Measurement Computing CIO-RELAY08 - Manual (Page 7)

3 HARDWARE INSTALLATION
3.1 MERCURY (/M) BOARD SPECIAL CONSIDERATIONS
The Mercury wetted boards must be m ounted in the computer such that they will
remain within 30 degrees of vertical.
NOTE: Installation of these boards in most tower computer cases will require the
tower be rested on its side for proper operation of the mercury relays.
3.2 BASE ADDRESS
The base address switch controls the I/O location where the CPU can access the
registers of the CIO-RELAY board. The factory default is 300h (768D). If you have
a board installed at address 300h, you will have to choose a new address from those
available on your computer. You may use the list of PC I/O address assignments
found on the following page and add notes about the b oards you have installed in
your computer. Choose a new base address f rom those available and set the switch
using the guide below.
NOTE: The switch shown below in Figure 3-1 is for the CIO-RELAY08 and
CIO-RELAY16 boards. Since the CIO-RELAY32 and CIO-RELAY24 board
require four I/O addresses, their
base address switch does not
provide switch #2. All other
settings are identical.
If address 300h is available on your
computer, we recommend that you
select it for your board. The
software examples are written for
base = 300h.
Figure 3-1. Base Address Switches -
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