AP4300
DC Input, Isolation Signal Conditioner |
TECHNICAL SPECIFICATION ( AP4300)
|
| Input |
Voltage Input: |
|
|
|
Range: |
|
0-10V |
|
Current Input: |
|
|
|
Range: |
|
4-20mA |
| Output |
Voltage Outpot: |
|
|
| Range: |
|
0-10V |
| |
Current Output: |
|
|
| Range: |
|
4-20mA |
| Impedance |
|
|
|
| Input Voltage Impedance |
|
>200K ohms |
| Input Current Impedance |
|
10 ohms, 200mV shunt |
|
Output Voltage Impedance: |
|
<10 ohms |
|
Output Current Impedance: |
|
>100k ohms |
| Accuracy |
|
|
|
|
|
|
+/-.1% of span typical |
|
Response time |
|
|
|
|
|
100 mSec typical |
| Linearity & Stability |
|
|
|
| |
|
|
+/-.05% of span typical |
|
|
|
+/-.025% /
deg C typical |
| Output Drive |
|
|
|
|
Voltage |
|
10mA, max 1k
ohms |
|
Current |
|
15V compliance @ 20mA, 750 ohm
maximum load |
| Common
Mode Rejection |
|
|
| |
DC
to 60Hz: |
|
120dB |
| Isolation |
|
|
600 VDC
or peak AC |
| Temperature Range |
|
|
|
Operating: |
|
0 to
60°C (32 to 140°F) |
|
Storage: |
|
-20 to 85°C (-4 to
185°F) |
| Power |
Consumption: |
|
3W typical,
5W max |
|
Standard: |
|
selectable 120/240VAC,
±10%, 50-60Hz |
|
Optional: |
|
9 to 30VDC,
inverter isolated |
| Agency Approvals |
|
|
CSA
certified per standard C22.2, No. M1982. |
|
Operation
The DC input is amplified and filters
before being fed to a comparator. The comparator, in
conjunction with a precision-ramp generator, outputs a
duty-cycle which in turn drives an optical isolator. The
photo-isolator accurately reproduces the duty-cycle and
provides an isolated signal. The isolated duty-cycle is
then converted back to a DC level proportional to the
input. The DC signal is then buffered by an output stage
which allows zero and span adjustments. In units
having a current output (e.g. 4-20mA) the output is a
constant current source, controlled by the output buffer
stage. With voltage output units (e.g. 0-10V) the output is
taken directly from the discrete driver transistor of the
buffer stage. The internal power supplies for the input and
output circuitry use independent transformer secondaries to
maintain isolation.
|
|
Calibration
Top-accessed
screwdriver adjustments provide typical +/- 10% zero and
span adjustability. Calibration is referred to input in
that adjustments are to correct for input/sensor
variations. Zero is adjusted for the specified minimum
output with the input at the desired minimum. Span is
adjusted for the specified maximum . Repeat adjustments for
maximum accuracy. |
|
