3 input/output specification, Input/output pin designations – Campbell Scientific 0871LH1 Freezing Rain Sensor User Manual
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3 Input/Output Specification
3
3.1
Input/Output Pin Designations
Table 10. Input/Output Pin Designations
Signal Name
Connector
Pin
Input or
Output
Definition
Current
Wire
Gauge
24VDC A
Input 18-29.5
VDC**
1.5 Amp Max at
28VDC
20
24VDC Return
B
Input
----
----
20
Case Ground
C
Input
----
----
20
RS-422 High
D
Output
Per RS-422 Spec
Per RS-422 Spec
20-24
RS-422 Low
E
Output
Per RS-422 Spec Per
RS-422
Spec
20-24
Ice
F
Output
Ground Active (1.5V Max)
0.5 - 50 mA
20-24
Open
Inactive
Status G
Output
Ground
Inactive
(1.5V Max)
0.5 - 50 mA
20-24
Open
Active
**Ice will be correctly detected between these voltages. Proper probe de-icing, however, is only
guaranteed when input voltage is 24VDC or greater.
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