User`s manual
XP850024 s I/O Configurations
Excitation Resistors
Some transducers, such as thermistors, require an excitation voltage, par-
ticularly in some ratiometric applications. These excitation voltages are
set using excitation resistors in the RP2 sockets, as shown in Figure 3-5.
Either a resistor pack or individual resistors may be used.
Figure 3-5. Optional XP8500 Excitation Resistors
EEPROM
The jumpers on header J3 write-protect the calibration contents stored in
the upper half of the EEPROMthe lower half cannot be write-protected.
Figure 3-6 shows the jumper settings for the EEPROM.
Figure 3-6. XP8500 EEPROM Jumper Settings for Header J3
See Chapter 4, Software Reference, for details on how to
read and write the EEPROM contents.
+5 V +5 V +5 V +5 V
CH3
CH2CH1
CH0
RP2 RP2 RP2 RP2
J3
Write-Protect
FD
J3
Write-Enable
$