ADLINK PXI-7921 - Manual (Page 18)

12 • Signal Connection
46. COM3- 26. CH9A- 4. CH1A-
47. CH6B+ 27. CH10A+ 5. CH2A+
48. CH6B- 28. CH10A- 6. CH2A-
49. CH7B+ 29. CH11A+ 7. CH3A+
50. CH7B- 30. CH11A- 8. CH3A-
51. CH8B+ 31. CH0B+ 9. CH4A+
52. CH8B- 32. CH0B- 10. CH4A-
53. CH9B+ 33. CH1B+ 11. CH5A+
54. CH9B- 34. CH1B- 12. CH5A-
55. CH10B+ 35. CH2B+ 13. COM0+
56. CH10B- 36. CH2B- 14. COM0-
57. CH11B+ 37. CH3B+ 15. COM1+
58. CH11B- 38. CH3B- 16. COM1-
59. 1WireloRef* 39. CH4B+ 17. CH6A+
60. TRG_IN 40. CH4B- 18. CH6A-
61. S_ADV 41. CH5B+ 19. CH7A+
62. SHDNn 42. CH5B- 20. CH7A-
21. GND
*not used in four-wire mode
Table 3: Pin Assignment (4 wire)
Signal Name Type Description
COM0± (one wire)
COM<0..3>± (two wire)
COM<0..1>A±(four wire)
COM<0..1>B± (four wire) Input/Output Common---The common for each bank.
CH<0..47> (one wire)
CH<0..23>± (two wire)
CH<0..11>A± (four wire)
CH<0..11>B± (four wire) Input/Output Channels---Where signals are connected
to the switch card. CHχ+ and CHχ- are
switched together.
1WireLoRef Input/Output 1 Wire Low Reference---The common
reference signal used in one-wire mode.
TRG-IN Input Trigger Input---Trigger from an
instrument to advance the switch card to
the next scan entry.
S_ADV Output Scanner Advanced---Trigger to an
instrument that indicated the switch card
has advanced to the next scan and relays
are debounced.
SHDNn Input Emergency Shutdown---The trigger used
to shutdown the system.
+5V OUT Output +5V VDC Source---Provide +5 power
pin.
GND Output Ground---Provide system ground pin.