4
POWER AND OUTPUT CONNECTIONS
Power
Primary power is connected to terminals 2 and 3 (labeled VDC- and VDC+).
For best results, the Power should be relatively “clean” and within the specified
variation limits. Drawing power from heavily loaded circuits or from circuits
that also power loads that cycle on and off, should be avoided.
Current Output
Wiring for a current output is connected to terminals 1 (I
OUT
-) and 4 (I
OUT
+
).
DIP switch S2 should be set for the desired full scale output current. (20 mA =
ON; 1 mA = OFF).
Voltage Output
Wiring for a voltage output is connected to terminals 5 (V
OUT
-) and 6
(V
OUT
+
).
Note:
Although signals are present at voltage and current outputs at the same
time, only the selected range is in calibration at any one time.
Example: A 0 to 10 VDC output is selected. The voltage level present at the
voltage output terminals is in calibration, but the signal appearing at the
current output terminals does not conform to any of the current output
ranges.
INPUT CONNECTIONS
Current Input
Wiring for a current input is connected
to terminals 10 (I
IN
) and 12 (INPUT
COMMON).
Voltage Input
Wiring for a voltage input is connected
to terminal 12 (INPUT COMMON) and
one of the three available voltage
terminals listed below, depending on
maximum input voltage.
Terminal 7: 1 VDC max.
Terminal 8: 10 VDC max.
Terminal 9: 100 VDC max.
1.1 Remove power.
1.2 Connect signal wires to the correct input terminals based on the maximum signal
input.
Terminal 7: max. signal input 1 VDC
Terminal 8: max. signal input 10 VDC
Terminal 9: max. signal input 100 VDC
Terminal 10: max. signal input 100 mA
Terminal 12: signal common
1.3 Set Input Range switches (S1 switches 6 through 10) to the desired Input Range
(See Table 3). (0 to 10 VDC range shown).
1.4 Set Input Field/Fact. switch (S1 switch 2) to the off position.
1.5 Apply power to the IAMA.
Solid illumination of Green LED if signal is within the minimum and maximum
limits of the selected input range.
Slow blinking of Red LED if signal decreases below minimum limit of selected
input range.
Rapid blinking of Red LED if signal increases above maximum limit of selected
input range.
1.6 Input set-up complete. Go to Step 3.0 or Step 4.0.
1.0 INPUT SET-UP USING
FACTORY
CONFIGURATION
SCALING PROCEDURE
The accuracy of the IAMA is dependent on the accuracy of the calibration source and the voltage
or current meter used in the scaling process.
If an out of range (see Table 1 for LED indications) or illegal (full scale less than minimum scale)
scaling is attempted, the factory calibration values will be stored in place of the field values. This will
prohibit erroneous operation of the IAMA. The scaling procedure will have to be repeated.
The final storage of the zero and full scale values to E
2
prom is not done until the last transition of
the mode/calibration DIP switches (S1-1 or S1-2). Therefore, the scaling can be aborted any time
before the full scale value is saved. This is accomplished by cycling power to the IAMA. The IAMA
will restore the factory or previous field scaling values at power up depending on the setting of the
DIP switches. See Mode Selection for more detailed instructions for selecting factory and field modes
at power up. See Table 2 and 3 for the input and output range DIP switch settings.
Step 1.3
Step 1.4
