aci ANALOG RESCALING Series Installation instructions

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
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Version: 3.0
I0000470
FIGURE 1: DIMENSIONS
ANALOG RESCALING MODULE
INTERFACE SERIES
Installation & Operation Instructions
ARM
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3.69” (93.82mm)
2.17”
(55.27mm)
0.70” (17.78mm)
2.30”
58.42mm)
2.70” (68.58mm)
BOARD
SNAP TRACK
GENERAL INFORMATION
The ARM is an analog rescaling module which
accepts an analog (voltage or current) input signal
and rescales it to another voltage or current output
signal. The top-adjust trimmer potentiometers can
be used to make ne adjustments to output ranges
for maximum exibility. This device can attenuate
an input signal to 100%. The ARM also has an
adjustable gain and oset. The output gain can be
adjusted from 1 to 25 times the input (gain will vary
depending on input). The oset of the output can
be adjusted anywhere from 0 to +/- 20 VDC. The
ARM also has the ability to reverse an input signal.
The ARM has a regulated 20 VDC power supply
output to power sensors. The ARM can also accept
a resistance input by using voltage divider
applications. The ARM is eld calibratable,
however, factory calibration is available upon
request for an additional charge. This will speed up
installation time for the end user.
MOUNTING INSTRUCTIONS
Circuit board may be mounted in any position. If circuit board slides out of snap track, a nonconductive
“stop”
may be required. Use only ngers to remove board from snap track. Slide out of snap track or push against
side of snap track and lift that side of the circuit board to remove. Do not ex board or use tools.
WIRING INSTRUCTIONS
PRECAUTIONS
• Remove power before wiring. Never connect or disconnect wiring with power applied.
• When using a shielded cable, ground the shield only at the controller end. Grounding both
ends can cause a ground loop.
• It is recommended you use an isolated UL-listed class 2 transformer when powering the unit
with 24 VAC. Failure to wire the devices with the correct polarity when sharing transformers may
result in damage to any device powered by the shared transformer.
• If the 24 VDC or 24VAC power is shared with devices that have coils such as relays, solenoids,
or other inductors, each coil must have an MOV, DC/AC Transorb, Transient Voltage Suppressor
(ACI Part: 142583), or diode placed across the coil or inductor. The cathode, or banded side of the
DC Transorb or diode, connects to the positive side of the power supply. Without these snubbers,
coils produce very large voltage spikes when de-energizing that can cause malfunction or
destruction of electronic circuits.
• All wiring must comply with all local and National Electric Codes.

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 2
Version: 3.0
I0000470
FIGURE 2: WIRING
Note: The ARM does NOT isolate the input signals from the
output. Use the Analog Isolation Module (AIM1, AIM2, or AIM3)
if you need to isolate the signal from the device being
controlled.
FACTORY CALIBRATION
The ARM is set as follows:
•No Attenuation to the Input Signal
•Voltage Input Signal
•Voltage Output Signal
•Normal Acting Output Signal
•No Oset to the Output Signal
•Gain of 1 to the Output Signal (1:1)
The ARM can be ordered calibrated to your specications or you may follow the procedure below to set
your own calibration.
Be sure to check the input, output, GAIN and OFFSET specications of the ARM. It is possible that the ARM
cannot re-scale to your requirements.
Calibration
Complete the following steps to change the calibration of the ARM. You will need a digital volt/current
meter, a 24 VDC power supply and a voltage input signal simulator. (A 5K ohm or greater trim pot can be
used as a voltage input signal simulator by connecting one end of the trim pot resistance winding to the
(+) 24 of the power supply, the other end of the trim pot resistance winding to the (-) 24 of the power
supply and the wiper end of the trim pot to the “IN”terminal of the ARM).
EQUIVALENT CALIBRATION VOLTAGE
Use a voltage signal for your input signal during calibration: this makes both the procedure and the
explanation easier. If you will require a current input when you are nished, use the equation below to nd
the equivalent calibration voltage to use during the calibration procedure:
FINE GAIN OSET REV ATTN
PWR
L1
J1
J2
J3
OFFSET
RN
OUT
IN
IE
OUT
IN
P
+ 24 - O-+
Analog Output Signal
Note: 20VDC Regulated Accessory Power output used
for resistance to analog conversions
24 VAC/DC
Power Supply
Analog Input Signal
(+)
(+)
(+)
(+)
(-) (-)
OUT
IN
P
+ 24 -
24 VDC
24 VAC
Power
Supply
Loop
Powered
Sensor
(+) (-)
J3 OUT
IN
IE
Set IN to Current (I)
for Loop Powered
Sensor
20 VDC
at this
terminal
Input from 2-wire mA loop powered
sensor (using 20V ARM "P" terminal
for power)

Automation Components, Inc.
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EQUIVALENT CALIBRATION VOLTAGE (Continued)
Equivalent Calibration Voltage = Required Input Signal Amps x 250
Example: 1 VDC is the equivalent calibration voltage for a 4 milliamp input signal (1 = .004
x 250) or 5 VDC is the equivalent calibration voltage for a 20 milliamp input signal (5 = .020
x 250).
Step 1) Trim Pot Presets Set all pots as follows to start (These are multi-turn trim pots with no hard stops;
they may make a slight clicking sound at either end of their range):
Turn the following pots full clockwise (25 turns): GAIN = gain of 1
FINE
OFFSET = 0 volts oset
REV = 0 volts reverse
Turn the following pot Full Counterclockwise (25 turns): ATTN = (no input signal attenuation)
Step 2) Jumper Shunt Presets
J1- NORMAL OR REVERSE ACTING: Set in “N” position for direct acting output signal. (If you require a
reverse acting output signal, you will set this shunt in the “R”position in Step 7).
J2 - OFFSET: Set in the “O”position for no oset to the output. (If you will require a“+” or“-” oset, you will
set this shunt in the appropriate position in Step 6).
J3 IN - INCOMING SIGNAL VOLTAGE OR CURRENT: Set in “E”position for voltage input . (If you require a
current input, you will set this shunt in the “I” position AFTER you are nished with the calibration
procedure).
J3 OUT - OUTGOING SIGNAL VOLTAGE OR CURRENT: Set in “E” position for voltage output (If you
require a current output, you will set this shunt in the “I” position AFTER you are nished with the
calibration procedure ).
Step 3) Wiring Connections
Make the following connections with the power OFF:
Connect a 24 volt AC or DC power supply to the ARM terminals “+24” and “-24”.
Connect the input signal common (-) and the (-) meter lead to the“-24” terminal. Connect (+) input signal
lead to the“IN” terminal.
Connect (+) meter lead to the“OUT” terminal.
Step 4) Power Up
Turn on the 24 volt power supply: the POWER indicator will light.
Step 5) Input/Output Signal Adjustments
In this step you will gure the desired voltage input signal span and the desired voltage output signal span
(see the section on Equivalent Calibration Voltage) and calibrate the ARM to these input and output signal
spans.
FIGURE 3: JUMPER SHUNTS
J2
OFFSET
O-+
J2
OFFSET
O-+
J2
OFFSET
O-+
No Oset - No
Output signal
span shift
Positive Oset
shifts Output
signal span higher
Negative Oset
shifts Output
signal span lower
Figure C
Shunt as shown selects Desired Output Oset
J3 OUT
IN
IE
J3 OUT
IN
IE
Sample Settings for Input
& Output Signal
Current IN/OUT Voltage IN/OUT
Figure B
J3 R N J3 RN
Sunt as shown selects
Desired Output Action
Direct Acting
Output increases
as Input increases
Reverse Acting
Output decreases
as Input increases
Figure A

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
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Version: 3.0
I0000470
EQUIVALENT CALIBRATION VOLTAGE (Continued)
To calculate the voltage input signal span, subtract the minimum voltage input signal from the maximum
input signal (i.e. a 0 to 5 volt input signal will give you a 5 volt input signal span: 5-0=5).
To calculate the voltage output signal span, subtract the minimum voltage output signal from the
maximum voltage output signal (i.e. a 3 to 15 volt output signal will give you a 12 volt output signal span:
15-3=12).
Take the number for the voltage input signal span and apply this voltage to“IN”terminal.
Compare the output voltage reading on your meter with the voltage output signal span you calculated
above. If the meter reading is higher, adjust the “ATTN” trim pot until the meter reading drops to the
calculated output span. If the meter reading is lower, adjust the“GAIN”and “FINE”trim pots until the meter
reading increases to the calculated output signal span.
Step 6) Oset Adjustments
The oset adjustments simply shift the output signal range up or down from a “no oset” condition.
Example: An output signal range in a“no oset“ condition is 3 to 15 volts. Adding an oset
of 2 volts would make the output signal range 5 to 17 volts or subtracting an oset of 2 volts
would make the output signal range 1 to 13 volts.
Apply the minimum voltage input signal and read the minimum output signal on the meter. With the
“OFFSET” jumper shunt “J2” in the “O” position (from Step 6), no oset voltage will be added or subtracted
from the output signal range.
If you need to shift the output signal range up, set the “OFFSET” jumper shunt “J2” in the “+” position and
adjust the “OFFSET” trim pot until you increase the voltage reading on the meter to match the desired
minimum output voltage. (Remember, this also increases the maximum output signal by the same
amount.)
If you need to shift the output signal range down, set the“OFFSET”jumper shunt “J2” in the“-”position and
adjust the “OFFSET” trim pot until you decrease the voltage reading on the meter to match the desired
minimum output voltage. (Remember, this also decreases the maximum output by the same amount.)
Step 7) Reverse Action Adjustments
If you will require your output signal to reverse act, set jumper shunt “J1” in the “R” position. Apply the
minimum voltage input signal and adjust the“REV” trim pot for the highest desired output signal.
Check the low, mid-scale and high signal points to insure proper calibration.
Step 8) Final Adjustments
If you require a current input, set the “J3” IN jumper shunt in the“I”position. If you require a current output,
set the “J3” OUT jumper shunt in the “I” position. Check operation of the ARM for desired signal re-scaling
and operation.

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
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Version: 3.0
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Page 4
ARM CALIBRATION WORK SHEET : Fill in and circle answers.
1. Input: minimum______maximum______ mA or VDC, Output: minimum______maximum______ mA or
VDC
2. Is the input VDC? Yes/No. Is the output VDC? Yes/No
a) If yes to both, set jumper J3 (IN/OUT) to E and skip to step 5.
b) If no to both, set jumper J3 (IN/OUT) to I and skip to step 5.
c) If yes to only one, continue to step 3.
3. Is current the input signal? If no, skip to step 4. If yes, perform the following:
a) Set J3 (IN) to I and (OUT) to E.
b) Multiply input minimum by 250 and enter value in “Input minimum” in step 5a.
c) Multipy input maximum by 250 and enter value in “Input maximum” in step 5a.
Example : minimum=4mA = .004 x 250 = 1 VDC and maximum=20mA = .020 x 250 = 5 VDC.
4. Is voltage the input signal. If no, skip to step 5. If yes,
a) Set J3 (IN/OUT) to E. Output jumper will be changed to I in later steps.
b) Multiply output minimum by 250 and enter value in “Output minimum” in step 5b,
c) Multiply maximum by 250 and enter value in “Output maximum” in step 5b.
Example : minimum 4mA = .004 x 250 = 1 VDC and maximum 20mA = .020 x 250 = 5 VDC.
5. Enter mA, VDC or equivalent values below. Note: Do not mix voltage and current.
a) Input minimum______ Input maximum______ maximum-minimum = Input span______
b) Output minimum______ Output maximum______ maximum-minimum = Output span______
6. Preset trimpots: 25 Turns until it clicks.
25 Turns Clockwise - Gain, Fine, Oset and Reverse
25 Turns Counter clockwise – Attenuation
7. Make all connections including signal generator and multimeter. Apply power (24 VAC or VDC).
8. Set jumpers J2 to 0 and J1 to N
9. First test: input a 50% signal. Is the input equal to or close to the output?
If yes, proceed to step 10.
If no, return to step 7.
Note: Min, max and span values are found in step 5.
10. Supply the “input span” signal or equivalent to the input. (Refer to step 5).
a) If the “input span” is less than “output span”, turn the gain or ne trim pot until the output is equal
to the “output span” signal.
b) If the “input span” is greater than “output span”, turn the attenuation trim pot until the
output is equal to the “output span” signal.
11. Setting the oset jumper:
a) If the “input minimum” is greater than “output minimum” Set J2 to (-). Skip to 12.
b) If the “input minimum” is less than “output minimum” Set J2 to (+). Skip to 12.
c) If the “input minimum” is equal to “output min” Leave J2 alone and skip to step 12.
12. Supply the “input minimum” signal or equivalent to the input. Adjust the oset trim pot until the output reads
the same as “output minimum”.
13. Is signal reverse acting? If not skip to step 14. If yes, refer to following:
a) Set J1 to R.
b) Supply “input minimum”, or equivalent, and adjust the Rev trim pot until reading is equal to output
maximum.
14. If the output is current. Set J3 (out) to I and reset meter to current. (Vout / 250 = mA).
15. Check the low, mid-scale and high signal points to check output for proper calibration. Fine calibration
adjustments may now be made.

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Version: 3.0
I0000470
ARM CALIBRATION WORK SHEET : Fill in and circle answers.
1. Input: minimum______maximum______ mA or VDC, Output: minimum______maximum______ mA or
VDC
2. Is the input VDC? Yes/No. Is the output VDC? Yes/No
a) If yes to both, set jumper J3 (IN/OUT) to E and skip to step 5.
b) If no to both, set jumper J3 (IN/OUT) to I and skip to step 5.
c) If yes to only one, continue to step 3.
3. Is current the input signal? If no, skip to step 4. If yes, perform the following:
a) Set J3 (IN) to I and (OUT) to E.
b) Multiply input minimum by 250 and enter value in “Input minimum” in step 5a.
c) Multipy input maximum by 250 and enter value in “Input maximum” in step 5a.
Example : minimum=4mA = .004 x 250 = 1 VDC and maximum=20mA = .020 x 250 = 5 VDC.
4. Is voltage the input signal. If no, skip to step 5. If yes,
a) Set J3 (IN/OUT) to E. Output jumper will be changed to I in later steps.
b) Multiply output minimum by 250 and enter value in “Output minimum” in step 5b,
c) Multiply maximum by 250 and enter value in “Output maximum” in step 5b.
Example : minimum 4mA = .004 x 250 = 1 VDC and maximum 20mA = .020 x 250 = 5 VDC.
5. Enter mA, VDC or equivalent values below. Note: Do not mix voltage and current.
a) Input minimum______ Input maximum______ maximum-minimum = Input span______
b) Output minimum______ Output maximum______ maximum-minimum = Output span______
6. Preset trimpots: 25 Turns until it clicks.
25 Turns Clockwise - Gain, Fine, Oset and Reverse
25 Turns Counter clockwise – Attenuation
7. Make all connections including signal generator and multimeter. Apply power (24 VAC or VDC).
8. Set jumpers J2 to 0 and J1 to N
9. First test: input a 50% signal. Is the input equal to or close to the output?
If yes, proceed to step 10.
If no, return to step 7.
Note: Min, max and span values are found in step 5.
10. Supply the “input span” signal or equivalent to the input. (Refer to step 5).
a) If the “input span” is less than “output span”, turn the gain or ne trim pot until the output is equal
to the “output span” signal.
b) If the “input span” is greater than “output span”, turn the attenuation trim pot until the
output is equal to the “output span” signal.
11. Setting the oset jumper:
a) If the “input minimum” is greater than “output minimum” Set J2 to (-). Skip to 12.
b) If the “input minimum” is less than “output minimum” Set J2 to (+). Skip to 12.
c) If the “input minimum” is equal to “output min” Leave J2 alone and skip to step 12.
12. Supply the “input minimum” signal or equivalent to the input. Adjust the oset trim pot until the output reads
the same as “output minimum”.
13. Is signal reverse acting? If not skip to step 14. If yes, refer to following:
a) Set J1 to R.
b) Supply “input minimum”, or equivalent, and adjust the Rev trim pot until reading is equal to output
maximum.
14. If the output is current. Set J3 (out) to I and reset meter to current. (Vout / 250 = mA).
15. Check the low, mid-scale and high signal points to check output for proper calibration. Fine calibration
adjustments may now be made.
Page 6

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
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Version: 3.0
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PRODUCT SPECIFICATIONS
WARRANTY
The ARM Series is covered by ACI’s Two (2) Year Limited Warranty, which is located in the front of ACI’S SENSORS &
TRANSMITTERS CATALOG or can be found on ACI’s website: www.workaci.com.
W.E.E.E. DIRECTIVE
At the end of their useful life the packaging and product should be disposed of via a suitable recycling
centre. Do not dispose of with household waste. Do not burn.
Page 6
24 VAC or 24VDC, (+/- 10%), 50/60 Hz
200 mA maximum
0 to 35 VDC @ 1M
0-44 mA @ 250
0 to 500,000
Multi-turn potentiometers
0.25 VDC minimum to 20 VDC maximum
44 mA maximum, Signal Gain 1 to 25 times (nominal) depending on input value
+/- 1%
0 to 100%
0.25 to 20 VDC
20 to 0.25 VDC (nominal)
750 @ 20 mA
3300 @ 20 VDC +/- 10% / 400 @ 10 VDC +/- 10%
20 VDC +/- 10%, 30 mA maximum
45° Captive screw Terminal Blocks
12 (3.31 mm) to 22 AWG (0.33 mm)
0.5 Nm (Minimum); 0.6 Nm (Maximum)
35 to 120°F (1.7 to 48.9°C)
10 to 95% non-condensing
-20 to 150°F (-28.9 to 65.5°C)
Polyvinyl Chloride (PVC)
UL94 V-0
RoHS2, WEEE
NON-SPECIFIC INFORMATION
Supply Voltage:
Supply Current:
Input Voltage Signal Range (@
Impedance):
Input Current Signal Range (@
Impedance):
Input Resistance Signal Range:
Field Adjustable Ranges:
Output Voltage Signal Range:
Output Current Signal Range:
Output Accuracy:
Output Signal Attenuation:
Output Signal Oset:
Output Signal Inversion (RA):
Output Current Load Impedance:
Output Voltage Load Impedance:
Regulated Power Output:
Connections:
Wire Size:
Terminal Block Torque Rating:
Operating Temperature Range:
Operating Humidity Range:
Storage Temperature:
Snaptrack Material:
Snaptrack Flammability Rating:
Agency Approvals:

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Automation Components, Inc.
2305 Pleasant View Road
Middleton, WI 53562
Phone: [phone]
Website: workaci.com
Page 8
Version: 3.0
I0000470