Operating Basics
cooling required by the modules. When the switch is in the FULL position, the fans operate at full speed.
A DB-25-pin connector provides the ability to monitor the power supply voltages, fan speeds, and the maximum slot temperature rise of the mainframe. Refer to page 3±1 for information on the pinouts of the connector.
Fan filter
25-Pin PASSIVE
MONITOR connector
Fan speed switch
Fuse
AC Power 
Figure 2±3: Rear view of a IntelliFrame Mainframe
WARNING. To prevent damage to the instrument do not connect an RS-232 cable to the 25-pin connector. The connector is not an RS-232 connector. Connecting an RS-232 cable to the connector can result in damage to the equipment.
The Enhanced Monitor, in addition to the DB25-pin connector and the fan switch, includes a 9-pin RS-232 D-connector to provide RS-232 communication, Logical Address switches, an auxiliary power connection and status lights (see Figure 2±4). For information on the pinouts of the RS-232 connector, see Table 3±2 on page 3±5.
VX1410A & VX1420A IntelliFrame Mainframe Instruction Manual | 2±3 |