Black Box MX511A, LOCAL TDM-8 Specifications

1

Connects up to eight
asynchronous devices.

Uses existing RJ-11
wiring.

Installs easily with
RJ-11 adapters.

Transformer isolation
protects your data.

Sends data up to 6000
feet using 24 AWG
wire.

Internal line­equalization jumpers
can be set to get the
best performance out
of the communication
line.

T

he Local TDM-8 multiplexes
data up to 6000 feet to or from

eight local async devices.

This mux features built-in
surge protection, Alternate Mark
Inversion (AMI) encoding to flag
potential line problems, and line­equalization jumpers to make sure
that your multiplexors are
synchronized.

Establish eight independent links.

Each link can run at speeds up
to 9600 bps. The composite
channel sends data at 671 kbps.

Why pay for expensive cabling?

Low-cost 4-wire, 2-twisted­pair cabling is all you need to
provide the link between two
Local TDM-8s.

No more equipment to buy.

The Local TDM-8 has built-in
high-performance line-driver
circuitry. There’s no need for you
to spend money on additional line

LOCAL TDM-8

PWR SYNC

LOSS

A multiplexor and line driver

in one low-cost unit.

Key Features

LOCAL TDM-8

drivers or modems, or to access
your local telephone company, to
complete your system.

Installation is quick and easy.

The Local TDM-8 is small
enough to put almost anywhere.
The RJ-11 connectors make
installation convenient and
uncomplicated.

Fine-tune the Local TDM-8 for
optimum transmission-line
performance.

Line-equalization jumpers can
be set for different composite line
lengths to compensate for various
impedances.

Isolation transformers provide
built-in surge protection.

Any differences in ground
potential from building to building
are eliminated. Common-mode
noise differences are also
rejected.

Minimizes EMI/RFI.

The metal enclosure prevents
electromagnetic interference and
radio-frequency interference
(EMI/RFI) emissions from
interfering with other devices
located nearby.

RJ-11 adapters simplify
connections.

The adapters will take a DTE
or DCE device having a male or
female DB25 connector and
convert the connection to an RJ­11 connector. Now all you need is
four-wire cable with RJ-11
connectors can now be easily
installed between your devices
and the Local TDM-8.

Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: [e-mail]

© 2005. All rights reserved.

Black Box Corporation.

11/2/2005 #10896

2

• (1) Local TDM-8

• (1) User’s manual

• (1) Power supply

Multiplexor Type — Time-division

Composite Interface — Alternate

Mark Inversion (AMI),
transformer coupled

Speed —

Composite: 671 kbps;
Channel: 0 to 9600 bps, each port

transparent to data

Channel Capacity — 8

Data Format — Asynchronous

Maximum Transmission Distance

— 6000 feet (1.83 km) over

24 AWG cable

Diagnostics — Bidirectional

Loopback

Enclosure — Metal

Connectors — Sub-channels:

(8) RJ-11 female;

Composite: (1) RJ-11 female

Indicators — (2) LEDs: SYNC LOSS

(data synchronization lost) and
PWR (power)

Power Supply — 115 VAC, 60 Hz,

wallmount

Power Consumption — 3.3 watts

Size — 1.5"H x 6.5"W x 8.5"D

(3.8 x 16.5 x 21.6 cm)

Weight — Unit only: 2.46 lb.

(1.12 kg);

Unit with power supply: 3.26 lb.

(1.48 kg)

What’s Included

Specifications

Ordering Information

ITEM CODE

Local TDM-8................................................................MX511A

RJ-11 Adapter Kit (male) ...............................................FA252

RJ-11 Adapter Kit (female) ...........................................FA253

NOTE: The Local TDM-8 must be used in pairs.

Printer

Async Computer

Minicomputer

Plotter

(Up to 8 Async

Devices)

Modular RJ-11

Cable

4-Wire Twisted-Pair

Cable

IBM PC
(Up to 8 async

devices)

Bar Code Reader

Async Terminal

IBM®PC

Adapters

Adapters

Wallplates

2 Twisted Pairs (Up

to 6000 feet)

Async Terminals

Serial Printers

RJ-11 Cables

Local TDM-8

Local TDM-8

Local TDM-8 Local TDM-8

Async Host

Install an RJ-11 adapter on each async channel device and use modular RJ-11 cables to connect the devices to
the local TDM-8. Equipment can easily be removed or added.

Up to eight devices can access a host computer.

Multiplex up to eight devices on each Local TDM-8.