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)
7
V+ 4
I+ 1
VDC-
RTD(-)
1211
98
65V-
32I-
78RANGE
RTD
OHMS
RTD TYPE
385
392
OPEN SEN
DOWN
SENSOR
UP
0
1
SWITCH
4
0
SWITCH
5
SWITCH
1
6
SWITCH
1
0
012
3
0
0
1
010
11
392/385
5 OPEN SEN UP/DN
OHMS/RTD
RANGE
1
4
3
2
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.
1
ANALOG
OUTPUT
CIRCUITRY
1
3
CIRCUITRY
CONTROL
PWM
POWER
SUPPLY
22V
3V
CIRCUITRY
PROCESS
CONVERTER
A/D
CURRENT
OUTPUT
12
10
4V
POWER
DC
6
4
+
+
-
-
VOLTAGE
OUTPUT
3V
9
8
7
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
1
important and can mean the difference between a successful or a troublesome
2
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.
2
Loading...