Teledyne T100, Instruction Manual, Page: 48 / 404

Getting Started
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
48
3.4.6. 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
+
S
PA
N
C
A
L
Z
E
R
O
C
A
L
CONTROL IN
A B C D E F U
+
S
PA
N
C
A
L
Z
E
R
O
C
A
L
-
+
5 VDC Power
Supply
Local Power Connections
External Power Connections
Figure 3-10: Control Input Connector
Table 3-8: 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 .
B REMOTE SPAN CAL
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 .
C, D, E & F SPARE
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 is 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).