RDM-Net

The Easy Way to Distribute DMX / RDM from
GDC

● Modules fit in a single gang wall box
● RDM/ DMX512 compatible distribution
● Modules are multi-protocol hubs
● Fault isolation
● Relaxed networking rules
● Flexible controller placement
● Ideal for wire way and plug strip installation
● Fewer home runs
● Offers lower costs
● Available using established, open technologies

The RDM/DMX protocol combination is fast becoming the first choice for bi-directional data delivery. RDM-Net modules provide a flexible, cost efficient distribution method for those protocols. With most distribution systems, RDM requires that the controller be located only at one end of the network. If splitters are used, the controller is connected to the input on the first splitter. The RDM-Net modules provide a much less restrictive distribution approach. Each of the modules acts as an RDM hub. Controller placement is flexible because input modules can be placed at any point on the network.

In many installations RDM-Net allows you to configure a RDM distribution system without using patch panels or complicated routing switchers. Use RDM-Net coupled with other technology nodes (like DMX over Ethernet) to multiply the number of ports at reasonable cost.

RDM-NET discourages excessive daisy-chaining, making fault isolation easier and time to repair shorter. Instead of one DMX outlet in the FOH slot, put in four or five; a damaged cable will disable only a few color scrollers instead of every FOH unit. Install an input and then take your DMXter4 with you, for easier trouble shooting.

Unlike systems using passive wall plates, the RDM-Net user doesn’t need to know the hidden wiring topology. Each output provides a galvanically isolated RDM controller port with a guaranteed full strength signal. There are no hidden stubs. No other outlets with unterminated or over terminated cables to cause reflections. Ground loops are controlled. Radio frequency grounding is stable, unlike with ad hoc portable splitters.

The system consists of two types of RDM port modules, one for input and one for output. They are fitted with Neutrik connectors and will fit in a single gang box. They are ideal for use in low voltage chambers of power battens and truss wire ways.

The first input module to sense that it is receiving data becomes the system input, locking out all other input modules. This prevents multiple controllers from driving the line. If the system is idle for more than two seconds all inputs are activated.

Each module has a bi-color tally LED. The LED indicates the status of each module - is it powered and available, is it inputting or outputtng data, or is there a fault condition.?

Each module is connected by a two piece screw terminal connector to a private RDM distribution buss. The buss provides a DMX/RDM pair, power, power common, and shield. All modules include a terminator for the private buss; the ones at the ends of the buss are enabled during installation. If required the private buss may have branches (star topology). This requires adding a branching module for each branch.

The low cost of the hardware and installation of RDM-Net will allow more RDM ports, more flexibility, and greater fault isolation. Even in systems using DMX512 alone, RDM-Net allows the creation of flexible networks that are impossible with any standard splitter topology.

PRICE LIST
DESCRIPTION	Part Number	UNIT PRICE
Input module:	FN RDM_MOD IN	$195
Output module:	FN RDM_MOD	$198.
Cover plate:	FN 1GSS	$12
For delivery within NY state add applicable sale tax.
Systems require a regulated power supply of 9-18 volts at 100mA per module..

Goddard Design Company
51 Nassau Ave.
Brooklyn NY 11222 USA
718 599-0170 718 599-0172 fax
http://www.goddarddesign.com

Technical details and electrical specification on another page.