User`s manual

Signal Connections 19
Legend:
*PIO means Programmable Input/Output
Pin # Signal Name Reference Direction Description
1~4 AO_<0..3> AGND Output
Voltage output of DA channel
<0..3>
5 AOEXTREF_A/AI_0 AGND Input
External reference for AO
channel <0..3> / AI input 2
6 AI_1 AGND Input AI input 0
7 EXTATRIG/AI_2 AGND Input
External analog trigger / AI
input 1
8 AOEXTREF_B/AI_3 AGND Input
External reference for AO
channel <4..7> / AI input 3
9~12 AO_<4..7>/AI_<4..7> AGND Output/Input
Voltage output of DA channel
<4..7> / AI channel <4..7>
(only for DAQ-2501)
13,14 AO_TRIG_OUT_<A,B> DGND Output
AO trigger signal for channel
<0..3> <4..7>
15,16 GPTC<0,1>_SRC DGND Input Source of GPTC<0,1>
17,51 GPTC<0,1>_GATE DGND Input Gate of GPTC<0,1>
18,52 GPTC<0,1>_OUT DGND Input Output of GPTC<0,1>
19,53 GPTC<0,1>_UPDOWN DGND Input Up/Down of GPTC<0,1>
20 RESERVED — — Reserved Pin
21,55 AFI<1,0> DGND Input Auxiliary Function Input
,22,56,23,57
,24,58,25,59
PB<7,0> DGND PIO*
Programmable DIO of 8255
Port B
26,60,27,61,
29,63,30,64
PC<7,0> DGND PIO*
Programmable DIO of 8255
Port C
31,65,32,66,
33,67,34,68
PA<7,0> DGND PIO*
Programmable DIO of 8255
Port A
35~46 AGND — — Analog ground
47,48 EXTWFTRIG_<A,B> DGND Input
External waveform trigger for
AO channel <0..3> <4..7>
49 VCC DGND
Power
(Output)
+5V Power Source
28,50,54,62 DGND — — Digital ground
Table 3-2: VHDCI-type (68-pin) Connector Legend