3
CHECKSUM ERRORS
A checksum is performed every time power is applied to the IAMA. If a
checksum error occurs, the LED’s will indicate where the error occurred
according to Table 1, LED Indications. Operation with a checksum error is not
recommended but can be done in critical situations. If an error occurs, re-
calibration of the field or factory ranges to be used must be performed.
If a field checksum error occurs, the IAMA will operate only in factory
mode. If a factory checksum occurs, the IAMA will operate only in a previously
calibrated field mode. Do not perform a field scaling until the factory checksum
is cleared. Since a checksum error is a high priority LED indication, the LEDs
will indicate the error until it is cleared. This will exclude other LED
information.
TABLE 1, LED INDICATIONS
GETTING STARTED
One method for the Input (1 or 2 below) should be configured, and one
method for the Output (3 or 4 below) should be configured.
1. FACTORY preprogrammed settings for the Input, see Section 1.0
2. FIELD scaling method for the Input, see Section 2.0
3. FACTORY preprogrammed setting for the Output, see Section 3.0
4. FIELD scaling method for the Output, see Section 4.0
Note: The ranges should only be changed while power is removed from the
IAMA.
TABLE 2, OUTPUT RANGE SETTINGS
TABLE 3, INPUT RANGE SETTINGS
FIELD OR FACTORY MODE SELECTION
SELECTING FIELD MODE (2 Methods):
1. Scale the input or output according to SCALING PROCEDURE 2.0 or 4.0
2. Before applying power, set the input or output (or both) field/factory switch
to the up (field) position. Field calibration values will be restored upon
power-up. If the IAMA has not been previously field calibrated, the E
2
prom
will contain the factory calibration values which will be restored.
SELECTING FACTORY MODE (2 Methods):
1. Before applying power to the IAMA set the input or output (or both)
field/factory switch to the down (factory) position. Factory calibration values
will be restored upon power-up.
2. While power is applied to the IAMA and it is operating in the field input
and/or output mode, set the desired field/factory switch(s) to the down
(factory) position. The factory calibration values will be restored.
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 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.
WIRING CONNECTIONS
All conductors should meet voltage and current ratings for each terminal.
Also cabling should conform to appropriate standards of good installation, local
codes and regulations. It is recommended that power supplied to the unit be
protected by a fuse or circuit breaker. When wiring the unit, use the numbers on
the label to identify the position number with the proper function. Strip the wire,
leaving approximately 1/4" (6 mm) of bare wire exposed. Insert the wire into
the terminal, and tighten the screw until the wire is clamped tightly.
RANGE DIP
SWITCHES
3
4
5
OUTPUT
RANGE
0 - 5 V
0
0
0
VOLTAGE
OUTPUTS
0 - 10 V
0
0
1
0 - 1 mA
0
1
0
4 - 20 mA
0
1
1
CURRENT
OUTPUTS
0 - 20 mA
1
0
0
RANGE
RANGE DIP SWITCHES
6
7
8
9
10
INPUT
VOLTAGE
0 - 20 mV
0
0
0
0
0
0 - 50 mV
0
0
0
0
1
0 - 100 mV
0
0
0
1
0
0 - 200 mV
0
0
0
1
1
0 - 500 mV
0
0
1
0
0
0 - 1 V
0
0
1
0
1
0 - 2 V
0
0
1
1
0
1 - 5 V
0
0
1
1
1
0 - 5 V
0
1
0
0
0
0 - 10 V
0
1
0
0
1
0 - 20 V
0
1
0
1
0
0 - 50 V
0
1
0
1
1
0 - 100 V
0
1
1
0
0
0 - 1 mA
0
1
1
0
1
0 - 2 mA
0
1
1
1
0
0 - 5 mA
0
1
1
1
1
0 - 10 mA
1
0
0
0
0
4 - 20 mA
1
0
0
0
1
0 - 20 mA
1
0
0
1
0
0 - 50 mA
1
0
0
1
1
INPUT
CURRENT
0 - 100 mA
1
0
1
0
0
Note: DIP switch settings 0 = OFF 1 = ON
Note: DIP switch settings 0 = OFF 1 = ON
CONDITION
GREEN LED
RED LED
Normal Operation
On
Off
Scaling Mode
Alternate with Red
Alternate with Green
Under Range
Off
Slow Flash (0.8 sec rate)
Over Range
Off
Fast Flash (0.4 sec rate)
Invalid Range
Off
On
Illegal Range Change
Off
On
Factory Checksum
Off
On, short off
Field Checksum
On, short off
Off
User Factory Calibration
Fast Flash for 2 sec
Off
