Scanning NI Switches with NI Digital Multimeters

NI Switches Help

Edition Date: April 2015

Part Number: 375472H-01

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In applications where you are connecting multiple test points to a Digital Multimeter (DMM), it may be appropriate to incorporate a switch to route signals between the test points and the DMM. Scanning can be used when the timing of connections needs to be synchronized with the DMM. To determine whether your DMM can exchange signals with NI switches during multipoint scanning operations, refer to the Scanning Switch Modules topic in the NI Digital Multimeters Help. When scanning NI switches with NI DMMs, the following factors will influence your scanning setup:

Refer to Single Module Scanning and Multiple Module Scanning for details on how to select the scanning setup that fits your needs.

Note Note  Some devices may not support scanning. Refer to your device book for more information about supported features.

Trigger Options

The trigger inputs and outputs that are available for your NI switch, in conjunction with your system and scanning selections, will determine how trigger signals are sent between your NI Switch and your NI DMM. The following table lists the trigger input and output options for all NI switches.

Trigger Options for National Instruments Switches

Switch INPUT
Trigger Input
OUTPUT
Trigger Output
SCXI-1127
SCXI-1128
SCXI trig 0, Front, Rear SCXI trig 2, Front
SCXI-1129 all SCXI trig, Front, Rear all SCXI trig, Front
SCXI-1130
SCXI-1166
SCXI-1167
SCXI-1193



all SCXI trig, Front, Rear
SCXI-1169
SCXI-1175
SCXI-1194
SCXI-1195



all SCXI trig, Rear
PXI-2501
PXI-2503
PXI/PXIe-2529
PXI-2530
PXI-2530B
PXI/PXIe-2543
PXI-2566
PXI-2567
PXI/PXIe-2593







all PXI trig, Front
PXI-2510
PXI/PXIe-2512
PXI/PXIe-2514
PXI/PXIe-2515
PXI/PXIe-2527
PXI/PXIe-2531
PXI/PXIe-2532
PXI/PXIe-2532B
PXI-2533
PXI-2534
PXI-2535
PXI-2536
PXI-2545
PXI-2546
PXI-2547
PXI-2548
PXI-2549
PXI-2554
PXI-2555
PXI-2556
PXI-2557
PXI-2558
PXI-2559
PXI-2564
PXI-2565
PXI-2568
PXI/PXIe-2569
PXI-2570
PXI-2571
PXI/PXIe-2575
PXI-2576
PXI-2584
PXI-2585
PXI-2586
PXI-2590
PXI-2591
PXI-2594
PXI-2595
PXI-2596
PXI-2597
PXI-2598
PXI-2599
PXI-2720
PXI-2722
PXIe-2725
PXIe-2727








































all PXI trig
PXIe-2524
PXIe-2525
PXIe-2526
PXIe-2737
PXIe-2738
PXIe-2739
PXIe-2746
PXIe-2747
PXIe-2748
NI 2810
NI 2811
NI 2812
NI 2813
NI 2814
NI 2815
NI 2816
NI 2817
NI 2833
NI 2834
SCXI-1160
SCXI-1161
SCXI-1163R
SCXI-1190
SCXI-1191
SCXI-1192


Triggering is not supported

where

SCXI trig refers to SCXI trigger lines 0-7

PXI trig refers to PXI trigger lines 0-7

Rear refers to the rear connector

Front refers to the front panel or terminal block

System Options

You can categorize different DMM/switch systems according to the DMM, the switch and the cable used. The following figure represents each possible system with a letter.

DMM/Switch System Options

DMM/Switch System Options

The systems are classified as follows:

  • System A—The DMM controls and triggers the SCXI switch using the internal PXI/SCXI lines of a PXI/SCXI combo chassis. The DMM is placed in the rightmost PXI slot of a combo chassis. The DMM must not be PXI express compatible.
  • System B—The DMM does not control the SCXI switch but triggers it using the AUX trigger cable. The SCXI switch is controlled by another device.
  • System C—The DMM controls and triggers the SCXI switch using the SH9MD-AUX cable.
  • System D—The DMM triggers the PXI switch using PXI trigger lines. PXI-4060 uses only PXI trigger lines 0 to 6. PXI-4070 uses PXI trigger lines 0 to 7.
  • System E—A PXI or PCI DMM triggers the PXI switch using the AUX trigger cable.

Scanning Capabilities

The following table shows the scanning capabilities for every NI switch. The number after S or H indicates the setup number. For example, if you want to perform a synchronous scan with multiple SCXI-1130 modules using an AUX trigger cable, refer to setup 6. If you want to do handshaking with multiple PXI/PXIe-2529 modules using PXI trigger lines, refer to setup 3. The links in the table direct you to Multiple Module Scanning setups. For single module setups, refer to Single Module Scanning.

Scanning Capabilities for National Instruments Switches

Switches System A
PXI/SCXI Internal Lines
System B
AUX Trigger Cable
System C
SH9MD-AUX Cable
System D
PXI Trigger Lines
System E
AUX Trigger Cable
SCXI-1127
SCXI-1128

S7

S6, H9

S5
SCXI-1129 S7, H*10 S6, H9 S5
SCXI-1130
SCXI-1166
SCXI-1167
SCXI-1193
SCXI-1194
SCXI-1195





S7, H*10





S6, H9





S5, H*8
PXI-2501
PXI-2503
PXI/PXIe-2529
PXI-2530
PXI-2530B
PXI/PXIe-2543
PXI-2566
PXI-2567
PXI/PXIe-2593






S1, H2






S2, H4
PXI-2510
PXI/PXIe-2512
PXI/PXIe-2514
PXI/PXIe-2515
PXI/PXIe-2527
PXI/PXIe-2531
PXI/PXIe-2532
PXI/PXIe-2532B
PXI-2533
PXI-2534
PXI-2535
PXI-2536
PXI-2545
PXI-2546
PXI-2547
PXI-2548
PXI-2549
PXI-2554
PXI-2555
PXI-2556
PXI-2557
PXI-2558
PXI-2559
PXI-2565
PXI-2568
PXI/PXIe-2569
PXI-2570
PXI-2571
PXI/PXIe-2575
PXI-2576
PXI-2584
PXI-2590
PXI-2591
PXI-2594
PXI-2595
PXI-2596
PXI-2597
PXI-2598
PXI-2599
PXI-2720
PXI-2722
PXIe-2725
PXIe-2727
































S1, H2
NI 2810
NI 2811
NI 2812
NI 2813
NI 2814
NI 2815
NI 2816
NI 2817
NI 2833
NI 2834
SCXI-1160
SCXI-1161
SCXI-1163R
SCXI-1190
SCXI-1191
SCXI-1192





Scanning is not supported
where S is synchronous scanning and H is handshaking
H* indicates that handshaking is supported only with an NI 407x

As an alternative to synchronous scanning and handshaking VIs in NI-SWITCH, NI-DMM includes the NI-DMM/Switch Express VI. You can use the NI-DMM/Switch Express VI to configure and acquire a signal using NI-DMM with National Instruments digital multimeters (DMMs) and PXI or SCXI multiplexer switch modules. Refer to the NI Digital Multimeters Help at ni.com/manuals for more information about the NI-DMM/Switch Express VI.

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