Red Lion IRMA Data Sheet

MODEL IRMA DC - INTELLIGENT RTD MODULE WITH ANALOG OUTPUT

4.20 REF

1.08

3.12

(27.5)

(106.7)

(79.2)

ERROR

POWER

IRMA

DIP SWITCH SETTINGS:

ON = 1 OFF = 0

MC2234X

9-32 VDC

ERROR

POWER

VDC+ 10

RTD(S)

V+ 4

I+ 1

VDC-

RTD(-)

1211

65V-

32I-

78RANGE

RTD

OHMS

RTD TYPE

385

392

OPEN SEN

DOWN

SENSOR

SWITCH

012

010

392/385

5 OPEN SEN UP/DN

OHMS/RTD

RANGE

OUTPUT CAL

FIELD CAL

BASIC CAL

876

RTD(+)

RANGE

MADE IN U.S.A.

RED LION CONTROLS

MODEL IRMA

YORK, PA.



USER PROGRAMMABLE INPUT

(RTD alpha = 0.00385 (DIN 43760), alpha = 0.00392, or resistance)



MICROPROCESSOR CONTROLLED



SIMPLE ADJUSTABLE RANGE SETTING (Using Input Signal)



RTD BREAK DETECTION



MOUNTS ON “T” AND “G” STYLE DIN RAILS



3-WAY ELECTRICAL ISOLATION (POWER/INPUT/OUTPUT)



MULTIPLE ANALOG OUTPUTS (0 to 20 mA, 4 to 20 mA, and 0 to

10 VDC)



WIDE OPERATING TEMPERATURE RANGE (-25°C to 75°C)



LED INDICATION (POWER & MEMORY ERROR)



9 to 32 VDC POWERED

DESCRIPTION

The IRMA accepts an RTD or resistance input and converts it into a voltage or current output. The output is linearly proportional to the temperature or resistance input. This output is ideal for interfacing to indicators, chart recorders, controllers, or other instrumentation equipment.

The IRMA is DC powered. The DC power input is isolated from the signal input and analog output. The unit scales the analog output proportionally to the RTD or resistance input signal. The analog output may be configured for one of the following: 0 to 20 mA, 4 to 20 mA, or 0 to 10 VDC. Making the signal conversion with the IRMA to a current output signal, makes the signal less susceptible to noise interference and allows accurate transmission over long distances. The 3-Way isolation allows the use of grounded RTD’s which can provide additional noise reduction benefits.

The IRMA uses an eight position DIP switch to accomplish the input sensor configuration, range selection, and unit calibration. A simple range setting technique (Field Calibration) is used so the actual input signal adjusts the output for scaling. This technique eliminates the need for potentiometers which are vulnerable to changes due to vibration.

The unit is equipped with a universal mounting foot for attachment to standard DIN style mounting rails, including top hat rail (T) according to EN 50

 7.5 and 35  15, and (G) profile according to EN 50 035 - G 32.

022 - 35

DIMENSIONS In inches (mm)

ORDERING INFORMATION

MODEL NO. DESCRIPTION PART NUMBER

IRMA Intelligent RTD Module IRMA3035

SAFETY SUMMARY

All safety related regulations, local codes and instructions that appear in the manual or on equipment must be observed to ensure personal safety and to prevent damage to either the instrument or equipment connected to it. If equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

CAUTION: Read complete instructions prior

to installation and operation of the unit.

SPECIFICATIONS

1. POWER: 9 to 32 VDC; 1.75 W. 200 mA max. current. The power supply

must have 400 mA for 200 msec. surge capacity.

2. INPUT: RTD 2, 3, or 4 wire, 100 ohm platinum, alpha = 0.00385

(DIN 43760), alpha = 0.00392, or resistance [selectable via DIP switches].

Excitation: 0.170 mA nominal

Lead resistance: Less than 0.5°C with 15 ohms max. per lead

Note: There is no lead compensation for 2 wire input. Field calibration

should be performed with equivalent series resistance.

3. OUTPUT: All output signals scaled linearly using temperature or resistance

input. Unit is shipped set for the 4 to 20 mA output. 4 to 20 mA or 0 to 20

mA selected via internal jumper.

Voltage Output Compliance:

0 to 10 VDC across min. 1 K load (10 mA) 20 mV peak to peak max. ripple (for frequencies up to 120 Hz)

Current Output Compliance:

0 to 20 mA through max. 600 load (12 VDC) 4 to 20 mA through max. 600 load (12 VDC) 15 mV peak to peak max. ripple across 600 load (for frequencies up to

120 Hz)

4. RTD BREAK DETECTION: Nominal values shown in the following order:

(0 to 20 mA, 4 to 20 mA, and 0 to 10 VDC).

Upscale: 22.9 mA, 22.5 mA, and 11.5 VDC

Downscale: -0.5 mA, 3.5 mA, and -0.4 VDC

5. RESPONSE TIME: 400 msec. (to within 99% of final value w/step input;

typically, response is limited to response time of probe.)

6. TEMPERATURE EFFECTS:

Temperature Coefficient:  0.025% of input range per C

7. DIELECTRIC WITHSTAND VOLTAGE: 1500 VAC for 1 minute

Working Voltage: 50 VAC

Power input to Signal input, Power input to Signal output, & Signal input to

Signal output.

ANALOG OUTPUT

CIRCUITRY

CONTROL

PWM

POWER

SUPPLY

22V

CIRCUITRY

PROCESS

CONVERTER

A/D

CURRENT OUTPUT

POWER

VOLTAGE OUTPUT

0.170mA

8. RANGE & ACCURACY: (12 Bit resolution) Accuracy:  ( 0.075% Range + 0.1°C [Conformity]) at 23°C after 45 min.

warm-up, conforming to ITS-90.

Note: RTD Conformity does not apply to resistance input. For best accuracy,

calibration should be performed under operating conditions.

Relative Humidity: Less than 85% RH (non-condensing) Span: The input span can be set to a min. of 1/8 of the full scale range,

anywhere within that range.

Range Accuracy

DIP SWITCH

INPUT RANGE

RTD alpha = 0.00385

RTD alpha = 0.00392

OHMS

Note: DIP switch settings ON = 1 OFF = 0

Accuracy Example:

RTD 385 Range “0”

-160°C to 654°C

TYPE RANGE

4 6 7 8 0 0 0 0 0 -160 to 654°C  0.61°C 1 0 0 0 1 -108 to 207°C  0.24°C 2 0 0 1 0 -5 to 414°C  0.31°C 3 0 0 1 1 194 to 608°C  0.31°C 0 1 0 0 0 -157 to 640°C  0.60°C 1 1 0 0 1 -106 to 203°C  0.23°C 2 1 0 1 0 -5 to 406°C  0.31°C 3 1 0 1 1 190 to 596°C  0.30°C 0 0 1 0 0 35.5 to 331.0   0.222  1 0 1 0 1 57.0 to 178.5   0.091  2 0 1 1 0 98.0 to 252.0   0.116  3 0 1 1 1 173.5 to 316.5   0.107 

( ±0.61°C + ±0.1°C) = ±0.71°C

TEMPERATURE

& OHMS RANGE

ConformityRange

RANGE

ACCURACY

Total Error

9. CERTIFICATIONS AND COMPLIANCES: SAFETY

IEC 61010-1, EN 61010-1: Safety requirements for electrical equipment

for measurement, control, and laboratory use, Part 1.

ELECTROMAGNETIC COMPATIBILITY

Immunity to EN 50082-2

Electrostatic discharge

EN 61000-4-2

Level 2; 4 kV contact Level 3; 8 kV air

EN 61000-4-3Electromagnetic RF fields

Level 3; 10 V/m 80 MHz - 1 GHz

Fast transients (burst)

EN 61000-4-4

Level 4; 2 kV I/O Level 3; 2 kV power

RF conducted interference

EN 61000-4-6

Level 3; 10 V/rms 150 KHz  80 MHz

Power frequency magnetic fields

EN 61000-4-8

Level 4; 30 A/m

Emission to EN 50081-2

RF interference

EN 55011

Enclosure class B

Notes:

1. This device was designed for installation in an enclosure. To avoid

electrostatic discharge, precautions should be taken when the device is mounted outside an enclosure. When working in an enclosure (ex. making adjustments, setting switches etc.) typical anti-static precautions should be observed before touching the unit.

2. Self-recoverable loss of performance during EMI disturbance at 10 V/m:

Analog output signal may deviate during EMI disturbance.

For operation without loss of performance:

Unit is mounted in a metal enclosure (Buckeye SM7013-0 or equivalent)

I/O and power cables are routed in metal conduit connected to earth gr ound.

Refer to the EMC Installation Guidelines section of this bulletin for additional

information.

10. ENVIRONMENTAL CONDITIONS: Operating Temperature Range: -25°C to 75°C (-13°F to 167°F) Storage Temperature Range: -40 to 85°C (-40°F to 185°F) Operating and Storage Humidity: 85% max. relative humidity (non-

condensing) from -25°C to 75°C.

Vibration According to IEC 68-2-6: Operational 5 to 150 Hz, in X, Y, Z

direction for 1.5 hours, 2 g’s.

Shock According to IEC 68-2-27: Operational 30 g’s, 11 msec in 3 directions. Altitude: Up to 2000 meters

11. MOUNTING: Universal mounting foot for attachment to standard DIN style mounting rails, including top hat (T) profile rail according to EN50022

 7.5 and 35  15, and G profile rail according to EN50035 - G32.

- 35

12. CONNECTION: Compression type terminal block

13. CONSTRUCTION: High impact black plastic case, Installation Category I, Pollution Degree 2.

14. WEIGHT: 4.02 oz. (114.0 g)

BLOCK DIAGRAM

FUNCTION DESCRIPTIONS

Open Sensor Detection

The output can be set to go Upscale or Downscale for the detection of an open sensor. The nominal values for each output range are listed under RTD Break Detection in the Specifications section. This setting is always active, so changes to the setting are effective immediately.

Unit Malfunction

If the unit has scaling problems (output remains at -0.5 mA, 3.5 mA, or -0.5 VDC nominal), check the ERROR LED on the front of the unit. An E2PROM problem is indicated when the ERROR LED is on. If the ERROR LED is on, perform a Basic Calibration followed by a Field Calibration. Turn the power off for 5 seconds. Turn power on and check if the ERROR LED is on. If the LED is on, contact the factory.

EMC INSTALLATION GUIDELINES

Although this unit is designed with a high degree of immunity to ElectroMagnetic Interference (EMI), proper installation and wiring methods must be followed to ensure compatibility in each application. The type of the electrical noise, source or coupling method into the unit may be different for various installations. Cable length, routing and shield termination are very

important and can mean the difference between a successful or a troublesome

installation. Listed below are some EMC guidelines for successful installation in an industrial environment.

1. Use shielded (screened) cables for all Signal and Control inputs. The shield

(screen) pigtail connection should be made as short as possible. The

connection point for the shield depends somewhat upon the application.

Listed below are the recommended methods of connecting the shield, in order

of their effectiveness.

a. Connect the shield only at the rail where the unit is mounted to earth ground

(protective earth).

b. Connect the shield to earth ground at both ends of the cable, usually when

the noise source frequency is above 1 MHz.

c. Connect the shield to common of the unit and leave the other end of the

shield unconnected and insulated from earth ground.

2. Never run Signal or Control cables in the same conduit or raceway with AC

power lines, conductors feeding motors, solenoids, SCR controls, and heaters,

etc. The cables should be run in metal conduit that is properly grounded. This

is especially useful in applications where cable runs are long and portable

two-way radios are used in close proximity or if the installation is near a

commercial radio transmitter.

3. Signal or Control cables within an enclosure should be routed as far away as

possible from contactors, control relays, transformers, and other noisy

components.

4. In extremely high EMI environments, the use of external EMI suppression

devices, such as ferrite suppression cores, is effective. Install them on Signal

and Control cables as close to the unit as possible. Loop the cable through the

core several times or use multiple cores on each cable for additional protection.

Install line filters on the power input cable to the unit to suppress power line

interference. Install them near the power entry point of the enclosure. The

following EMI suppression devices (or equivalent) are recommended:

Ferrite Suppression Cores for signal and control cables:

Fair-Rite # 0443167251 (RLC #FCOR0000) TDK # ZCAT3035-1330A Steward #28B2029-0A0

Line Filters for input power cables:

Schaffner # FN610-1/07 (RLC #LFIL0000) Schaffner # FN670-1.8/07 Corcom #1VR3

Note: Reference manufacturer’s instructions when installing a line filter.

5. Long cable runs are more susceptible to EMI pickup than short cable runs.

Therefore, keep cable runs as short as possible.

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