Lightronics TX30 User Manual

Page 1 of 6

TX – 30 PROTOCOL TRANSLATOR

Revision 0.2 OWNERS MANUAL 03/02/2005

DESCRIPTION

The TX-30 is a very compact in-line translator which receives USITT DMX-512 signals and transmits the
Lightronics (LMX-128) multiplex protocol. This is the industry standard multiplex protocol. The unit is powered by
the dimmer chain to which it is connected or may optionally be powered by an external plug-in power supply.

CONNECTIONS

DMX input is received via a 5 pin male XLR connector. LMX output is via a 3 pin female XLR connector. A 5 pin
female XLR is also provided for the DMX signal “pass thru”. LED indicators display power and input signal status.

DMX IN

OPERATION

The TX-30 translates and sends LMX-128 automatically when power is appli ed and a DMX signal is present.
LED indicators show the power and DMX incoming signal status.

CHANNEL ASSIGNMENT
The TX-30 translates 192 channels at a time. Eight of the DIP switches on the front of the unit are used to select

the starting channel of the 192 channel block. When all switches are down, channels 1 - 192 are selected.
Channel selection is incremented two channels at a time. A table of address switch settings is included at th e
back of this manual.

HOLD FUNCTION
DIP switch number 2 activates a "hold" function. If this switch is in the up position, channel outputs will remain at

their current levels indefinitely upon loss of DMX signal.
DMX TERMINATOR
DIP switch number 1 will terminate the DMX input bus when it is in the DOWN position.

www.lightronics.com
Lightronics Inc 509 Central Drive Virginia Beach, VA 23454 Tel [phone]

LMX OUT AMX OUT DMX OUT

Page 2 of 6

TX – 30 PROTOCOL TRANSLATOR

Revision 0.2 OWNERS MANUAL 03/02/2005

TX192 OPTION

The TX-30 may be optionally supplied to transmit the AMX-192 protocol. This model transmits both LMX and
AMX simultaneously. An external power supply is included and is needed with this option. The AMX-192 output
signal is transmitted from a 4 pin, male, XLR connector located at the rear of the unit.

CAUTION: Some AMX dimmer equipment uses a 4 pin MINI-DIN connector for the control signal. That
connector is NOT wired the same as the 4 pin XLR connector. The following table provides the information
needed to make an adapter cable.

AMX-192 CONNECTOR WIRING

Signal
Name

Common 1 2

Clock + 2 3

AMX Signal 3 4

Clock - 4 1

EXTERNAL POWER SUPPLY INFORMATION

Input Voltage: 120VAC
Output Voltage: 13.5 VAC
Output Current: 800 Milliamps
Connector: 2.1mm female connector

The TX-30 will operate using an alternative external power supply which can provide anywhere from 13 to 24
Volts AC or DC. The supply must be rated at 600 ma. If a DC supply is used, the center pin of the connector
MUST BE THE NEGATIVE output terminal of the supply.

MAINTENANCE AND REPAIR

TROUBLESHOOTING

 Verify the cables (a very common source of problems!).
 Ensure that a ll system units are powered - particularly the dimmer to which the translator is connected.
 Check address settings at dimmers, console, and translator. Check console patch configuration.

REPAIR
There are no user servicable parts in the unit. Internal service by other than Lightronics authorized agents wi ll

void the warranty. If service is required, contact the dealer from whom you purchased the unit or contact the
Lightronics Service Dept..

XLR

Connector

Pin #

MINI-DIN

Connector

Pin #

www.lightronics.com
Lightronics Inc 509 Central Drive Virginia Beach, VA 23454 Tel [phone]