Campbell-scientific 0871LH1 Freezing Rain Sensor Manual do Utilizador descarregar pdf (Página 7)

4 Specifications

Power Supply

Operating Voltage: 18 – 29.5 VDC

Power Draw: 5W max at 24 VDC (sensing mode)

27W max at 24 VDC (deicing mode)

Temperature

Operating: -55°C to +71°C

Storage: -65°C to +90°C

Communication Outputs

Discrete Outputs: for Icing and Status

No Icing – Open, Icing – Ground

Status OK – Ground, Status Failure – Open

RS-422: Hexidecimal 24-byte string (ASCII format)

9600 Baud (1 Start Bit, 8 Data Bits, No Parity, 1

Stop Bit)

RS422 Outputs: for Icing and Status

No Icing – 0, Icing – 1

Status OK – 0, Status Failure – 1

Icing Signal Period: 60 second activation from start of icing

measurement (Discrete or RS-422 outputs)

Connector Pinout

Table 1. 0871LH1 Connector Pinout

Connector Pin Signal Description

A 24VDC

B 24VDC Return

C Case Ground

D RS-422 High

E RS-422 Low

F Ice

G Status

Mating Connector: MS27473T10B99SN

De-icing Control Automatically triggered with accumulation of

0.5mm of ice on probe

Max heating time – 25 seconds

1 2 3 4 5 6 7 8 9 10 11 12 ... 30 31

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Campbell-scientific 0871LH1 Freezing Rain Sensor Manual do Utilizador Página 7