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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