National Instruments 1128 用户手册
Chapter 2
Using the SCXI-1127/1128
2-16
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module. You can bus the VMC onto the SCXI backplane (Trig 0), allowing
other modules to be triggered as shown in Figure 2-14. You must
daisy-chain the SCANADVD trigger from one module to another.
other modules to be triggered as shown in Figure 2-14. You must
daisy-chain the SCANADVD trigger from one module to another.
Figure 2-14. Daisy-Chained for Handshaking
If you are using an SCXI-2000 chassis, you can bus the SCANADVD
signal over the SCXI backplane (Trig 2). This eliminates the need to
physically connect the SCANADVD trigger from one SCXI-1127/1128
module to another. This configuration is shown in Figure 2-15. Refer to
your SCXI chassis manual to check the Trig 2 specifications.
signal over the SCXI backplane (Trig 2). This eliminates the need to
physically connect the SCANADVD trigger from one SCXI-1127/1128
module to another. This configuration is shown in Figure 2-15. Refer to
your SCXI chassis manual to check the Trig 2 specifications.
Figure 2-15. Connecting an External DMM to an SCXI-1127/1128
in an SCXI-2000 Series Chassis
Trig 0 (Backplane)
Cabled
SCXI-1127/1128
EXT_TRIG_IN
From DMM VMC
SCXI-1127/1128
SCXI-1127/1128
SCANADVD
To DMM
Backplane
Connector
Connector
Digital
Communication
Connector
HVAB
Connector
Connector
Trig 0 (Backplane)
Cabled
SCXI-1127/1128
EXT_TRIG_IN
From DMM VMC
SCANADVD
to DMM
SCXI Module
SCXI Module
Trig 2 (Backplane)