26
•
Signal Connections
counter 0 is free for your applications. Figure 3.9 shows the 8254
timer/counter connection.
Counter 0
Counter 1
Counter 2
CLK0
GATE0
OUT0
CLK1
GATE1
CLK2
GATE2
OUT1
OUT2
2MHz
Oscillator
Vcc
A/D Trigger
CN3 Pin-34
CN3 Pin-37
CN3 Pin-33
CN3 Pin-16
CN3 Pin-35
INT
EXT
8254 Timer/Counter
Figure 3.9 Block Diagram of 8254 Timer/Counter
The clock source of counter 0 can be internal or external, while the gate
can be controlled externally and the output is send to the connector CN3.
As to counter 0 and counter 1, the clock source is internally fixed, while
the gate can be controlled externally and the output is send to the
connector CN3 too. All the timer/ counter signals are TTL compatible.
3.6 Daughter Board Connection
The ACL-8112 can be connected with five different daughter boards,
ACLD-8125, ACLD-9137, ACLD9182, ACLD9185, and ACLD9188. The
functionality and connections are specified as follows.
3.6.3 Connect with ACLD-8125
The ACLD-8125 has a 37-pin D-sub connector, which can connect with
ACL-8112HG through 37-pin assemble cable. The most outstanding
feature of this daughter board is a CJC ( cold junction compensation)
circuit on board. You can directly connect the thermocouple on the ACL-
8125 board.
3.6.4 Connect with ACLD-9137
The ACLD-9137 is a direct connector for the card which is equipped with
37-pin D-sub connector. This board provides a simple way for connection.
,
Pin-
16
Summary of Contents for ACL-8112 Series
Page 1: ...NuDAQ ACL 8112 Series Enhanced Multi Functions Data Acquisition Cards User s Guide ...
Page 4: ......
Page 40: ...32 Registers Format 1 1 1 1 1 000 Unipolar N A Table 4 2 1 Function of the Gain Control Bits ...
Page 44: ...36 Registers Format Base 14 DO15 DO14 DO13 DO12 DO11 DO10 DO9 DO8 ...
Page 46: ...38 Registers Format Base 2 Counter 2 Register R W Base 3 8254 CONTROL BYTE ...
Page 71: ...C Language Library 63 ...
Page 81: ...C Language Library 73 Example See Demo Program AD_Demo4 C ...
Page 85: ...C Language Library 77 ERR_AD_INTNotSet Example See demo program AD_Demo2 C ...