J7 and j8, 40-pin headers for – Measurement Computing DaqBoard 3000USB Series User Manual
Page 48
2-4 Connections & Pinouts
927593
DaqBoard/3000USB Series User’s Manual
J7 and J8, 40-Pin Headers for
Digital Ports, Counters, Timers, DACS, Triggers, Pacer Clocks and Other Signals
Note: The 4 DAC channels are available for DaqBoard/3001USB and /3031USB.
The DACs do not apply to DaqBoard/3005USB and /3035USB.
This edge of the header is closest to the
board’s center. Note that pins 2 and 40
are labeled on the board silkscreen.
Digital CH.
Pin
J7
Pin
Digital CH.
Signal
Pin
J8
Pin
Signal
Digital GND
1 2
XAPCR
*
+13VA (Fig. 1)
1 2
-13VA (Fig. 2)
CH A0
3
4
CH A4
--X--
3 4
--X--
CH A1
5
6
CH A5
Analog Com.
5
6
Analog Com.
CH A2
7
8
CH A6
XDAC0
7
8
XDAC2
P
O
R
T
A
CH A3
9
10
CH A7
P
O
R
T
A
XDAC1
9
10
XDAC3
Digital GND
11 12
XTTLTRG
Analog Com.
11
12
Analog Com.
CH B0
13
14
CH B4
SelfCal (Fig 3)
13 14
SGND
**
CH B1
15
16
CH B5
Analog Com.
15
16
Analog Com.
CH B2
17
18
CH B6
XTTLTRG 17
18
XDPCR
***
P
O
R
T
B
CH B3
19
20
CH B7
P
O
R
T
B
XAPCR*
19
20
Digital GND
Digital GND
21
22
Exp +5 Volts
Digital GND
21
22
Digital GND
CH C0
23
24
CH C4
--X-- 23
24 --X--
CH C1
25
26
CH C5
Exp. +5 Volts
25
26
Aux Pwr (Fig. 4)
CH C2
27
28
CH C6
--X-- 27
28 --X--
P
O
R
T
C
CH C3
29
30
CH C7
P
O
R
T
C
--X-- 29
30 --X--
Digital GND
31 32
Timer
1
--X-- 31
32 --X--
Timer 0
33
34
Counter 1
--X-- 33
34 --X--
Counter 0
35
36
Counter 3
--X-- 35
36 --X--
Counter 2
37
38
Digital GND
--X-- 37
38 --X--
Digital GND
39
40
Digital GND
--X-- 39
40
--X--
*
XAPCR = A/D Pacer Clock I/O
-- X-- = Not Connected
** SGND = Signal Ground (Low Level Sense Common)
*** XDPCR = DAC Pacer Clock I/O
J8 Pinout Figure References for Pins 1, 2, 13, and 26
Figure 1. J8 / Pin 1, for +13VA
Figure 2. J8 / Pin 2, for -13VA
Figure 3. J8 / Pin 13, for Self Calibration
Figure 4. J8 / Pin 26, for Auxiliary Power