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FP-CTR-502 and cFP-CTR-502 6 ni.com
V
IN
is 21 V or lower, and an OFF state when V
IN
is 22 V or higher.
The channel state is indeterminate when V
IN
is between 21 V
and22V.
Ensure that the sinking-output devices have OFF state leakage
currents of less than 0.3 mA so they do not send false ON state
readings to the [c]FP-CTR-502.
Note You must use the same ground for all of the input
and output channels on the [c]FP-CTR-502.
Figure 3. Wiring a Count-Input or Gate-Input Channel to a
Sinking-Output Device
Outputs
Each output channel has one output terminal, V
OUT
. Each channel
also has V
SUP
and COM terminals that can supply power to field
devices.
The [c]FP-CTR-502 has sinking outputs, which means that V
OUT
provides a path to ground. You can connect the [c]FP-CTR-502
outputs to sourcing-input devices.
In the ON state, a transistor is turned on between the output (V
OUT
)
and common (C and COM). In the OFF state, this transistor is
turned off, allowing only a small leakage current to flow. Ensure
that the load on any output channel does not draw more than 1 A.
VC
V
SUP
V
IN
COM
To next channel
[c]FP-CTR-502
Sinking-
Output
Device
Sourcing-
Input
Circuitry
+–
5–30 VDC
External
Power
Supply
2 A max