Allen-Bradley Duct Average Temperature Transmitter Installation Instructions
The Allen-Bradley Duct Average Temperature Transmitter is a reliable solution for monitoring average temperatures in HVAC systems. It utilizes multiple precision RTD sensors along a soft copper or stainless steel probe to provide accurate, fast, and stable temperature readings. This transmitter is suitable for a wide range of applications and installation environments, offering enhanced accuracy and durability.
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Installation Instructions
Duct Average-temperature
Transmitter
Catalog Numbers 1414-ITX03ACDAA, 1414-ITX02ACDAA, 1414-CTQ03AIEAA,
1414-CTX03PCDAA
About the Duct Average-temperature Transmitter
The multi-point duct average-temperature transmitter incorporates numerous precision RTD
sensors at equal distances. The transmitter is encapsulated in a soft copper probe for long lengths
or a stainless steel probe for shorter lengths. All probes provide excellent heat transfer, fast
response, and moisture-penetration resistance. The transmitter provides a high accuracy signal
with excellent long term stability, low hysteresis, and fast response.
Topic Page
About the Duct Average-temperature Transmitter 1
Important User Information 2
Mount the Duct Average-temperature Transmitter 3
Wire and Connect the Duct Average-temperature
Transmitter
3
Field Calibration 4
Specifications 5
Dimensions 6
Duct Average-temperature
Transmitter
Catalog Numbers 1414-ITX03ACDAA, 1414-ITX02ACDAA, 1414-CTQ03AIEAA,
1414-CTX03PCDAA
About the Duct Average-temperature Transmitter
The multi-point duct average-temperature transmitter incorporates numerous precision RTD
sensors at equal distances. The transmitter is encapsulated in a soft copper probe for long lengths
or a stainless steel probe for shorter lengths. All probes provide excellent heat transfer, fast
response, and moisture-penetration resistance. The transmitter provides a high accuracy signal
with excellent long term stability, low hysteresis, and fast response.
Topic Page
About the Duct Average-temperature Transmitter 1
Important User Information 2
Mount the Duct Average-temperature Transmitter 3
Wire and Connect the Duct Average-temperature
Transmitter
3
Field Calibration 4
Specifications 5
Dimensions 6
2 Duct Average-temperature Transmitter
Publication 1414-IN004B-EN-P - July 2010
Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical equipment.
Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1
available from your local Rockwell Automation sales office or online at
http://www.rockwellautomation.com/literature/) describes some important differences between solid-state
equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide
variety of uses for solid-state equipment, all persons responsible for applying this equipment must satisfy
themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many
variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot
assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or death, property
damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal
injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid
a hazard and recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, drive or motor, to
alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, drive or motor, to
alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of the
product.
Publication 1414-IN004B-EN-P - July 2010
Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical equipment.
Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1
available from your local Rockwell Automation sales office or online at
http://www.rockwellautomation.com/literature/) describes some important differences between solid-state
equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide
variety of uses for solid-state equipment, all persons responsible for applying this equipment must satisfy
themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many
variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot
assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or death, property
damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal
injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid
a hazard and recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, drive or motor, to
alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, drive or motor, to
alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of the
product.
Duct Average-temperature Transmitter 3
Publication 1414-IN004B-EN-P - July 2010
Mount the Duct Average-temperature Transmitter
Follow these steps to mount the transmitter.
1. Install the duct average sensors onto hangers in the duct using supplied clamps.
Located the sensors in a straight section of duct away from heating, cooling, or
humidifier elements.
The duct average sensor can be easily shaped to fit any duct size, but observe a minimum
bend radius of six inches to prevent damage to wires or sensors. Duct average elements
are not recommended for high humidity applications.
2. Mounted the duct average temperature transmitter enclosure to the outside of the duct,
where the sensor tubing exits the duct, by using sheet metal screws (not supplied).
Wire and Connect the Duct Average-temperature Transmitter
Follow these steps to wire and connect the transmitter.
1. Connect the transmitter to the controller by using twisted 18…22 AWG wire.
The transmitter requires two wires for DC 4…20 mA loop-powered operation. The use
of shielded cable is optional, but recommended for the highest noise immunity.
2. Select the controller Analog Input (AI) to match the transmitter output before power is
applied.
The AI type must be a current input with 250 or 500 ohm impedance. All transmitters
have an operating range of 0…70 °C (32…158 °F). The transmitter board should not be
mounted where temperatures exceed these values. See the connection diagram for more
details.
IMPORTANT Do not route signal wires in the same conduit with power cables as signal
degradation may occur.
Note: 6" Bend
Radius
Placement of a 12 ft Duct Average
Sensor in a 48 in. Square Duct
Use Hangers to Secure
Duct Average
Sensors
Publication 1414-IN004B-EN-P - July 2010
Mount the Duct Average-temperature Transmitter
Follow these steps to mount the transmitter.
1. Install the duct average sensors onto hangers in the duct using supplied clamps.
Located the sensors in a straight section of duct away from heating, cooling, or
humidifier elements.
The duct average sensor can be easily shaped to fit any duct size, but observe a minimum
bend radius of six inches to prevent damage to wires or sensors. Duct average elements
are not recommended for high humidity applications.
2. Mounted the duct average temperature transmitter enclosure to the outside of the duct,
where the sensor tubing exits the duct, by using sheet metal screws (not supplied).
Wire and Connect the Duct Average-temperature Transmitter
Follow these steps to wire and connect the transmitter.
1. Connect the transmitter to the controller by using twisted 18…22 AWG wire.
The transmitter requires two wires for DC 4…20 mA loop-powered operation. The use
of shielded cable is optional, but recommended for the highest noise immunity.
2. Select the controller Analog Input (AI) to match the transmitter output before power is
applied.
The AI type must be a current input with 250 or 500 ohm impedance. All transmitters
have an operating range of 0…70 °C (32…158 °F). The transmitter board should not be
mounted where temperatures exceed these values. See the connection diagram for more
details.
IMPORTANT Do not route signal wires in the same conduit with power cables as signal
degradation may occur.
Note: 6" Bend
Radius
Placement of a 12 ft Duct Average
Sensor in a 48 in. Square Duct
Use Hangers to Secure
Duct Average
Sensors
4 Duct Average-temperature Transmitter
Publication 1414-IN004B-EN-P - July 2010
Typical wiring to a controller is shown in the diagram. For 4…20 mA loop signal, only
the PWR and OUT terminals are used.
Field Calibration
The unit can be calibrated in the field by using precision resistor values equal to the zero and
span of the transmitter temperature range.
1. Disconnect the sensor from the transmitter and connect the resistor that represents the
zero value to the EXC and NEG terminals.
2. Adjust the ZERO pot until the desired output is achieved.
3. Connect the resistor that represents the span value to the EXC and NEG terminals.
4. Adjust the SPAN pot until the desired output is achieved.
Repeat these steps until no further adjustment is required.
TIP If the unit uses a three-wire sensor, a jumper must be placed between EXC and
SEN.
NEG
EXC
SEN
P WR
C O M
O U T
SPAN
ZERO
+ 24V DC -
ANL IN 0 +
ANL IN 0 -
Analog Current Input
ANL COM
Loop Power Supply
2-wire RTD
Sensor
Temperature Transmitter
Publication 1414-IN004B-EN-P - July 2010
Typical wiring to a controller is shown in the diagram. For 4…20 mA loop signal, only
the PWR and OUT terminals are used.
Field Calibration
The unit can be calibrated in the field by using precision resistor values equal to the zero and
span of the transmitter temperature range.
1. Disconnect the sensor from the transmitter and connect the resistor that represents the
zero value to the EXC and NEG terminals.
2. Adjust the ZERO pot until the desired output is achieved.
3. Connect the resistor that represents the span value to the EXC and NEG terminals.
4. Adjust the SPAN pot until the desired output is achieved.
Repeat these steps until no further adjustment is required.
TIP If the unit uses a three-wire sensor, a jumper must be placed between EXC and
SEN.
NEG
EXC
SEN
P WR
C O M
O U T
SPAN
ZERO
+ 24V DC -
ANL IN 0 +
ANL IN 0 -
Analog Current Input
ANL COM
Loop Power Supply
2-wire RTD
Sensor
Temperature Transmitter
5
6
7
8
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Key Features
- Multi-point average temperature sensor
- Flexible copper or stainless steel probe
- 4-20 mA current loop output
- High accuracy & long term stability
- Easy field calibration
- Various probe lengths
- NEMA 1 or 3R enclosures
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Frequently Answers and Questions
What types of probes are available for the transmitter?
The transmitter is available with either a flexible copper tube or a stainless steel probe. The type of probe you need will depend on the application and the length required.
How do I calibrate the transmitter in the field?
You can calibrate the transmitter using precision resistor values equal to the zero and span of the desired temperature range.. The manual provides detailed instructions for this process.
What is the recommended wiring for the transmitter?
For loop-powered operation, use twisted 18-22 AWG wire. It's recommended to use shielded cable for improved noise immunity. Do not route signal wires in the same conduit with power cables to prevent signal degradation.
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