aci DUCT Series Installation instructions

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 1
Version: 1.0
I0000855
FIGURE 1: ENCLOSURE
DIMENSIONS
DUCT SERIES TEMPERATURE
TRANSMITTER
Installation & Operation Instructions
Phone: [phone]
Website: workaci.com
GENERAL INFORMATION
The ACI Duct Series sensors and transmitters are
single point sensors that output 4-20 mA with an
optional voltage signal output of 1-5VDC or
2-10VDC signal to BAS or controller. All ACI/TT and
TTM temperature transmitters can be powered
from either an unregulated or regulated 8.5 to 32
VDC power supply.
MOUNTING INSTRUCTIONS
For optimal temperature measurement, follow
these tips:
•Duct probe should be placed (3) to (4) duct
segments down from any bend or obstructions
and away from 90° bends.
•Mount the sensor on the top or sides of duct
work; mounting on the bottom risks damage
due to moisture.
•The sensor should be mounted in the middle of the
duct where air circulation is well mixed (no
stratication), and not blocked by obstructions.
Stratication and obstructions can cause sensing
errors. An example is downstream from a heating
or cooling coil.
Drill a 3/8” hole in the duct and insert the probe
through the hole until the foam pad is tight to the
duct. Drill pilot holes for the (2) mounting screws. Use
the enclosure ange as a guide, or use the
dimensions listed below to measure out.
Now fasten and insert (2) screws #8 x 3/4" TEK
(provided and recommended) through the
mounting holes in the ange and tighten until the
unit is held rmly to the duct. Make sure the foam
pad is tight to the duct to eliminate any possible
air leaks.
Note: All enclosures have the foam pad attached. For
the“DO”(no enclosure), the foam pad is included, but
not installed. The foam pad must be installed prior to
mounting.
WIRING INSTRUCTIONS
PRECAUTIONS
• Transmitter is powered by 24 VDC only.
• Remove power before wiring. NEVER connect or disconnect wiring with power applied.
• When removing the shield from the sensor end, make sure to properly trim the shield to prevent any
chance of shorting.
GALVANIZED (-GD)
PLASTIC BOX (-PB)
BELL BOX (-BB)
NEMA 4X (-4X)
3.60"
(91.44 mm)
2.25"
(57.15 mm)
4.79"
(121.55 mm)
2.35"
(59.80 mm)
4.20"
(106.68 mm)
3.88"
(98.60 mm)
2.41"
(61.21 mm) 1.78" (45.18 mm)
2.95"
(75.00 mm) 2.34" (59.38 mm)
4.72"
(119.83 mm)
3.88"
(98.60 mm) 2.19"
(55.69 mm)
2.55"
(64.77 mm)
3.70"
(93.980 mm)
1.51"
(38.25 mm) 3.01"
(76.51 mm)
1.54"
(39.12 mm)
3.08"
(78.23 mm)
1.59"
(40.39 mm)
3.18"
(80.77 mm)
1.54"
(39.12 mm)
3.08"
(78.23 mm)
VAC

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 2
Version: 1.0
I0000855
+VDC (Red Wire)
4 to 20mA Output
(White Wire)
RTD Wires
(100 Ohm RTD Brown Wires)
(1K Ohm RTD Black Wires)
+VDC (Red Wire)
GND (White Wire)
Voltage Output
(Yellow Wire)
(1 to 5, 2 to 10VDC)
RTD Wires
(100 Ohm RTD Brown Wires)
(1K Ohm RTD Black Wires)
Current Output
(4 to 20 mA)
Current Output
(4 to 20 mA)
Voltage Output
(1 to 5, 2 to 10VDC)
Voltage Output
(1 to 5, 2 to 10VDC)
+VDC
4 to 20mA Output
+VDC
GND
Voltage Output
(1 to 5, 2 to 10VDC)
+-GND VOUT
RTD
+-RTD
SPAN
ZERO
SPANZERO
SPAN
ZERO
SPANZERO
POTTED UNITS
STANDARD UNITS
FIGURE 4: WIRING DIAGRAMS
0.375"
(9.525 mm)
FIGURE 2: DUCT MOUNTING
WIRING INSTRUCTIONS
PRECAUTIONS
• When using a shielded cable, ground the
shieldONLYatthe controllerend. Grounding
both ends can cause a ground loop.
• If the 24 VDC power is shared with devices
that have coils such as relays, solenoids, or
other inductors, each coil must have an MOV,
DC 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
causemalfunctionordestructionofelectron-
ic circuits.
Open the cover of the enclosure. ACI recommends
16 to 26 AWG twisted pair wires or shielded cable
for all transmitters. Twisted pair may be used for
2-wire current output transmitters or 3-wire for
voltage output. Refer to FIGURE 4 (right) for wiring
diagrams. All wiring must comply with local and
National Electric Codes. All ACI TT and TTM
temperature transmitters can be powered from
either an unregulated or regulated 8.5 to 32VDC
power supply. The TT and TTM DO NOT support an
AC input. All TT and TTM temperature transmitters
are reverse polarity protected. After wiring, attach
the cover to the enclosure.
The minimum voltage at the transmitter power
terminal is 8.5V after load resistor voltage drop.
•249 Ω load resistor (1-5 VDC output) = 13.5 V min supply
voltage
•499 Ω load resistor (2-10 VDC output) = 18.5 V min
supply voltage
Note: Adding extra wire length between the
sensor and transmitter board may aect accuracy.
Note: All RTD’s are supplied with (2) or (3) ying lead wires. ACI’s transmitters are supplied with a 2 pole
terminal block for RTD sensor connections. When wiring a 3 wire RTD, connect the (2) common wires (same
color) together into the same terminal block.
FORMULA FOR NUMBER OF TRANSMITTERS
Several transmitters may be powered from the same supply as shown in FIGURE 6 (p. 3). Each transmitter draws
25mA; refer to the following equation to obtain the number of permissible transmitters: [# Transmitters] =
[Current] / (25 mA).

WARRANTY
The ACI Duct Series temperature sensors are covered by ACI’s Five (5) 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.
TROUBLESHOOTING
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 3
Version: 1.0
I0000855
FIGURE 5: MULTIPLE TRANSMITTER CONNECTIONS
P
ower Supply
+ -
+ -
+ -
Temp.Transmitter #1
Temp.Transmitter #N
Temp.Transmitter #2
- VDC +
Controller
Gnd In1 In2 In3
= Connections
I
n1 = Controller Input #1
I
n2 = Controller Input #2
I
n3 = Controller Input #3
TEMPERATURE PROBLEM
No Reading
•No power to board - check voltage at power terminal - should be between +8.5 and 32 VDC.
Reading too Low
•RTD wires shorted. Disconnect wies from terminal block and check with ohmmeter. Reading should be close to 100 Ωor 1 KΩ.
•RTD Improper range of transmitter (too low). Check current or voltage - should be between 4-20 mA, 1-5 V, or 2-10 V.
Reading too High
•RTD opened. Disconnect sensor wires from terminal block and check with ohmmeter. Reading should be close to 100 Ωor 1 KΩ.
•Improper range of transmitter (too high). Check current or voltage - should be between 4-20 mA, 1-5 V, or 2-10 V.
Reading is Inaccurate
•Sensor check: Disconnect sensor wires from terminal block and check with ohmmeter. Compare the resistance reading
to the Temperature vs Resistance curves located on ACI’s website.
•Transmitter check: Make sure sensor wires are connected to terminal block. Determine that the proper output is being
transmitted based on predetermined span:
1. Go to ACI Website, Span to Output Page: http://www.workaci.com/content/span-output
2. Enter the low end of the span
3. Enter the high end of the span
4. Click on the output of the transmitter. This will generate a span to output chart.
5. Measure output of transmitter.
6. Compare measured output to calculated output

PRODUCT SPECIFICATIONS
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 4
Version: 1.0
I0000855
Note: Transmitter’s calibrated at 71ºF (22ºC) nominal | Note: Thermal Drift is referenced to 71ºF (22ºC) nominal calibration temperature
SENSOR NON-SPECIFIC
Storage Temperature Range:
Operating Humidity Range:
Lead Length | Conductor Size:
Lead Wire Insulation | Wire Rating:
Conductor Material:
Enclosure Specifications: (Operating
Temperature, Material, Flammability,
NEMA/IP Ratings):
SENSOR
Sensor Type | Sensor Curve | Sensing Points:
Sensor Output @ 0°C (32°F):
RTD Tolerance Class | Accuracy:
Din Standard | Temperature Coefficient:
Sensor Stability:
Response Time (63% Step Change):
Sensor Operating Temperature Range:
Probe Diameter | Probe Material:
TRANSMITTER
Transmitter Supply Voltage |
Supply Current:
Maximum Load Resistance:
Output Signals:
Calibrated Accuracy | Linearity1:
Thermal Drift2:
Min./Max. CalibratedTemperature Spans:
TTM100/TTM1K Certification Points:
Warm Up Time | Warm Up Drift:
Transmitter Operating Temperature Range:
Transmitter Operating Humidity Range:
Connections | Wire Size:
Terminal Block Torque Rating:
-40 to 80 °C (-40 to 176 °F)
10 to 90% RH, non-condensing
14” (35.6 cm) | 22 AWG (0.65mm)
Etched Teon (PTFE) Colored Leads | Mil Spec 16878/4 Type E
Silver Plated Copper
“-GD” : Galvanized Steel, -40 to 121 °C (-40 to 250 °F), NEMA 1 (IP10)
“-PB” : ABS Plastic, -30 to 90 °C (-22 to 194 °F), UL94-HB, Plenum Rated
“-BB” : Aluminum, -40 to 121 °C (-40 to 250 °F), NEMA 3R (IP 14)
“-4X”: Polystyrene Plastic, -40 to 70 °C (-40 to 158 °F), UL94-V2, NEMA 4X (IP 66)
Platinum RTD | PTC (Positive Temperature Coecient) | One
A/TT100/TTM100: 100 Ωnominal | A/TT1K/TTM1K: 1 KΩ nominal
+/- 0.06% Class A | (Tolerance Formula: +/- ºC = (0.15 °C + (0.002 * |t|))
where |t| is the absolute value of temperature above or below 0 °C in °C)
DIN EN 60751 (IEC 751) | 3850 ppm / °C
+/- 0.03% after 1000 Hours @ 300 °C (572 °F)
8 Seconds nominal
-40 to 200 °C (-40 to 392 °F)
0.250” (6.35mm) | 304 Stainless Steel
+8.5 to 32 VDC (Reverse Polarity Protected) | 25 mA minimum
250 ΩLoad: +13.5 to 32 VDC | 500 ΩLoad: +18.5 to 32 VDC
(Terminal Voltage - 8.5 V) | 0.020 A
Current: 4-20 mA (2-Wire) | Voltage: 1-5 VDC or 2-10 VDC (3-Wires)
T. Spans < 500 °F (260 °C): +/- 0.2%
T. Spans < 100 °F (38 °C): +/- 0.04%/ °F | T. Spans > 100 °F (38 °C): +/- 0.02%
Min. T. Span: 50 °F (28 °C) | Max T. Span: 400 °F (204 °C)
3 Pt. NIST: 20, 50, & 80% of span | 5 Pt. NIST: 0, 20, 50, 80, & 100% of span
10 Minutes | +/- 0.1%
-40 to 185 °F (-40 to 85 °C)
0 to 90%, non-condensing
Screw Terminal Blocks | 16 AWG (1.31 mm2) to 26 AWG (0.129 mm2)
0.37 ft-lb (0.5 Nm ) nominal