BBV TXLD, TXLD(K), TXLD(B) Installation Manual

Building Block Video Ltd.,

Models covered

Line Driver
Installation
Guide

TxLD

17 Apex Park,

Diplocks Industrial Estate,
Hailsham, East Sussex, BN27 3JU, UK.
Tel:[phone]
Fax:[phone]
Support:[phone]
www.bbvcctv.com

BBVBBV

TxLD Keyboard Line Driver Installation Handbook Rev-02 Page 1

UNPACKING

Inspect the packaging for signs of damage. If damage has occurred,
advise the carriers and/or the suppliers immediately. Unpack the
product carefully and check that all the items are present and
correct.

The kit should contain,
1 x female/male D type interface lead,
2 x TXLD units, TXLD(B) & TXLD(K)
2 x 21mm surface mount patresses (one drilled for power connector
entry).

SAFETY PRECAUTIONS

All normal safety precautions laid down by British standards and the
Health and Safety at Work Act should be observed and servicing should
be referred to qualified service personnel.

Technical Specification

Power Requirements 9-12V ac/dc

Max Load <50mA at 12V

Input RS232 3 wire, Tx/Rx/Ground, DB9 patress plate

mounted.

Outputs RS485 twin twisted pair, WAGO
connector.

Facilities Pre-made cable provided to connect to Tx1000

base unit.

TXLD(B) powered from base unit. TXLD(K)

powered from keyboard’s PSU.

Box dimensions Standard single patress box.

Width: 88mm
Length: 88mm
Height: 54mm

Compatible Equipment Tx1000 series base units/keyboards, RS232

serial extension of BBV compatible equipment.

Most 3 wire RS232 links can be extended.

Temperature range -10°C to +40°C

TxLD Keyboard Line Driver Installation Handbook Rev-02 Page 2

TX B
RX B

TX B

INTRODUCTION

The TxLD is a simple to install, cost effective device for remote
installation of a BBV Tx1000 Slave Keyboard when the cable length for
the keyboard serial data exceeds 50 metres. The communications data
for the keyboard is RS232, which will become unreliable at distances
greater than this. The TXLD encorporates 4 differential tranceivers
that convert the RS232 data to RS485 and then back to RS232 at the
opposite end, this enables the data to be transmitted over cable
lengths ten times that of RS232. The TXLD’s are supplied on mounting
plates with single patresses for easy wall mounting.

INSTALLATION

There are two parts to the TXLD, TXLD(B) & TXLD(K). (The B for BASE, the K

for KEYBOARD).

Mount the patresses in relavant positions close to the TX1000 Base
Unit and the Slave Keyboard with cable entries made for the twin
twisted pair cable. Note that one patress has a hole drilled for a
power connector, this needs to be located at the Slave Keyboard.

• Line Length

The TxLD will perform optimally over any length of cable up to 1km
using the recommended cable type “BELDEN 9502”. Cables are easily
connected to the “WAGO” connectors on the PCB. Ensure cable run
is away from sources of interference and high current carrying
cables.

RELEASE
LEVER 3.

Connection of the twin twisted pair wires to the TXLD PCB’s is made
via the grey Wago connectors located on the reverse side. It is
important to maintain correct polarity and ensure that RX and TX
cross over.

TxLD WIRING INSTRUCTIONS.

TX A

RX A

TXLD(B)

Connections

1. INSERT SCREWDRIVER
PRESS LEVER TO OPEN
CAGE CLAMP

2. INSERT STRIPPED
CONDUCTOR

Twin Twisted Pair Cable

Wago Connectors

The Wago series 233 PCB
terminal block is a simple­to-use method of attaching
cables to PCB’s quickly and
easily. The correct method
of attachment is
illustrated to the left.

TX A
RX A

RX B

TXLD(K)

Connections

TxLD Keyboard Line Driver Installation Handbook Rev-02 Page 3

After connecting the twin twisted pair cable, screw back the mounting
plate of TXLD(B) and connect to the TX1000 base unit keypad 2
connector with the serial lead supplied. The TXLD(B) does not require
a power supply, it obtains its supply form the Base Unit.

Before screwing back the TXLD(K) mounting plate, make sure the hole
dilled for the power connector lines up with the connector on the
TXLD(K) PCB. Connect the Slave Keyboard power supply to the power
entry on the TXLD(K), plug in the Slave Keyboard. The keyboard will
not need a separate power supply as it is now powered through the
serial lead.

The video connection will need to be made from Monitor 2 output on
the TX1000 Base Unit, through the Slave Keyboard (for on-screen text) and
on to a monitor.

Graphic Illustration of TXLD

Tx1000 base unit

Upto 50M

Tx1000 Master Keyboard

10

B B V

00

1011121314151

9

PRE

PAT

SET

ROLSEQ

875 6431 2

6

CAM

SEL

ERA

ECT

MONI
TOR

PROG

#

RAM

IRISFOCUSZO

LE
NS

B B V

Tx1000 Slave Keyboard

LE

#

LE

B B V

NS

NS

AUTO
PAN

OM

3

P

TI

A

0

LT

+

N

0

TxLD(K)

10

B B V

00

1011121314151

9

CAM

SEL

ERA

ECT

MONI

PRE

PAT

TOR

SET

ROLSEQ

Keyboard PSU

PROG

875 6431 2

RAM

IRISFOCUSZO

6

TxLD(B)

Twin Twisted Pair

500M

LE
NS

AUTO
PAN

OM

3

P

TI

A

0

LT

+

N

0

TxLD Keyboard Line Driver Installation Handbook Rev-02 Page 4