Lexicon LR4 Larc Usr Gd Rev 0
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LR4 Front PanelMACH 1-4 LEDs Indicate which machine is currently selected for LARC control.Power Provides front panel control of power on/off. LED lights when power is on.Rear PanelAC Power Standard 3-pin IEC power connector. 1 0 0 - 1 15 / 2 3 0V , 5 0- 6 0 H z i n t er n a l switches set voltage.MACH 1-4 DE9 connectors for interface to LARC ports of Lexicon 224XL, 480L or 300L. LARC DE9 connector for interface with LARC (Lexicon Alphanumeric Remote Control). Operation The LR4 Framelink allows a single LARC to communicate with as many as four LARC compatible Lexicon processors (224XL, 300L or 480L). Each mainframe can be individually selected via the LARC and, once selected, operation is transparent - exactly as though the LARC were directly connected to that mainframe. LR4 power up behavior and default machine selection varies slightly depending on whether machines are connected and running when the LR4 is powered on, or are connected while the LR4 is running. If machines are connected and running when the LR4 is powered on, the LR4 will go through a brief set of internal diagnostics tests, then begin successively polling each MACH port to verify connections. After identifying the machine con- nected to each port, the LR4 will return to the lowest numbered port with a connected device and activate LARC control. For example, LARC control will default to MACH1 if a device is connected there. If devices are connected only to MACH 3
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Specifications subject to change without notice.LR-4 to Mainframe Cable When connecting the LR4 to a main- frame more than 10' away. use proper RS422, shielded 9-conductor cable, wired as shown to two 9-pin D-sub connectors (male).LR-4 to LARC Cable224XL, 480L or 300L224XL, 480L or 300L224XL, 480L or 300L224XL, 480L or 300LDimensions19.0"W x 1.75"H x 4"D (483x45x102mm) 19" rack mount standard, 1U high WeightNet weight: 2.75lbs (1.24kg) Shipping weight: 3.75lbs (1.7kg) Power Requirements100/115VAC, -5/+10% or 230VAC, +10%, 50-60 Hz, 10W (Factory set) Connectors3-pin IEC power connector Rear Panel Connectors5 female DE-9 connectors, RS-422 serial communication, 9600 Baud Front Panel Control5 LEDs, AC power switch EnvironmentOperating Temperature: 32° to 95°F (0° to 35° C) Storage Temperature: -22° to 167°F (-30° to 75°C) Humidity: 95% max without condensationSpecifications At the beginning of either identification cycle, the LARC will display the message SEARCHING FOR MAINFRAME in the upper display, and the port currently being addressed in the lower display. One of the LR4 LEDs will light to indicate the MACH port under interrogation. Once the mainframe con- nected to that port is identified, the LARC will display the machine identity and address this mainframe as if directly connected. To select another machine for LARC control, press and hold MACH, then immediately press 1, 2, 3 or 4 to select the device you want. If you do not press a numbered key, the LR4 will interrogate and identify the current port and return it to active status. (If you do not hold MACH