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DIN Rail Signal Conditioner | AC Powered AC Input
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The DRI-AC is a DIN rail mount, AC input
signal conditioner with 1800 Vdc isolation
between input, output and power. The
field configurable input and output offers
flexible, wide ranging capability for scaling,
converting or buffering AC inputs ranging
from 5 mA to 100 mA AC or 50 mV to 300 Vac.
For current inputs above 100 mA, it is
recommended that an input shunt resistor be used
and the DRI-AC be configured for the proper input
range. For example, a 5A current transformer output
can use a 0.1 O, 5 W shunt resistor with the input of the
DRI-AC set for 0 to 500 mV AC.
The DC output of the DRI-AC is proportional to the
average of the fully-rectified AC input signal, and is
calibrated for sine waves between 40 to 400 Hz.
The DRI-AC utilizes Touch Calibration technology which
greatly simplifies calibration. The thermal drift and
mechanical variability of the potentiometers has been
removed and replaced with a digitally stable circuit.
Once the unit is configured via DIP switches for voltage
or current, the pushbutton is used to precisely calibrate
the minimum and maximum levels.
To set the input level within the dip switch configured
range, simply apply the high input signal (voltage or
current) and push the CAL button. The low input signal
is then applied and pushing the CAL button again
stores the low input signal. The high and low input
levels are stored in nonvolatile memory and correspond
to the high and low output levels. These output levels
are precisely adjusted using the input signal.
Touch Calibration technology enables precise
calibration and provides more than 90% offset of the
zero value and adjustment down to 10% of the full scale
input span for most of the 16 switch selectable input
ranges. For example, the dip-switch configured 0 to 200V
input range could be calibrated via pushbutton for 0 to
80V (i.e. 60% span reduction) or offset to a range of
120 to 200V (i.e. 60% offset and 60% span reduction).
If the output was configured for 0 to 10V, then 120 to
200V input would correspond to the 0 to 10V full scale
output. Input ranges such as 180 to 200V or 0 to 20V
are possible using the 0 to 200V range.
Advanced digital technology combined with ASIC
technology allows the DRI-AC to be field configured
for virtually any AC input to DC output within the limits
specified.
The output of the DRI-AC can drive a digital meter for
direct display or can interface with alarm or control
devices including PLCs and computers.
The DRI-AC has three diagnostic LEDs. The green
(RUN) LED is used for diagnostics to indicate that power
is on. It will flash quickly if the input signal is above the
calibrated range or slowly if the input signal is below
range. It is on continuously when the unit is functioning
within the calibrated range. The yellow (INPUT) LED is
on while calibrating the input level. The red (OUTPUT)
LED is on while calibrating the output level.
The DRI-AC can be configured for input ranges from
50 mV to 300V or 5 mA to 100 mA, with >90% input
offset or it will adjust down to <10% of full scale input
span (except on the 100 mV/10 mA range in which
maximum offset or gain adjustment is 50%).
The factory default configuration for the DRI-AC is as follows:
Input Range: 0 to 500 mV
Calibrated Output: 4 to 20 mA
Specifications
INPUT
AC Voltage:
Ranges: 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V, 20 V,
50 V, 100 V, 200 V, 300 V (dip-switch selectable)
Impedance: >100 kΩ
Overvoltage: 330 Vac
AC Current:
Ranges: 10 mA, 20 mA, 50 mA, 100 mA (dip-switch selectable)
Impedance: 20 Ω, typical
Overcurrent: 170 mA AC
Overvoltage: 60 V peak
Frequency Range: 40 to 400 Hz, factory calibrated at 60 Hz
Common Mode (Input to Ground): 1800 Vdc max
Pushbutton Adjustment: Max zero offset and span turn down is 50%
OUTPUT
Voltage Output:
Range: 0 to 5V, 0 to 10V (dip-switch selectable)
Source Impedance: <10 Ω
Drive: 10 mA max (1 kΩ min @ 10V)
Current Output:
Range: 0 to 1 mA, 0 to 20 mA, 4 to 20 mA (dip-switch selectable)
Source Impedance: >100 kΩ
Compliance:
0 to 1 mA: 7.5V max (7.5 kΩ max)
0 to 20 mA: 12V max (600 Ω max)
4 to 20 mA: 12V max (600 Ω max)
LED Indication:
RUN (Green): On when unit is powered; flashes at 8 Hz when input is 7% above max
INPUT (Yellow): On while calibrating the input level
OUTPUT (Red): On while calibrating the output level
Accuracy (Including Linearity & Hysteresis): ±0.1% of span typical, ±0.2% max; ±0.5% of span max (100 mV range)
Temperature Stability: ±0.025%/°C of selected input span, typical
Response Time (10 to 90%): 250 msec, typical
Common Mode Rejection (DC to 60 Hz): 90 dB
Isolation: 1800 Vdc between input, output and power
Operating Temperature: 0 to 55°C (32 to 131°F)
Storage Temperature: -25 to 70°C (-13 to 158°F)
Humidity (Non-Condensing):
Operating: 15 to 95% RH @ 45°C (113°F)
Soak: 90% RH for 24 hours @ 65°C (149°F)
Power: 100 to 240 Vac ±10%, 50 to 400 Hz; 1.5 W typical, 2.5 W max
Wire Terminations: Screw terminals for 12 to 22 AWG wire
Weight: 218 g (0.48 lb)
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† All dollar amounts on this site are shown in US currency.
Note: An ACPB power rail is required to power the modules and is ordered separately.
Ordering Example: (1) ACPB-2 AC power distribution bus for 2 modules, USD$1,790.00,
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