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Field Configurable Limit Alarm Modules
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Models Available for
Thermocouples, RTDs,
DC and AC Voltage and
Current
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Easy Field Configurable
Ranges
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Adjustable Setpoints
Programmable HI or LO
and Failsafe or
Non-Failsafe
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View related products - Signal Conditioners
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The DRG-AR Series modules are a family of DIN rail mount limit alarms
with dual setpoints and two contact closure outputs. The field
configurable input and alarm functions offer flexible setpoint
capability. Modules are available for a variety of input types including
thermocouples, RTDs, DC and AC current and voltages.
Each module can be set to a number of input ranges via an input
selector switch. The alarm points and dead band are adjusted by
potentiometers.
Diagnostic LEDs
All modules are equipped with 3 front panel LEDs. The first is a
dual function LED labeled input. This green LED indicates line power
and input signal status. Two red LEDs indicate the relay state for
each setpoint. An illuminated red LED indicates the tripped condition.
Output
The DRG-AR Series modules are equipped with two SPDT relays,
rated at 120 Vac or 28 Vdc at 5 amperes. Each of these relays is
independently controlled by the field configurable setpoint and deadband.
Operation
The field configurable limit alarm setpoints can be configured for HI or
LO, failsafe or non-failsafe operation. Each of the setpoints has
a respective HI or LO deadband. In a tripped condition, the setpoint is
exceeded and the appropriate red LED will illuminate. The trip will
reset only when the process falls below the HI deadband or rises
above the low deadband. In failsafe operation, the relay is energized
when the process is below the HI setpoint or above the LO setpoint
(opposite for non-fail-safe). In the fail-safe mode, a power failure
results in an alarm state output.
Dynamic DeadBand
LSI circuitry in the DRG-AR Series prevents false trips by repeatedly
sampling the input. The input must remain beyond the setpoint for
100 milliseconds to qualify as a valid trip condition. Likewise, the
input must fall outside the deadband and remain there for
100 milliseconds to return the alarm to an untripped condition. This,
effectively, results in a dynamic deadband.
DRG-AR-AC AC Voltage or Current Input Limit Alarm
The DRG-AR-AC is a DIN rail mount, AC voltage or AC current input limit alarm with dual setpoints
and two contact closure outputs. Input voltage spans from 100 mVac to 200 Vac and input
current spans from 10 mAAC to 100 mAAC can be field configured. For current spans of 1 to 5
Amps a 0.1. (5 W) shunt resistor (Model# DRG-C006) is available.
Specifications
Input Ranges
Voltage: 100 mVAC, 200 mVac, 500 mVac, 1 Vac, 2 Vac, 5 Vac, 10 Vac, 20 Vac, 50 Vac, 100 Vac, 200 Vac
Current: 10 mAAC, 20 mAAC, 50 mAAC, 100 mAAC
DRG-AR-RTD Input Limit Alarm
The DRG-AR-RTD is a DIN rail mount, RTD input limit alarm with dual setpoints and two contact closure
outputs. The module features up to 8 temperature ranges for each RTD type.
Input Ranges
| RTD Type | Temperature Ranges (°C) |
| Pt100, 500, 1000 | 0 to 50, -50 to 50, 0 to 100, -100 to 100, (a = 0.00385), 0 to 250, -200 to 250, 0 to 550, 0 to 850 |
| Cu10 | 25 to 70, -30 to 70, 25 to 120, -70 to 120, 25 to 260, -200 to 260 |
| Cu100 | 25 to 75, -25 to 75, 25 to 150, -100 to 150, 25 to 260, -200 to 260 |
| Ni120 | -30 to 30, -80 to 30, -30 to 100, -30 to 200, -30 to 320 |
| NiFe604 | -40 to 0, -40 to 50, -200 to 50, -200 to 100, -200 to 240 |
DRG-AR-TC Thermocouple Input Limit Alarm
The DRG-AR-TC is a DIN rail mount, thermocouple
input limit alarm with dual setpoints and two contact
closure outputs. The module features up to six
temperature ranges for each thermocouple type to
ensure accuracy and maximize setpoint resolution. A
bipolar switch is provided for temperature ranges below
0°C. The DRG-AR-TC is configurable as a single or
dual setpoint alarm, with HI or LO trips, upscale or
downscale burnout detection and failsafe or
non-failsafe operation.
Input Ranges
| T/C | Temperature Ranges (°C) |
| B | 0 to1490, 0 to 1820 |
| E | 0 to 150, 0 to 290, 0 to 660, 0 to 1000, -270 to 150, -270 to 290 |
| J | 0 to 190, 0 to 350, 0 to 760, -210 to 190, -210 to 350 |
| K | 0 to 250, 0 to 480, 0 to 1280, 0 to 1372, -270 to 250, -270 to 480 |
| R | 0 to 970, 0 to 1690, 0 to 1760 |
| S | 0 to 1050, 0 to 1750 |
| T | 0 to 210, 0 to 390, -270 to 210, -270 to 390 |
DRG-AR-DC DC Voltage and Current Input Limit Alarm
The DRG-AR-DC is a DIN rail mount, DC voltage and
DC current input limit alarm with dual setpoints and two
contact closure outputs. Input voltage spans from 10
mV to 200 V and input current spans from 1 mA to
100 mA can be field configured. Bipolar inputs are also
accepted. The module also features 24 Vdc voltage
source (isolated from line power) for transducer
excitation.
Specifications
Input Ranges (Unipolar & Bipolar)
Voltage: 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV, 1 V,2 V, 5 V, 10 V, 20 V, 50 V, 100 V, 200 V
Current: 1 mA, 2 mA, 5 mA, 10 mA, 20 mA, 50 mA, 100 mA
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† All dollar amounts on this site are shown in US currency.
Note: Each DRG-AR Series limit alarm module is supplied with a complete operator's manual.
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| Related Links -
Manual, Related Products
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| Product Manual |
| Download DRG-AR-TC - TC input limit alarm |
| Download DRG-AR-RTD - RTD input limit alarm |
| Download DRG-AR-DC - DC input limit alarm |
| Download DRG-AR-AC - AC input limit alarm |
| Related Products |
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DRG-SC Series: |
| DIN rail mount frequency input signal conditioning module |
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