Omega Vehicle Security DRN-ACC AC Current Input, Input Ranges, Frequency Range, Isolation

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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:

3.3Ohms for 10, 100 mA input

0.2Ohms for 1 Amp input

0.04Ohms 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
R E T U R N	1	2
5 A
1 A
{1 0 0 m A	SIGNAL INPUT
				D
				C
	+	-	N/C	P
				R
				W

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.