ADLINK Technology NuDAQ ACL-8454, User Manual

Page: 34 / 65

24
•
Installation
Digital Output (DO)
GND
Digital Input(DI)
From TTL Devices
To TTL Devices
ACL-8454
Outside Device
Figure 2.13 Digital I/O Connection
2.14 Summary of Default Setting
l
Chip #1 and chip #2 are installed. Counter #1 ~ counter #6 are
available. Chip #3 and chip #4 are not installed.
l
Counter #1~ #4 and counter #7~#10
CLK n = CLOCK1 n
GATE n = ExtG n
l
Counter #5 and Counter #6
CLK5 = 1 MHz
CLK6 = COUT5
GATE11,12 are default enable
l
Counter #11 and Counter #12
CLK11 = 1 MHz
CLK12 = COUT11
GATE11,12 are default enable
2.15 Notes for Installing More 8254 Chips
The user can install 8254 chips to ACL-8454 card by yourself.
Before install the additional 8254 chip, please make sure the ACL-
8454 card is rem oved from the PC slot, no power is applied and no
external daughter board is attached.
When plugging 8254 chips, please check the pin of chips must not
be fold and install the chip into the socket carefully. After installing
the chip, please configure the jumper setting of the ACL-8454 card
according to your application. At first the clock source of counter #7 ~
#10 should be set. The gate source of counter #7~#10 can not be
configured, however, user should notice whether if any external gate
source or digital signal is connected to the signals. The un-wanted