Omega DRG-AR-DC Instruction Sheet

Inputs
>50mV/5mA: 0.1% of full scale
Voltage Input
<50mV/5mA: 0.2% of full scale
Range: 10mV to +200V
Stability
Impedance: >100KΩ
Temperature: +0.05% of full
Overvoltage: 200V rms, max.
scale/°C, max.
Current Input
Excitation Voltage
Range: 1mA to +100mA
24VDC, 20mA, maximum
Impedance: 20Ω, typical
Common Mode Rejection
Overcurrent: 170mA rms, max.
DC to 60Hz: 120dB
Overvoltage: 60VDC
Isolation
(protected by self resetting fuse)
1800VDC between contacts, input
Common Mode (Input to Ground):
and power
1800VDC, max.
EMC Compliance (CE Mark)
LED Indicators
Emmissions: EN50081-1
Input Range (Green)
Immunity: EN50082-2
>110% input: 8Hz flash
Safety: EN50178
<0% input: 4Hz flash
Humidity (Non-Condensing)
Setpoint (Red)
Operating: 15 to 95% (@45°C)
Tripped: Solid red
Soak: 90% for 24hours (@65°C)
Safe: Off
Temperature Range
Limit Differentials (Deadbands)
Operating: 0 to 55°C (32 to 131°F)
>50mV/5mA: 0.25% to 5% of span
Storage: -25 to 70°C (-13 to 158°F)
<50mV/5mA: 1% to 5% of span
Power
Response Time
Consumption: 1.5W typical,
Dynamic Deadband: Relay status
2.5W max.
will change when proper
Supply Range: 9 to 30VDC,
setpoint/process condition exists
inverter isolated
for 100msec.
In-rush Current: 300mA, max.
Normal Mode (analog filtering):
Relay Contacts
<250mSec, (10-90%)
2 SPDT (2 form C) Relays
Setpoints
1 Relay per setpoint
Effectivity: Setpoints are adjustable
Current Rating (resistive)
over 100% of the selected input
span.
Repeatability (constant temp.):
OMEGA ENGINEERING, INC. warrants this unit to be free of manufacturing defects for the life of the product.
If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA's Customer Service Department will issue an Authorized Return
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ã Copyright 1996 OMEGA ENGINEERING, INC. All rights reserved. This documentation may not be copied, photocopied, reproduced, translated, or reduced to any
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120VAC: 5A
240VAC: 2A
28VDC: 5A
Material: Silver-Cadmium Oxide
5
Electrical Life:10 operations
at rated load
Note: External relay contact
protection is required for use
with inductive loads (see
Figures 2 & 3).
Mechanical Life: 10 7 operations
Wire Terminations
Screw terminations for 12-22 AWG
Agency Approvals
CSA certified per standard C22.2, No.
0-M91 and 142-M198
No.LR42272) UL recognized per stan-
dard per standard UL508 (File
No.E99775). CE conformance per
1 EMC directive 89/336/EEC and Low
Voltage 73/23/EEC (Input<75VDC,
only).
Mounting
32mm and 35mm DIN Rail
PIN CONNECTIONS
11 N.O. Relay B
12 Com. Relay B
13 N.C. Relay B
21 DC Power (+)
22 DC Power (-)
23 No Connection
41 Analog Input (+)
42 Analog Input (-)
43 (+) 24VDC Excitation
WARRANTY/DISCLAIMER
contract, warranty, negligence, indemnification, strict liability or otherwise, shall not
upon which liability is based. In no event shall OMEGA be liable for consequential,
RETURN REQUEST/ INQUIRIES
FOR NON-WARRANTY REPAIRS, consult OMEGA for current repair
charges. Have the following information available BEFORE contacting OMEGA:
1. P.O. number to cover the COST of the repair,
2. Model and serial number of product, and
3. Repair instructions and/or specific problems relative to the product.
DRG-AR-DC
DC Input, Field Configurable Limit Alarm
Instruction Sheet M2399/0796
DESCRIPTION
The DRG-AR-DC is a DIN rail mount,
DC voltage or current input limit alarm
(File
with dual setpoints and two contact
closure outputs. The field configurable
input and alarm functions offer flexible
setpoint capability. Input voltage spans
from 10mV to 200V and input current
spans from 1mA to 100mA can be field
configured. Bipolar inputs are also
accepted.
The DRG-AR-DC is configurable as a
single or dual setpoint alarm, with HI or
LO trips and failsafe or non-failsafe
operation. Also included are adjust-
able deadbands (0.25 to 5% of full
scale input) for each setpoint, a 24VDC
voltage source (isolated from line
power) for transducer excitation, and
a flexible DC power supply which ac-
cepts any voltage between 9 and
30VDC.
DIAGNOSTIC LEDS
The DRG-AR-DC is equipped with
three front panel LEDs. The green
LED is a dual function LED labeled
INPUT. This LED indicates line power
and input signal status. Active DC
power is indicated by an illuminated
exceed the purchase price of
LED. If this LED is off, check DC
incidental or special
power and wiring connection. If the
input signal is more than 110% of the
full scale range, the LED will flash at 8
Hz. Below 0%, the flash rate is 4 Hz.
Two red LEDs indicate the relay state
for each setpoint. An illuminated red
LED indicates the tripped condition.
OUTPUT
The DRG-AR-DC is equipped with two
SPDT (form C) relays, rated at 120VAC
or 28VDC at 5 amperes. Each of these
relays is independently controlled by
the field configurable setpoint and
deadband.
721−0607−00Β 11/97
OPERATION CONFIGURATION
The field configurable DRG-AR-DC Unless otherwise specified, the
factory presets the Model
limit alarm setpoints can be configured
for HI or LO, failsafe or non-failsafe DRG-AR-DC as follows:
operation. Each of the setpoints has
Input:
a respective HI or LO deadband. In a
Range:
tripped condition, the setpoint is ex-
Output:
ceeded and the appropriate red LED
Trip:
will illuminate. The trip will reset only
Failsafe:
when the process falls below the HI
Deadband: A, B: 0.25%
deadband or rises above the low
The DC power input accepts any DC
deadband (see Figure 1). For proper
source between 9 and 30V, typically a
deadband operation, the HI setpoint
12V or 24VDC source is used.
must always be set above the LO
setpoint. In failsafe operation, the
For other I/O ranges, refer to Table 1
relay is energized when the process is
and Figure 4. Reconfigure switche
below the HI setpoint or above the LO
SW1 for the desired input type, range
setpoint (opposite for non-failsafe). In
and function.
the failsafe mode, a power failure
results in an alarm state output.
WARNING: Do not attempt to
change any switch settings with power
Illustrating LO Setpoint
Illustrating HI Setpoint
applied. Severe damage will result!
Setpoint
100
Relay returns to its
untripped condition
1. With DC power off, set positions 9
Relay Trips (LED Off)
(LED Red)
and 10 of switch "SW1" for current or
voltage.
} 10% Deadband
50
} 10% Deadband
2. Set position 1 through position 4 of
Relay Trips
(LED Red)
input range switch "SW1" for the de-
Relay returns to its
untripped condition
sired input range (see Table 1).
(LED off)
Time
3. Set position 5 of input range switch
Figure 1: Limit alarm operation
"SW1" to ON for unipolar (e.g. zero
and effect of deadband(s).
based, 0-20mA) range or OFF for
DYNAMIC DEADBAND
bipolar (e.g. -100% offset,
LSI circuitry in the DRG-AR-DC pre-
-20 to 20mA) range (see Figure 4).
vents false trips by repeatedly sam-
4. Set position 6 and 7 of input
pling the input. The input must remain
range switch "SW1" to ON for a HI trip
beyond the setpoint for 100 millisec-
setpoint or OFF for a LO trip setpoint
onds, uninterrupted, to qualify as a
(see Figure 4).
valid trip condition. Likewise, the input
must fall outside the deadband and
5. Set position 8 of input range
remain there for 100 milliseconds to
switch "SW1" to ON for non-failsafe
return the alarm to an untripped con-
operation or OFF for failsafe
dition. This effectively results in a
operation (e.g. alarm trips upon
"dynamic deadband" —based on
power failure).
time— in addition to the normal
deadband.
Current
0-20mA
Dual, SPDT
A:HI, B:LO
No