Theory of Operation

Temperature Sense Board. The Temperature Sense board (A2) monitors the exhaust air temperatures for each slot within the mainframe. The Temperature Sense Board connects to the backplane through the ribbon cable at J16.

Enhanced Monitor Board. Your IntelliFrame Mainframe comes standard with the Enhanced Monitor board. The Front Panel Display board is standard on the VX1420A and is Option 1M on the VX1410A. The Enhanced Monitor board (A7) collects the monitoring information from the power supply, fans, and Temperature Sense board and passes it to the 25-pin D connector. The Monitor board connects directly to the backplane at 0J3, 0P1 and 0P2. The Enhanced Monitor includes a nine-pin RS-232 port to connect to an external host. Address switches near the bottom rear of the board allow you to select the VXIbus address. A green READY indicator and amber ACCESSED indicator located at the bottom of the board indicate the operating status of the mainframe.

VX1410A-The two fans connect to the Monitor board at J7 (Fan2) and J8

(Fan1). The Fan Speed switch (S3) selects either variable fan speed (VAR) or full speed (FULL).

VX1420A-The blower connects to the Monitor board at J8 (Fan2). The Fan Speed switch (S3) lets you select either variable fan speed (VAR) or full speed (FULL).

Table 3±1 on page 3±2 shows the pinouts of the 25-pin D connector.

The Enhanced Monitor board also has circuitry to allow you to communicate with the mainframe with SCPI commands. These commands are detailed in the Reference section of this manual.

An Auxiliary Power input connector is available to connect 5 volts from an outside source to power the communication circuitry in the event of power failure of the mainframe.

Mainframe with Option 1M Option 1M provides your VX1410A mainframe with a Front Panel Display board. You may upgrade your mainframe with a front panel display by ordering the VXF1M field upgrade kit. This display should be standard on your VX1420A mainframe.

Display Panel. The Front Panel Display board (A6) has a 20-character alphanumeric display that displays the system messages on the front panel. Scroll keys allow you to scroll through the messages one at a time. The Front Panel Display board connects to the backplane through the ribbon cable at J18.

VX1410A & VX1420A IntelliFrame Mainframe Instruction Manual

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