Advantech Carbon Monoxide Alarm PCI-1718 Series User Manual
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Chapter 3
3.3.1 I/O Connector Signal Description
Table 3.9: I/O Connector Signal Descriptions
Signal
Name
Name
Refere
nce
nce
Direct
ion
ion
Description
A/D S
<0..15> A.GND
Input
Analog input (single-ended), channels 0
through 15.
A/D H
<0..7>
A.GND
Input
Analog input high (differential), channels 0
through 7.
A/D L
<0..7>
A.GND
Input
Analog input low (differential), channels 0
through 7.
D/A
A.GND
Output Analog output
AGND -
-
Analog Ground. The two ground references
(A.GND and D.GND) are connected together
on the PCI-1718HDU/HGU card.
D/O
D.GND
Output Digital output, channels 0 through 15.
D/I
D.GND
Input
Digital input, channels 0 through 15.
CLK
D.GND
Input
Clock input for the 8254.
GATE
D.GND
Input
Gate input for the 8254.
OUT
D.GND
Output Signal output for the 8254.
VREF
D.GND
Output Voltage reference.
REFIN D.GND
Input
External voltage reference input.
S1-S4
D.GND
Output Daughterboard channel select.
DGND -
-
Digital Ground. The two ground references
(A.GND and D.GND) are connected together
on the PCI-1718HDU/HGU card.
+12V
D.GND
Output
+12 VDC Source (from ISA bus directly with
FUSE protection).
+5V
D.GND
Output +5 VDC Source (from ISA bus directly with
FUSE protection).
NC
-
-
No connection.