Black Box ME734A-MSP, ME729A-MSP, ME735A-F, ME734A-F, ME735A-M Instruction Manual

APRIL 2000
ME729A-FSP ME734A-MSP
ME729A-MSP ME735A-F
ME734A-F ME735A-M
ME734A-M ME735A-FSP
ME734A-FSP ME735A-MSP

Sync SHM-NPR MP

CUSTOMER SUPPORT INFORMATION

Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [e-mail]

1

FCC INFORMATION

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 classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.

2

SYNC SHM-NPR MP

NORMAS OFICIALES MEXICANAS (NOM)

ELECTRICAL SAFETY STATEMENT

INSTRUCCIONES DE SEGURIDAD

1. Todas las instrucciones de seguridad y operación deberán ser leídas antes
de que el aparato eléctrico sea operado.

2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.

3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.

4. Todas las instrucciones de operación y uso deben ser seguidas.

5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo,
cerca de la tina de baño, lavabo, sótano mojado o cerca de una alberca,
etc..

6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales
que sean recomendados por el fabricante.

7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.

8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más
allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.

9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama,
sofá, alfombra o superficie similar puede bloquea la ventilación, no se
debe colocar en libreros o gabinetes que impidan el flujo de aire por los
orificios de ventilación.

3

NOM STATEMENT

10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.

11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del
tipo descrito en el instructivo de operación, o como se indique en el
aparato.

12. Precaución debe ser tomada de tal manera que la tierra fisica y la
polarización del equipo no sea eliminada.

13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen
del aparato.

14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.

15. En caso de existir, una antena externa deberá ser localizada lejos de las
lineas de energia.

16. El cable de corriente deberá ser desconectado del cuando el equipo no
sea usado por un largo periodo de tiempo.

17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.

18. Servicio por personal calificado deberá ser provisto cuando:

A: El cable de poder o el contacto ha sido dañado; u

B: Objectos han caído o líquido ha sido derramado dentro del

aparato; o

C: El aparato ha sido expuesto a la lluvia; o

D: El aparato parece no operar normalmente o muestra un cambio en

su desempeño; o

E: El aparato ha sido tirado o su cubierta ha sido dañada.

4

SYNC SHM-NPR MP

TRADEMARKS USED IN THIS MANUAL

Any trademarks mentioned in this manual are
acknowledged to be the property of the trademark
owners.

5

CONTENTS

Contents

1. Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3. Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1 Switch Locations. . . . . . . . . . . . . . . . . . . . . . . 11

3.2 Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . 12

4. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.1 Connection to the Twisted-Pair

Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.1.1 Twisted-Pair Connection Using

RJ-11 or RJ-45 . . . . . . . . . . . . . . . . . . . . . 16

4.1.2 Twisted-Pair Connection Using

Terminal Blocks . . . . . . . . . . . . . . . . . . . 18

4.2 Connection to the RS-232 Interface . . . . . . . 26

4.2.1 Connection to a DTE Device . . . . . . . . . 26

4.2.2 Connection to a DCE Device . . . . . . . . . 26

4.3 Operating the Sync SHM-NPR MP . . . . . . . . 28

Appendix: RS-232 Pin Configurations . . . . . . . . . . 29

6

SYNC SHM-NPR MP

1. Specifications

Protocol — Synchronous

Speed — 1200 to 19,200 bps

Distance — Wire Gauge

Speed (bps) 19 24 26

19,200 7.5 mi (12.1 km) 3.5 mi (5.6 km) 2.5 mi (4.0 km)

9600 10.0 mi (16.1 km) 3.5 mi (5.6 km) 2.5 mi (4.0 km)
4800 10.0 mi (16.1 km) 7.0 mi (11.2 km) 4.0 mi (6.4 km)
2400 10.0 mi (16.1 km) 8.5 mi (13.7 km) 5.0 mi (8.0 km)
1200 11.0 mi (17.7 km) 8.5 mi (13.7 km) 6.0 mi (9.7 km)

Surge Protection — 600W power dissipation at 1 ms

and response time less than 1 picosecond

Control Signals — RTS/CTS delay of 7 or 53 ms;

Carrier continuous or controlled by RTS; DCD
turns “On” after recognizing the receive signal

Clocking — Internal, external, or loopback derived

from the receive signal

Operation — 4-wire unconditioned twisted-pair, full-

or half-duplex

Connectors — (1) DB25 male or female and either

(1) 5-screw terminal lock, (1) RJ-11, or (1) RJ-45

7

CHAPTER 1: Specifications

Transmit Level — -6 dBm

Range — Up to 11 miles (17.7 km)

Temperature — 32° to 140° F (0° to 60° C)

Humidity — 95% noncondensing

Power — No power required; uses ultra-low power

(6 volts required) from EIA data and control
signals—Pins 2, 4, 9, and 20 in DCE mode (the
Sync SHM-NPR MP does not operate in DTE
mode)

Size — 2.7"H x 2.1"W x 0.7"D (6.9 x 5.3 x 1.8 cm)

Weight—0.1 lb. (0.05 kg)

NOTE

The Sync SHM-NPR MP must be used in pairs. The Sync
SHM-NPR MP is compatible with the Mini Driver 4W-S
Series (ME750A-ME754A, ME756A).

8

SYNC SHM-NPR MP

2. Description

The Sync SHM-NPR MP features surface-mount
technology and a custom VLSI chip. It supports up to
12 drops and is powered by data only. It operates at
speeds from 1.2 to 19.2 kbps. The unit has the best
speed-to-distance ratio of any available data-powered
sync SHM—11 miles (17.7 km) at low data rates and
four miles (6.4 km) at 19.2 kbps over two 22-AWG
twisted-pair wires (conservatively rated).

The SHM-NPR operates at full- or half-duplex and uses
three clocking methods: internal, external, and
received loopback. It’s also transformer-isolated for
ground-loop protection. You can select RTS/CTS delay
of 7 or 53 ms, and carrier status of constantly on or RTS­controlled.

Ten models are available:

• Sync SHM-NPR MP (DB25) with Surge Protection
(4-Screw Terminal Block) (ME729A-MSP)

• Sync SHM-NPR MP (DB25) with Surge Protection
(4-Screw Terminal Block) (ME729A-FSP)

9

CHAPTER 2: Introduction

• Sync SHM-NPR MP/RJ-11 (ME734A-M)

• Sync SHM-NPR MP/RJ-11 (ME734A-F)

• Sync SHM-NPR MP/RJ-11 (ME734A-MSP)

• Sync SHM-NPR MP/RJ-11 (ME734A-FSP)

• Sync SHM-NPR MP/RJ-45 (ME735A-M)

• Sync SHM-NPR MP/RJ-45 (ME735A-F)

• Sync SHM-NPR MP/RJ-45 with Surge Protection
(ME735A-MSP)

• Sync SHM-NPR MP/RJ-45 with Surge Protection
(ME735A-FSP)

Features

• New design uses a custom VLSI chip and
surface-mount technology.

• Internal, external, or receive loopback clocks

(switch-selected).

• Speeds up to 19.2 kbps.

10

SYNC SHM-NPR MP

• Range of up to 11 miles (17.7 km).

• Carrier “on” or “controlled” (switch-selected).

• Options for easy daisychain installation.

• Full- or half-duplex operation.

• Transformer (DC) isolated.

• Ideal for multipoint configurations.

• Built-in high-speed surge protection with power­handling capacity of 600W per wire at 1 ms.

• Compatible with the Mini Driver 4W-S Series
(ME750A through ME754A, and ME756A).

11

CHAPTER 3: Configuration

3. Configuration

The Sync SHM-NPR MP has seven configuration
switches, which allow selection of carrier control
method, clocking method, RTS/CTS delay, and data
rate. This section describes switch locations and
explains all possible switch configurations.

3.1 Switch Locations

For your convenience, all configuration switches are
located on a SIP (single in-line package) mounted on
the PC board. Figure 3-1 shows the location of the SIP
on the board. For instructions on opening the SHM­NPR case, see Section 4.1.2.

Figure 3-1. Switch Locations.

Control

Switches

Patton

VLSI chip

Surge

Suppressors

(1030S only)

Isolating

Transformers

Terminal

Block

12

SYNC SHM-NPR MP

Figure 3-2 shows the orientation of the switches on the
SIP, including ON/OFF position.

Figure 3-2. Close-up of Configuration Switches.

3.2 Switch Settings

All possible settings for the Sync SHM-NPR’s
configuration switches are presented in Table 3-1. If you
have additional questions about configuration, contact
technical support.

Table 3-1. Switch summary table

Position Function Factory default

Switch 1 Not used Off Not used
Switch 2 Carrier enable On Constant Carrier
Switch 3 Transmit clock Off Internal
Switch 4 Transmit clock On clock
Switch 5 RTS/CTS delay On 7-ms delay
Switch 6 Data rate On
Switch 7 Data rate Off 9,600 bps
Switch 8 Data rate Off

}

}

OFF

1 2 3 4 5 6 7 8

ON

S

WITCH

1: N

OTUSED

S

WITCH

2: C

ARRIERENABLE

Use switch 2 to specify how the carrier signal is raised.
In most point-to-point, full-duplex applications, the
carrier signal can remain constantly “high.” In a
multipoint environment, contention for the line is
controlled by RTS.

Switch 2

Setting
On Constant carrier (Default)
Off Controlled by RTS

S

WITCHES

3

AND

4: T

RANSMITCLOCK

Use switches 3 and 4 together to specify the clocking
method. The SHM-NPR can provide an internal clock
(pin 15), receive an external clock (from pin 24), or
loop back a receive clock.

Switch 3

Switch 4 Setting
On On External clock
On Off External clock
Off On Internal clock (Default)

Off Off Receive loopback

13

CHAPTER 3: Configuration

14

SYNC SHM-NPR MP

S

WITCH

5: RTS/CTS D

ELAY

After the host terminal raises a request to send (RTS),
the SHM-NPR raises CTS after a slight delay in order to
give the remote terminal time to receive an incoming
signal. Depending on the type of environment, either a
7- or 53-ms delay can be selected.

Switch 5

Setting
On 7 ms (Default)
Off 53 ms

S

WITCHES

6, 7,

AND

8: D

ATARATE

Switches 6 through 8 are set in combination to allow the
SHM-NPR to support data rates from 1.2 to 19.2 kbps.

Switch 6

Switch 7 Switch 8 Setting
On On On 1.2 kbps
On On Off 2.4 kbps
On Off On 4.8 kbps
Off On On 7.2 kbps
On Off Off 9.6 kbps
Off On Off 14.4 kbps
Off Off On 19.2 kbps
Off Off Off 19.2 kbps

15

CHAPTER 4: Installation

4. Installation

Once the Sync SHM-NPR is properly configured, it is
ready to connect to your system. This section tells you
how to properly connect the Sync SHM-NPR MP to the
twisted-pair and RS-232 interfaces, and how to operate
the unit.

4.1 Connection to the Twisted-Pair Interface

The Sync SHM-NPR supports data-only communication
between two RS-232 devices at distances to 11 miles
(17.7 km) and data rates to 19.2 kbps. There are two
essential requirements for installing the Sync SHM-NPR:

1. These units work in pairs. Therefore, you must
have one Sync SHM-NPR at each end of a
two-twisted-pair interface.

2. To function properly, the Sync SHM-NPR needs
two twisted pairs of metallic wire. These pairs
must be unconditioned, dry metallic wire, between
19 and 26 AWG (the higher number gauges may
limit distance somewhat). Standard dial-up
telephone circuits, or leased circuits that run
through signal equalization equipment, are not
acceptable.

16

SYNC SHM-NPR MP

For your convenience, the Sync SHM-NPR is available
with three different twisted-pair interfaces: RJ-11 jack,
RJ-45 jack, and terminal blocks with strain relief.

4.1.1 T

WISTED-PAIR

C

ONNECTIONUSING

RJ-11

OR

RJ-45

The RJ-11 and RJ-45 jacks on the SHM-NPR’s twisted­pair interface are pre-wired for a standard telco wiring
environment. The signal/pin relationships are shown in

Figure 4-1.

RJ-11

Signal RJ-45 Signal

1 . . . . . . . GND

1

1 . . . . . . . . . N/C

2 . . . . . . . RCV

2

2 . . . . . . . . . GND

1

3 . . . . . . . XMT 3 . . . . . . . . . RCV

2

4 . . . . . . . XMT 4 . . . . . . . . . XMT

5 . . . . . . . RCV 5 . . . . . . . . . XMT

6 . . . . . . . GND1 6 . . . . . . . . . RCV

. . . . . . . . 7 . . . . . . . . . GND1

. . . . . . . . 8 . . . . . . . . . N/C

1

Connection to ground is optional.

2

The Sync SHM-NPR is not polarity sensitive.

Figure 4-1. RJ-11 and RJ-45 Signal/Pin Relationships.

17

CHAPTER 4: Installation

When you connect two SHM-NPRs, you must use a
crossover cable. Figure 4-2 shows how you should
construct a crossover cable for an environment where
both SHM-NPRs use a 6-wire RJ-11 connector. Use a
similar method when you use an RJ-45 connector or a
combination of both RJ-11 and RJ-45.

SIGNAL

PIN# COLOR2COLORPIN# SIGNAL

GND

1

1 Blue. . . . . White 6 GND

RCV

3

2 Yellow . . . Red 4 XMT
XMT 3 Green . . . Black 5 RCV

XMT 4 Red . . . . . Yellow 2 RCV

RCV 5 Black . . . . Green 3 XMT

GND 6 White. . . . Blue 1 GND

1

Connection to ground is optional.

2

Standard color codes—yours maybe different.

3

The Sync SHM-NPR is not sensitive to polarity.

Figure 4-2. Crossover-Cable Construction.

18

SYNC SHM-NPR MP

4.1.2 T

WISTED-PAIRCONNECTIONUSINGTERMINALBLOCKS

If your application requires you to connect two pairs of
bare wires to the Sync SHM-NPR, you will need to open
the case to access the terminal blocks. The instructions
on the following pages 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. Open the unit by gently inserting a screwdriver
between the DB25 connector and the lip of the
plastic case (see Figure 4-3). You don’t have to
worry about breaking the plastic, but be careful
not the bend the D-sub connector.

19

CHAPTER 4: Installation

Figure 4-3. Opening the Sync SHM-NPR.

Once the unit has been opened, you will be able to see
the terminal blocks located at the rear of the PC board.

20

SYNC SHM-NPR MP

2. Strip the outer insulation from the twisted pairs
about one inch from the end.

Figure 4-4. Stripping the Outer Insulation from the Twisted Pairs.

3. Strip back the insulation on each of the two
twisted-pair wires about 0.25".

Figure 4-5. Stripping the Insulation on Each of the Two Twisted-Pair

Wires.

4. Connect one pair of wires to the two XMT
(transmit) poles on the terminal block. The Sync
SHM-NPR is not polarity sensitive, so either wire
may connect to either pole.

5. Connect the other pair of wires to the two RCV
(receive) poles on the terminal block. The Sync
SHM-NPR is not polarity sensitive, so either wire
may connect to either pole.

21

CHAPTER 4: Installation

Ultimately, you will want to construct a two-pair
crossover cable that makes a connection with the two
Sync SHM-NPRs as shown in Figure 4-6.

XMT - - - - - - - - - - - - - - - - - - - - - - - - RCV One pair
XMT - - - - - - - - - - - - - - - - - - - - - - - - RCV
G - - - - To Shield (Optional) G
RCV- - - - - - - - - - - - - - - - - - - - - - - - - XMT One pair
RCV- - - - - - - - - - - - - - - - - - - - - - - - - XMT

Figure 4-6. Two-Pair Crossover-Cable Configuration.

6. If there is a shield around the telephone cable, it
may be connected to “G” on the terminal block.
To avoid ground loops, we recommend
connecting the shield at the computer end only.
A ground wire is not necessary for proper
operation of the Sync SHM-NPR.

22

SYNC SHM-NPR MP

7. When you finish connecting the wires to the
terminal block, the assembly should resemble

Figure 4-7.

Figure 4-7. Terminal Block with Wires Connected.

+RCV-G-XMT+

23

CHAPTER 4: Installation

8. Place the two halves of the strain-relief assembly on
either side of the telephone wire and press
together very lightly. Slide the assembly so that it
is about two inches (5 cm) from the terminal posts
and press together firmly.

Figure 4-8. Pressing Together the Two Halves of the Strain- Relief

Assembly.

+RCV-G-XMT+

24

SYNC SHM-NPR MP

9. Insert the strain-relief assembly with the wire going
through it into the slot in the bottom half of the
modem case and set it into the recess in the case.

Figure 4-9. Inserting the Strain-Relief Assembly into the Modem Case.

25

CHAPTER 4: Installation

10. Bend the top half of the case as necessary to place
it over the strain-relief assembly. Do not snap the
case together yet.

Figure 4-10. Placing the Top Half of the Case Over the Strain- Relief

Assembly.

11. Insert one captive screw through a saddle washer
and then insert the entire piece through the hole
in the DB25 end of the case. Snap that side of the
case closed. Repeat the process for the other side.
This completes the cable installation.

26

SYNC SHM-NPR MP

4.2 Connection to the RS-232 Interface

Once you have connected the twisted-pair wires
correctly, simply plug the Sync SHM-NPR directly into
the DB25 port of the RS-232 device. After doing so,
remember to insert and tighten the two captive
connector screws.

4.2.1 C

ONNECTION TO A

DTE D

EVICE

The Sync SHM-NPR is wired as a DCE, and therefore
wants to plug into a DTE such as a terminal, PC, or host.
Because the Sync SHM-NPR is interface powered, a
direct connection to the RS-232 DTE port is preferred.
If you must use a cable to connect the Sync SHM-NPR to
the DTE port, make sure it is a straight-through cable of
the shortest possible length—we recommend 6 feet
(1.8 m) or less.

4.2.2 C

ONNECTION TO A

DCE D

EVICE

Since the Sync SHM-NPR is wired as a DCE, you cannot
connect it directly to another DCE such as a modem,
multiplexor, or printer. If you need to connect the Sync
SHM-NPR to another DCE device, you must use a null­modem cable wired according to Figure 4-11. We
recommend that the cable be as short as possible,
preferably 6 feet (1.8 m) or less.

27

CHAPTER 4: Installation

Connection to Connection to
Sync SHM-NPR MP

1

DCE Device

DB25 Pin No. DB25 Pin No.

1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2
3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3
4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
6 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 20
20 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6
17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 24
24 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 17
7 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7

1

When connecting to another DCE device, the Sync
SHM-NPR MP should be configured for “external clock”
(see Section 3.2).

Figure 4-11. Null-Modem Cable Wiring.

28

SYNC SHM-NPR MP

4.3 O

PERATING THESYNC

SHM-NPR MP

Once the Sync SHM-NPR MP is properly configured and
installed, it should operate transparently—as if it were a
standard cable connection. Operating power is derived
from the RS-232 data and control signals; there is no
“ON/OFF” switch. All data signals from the RS-232
interface are passed straight through. All control signals
from the RS-232 interface are looped back.

29

APPENDIX: RS-232 Pin Configurations

Appendix: RS-232 Pin

Configurations

Figure A-1. RS-232 Pin Configurations.

Data Term. Ready (DTR) - 20

1 - (FG) Frame Ground

2 - (TD) Transmit Data

3 - (RD) Receive Data

4 - (RTS) Request to Send

5 - (CTS) Clear to Send

6 - (DSR) Data Set Ready

7 - (SG) Signal Ground

8 - (DCD) Data Carrier Detect

To Mini Driver

From Mini Driver

To Mini Driver

From Mini Driver

From Mini Driver

From Mini Driver

To Mini Driver

Receiver Timing -17

Transmitter Timing - 15

DIRECTION STANDARD “DCE” SETTING DIRECTION

To Mini Driver

To Mini Driver

To Sync SHM-NPR

To Sync SHM-NPR

To Sync SHM-NPR

To Sync SHM-NPR

To Sync SHM-NPR

From Sync SHM-NPR

From Sync SHM-NPR
From Sync SHM-NPR

From Sync SHM-NPR

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]

© Copyright 2000. Black Box Corporation. All rights reserved.