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Getting Started
3.4.6. CONNECTING THE CONTROL INPUTS
CONTROL IN
A
B
C
D
Local Power Connections
Input #
Status Definition
REMOTE ZERO CAL
A
B
REMOTE SPAN CAL
C, D, E & F
SPARE
Digital Ground
U
External Power input
+
5 VDC output
48
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.
+
E
F
U
Figure 3-10:
Table 3-8: Control Input Signals
ON Condition
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
span (midpoint) calibration. The mode field of the display will read LO CAL
R.
The ground level from the analyzer's internal DC power supplies (same as
chassis ground)
Input pin for +5 VDC is required to activate pins A – F.
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 ML - T100 UV Fluorescence SO2 Analyzer
A
B
C
-
External Power Connections
Control Input Connector
CONTROL IN
+
D
E
F
U
5 VDC Power
Supply
+
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