Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 33)

Model 9110EH Instruction Manual Getting Started
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.
SPAN C
A
L
ZERO CA
L
CONTROL IN
Local Power Connections External Power Connections
SPAN C
A
L
ZERO CA
L
CONTROL IN
- +
5 VDC Power
Supply
A B C D E F U + A B C D E F U +
Figure 3-9: Control Input Connector
Table 3-4: 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 low span calibration mode as part
of performing a low span (midpoint) calibration. The mode
field of the display will read LO CAL R.
C SPARE
D SPARE
E SPARE
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 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).
If you wish to utilize one of the analyzer’s two serial ports, attach the serial cable that is
included with the analyzer to the COM1 serial port on the rear panel. Connect the other end
to a serial port on your computer and set the computer serial port to 115000 baud transfer
M9110EH Rev 0 19