the Card back to Pin 24 (the external clock lead) on the
Card. If you want such a cable, please call Black Box for technical support.