Teledyne GFC 7001E Connecting the Control Inputs, Control Input Connector Control Input Signals

Getting Started Model GFC7001E Carbon Dioxide Analyzer

3.3.4.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 CONTROL IN

A B C D E F

ZERO	SPAN	RANGE
	LOW	HIGH
		CAL

U +		A B	C D E F
	ZERO	SPAN	RANGE
		LOW	HIGH
			CAL

U+

-

5 VDC Power

Supply

+

	Local Power Connections		External Power Connections
	Figure 3-9:		Control Input Connector
	Table 3-6: Control Input Signals
INPUT #	STATUS DEFINITION		ON CONDITION
A	REMOTE ZERO CAL	The analyzer is placed in Zero Calibration mode. The mode field of the
		display will read ZERO CAL R.
		The analyzer is placed in span calibration mode as part of performing a low
B	REMOTE SPAN CAL	span (midpoint) calibration. The mode field of the display will read LO CAL
		R.
	REMOTE CAL HIGH	The analyzer is forced into high range for zero or span calibrations. This
C		only applies when the range mode is either DUAL or AUTO. The mode field
	RANGE
		of the display will read HI CAL R.
D, E	SPARE
& F
	Digital Ground	The ground level from the analyzer’s internal DC power supplies (same as
		chassis ground).
U	External Power input	Input pin for +5 VDC required to activate pins A – F.
	5 VDC output	Internally generated 5V DC power. To activate inputs A – F, place a jumper
+		between this pin and the “U” pin. The maximum amperage through this port
		is 300 mA (combined with the analog output supply, if used).
	Teledyne Analytical Instruments			41