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TN1003 - LecNet Serial and AMX Cable Wiring Diagrams

Serial Cable Wiring Diagram

The serial port on the LecNet device is a minimal RS-232 implementation. The figure shows the wiring diagram to accommodate interconnection with either a 9 or a 25 pin serial port on a PC or other serial device.

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Since LecNet devices don’t drive the Host RX line except when addressed, the Host RX line will sometimes be in a “floating” state. The 10k, 1/4W resistor will be needed for a small number of PCs whose serial port hardware requires the Host RX line to be pulled low when the RX line is idle. Symptoms that would indicate the need for the resistor include the inability for the PC to identify LecNet devices when running the Lectrosonics supplied software, or intermittent identification.

NOTE THAT LECNET MASTER PRO VERSION 2.3 OR HIGHER PLUS THE OTHER CONTROL PANEL EXECUTABLES FROM THE LECNET 2.3 SETUP DISKS ARE NECESSARY TO SUPPORT THIS MODIFICATION. SIMPLY RE-INSTALL COMPLETELY FROM THE LECNET 2.3 OR HIGHER SETUP DISKS TO ASSURE UP-TO-DATE EXECUTABLES.

AMX Cable Wiring Diagram

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AMX Programming Notes

If you are using an AMX system to control your LecNet equipment, you'll want to purchase the Lectrosonics PT3 Protocol Translator. The PT3 connects between the AMX bus and any LecNet equipment. With the PT3, the LecNet equipment looks just like native AMX equipment. The PT3 is the fastest and most productive way to control LecNet devices with an AMX system.