ETA Systems manual Flow Meter FC01-LQ Sensor interface

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