User`s manual

Signal Connections 13
3 Signal Connections
This chapter describes the connectors of DAQ/PXI-2500 SERIES,
and the signal connection between DAQ/PXI-2500 SERIES and
external devices.
3.1 Connectors Pin Assignment
DAQ/PXI-2500 SERIES is equipped with two 68-pin VHDCI-type
con-nectors (AMP-787254-1). It is used for digital input / output,
analog input / output, and timer/counter signals, etc. The pin
assignments of the connectors are defined in the figures below.
AO_0 135 AGND
AO_1 236 AGND
AO_2 337 AGND
AO_3 438 AGND
AOEXTREF_A/AI_0 539 AGND
AI_1 640 AGND
EXTATRIG/AI_2 741 AGND
AOEXTREF_B/AI_3 842 AGND
AO_4/AI_4 943 AGND
AO_5/AI_5 10 44 AGND
AO_6/AI_6 11 45 AGND
AO_7/AI_7 12 46 AGND
AO_TRIG_OUTA 13 47 EXTWFTRG_A
AO_TRIG_OUTB 14 48 EXTWFTRG_B
GPTC1_SRC 15 49 VCC
GPTC0_SRC 16 50 DGND
GPTC0_GATE 17 51 GPTC1_GATE
GPTC0_OUT 18 52 GPTC1_OUT
GPTC0_UPDOWN 19 53 GPTC1_UPDOWN
RESERVED 20 54 DGND
AFI1 21 55 AFI0
PB7 22 56 PB6
PB5 23 57 PB4