
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
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