HP 98568A Installation Instruction page 485

HP 46085A Control Dials Module
Installation Procedure
Note
Connecting and disconnecting HP-HIL devices while some
language/ operating systems or application programs are
running may lead to unpredictable results. When possible,
connect all needed HP-HIL devices to your computer before
booting a language/operating system or running an application
program.
1. Find the HP-HIL cable that came with the control dials module.
2. Find the end of the cable that is marked with one black dot.
3. Find the HP-HIL connector on the control dials module that is marked with
one dot.
4. Plug the "one-dot" end of the cable into the "one-dot" connector on the
control dials module.
5. Connect the other, "two-dot" end of the cable into the HP-HIL connector on
your computer (marked "KYBD" or "KEYBOARD"), or to the "two-dot"
connector of the last HP-HIL device you installed (e.g. keyboard).
6. Keep these constraints in mind:
• You cannot have more than 7 HP-HIL addressable devices connected to
your computer at one time. The HP 46080A, 46081A, 46082A and 46082B
Extension modules and the HP 46089A Four-Button Cursor do not count
as addressable devices, and the HP 46085A Control Dials Module counts
as three addressable devices. All other devices count as one addressable
device .
• The current requirements of all of your devices must not exceed 750
milliamps (rnA). To make sure you do not exceed this requirement, total
up the typical power required by each of your HP-HIL devices as given in
the following "Worksheet Entries" sections. If the total exceeds 750 rnA,
you must remove one or more devices.
Adding Miscellaneous Peripherals 10-43