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MODEL IFMA - DIN-RAIL FREQUENCY TO ANALOG CONVERTER
SIMPLE ON-LINE RANGE SETTING
(Using Actual Input Signal or Signal Generator)
USER SETTABLE FULL SCALE FREQUENCY FROM
1 Hz to 25 KHz
FOUR OUTPUT OPERATING RANGES
(0 to 5 V, 0 to 10 V, 0 to 20 mA, and 4 to 20 mA)
PROGRAMMABLE INPUT CIRCUIT ACCEPTS OUTPUTS FROM A
VARIETY OF SENSORS
85 to 250 VAC and 9 to 32 VDC POWERED VERSIONS
AVAILABLE
LOW FREQUENCY CUT-OUT AND OVERRANGE INDICATION
3-WAY ELECTRICAL ISOLATION (POWER/INPUT/OUTPUT)
INPUT AND OUTPUT INDICATION LEDs
UL Recognized Component,
File # E137808
Bulletin No. IFMA-F
Drawing No. LP0340
Released 07/09
DESCRIPTION
The Model IFMA accepts a frequency input, and outputs an analog voltage or
current in proportion to the input frequency, with 0.1% accuracy. The full scale
input frequency can be set to any value from 1 Hz to 25 KHz, either with a
frequency source, or digitally with the on-board rotary switch and push-button.
The IFMA utilizes a seven position DIP switch, a rotary switch, a push-button
and two indication LEDs to accomplish input circuit configuration, operational
parameter set-up, and Input/Output indication. The input circuitry is DIP switch
selectable for a variety of sources.
The indication LEDs are used during normal operation to display the input
and output status of the IFMA. These LEDs are also used to provide visual
feedback to the user of the existing parameter settings during parameter set-up.
The IFMA operates in one of four output modes. The programmable minimum
and maximum response times provide optimal response at any input frequency.
The unit is equipped with a universal mounting foot for attachment to
standard DIN style mounting rails, including top hat profile rail according to EN
50 022 - 35 x7.5 and 35 x 15, and G profile rail according to EN 50 035 - G 32.
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.
SPECIFICATIONS
1. POWER:
AC Operation: 85 to 250 VAC, 48 to 62 Hz; 6.5 VA
DC Operation: 9 to 32 VDC; 2.5 W
Power Up Current: Ip = 600 mA for 50 msec. max.
2. SENSOR POWER: (AC version only) +12 VDC ±25% @ 60 mA max.
3. OPERATING FREQUENCY RANGE:
From 0 Hz to 25 KHz; user selectable.
4. SIGNAL INPUT: DIP switch selectable to accept signals from a variety of
sources, including switch contacts, outputs from CMOS or TTL circuits,
magnetic pickups, and all standard RLC sensors.
Current Sourcing: Internal 1 K pull-down resistor for sensors with current
sourcing output. (Max. sensor output current = 24 mA @ 24 V output.)
Current Sinking: Internal 3.9 K pull-up resistor for sensors with current
sinking output. (Max. sensor current = 3 mA.)
Read complete instructions prior to
installation and operation of the unit.
CAUTION: Risk of Danger.
CAUTION: Risk of electric shock.
Low Bias: Input trigger levels V
sensitivity when used with magnetic pickups.
Hi Bias: Input trigger levels V
Max. Input Signal: ±90 V; 2.75 mA max. (With both Current Sourcing and
= 0.25 V, VIH = 0.75 V; for increased
IL
= 2.5 V, VIH = 3.0 V; for logic level signals.
IL
Current Sinking resistors switched off.)
5. SIGNAL VOLTAGE OUTPUT (Selectable):
0 to 5 VDC @ 10 mA max.
0 to 10 VDC @ 10 mA max.
6. SIGNAL CURRENT OUTPUT (Selectable):
0 to 20 mA @ 10 VDC min.
4 to 20 mA@ 10 VDC min.
7. OUTPUT COMPLIANCE:
Voltage: 10 V across a min. 1K load (10 mA). Factory calibrated for loads
greater than 1 M.
Current: 20 mA through a max. 500 load (10 VDC).
8. ACCURACY: ±0.1% of full scale range (±0.2% for 0 to 5 VDC range).
9. RESOLUTION:
Voltage : 3.5 mV min.
Current: 5 μA min.
DIMENSIONS In inches (mm)
ORDERING INFORMATION
PART NUMBERS FOR AVAILABLE
MODEL NO.
DESCRIPTION
IFMAPulse Rate to Analog ConverterIFMA0035IFMA0065
For more information on Pricing, Enclosures & Panel Mount Kits refer to the
RLC Catalog or contact your local RLC distributor.
1
SUPPLY VOLTAGES
9 to 32 VDC85 to 250 VAC
10
12
AC VERSION
ISOLATED
OUTPUT
SUPPLY
SUPPLY
PROCESS
INPUTINPUT
PROCESS
SUPPLY
SUPPLY
OUTPUT
ISOLATED
DC VERSION
12
10
INPUT
(GREEN)
OUTPUT
(RED)
+5V
INPUT LED
OUTPUT LED
S4
S5
S6
S7
MODE
CFG2
CFG1
CFG0
BCD
SWITCH
BCD
INPUTS
PUSH
BUTTON
BUTTON
INPUT
DIP
SWITCH
INPUTS
PROCESS
CIRCUITRY
8
7
9
S3
SINK
3.9K
1K
S1
SRC
+
-
10.0K
0.1µf
100pf
33.2K
8.06K
54.9K
392K
10K
S2
LOGIC
+12V
+5V
+5V
+12V+12V
INPUT
SIGNAL
9 to 32 VDC
+5V
+5V
+5V
200K
0.1µf
-
+
47.5K
+
-
3
4
1
6
10.0K
200K
10.0K
24.3Ω
1.47K
O
V+
I+
I-
V-
Vref
Vout
OUTPUT
DAC
ISOLATED ANALOG OUTPUT
0.1µf
18Vo
SUPPLY
12 VDC
SIGNAL
INPUT
COMMON
OUTPUT
DAC
CONTROL
LINES
SENSOR
INPUT
PUSH
DC
SWITCHING
CIRCUIT
(60 mA)
(AC VERSION ONLY)
+
-
85 to 250
VAC
AC
POWER
AC
SWITCHING
CIRCUIT
SPECIFICATIONS (Cont’d)
10. RESPONSE TIME: 5 msec +1 period to 10 sec +1 period; user selectable
11. INPUT IMPEDANCE: 33 K min. with the sink and source DIP switches
in the OFF position (See Block Diagram).
12. INPUT AND POWER CONNECTIONS: Screw in terminal blocks.
13. ISOLATION BREAKDOWN VOLTAGE (Dielectric Withstand): 2200
V between power & input, and power & output; 500 V between input &
output for 1 minute.
14. CERTIFICA TIONS AND COMPLIANCES:
SAFETY
UL Recognized Component, File #E137808, UL508, CSA C22.2 No. 14
Recognized to U.S. and Canadian requirements under the Component
Recognition Program of Underwriters Laboratories, Inc.
IECEE CB Scheme Test Report # 97ME50135-042297
Issued by Underwriters Laboratories, Inc.
IEC 61010-1, EN 61010-1: Safety requirements for electrical equipment
for measurement, control, and laboratory use, Part 1.
EMC EMISSIONS:
Meets EN 50081-2: Industrial Environment.
CISPR 11 Radiated and conducted emissions
EMC IMMUNITY:
Meets EN 50082-2: Industrial Environment.
ENV 50140 - Radio-frequency radiated electromagnetic field
ENV 50141 - Radio-frequency conducted electromagnetic field
EN 61000-4-2 - Electrostatic discharge (ESD)
2
1
BLOCK DIAGRAM
EN 61000-4-4 - Electrical fast transient/burst (EFT)
EN 61000-4-8 - Power frequency magnetic field
Notes:
1. For operation without loss of performance:
Unit is mounted on a rail in a metal enclosure (Buckeye SM7013-0 or
equivalent) and I/O cables are routed in metal conduit connected to
earth ground.
2. 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.
Refer to the EMC Installation Guidelines section of this bulletin for
additional information.
15. ENVIRONMENTAL CONDITIONS:
Operating Temperature: 0 to 50°C
Storage Temperature: -40 to 80°C
Operating and Storage Humidity: 85% max. (non-condensing) from 0°C
to 50°C.
Vibration according to IEC 68-2-6: Operational 5 to 150 Hz, in X, Y, Z
direction for 1.5 hours, 3 g’s.
Shock according to IEC 68-2-27: Operational 30 g’s, 11 msec in 3 directions.
Altitude: Up to 2000 meters
16. CONSTRUCTION: Case body is black, high impact plastic. Installation
Category II, Pollution Degree 2
17. WEIGHT: 6 oz. (0.17 Kg)
OVERVIEW
The Model IFMA continuously monitors a frequency input and outputs a
voltage or current signal in proportion to the input signal. The output is accurate
to ±0.1% of full scale for Operating Modes 2, 3, and 4. Operating Mode 1 is
accurate to ±0.2% of full scale. The green Input LED blinks at the rate of the
input frequency. At about 100 Hz, the Input LED will appear to be solid on. At
very low frequencies, the Input LED blinks slowly and may also appear to be
solid on. A loss of signal may also cause the Input LED to remain on, depending
on the DIP switch set-up. In this case, the red LED also turns on.
The Minimum Response Time parameter sets the minimum update time of the
output. The actual response time is the Minimum Response Time plus up to one
full period of the input signal. The IFMA counts the negative edges occurring
during the update time period, and computes the average frequency value for that
time. This action filters out any high frequency jitter that may be present in the
input signal. The longer the Minimum Response Time, the more filtering occurs.
The Maximum Response Time parameter sets the Low Frequency Cut-out
response time for the unit. If a new edge is not detected within the time specified
by the Maximum Response Time setting, the unit sets the output to the
existing Low Frequency Cut-out Value setting depending on the selected range
and calibration setting.
LED. The Maximum Response Time can be set shorter than the Minimum
Response Time. In this case, as long as the input signal period is shorter than the
Maximum Response Time, the unit continues to indicate the input frequency at
its output. But, if the input period at any time exceeds the Maximum Response
Time, the unit immediately takes the output to the Low Frequency Cut-out
Value, regardless of the Minimum Response Time setting.
the user can adjust the minimum calibration to any value less than the Full Scale
value, and the Full Scale value to any value greater than the minimum value. If
the minimum and full scale values are brought closer together, the accuracy of the
unit decreases proportionate to the decreased range of the unit (See Calibration).
2
The unit also indicates Low Frequency Cut-out by turning ON the output
The IFMA is calibrated at the factory for all of the selected ranges. However,
EMC INSTALLATION GUIDELINES
123
465
798
101211
OUT
IN
+12VDC
60mA
INPUT
COMM
~
AC
~
AC
V+V-
I+I-
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. The unit becomes more immune to EMI with fewer I/O
connections. Cable length, routing, and shield termination are very important
and can mean the difference between a successful installation or 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:
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.
POWER AND OUTPUT CONNECTIONS
AC Power
Primary AC power is connected to terminals 10 and 12 (labeled AC). For best
results, the AC Power should be relatively “clean” and within the specified
variation limits. Drawing power from heavily loaded circuits or from circuits
that also power loads that cycle on and off, should be avoided.
DC Power
The DC power is connected to terminals 10 and 12. The DC plus (+) power
is connected to terminal 10 and the minus (-) is connected to terminal 12.
It is recommended that separate supplies be used for sensor power and unit
power. Using the same supply for both will negate isolation between input and
power.
Current Output
When using Operating Mode 3 or 4, the output device is connected to
terminals 1(I+) and 3 (I-).
Voltage Output
When using Operating Mode 1 or 2, the output device is connected to
terminals 4 (V+) and 6 (V-).
Note: Although signals are present at
voltage and current outputs at the
same time, only the selected mode is
in calibration at any one time.
Example: Operating Mode 2 is
selected. The voltage level present
at the voltage terminals is in
calibration, but the signal
appearing at the current terminals
does not conform to either of the
current output modes.
WIRING CONNECTIONS
Also cabling should conform to appropriate standards of good installation, local
codes and regulations. It is recommended that power supplied to the unit (AC
or DC) be protected by a fuse or circuit breaker.
All conductors should meet voltage and current ratings for each terminal.
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