Measurement Computing DaqBoard-ISA - Manual (Page 20)

3-2 Hardware 02-14-02 DaqBoard-ISA User’s Manual
This following block diagram can be applied to DaqBoard-ISA models /100A, /112A, /200A, and /216A.
8 D E /16 S E
ana log inpu t
m ultiplex er
512-s tep
random acc ess
channel/gain
sequencer
Trigger
S elec t
P C (IS A )
B us
Interface
16-bit data
& add res s bus
D M A &
Interru pt
Interface
P rog ra m m a ble
s eq ue nc er
tim eb as e.
10 u s to 12 hrs
24-bit gen era l pu rp ose
digita l I/O lines
A n optional adap ter ca ble (C A -6 0) is
require d for ex ternal ac cess to 40-pin
ports P 2 and P 3 (loc ated on D aq B oa rds ).
16 h igh -s peed
digita l inputs
*M odels /1 00A and /2 00A .
5 c ounter/tim e r
c hanne ls
-or-
4 digital outputs
for high-speed
channel ex pans ion
4 general purpose
digital outputs
4K w ord
F IFO
data
buffer
S ignal
I/O
S eq ue nc er
res e t
B lo c k D ia g ra m fo r D a q B o a rd M od e ls /10 0 A , /11 2 A . /20 0 A , /2 1 6A
P 1
A N A LO G I/O
(D A S -1 6
c om pa tible)
P 2 *
D IG ITA L I/O
(P IO -12
c om pa tible)
P 3 *
P U LS E /F R E Q .
H IG H -S P E E D
D IG ITA L I/O
(C T M -05
c om pa tible)
P G A
per c han nel
c ontrol
E x terna l
M U X
A m plifier
S a m ple
&
H old
x 1, x 2
x 4, x 8
100 k H z
C lo ck
4 ge neral purpos e
digita l inputs
-or-
1 a uxiliary c ou nter gate
1 T T L trigger input
2 g ain selec t outputs for
ex pan sion bo ards
D C -D C
c onv erter
P C + 5V
P o w er S upp ly
+ 15
-15
A n alo g Trigge r-In
C om parator
12 or 16-bit,
100 kH z
analog-to-digital
conv erter
A D C
D ual 12-bit
digita l-to-
ana log
c onv erter
D ual-D A C
P
C
(I
S
A
)
B
u
s
4K - w ord F IF O
D ata B uffer
}
Block Diagram for DaqBoard Models /100A, 112A, 200A, and 216A