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Teledyne API - Model 200EH/EM Operation Manual Getting Started
13
3.1.2.4. 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.
SPAN CAL
ZERO CAL
LOW SPAN
CONTROL IN
Local Power Connections
External Power Connections
SPAN CAL
ZERO CAL
LOW SPAN
CONTROL IN
-
+
5 VDC Power
Supply
A B C D E F U +
A B C D E F U +
Figure 3-6: 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 Span Calibration mode. The mode field of
the display will read
SPAN CAL R.
C REMOTE LO 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.
D REMOTE RANGE HI
The analyzer is placed into high range when configured for dual
ranges..
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).
04521C (DCN5731)