Flow Meter FC01-LQ

8.6 Sensor interface

8.6.1 Electrical data of the terminal for calorimetric monitoring heads

Terminal

Mnemonics

Data

 

 

 

XSK1

R(HEIZ)-LO

Function: terminal for negative pole of heater element

 

 

Drain output of heating current control

 

 

Max. sink current: Isink = 88 mA

 

 

Dielectric strength: -0.5 V … +20 V DC

 

 

 

XSK2

R(HEIZ)-HI

Function: terminal for positive pole of heater element

 

 

Hi-potential of heater source

 

 

Output voltage range (load dependent)

 

 

Ua = 21 V … 24 V DC

 

 

Max. current output: Imax = 100 mA

 

 

Not short-circuit proof

 

 

 

XSK3

R(Tref)-HI

Function: terminal for positive RTD * pole for medium

 

 

temperature measurement

 

 

Input resistance: > 1 GΩ

 

 

Dielectric strength: -17 V … +30 V DC

 

 

 

XSK4

R(Tref)-LO

Function: terminal for negative RTD * pole for medium

 

 

temperature measurement

 

 

Input resistance: > 1 GΩ

 

 

Dielectric strength: -17 V … +30 V DC

 

 

 

XSK5

AGND

Function: analogue ground

 

 

Reference potential of exitation current source for

 

 

RTD * operation

 

 

 

XSK6

IS

Function: output of exitation current source for

 

 

RTD * operation

 

 

Exitation current: 1 mA ± 1%

 

 

Admissible load range: Rload = 0 … 2 k

 

 

Dielectric strength: ±15 V DC

 

 

 

XSK7

SGND

Function: shield ground

XSK8

 

Terminals for sensor cable shielding

 

 

 

XSK9

R(Tdiff)-LO

Function: terminal for negative pole of the heated RTD *

 

 

Input resistance: > 1 GΩ

 

 

Dielectric strength: -17 V … +30 V DC

 

 

 

XSK10

R(Tdiff)-HI

Function: terminal for positive pole of the heated RTD *

 

 

Input resistance: > 1 GΩ

 

 

Dielectric strength: -17 V … +30 V DC

 

 

 

* RTD = Resistive Temperature Device

56

Technical data

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ETA Systems manual Flow Meter FC01-LQ Sensor interface

FC01-LQ specifications

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