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DRN-ACC
AC CURRENT INPUT
General Description:
The DRN Series of DIN rail-mountable signal conditioners are
available for Thermocouple, RTD, Strain, Process, AC Voltage,
AC Current and Pulse/Totalizer input types.
The factory calibrated signal conditioners are ideal for all
process and power monitoring applications, they feature 3-
way isolation, high accuracy input, programmable outputs,
and are excellent front end interfaces for programmable logic
controllers or data acquisition systems. For maximum user
configurability the signal conditioners allow complete input-
output scaling via a RS-232 connection to any PC or PLC.
Software Description:
The signal conditioner configuration program is a MS
DOS/Windows program (this manual is for the Windows
version). It is designed especially for the DRN Series Signal
Conditioner. This program will run on any PC with Windows
application and will start automatically.
Free Serial Communication software and ActiveX Controls
are on the CD-ROM enclosed with this shipment.
To download the latest software release
(or request a free CD-ROM) please go to:
www.omega.com/software
What You need:
¥Your choice of the signal conditioner
¥IBM PC or compatible
¥Windows software 3.1 or higher, or Windows 95/98
¥RJ12 connector with telephone cable
¥Adapter (DB9 or DB25 to RJ12)
Setting up your System
2
INPUT RANGES:
10 mA, 100 mA, 1 Amp, 5 Amp AC current
Dedicated input terminals for (10, 100 mA same input),
1 Amp and 5 Amp. Return terminal common to all ranges.
FREQUENCY RANGE:
30 Hz to 1KHz
INPUT IMPEDANCE:
3.3 Ohms for 10, 100 mA input
0.2 Ohms for 1 Amp input
0.04 Ohms for 5 Amp input
ISOLATION:
Dielectric strength to 1000 Vrms transient per 1 minute test
based on EN 61010 for 50 Vdc or Vrms working voltage.
Three way Isolation:
¥ Power to input
¥ Power to analog output/communication
¥ Input to analog output/communication
COMMON MODE REJECTION:
100 dB
INPUT OVER-CURRENT PROTECTION:
10% Above full scale continuously
100% Above full scale for 10 seconds
ANALOG TO DIGITAL TECHNIQUE:
Dual slope
READ RATE:
3 readings/second
ACCURACY AT 25 ¡C:
± 0.2% of FS from 30 Hz to 1 KHz
TEMPERATURE STABILITY:
10, 100 mA Range 100 ppm/¡C typical
1 Amp Range 150 ppm/¡C typical
5 Amp Range 200 ppm/¡C typical
STEP RESPONSE FOR RS232 OUTPUT:
2 seconds to 99% of the final value
(Filter time constant = 64)
RESPONSE TIME:
To verify the response time, check the carriage return <CR>,
it will be sent at the end of the response. You can send
another command after you receive the <CR>.
i.e.
send: *X01
response: X01<DATA><CR>
3
WARM UP TO RATED ACCURACY:
30 minutes
ANALOG OUTPUT SIGNAL TYPE:
Voltage: 0-10 Volt, maximum current 10mA
Current: 0-20 mA or 4-20 mA, maximum compliance
voltage 10 Volts (maximum loop resistance 500½)
ANALOG OUTPUT LINEARITY:
0.1% of FS
ANALOG OUTPUT STEP RESPONSE TIME:
2 seconds to 99% of final value
INPUT POWER:
10 to 32 Volt DC
POWER CONSUMPTION:
2.4 Watts (100 mA at 24 V DC)
OPERATING AMBIENT:
-5 to +55 ¡C
STORAGE TEMPERATURE:
-40 to +85 ¡C
RELATIVE HUMIDITY:
90% at 40 ¡C non-condensing
DIMENSIONS:
4
1
2
RETURN
{
5A
1A
100mA
SIGNAL INPUT
D
C
P
-
+
N/C
W
R
Introduction:
The AC current input signal conditioners are high
performance instruments that measure AC currents in 4
ranges with dedicated inputs. The current ranges are 10
mA, 100 mA, 1 Amp and 5 Amps. Key features of the signal
conditioners are built in internal current shunts, scalable
analog output and a simple RS232 interface for scaling analog
output and range selection. The RS232 interface may also be
used for digital transmission of the input signal to a computer
or a PLC. Additional features include three way isolation
between DC power, signal input and analog output/RS232.
Operation:
Note: When connecting a current signal, ensure that the input
signal current is less than or equal to the rating indicated on
signal input label.
THERE
ARE
NO
PROTECTIONS
AGAINST
OVERCURRENT AND THE UNIT WILL BE DAMAGED IF
THE INPUT CURRENT EXCEEDS THE MAXIMUM
RATING.
PLEASE
OBSERVE
THE
INPUT
SIGNAL
CONNECTION SPECIFIED IN THE SECTION BELOW .
THIS DEVICE MUST ONLY BE INSTALLED BY A
PROFESSIONAL ELECTRICIAN.
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