Teledyne gfc 7000ta operation manual Connecting the Control Inputs, Control Input Pin-outs

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.5.5. Connecting the Control Inputs

If you wish to use the analyzer to remotely activate the zero and span calibration modes, several digital control inputs are provided through a 10-pin connector labeled CONTROL IN on the analyzer’s rear panel.

There are two methods for energizing the control inputs. The internal +5V available from the pin labeled “+” is the most convenient method. However, if full isolation is required, an external 5 VDC power supply should be used.

CONTROL IN

A B C D E F U +

ZS E P R A O N

Local Power Connections

CONTROL IN

A B C D E F U +

ZS E P R A O N

-	5 VDC Power	+
	Supply

External Power Connections

The pin assignments for the digital control inputs can be found in the table below:

Table 3-6: Control Input Pin-outs

INPUT #	STATUS	ON CONDITION
	DEFINITION
A	REMOTE ZERO	The Analyzer is placed in Zero Calibration mode. The mode field of
	CAL	the display will read ZERO CAL R.
B	REMOTE	The Analyzer is placed in Span Calibration mode. The mode field of
	SPAN CAL	the display will read SPAN CAL R.

CSPARE

DSPARE

ESPARE

FSPARE

	Digital Ground	May be connected to the ground of the data logger/recorder.
U	Pull-up supply for	Input pin for +5 VDC required to activate pins A – F. This can be from
		an external source or from the “+” pin of the instruments STATUS
	inputs
		connector.

+Internal +5V Internal source of +5V which can be used to actuate control inputs

Supply when connected to the U pin.

Teledyne Analytical Instruments 24