PXI-79010 pages

Switches

PXI-7901
16-CH General-Purpose SPDT Relay Module

Introduction
ADLINK’s PXI-7901 is a general-purpose (GP) switch module implementing 16-CH independent single-pole
double-throw (SPDT) relays (1 Form C). The PXI-7901 can connect one input to one output and be used as
signal switching and routing for measurement systems or ATE. Thanks to its high switching capacity, PXI-7901 can
also be used to turn on or turn off devices such as motors, fans, heaters, and lights.
The contact position of the relays can be changed either by direct software commands or by following the
instructions previously stored in the onboard scan list. The scan list advances upon the trigger from external
measurement devices, such as a DMM. The scan list could also advance when the scan-delay timer expires.
In the PXI-7901, PXI trigger functions are supported and software programmable. Multiple modules can
therefore be synchronized without additional field wiring.

Specifications

Ordering Information

Relay Characteristics

Features
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PXI specifications Rev. 2.2 compliant
3U Eurocard form factor, CompactPCI compliant
(PICMG 2.0 R3.0)
PICMG 2.1 R2.0 CompactPCI Hot Swap specifications t
compliant
16-CH SPDT (1 Form C) non-latching relays
Switching capacity
• 3 A switching, 3 A carrying
• 220 VDC, 250 VAC
125 operations per second for full settling
Onboard 1 k-sample scan list for deterministic scanning
Handshaking signals for external instruments synchronization
Design for safety-critical applications
Hardware emergency shutdown with programmable relay t
safety status
Watchdog timer from 1 ms to 420 s with programmable t
relay safety status
8 auxiliary 3.3 V/TTL digital inputs/outputs with 5 V tolerance
Multiple modules synchronization through PXI trigger bus t
and star trigger
Fully software programmable

t ■t Number of channels: 16
t ■t Relay type: SPDT (1 Form C), non-latching
t ■t Switching capacity
tt · Max. switching current: 3 A
tt · Max. switching voltage: 220 VDC, 250 VAC
tt · Max. switching power: 50 VA, 60 W
tt · Max. carrying current: 3 A
t ■t Contact resistance: 150 mΩ max.
t ■t Relay set/reset time
tt · Operate time: 5 ms max.
tt · Release time: 5 ms max.
tt · Bounce time: 3 ms max.
t ■t Expected life
tt · Mechanical life: 108 operations min.
tt · Electrical life: 105 operations min.
tt (0.4 A @ 125 VAC, resistive load)
t ■t Data transfer: Programmed I/O

■tPXI-7901
t 16-CH General-Purpose SPDT Relay Module
* Failure rate indicates the lower limit of switching
capacity of a relay contact at a reliability level of 60%

Terminal Boards & Cables
■tTB-6201-01
t General-Purpose Switch Terminal Board with
t one 62-Pin D-Sub Female Connector
■tACL-10262
t 62-pin D-sub male/female cable, 1 M
t (For more information about mating cables, please refer
t to P4-28.)

Auxiliary Digital I/O
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Numbers of channel: 8 inputs/outputs
Compatibility: 3.3 V/TTL (5 V tolerant)

Terminal board TB-6201-01

Handshaking Signals

Pin Assignment

t ■t Programmable polarity
t ■t Logic level: 3.3 V/TTL (5 V tolerant)
t ■t TRG_IN source: AUX1, PXI trigger bus,
tt PXI star trigger input
t ■t S_ADV destination: AUX0, PXI trigger bus,
tt PXI star trigger outputs (in the star trigger slot)t

22. COM0

43. NO0t

23. COM1t

1. NC0

44. NO1t

24. COM2t

2. NC1

Safety Functions

45. NO2t

25. COM3t

3. NC2

Emergency shutdown
t t · Logic level: 3.3 V/TTL (5 V tolerant)
t t · Active: logic low
t ■t Watchdog timer
tt · Base clock available: 10 MHz, fixed
tt · Counter width: 32-bit

46. NO3t

26. COM4t

4. NC3

47. NO4t

27. COM5t

5. NC4

48. NO5t

28. COM6t

6. NC5

49. NO6t

29. COM7t

7. NC6

50. NO7t

30. COM8t

8. NC7

■tDriver Support

General Specifications

51. NO8t

31. COM9t

9. NC8

52. NOt

32. COM10t

10. NC9

53. NO10t

33. COM11t

11. NC10

54. NO11t

34. COM12t

12. NC11

55. NO12t

35. COM13t

13. NC12

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■tOperating Systems
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• Windows Vista/XP/2000/2003

■tRecommended Software
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• VB/VC++/BCB/Delphi

• DAQBench
• ADL-SWITCH for Windows

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I/O Connector: 62-pin D-sub male
■t Operating temperature: 0˚C to 55˚C
■t Storage temperature: -20˚C to 70˚C
■t Relative humidity: 5% to 85% non-condensing
■t Power requirements: (when all relays are ON)

CN1

Device

+5 V

+3.3 V

56. NO13t

36. COM14t

14. NC13

PXI-7901

700 mA

400 mA

57. NO14t

37. COM15t

15. NC14

58. NO15t

38. N/Ct

16. NC15

59. N/Ct

39. N/Ct

17. N/C

60. AUX3t

40. AUX4t

18. AUX2/SHDNn

61. AUX6t

41. +5Voutt

19. AUX5

62. AUX7t

42. AUX1/TRG_INt

20. GND

t ■t Dimensions (not including connectors)
tt · 160 mm x 100 mm
Certifications
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EMC/EMI: CE, FCC Class A

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Updated 03-28, 2012. ©2012 ADLINK Technology, Inc. All Rights Reserved. All specifications are subject to change without further notice.

21. AUX0/S_ADVt
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