NI 6528 - Solid-State Relay Outputs (NI 6528 Only)

NI 6528/6529 User Guide and Specifications 18 ni.com
Solid-State Relay Outputs (NI 6528 Only)
The solid-state relay (SSR) output channels on the NI 6528 device consist
of an LED and two MOSFETs that are connected to form a bi-directional
switch. Depending on how the load is connected to the terminals, an output
can either source or sink current.
Figures 6 and 7 show examples of sinking and sourcing current.
Figure 6. Sinking Current Connection Example
Figure 7. Sourcing Current Connection Example
PX.Y+
PX.Y–
LAA125
Isolated Ground
Supply
+
_
I
F
VCC
Isolation
Digital
Logic
R
S
18 Ω
NI 6528
Load
PX.Y+
PX.Y–
LAA125
Isolated
Ground
Supply
+
_
I
F
VCC
Isolation
Digital
Logic
R
S
18 Ω
NI 6528
Load