Q408
DC Input Field Configurable Isolator |
TECHNICAL SPECIFICATION (Q408)
|
| Input |
Voltage
Input |
|
|
|
Range Limits: |
|
10mV to 100V ( see Table 1) |
|
Impedance: |
|
>100KW |
|
Overvoltage: |
|
200V
continuous |
| Current Input |
Range
Limits: |
|
1mA to 100mA |
|
Impedance: |
|
20W typical |
|
Overcurrent: |
|
170mA , protectedby self
resetting fuse |
|
Overvoltage: |
|
60V |
| Push-button Adjustment (inputs>10mV) |
|
|
|
Effective zero offset: |
|
>
90% |
|
Effective span turn down: |
|
> 90% except for
20mV/2mA range where 50% is maximum zero offset and span turndown |
| Output |
Voltage Output |
|
|
|
Output: |
|
0-5V, 0-10V |
|
Source Impedance: |
|
<10W |
|
Drive: |
|
10mA max. |
| Current Output |
Output: |
|
4-20mA,
0-1mA (and 0-20mA on single output channel versions only) |
|
Source Impedance: |
|
>100KW |
| Compliance: |
0-1mA: |
|
7.5V max.
(7.5KW) |
|
4-20mA: |
|
12V max. (600W) |
|
0-20mA: |
|
12V max.
(600W) |
|
|
|
10V max. (500W) on dual output versions |
| LED
Indication |
RUN (green): |
|
on when unit
is powered, flashes at 2Hz when input is 7% below minimum, flashes at 8Hz when
input is 7% above maximum. |
|
INPUT
(yellow): |
|
on while calibrating the input
level |
|
OUTPUT (red): |
|
on while
calibrating the output level |
| Output Accuracy |
|
> 2mA / > 20mV input
spans: |
|
|
|
+0.1%
of full-scale input typical, +0.2% maximum < 2mA / <20mV input
spans: + 0.35% of fullscale input typical, + 0.5% maxmum;
including linearity, repeatability and hysteresis @23C. |
| Output Ripple |
|
|
<50% offset or span
adjust:<0.1% off full scale span or 25mV RMS, whichever is greater >50%
offset or span adjust:<0.2% of full scale span or 50mV RMS, whichever is
greater. |
| Response
Time |
|
|
200mSec,
typical |
| Stability |
|
|
+0.025% of full scale
/C, maximum for fullscale and zero |
| Excitation Voltage (optional) |
|
24VDC, 20mA
maximum |
| CMRR |
|
|
120dB at DC, >90dB at
60Hz |
| Isolation |
|
|
>
1800VDC or peak AC between input, output, power and channel to channel |
| ESD Susceptibility |
|
Capable of meeting IEC 801-2
level 3(8kV) |
| Humidity (non-condensing) |
|
|
|
Operating: |
|
15 to 95% RH(@45°C) |
|
Soak: |
|
90% RH for
24 hours(@60°C) |
| Temperature |
Operating: |
|
0 to 55°C (32 to
131°F) |
|
Storage: |
|
-25 to
70°C (-13 to 158°F) |
| Power |
|
|
2.5W max; 9-30VDC |
| Wire
Terminal |
|
|
Socketed
screw terminals for 12-22 AWG |
| Agency Approvals |
|
CSA certified per standard
C22,2 (File No LR 42272). |
|
|
|
UL
recognized per standard UL508 (File No. E99775). |
|
|
|
CE Mark pending. |
|
Diagnostic LEDs
The
Q408 has three diagnostic LEDs. One green LED, labeled RUN, is used for
diagnostics to indicate that power is on, and it will flash quickly if the
input signal is above the configured range or slowly if the input signal is
below range. The RUN LED is continuously on when the unit is functioning within
the configured range.
The yellow IN LED is on while calibrating the input and the
red OUT LED is on while calibrating the output.
Configuration
A major
advantage of the Q408 is its wide ranging capabilities and ease of
configuration. The Q408 can be configured for input ranges from 10mV to 100V or
1mA to 100mA, with >90% input offset or it will adjust down to <10% of
full scale input span (except on 20mV/2mA range where maximum offset or gain
adjustment is 50%).
Unless a specific custom calibration is specified, the
factory presets the Model Q408 as follows:
| Input Range: |
20mA (Current on) |
| Input Configuration: |
Unipolar |
| Calibrated Input: |
4-20mA |
| Operation: |
Direct (Reverse off) |
| Calibrated Output: |
4-20mA |
Regarding other I/O ranges, refer to Table 1 for input range
(SW1) switch settings, Table 2 for input function settings and Table 3 for
output ranges (SW2). Refer to Table 4 to configure the multi-channel modules.
For quick and easy calibration mode reference, see the step-by-step flow chart
in Figure 2. |
|
- With power off, snap off the face plate by lifting the
right edge, away from the heat sink. Then, slide the heat sink forward and off
the module.
- The single channel module has two eight position switch
blocks, one for input and one for output.
- The dual output modules have a patio board behind the
heat sink. Gently lift this board away from the main board, rocking it back
while lifting. This module has two ten position switch blocks, one for each
channel.
- For single channel modules, choose the desired input,
function and output range from Table 1, 2, and 3. For multi-channel modules,
use Table 4. Set the dip switches for the desired I/O.
|
|
|
Calibration
For best
results, calibration should be performed in the operating installation,
allowing at least one hour for thermal stability of the system. If
precalibration on a test bench is preferred, then an output load equal to the
input impedance of the device(s) connected to the Q408 output is recommended,
along with a 1 hour warm up period.
- For best results install the module on to a piece of DIN
rail or the I/Q Rail mounting accessories if desired. See the I/Q Rail Data
sheet for details.
- Connect the input to a calibrated DC source and the
output to a voltage or current meter. Apply power and allow the system to reach
thermal equilibrium (approx.1 hour ).
- Adjust the input signal to the desired maximum and
observe that the green LED is on or flashing. Push the CAL button and hold it
down for more than 5 seconds, until the yellow and Green LEDs are
flashing.
- When the yellow and green LEDs stop flashing, the yellow
and red LEDs should be on. Push the CAL button momentarily, the yellow and
green LEDs should now be on.
- Apply the exact maximuminput signal level desired, if not
already applied, then push the CAL button to store. The yellow LED should now
be on.
- Apply the exact minimum input signal level desired, then
push the CAL button to store. The green and red LED should now be on.
- Adjust the input signal up, until the output is precisely
at the desired maximum level (e.g. 20.00mA), then push the CAL button to store.
The red LED should be on.
- Adjust the input signal level down, until the output is
precisely at the desired minimum level (e.g. 4.00mA), then push the CAL button
to store. The yellow, green and red LEDs should now be on.
- To finish calibration, push the CAL button one final
time. The green LED should be on if the input is within the calibrated
range.
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