Azbil HY7045T1000 User manual

1
Specifications/Instructions
AB-7521
Room Humidity Sensor
Room Temperature/Humidity Sensor
Overview
This product is an electronic room sensor.
It is attached to the wall in the room to measure the
relative humidity and temperature.
The humidity sensor (Model HY7045T1000)
and temperature/humidity sensor (Model
HTY7045T1100, HTY7045T1P00) are available.
This product is a highly accurate and reliable sensor
using a resistance temperature detector (Pt100)
as temperature sensing element and a polymer
capacitive humidity detector as humidity sensing
element developed by Azbil Corporation.
With a wide measurement range and excellent
stability, it can be applied to various indoor
applications including air conditioning for general
buildings.
Features
•Wide temperature and/or humidity sensing range
with high accuracy
•Excellent long-term stability
•High environmental resistance
•Quick response and high repeatability
•Compact (thin) and lightweight
IMPORTANT •The measuring accuracy of this product
is the value when it is shipped from the
factory.
Even if it is used in normal air, the output
may be shifted depending on the operating
environment. Periodical inspection is
recommended.
•Corrosive gases or organic solvents may
cause shift in humidity output or damage
the product.
if the product is used in an environment
different from the ordinary air, please
contact Azbil Corporation.
© 2019–2020 Azbil Corporation. All Rights Reserved.

2
AB-7521
Safety Precautions
Please read instructions carefully and use the product
as specified in this manual.
Be sure to keep this manual nearby for quick
reference.
Restrictions on Use
This product was developed, designed, and
manufactured for general air conditioning use.
Do not use the product in a situation where human
life may be at risk or for nuclear applications in
radiation controlled areas. If you wish to use the
product in a radiation controlled area, please
contact Azbil Corporation.
Particularly when the product is used in the
following applications where safety is required,
implementation of fail-safe design, redundant
design, regular maintenance, etc., should be
considered in order to use the product safely and
reliably.
• Safety devices for protecting the human body
• Start/stop control devices for transportation
machines
• Aeronautical/aerospace machines
For system design, application design, instructions
for use, or product applications, please contact
Azbil Corporation.
Azbil Corporation bears no responsibility for any
result, or lack of result, deriving from the customer's
use of the product.
Recommended Design Life
It is recommended that this product be used within
the recommended design life.
The recommended design life is the period during
which you can use the product safely and reliably
based on the design specifications.
If the product is used beyond this period, its failure
ratio may increase due to time-related deterioration
of parts, etc.
The recommended design life during which the
product can operate reliably with the lowest
failure ratio and least deterioration over time is
estimated scientifically based on acceleration tests,
endurance tests, etc., taking into consideration the
operating environment, conditions, and frequency
of use as basic parameters.
The recommended design life of this product is
shown in the following table.
The recommended design life assumes that
maintenance, such as replacement of the limited
life parts, is carried out properly.
For maintenance, refer to ■“Maintenance”in
this manual.
Product Recommended
design life
Room humidity sensor
Room temperature/humidity sensor
8 years
Warnings and Cautions
WARNING
Alerts users that improper
handling may cause death or
serious injury.
CAUTION Alerts users that improper
handling may cause minor injury
or material loss.
Signs

Electric shock
Alerts users to possible hazardous
conditions caused by erroneous
operation or erroneous use. The
symbol inside  indicates the specic
type of danger. (For example, the sign
on the left warns of the risk of electric
shock.)

Disassemble
Noties users that specic actions are
prohibited to prevent possible danger.
The symbol inside graphically
indicates the prohibited action. (For
example, the sign on the left means
that disassembly is prohibited.)

General
Instructs users to carry out a specific
obligatory action to prevent possible
danger. The symbol inside 
graphically indicates the actual action
to be carried out. (For example, the
sign on the left indicates general
instructions.)
 WARNING

Electric shock
Before wiring or maintenance, be sure
to turn o󰀨 the power to this product.
Failure to do so may result in electric
shock or device failure.

3
AB-7521
 CAUTION

General
Use this product under the operating
conditions (for temperature, humidity,
power, vibration, shock, mounting
location, atmosphere, etc.) listed in the
specications.
Failure to do so may cause fire or
device failure.

General
Take anti-lightning surge measures
based on regional and building
characteristics.
Lightning may cause fire or critical
damage to this product if protective
measures are not taken.

General
Provide a power circuit breaker for the
power source to this product.
The product does not have a power
switch.

General
For the sake of safety, installation and
wiring must be performed by qualified
personnel in accordance with all
applicable safety standards.
Failure to do so may cause fire or
electric shock.

Prohibition
Do not put a load or weight on this
product.
Doing so may damage the product.

General
All wiring must comply with applicable
codes and ordinances.
Otherwise there is a danger of re.
 CAUTION

Prohibition
Do not disassemble or modify this
product.
Doing so may cause device failure or
electric shock.

General
If more than the rated power voltage
is accidentally applied to this product,
replace the product with a new one for
your safety.
Failure to do so may cause device
failure or cause overheat.

General
After wiring, attach the cover.
Failure to do so may result in electric
shock or device failure.

General
To connect the wires to the product,
use crimp terminal lugs with insulation.
Failure to do so may cause short circuit
leading to re or device failure.

General
When installing the product, be sure to
connect the wires securely. Failure to
do so may result in measurement error
or cause overheating or device failure.
IMPORTANT •Do not use transceivers or low-power
wireless devices near this product.
Doing so may cause radio wave
interference and malfunction of the
product.

4
AB-7521
Model Numbers
zRoom humidity sensor
Model number Power supply Humidity output Temperature
output
Output wire
connection Company logo
HY7045T1000 24 V DC/AC
common
1–5 V – – – – – Lead wire output Yes
HY7045T1000-1 No
zRoom temperature/humidity sensor
Model number Power supply Humidity output Temperature
output
Output wire
connection Company logo
HTY7045T1100 24 V DC/AC
common
1–5 V 1–5 V Lead wire output Yes
HTY7045T1100-1 No
HTY7045T1P00 RTD
(Pt100)
Yes
HTY7045T1P00-1 No
RTD: resistance temperature detector
Accessories
This product consists of the cover and main unit.
The following items are shipped with this product.
•Main unit mounting screws (M3 at-head screw, L = 16 mm) : 4 pcs
•AI-7545JE, Room Humidity Sensor (Model HY7045) Room Temperature/Humidity Sensor (Model
HTY7045) Installation Instructions: 1 pc
Main unit
4 main unit mounting screws
Cover

5
AB-7521
zOptional parts
This product is used with the dedicated mounting kit (optional parts) , auxiliary devices, etc.
Dedicated mounting kits
Model number Item Contents
83165803-001 Wall-direct
mounting kit
Mounting plate
2 pan-head screws
(M4, L = 8)
Main unit of
Wall-direct
mounting kit
1 flat-head screw
(M3, L = 16)
Wall-direct mounting kit:
1 pc
Mounting plate: 1 pc
Screws supplied with the
product
M4 pan-head screws,
L = 8: 2 pcs
M3 at-head screw,
L = 16: 1 pc
83165803-011 Thermoplate
mounting kit
Main unit of Thermoplate
mounting kit
2 tapping screws
(M2.6, L = 8)
Thermoplate mounting
kit: 1 pc
Screws supplied with the
product
M2.6 tapping screws,
L = 8: 2 pcs
83165803-021 Multi-thermocase
mounting kit
Main unit of
Multi-thermocase
mounting kit
Mounting screws are
included in the Multi-
thermocase (optional
parts) .
Auxiliary devices
Model number Item Remarks
QY1100C Thermoplate for individual
room control
Rotary switch
QY1100D
DY2000A1022 Thermoplate For 1 sensor, lengthwise
DY2000A1023 For 1 sensor, crosswise
DY2000A2023 For 2 sensors, crosswise, mounting on the
outlet box
DY2000A2024 For 2 sensors, crosswise, mounting on the
switch box
DY2000A3022 For 3 sensors, crosswise
DY2000A1021 Thermoplate for open
wiring
For 1 sensor,
square
Thermoplate for open
wiring is used for open
wiring installation.
DY2000A2021 For 2 sensors,
crosswise
DY2000A3021 For 3 sensors,
crosswise
TY1100Z Multi-thermocase —
83104506-020 Safe keeping cover 10 pcs

6
AB-7521
Specications
zRoom humidity sensor
Item Specication
Measuring range 0–100 % RH
Measuring accuracy ± 3 % RH (20–80 % RH, 15–35 °C)
Output signal 1–5 V DC (linear characteristic for 0–100 % RH) , minimum 50 kΩ input
impedance of the controller in connection
Time constant 40 sec max. (at 0.15 m/s air velocity)
zRoom temperature/humidity sensor
Item Specication
Measuring
range
Temperature 0–50 °C
Humidity 0–100 % RH
Measuring
accuracy
Temperature RTD
(Pt100, 3-wire)
± 0.3 °C (0–50 °C)
Note: Applied current: 1 mA, air velocity: 0.15 m/s down ow
Voltage output
(1–5 V)
± 0.3 °C (15–35 °C)
± 0.4 °C (10–15 °C, 35–50 °C)
Note: Air velocity: 0.15 m/s down ow
Humidity ± 3 % RH (20–80 % RH, 15–35 °C)
Output
signal
Temperature RTD
(Pt100, 3-wire)
100 Ω / 0 °C RTD (Pt100) , conforming to JIS C 1604 Class A,
3-wire
Voltage output
(1–5 V)
1–5 V DC (linear characteristic for 0–50 °C) , minimum 50 kΩ input
impedance of the controller in connection
Humidity 1–5 V DC (linear characteristic for 0–100 % RH) , minimum 50 kΩ
input impedance of the controller in connection
Time
constant
Temperature 4.5 min max. (at 0.15 m/s air velocity)
Humidity 40 sec max. (at 0.15 m/s air velocity)
JIS: Japanese Industrial Standards

7
AB-7521
zCommon specications
Item Specication
Power supply 24 V AC, -15/+10 % (50/60 Hz)
24 V DC ±10 %
Power consumption 24 V AC: 1.0 VA max.
24 V DC: 200 mW max.
Insulation resistance 500 V DC, 20 MΩ min. (between case and terminals)
Withstand voltage When applying 500 V AC for 1 min, leakage current: 1 mA max.
(between case and terminals)
Environmental
conditions
Rated operating
conditions
Marginal operating
conditions
Transportation/
storage conditions
When
measuring
temperature
Ambient
temperature
0–50 °C 0–60 °C -20–70 °C
Ambient
humidity
0–100 % RH (without condensation) 5–95 % RH (without
condensation)
(60 °Ctd or less)
When
measuring
humidity
Ambient
temperature
15–35 °C 0–60 °C -20–70 °C
Ambient
humidity
20–80 % RH
(without
condensation)
0–100 % RH
(without
condensation)
5–95 % RH (without
condensation)
(60 °Ctd or less)
Vibration 1.96 m/s² max. (10–150 Hz) 9.8 m/s² max.
(10–150 Hz)
Air velocity 0.1–0.5 m/s 0–5 m/s -
Color Cover, base Pale gray (BN-85, Japan Paint Manufacturers Association in
2003)
Main materials Cover, base PC resin
Weight Approx. 110 g
Connection Lead wire (0.75 mm2, length 300 mm)

8
AB-7521
Dimensions
zMain unit
31
77
50.7
37.5
33.5
22
77
34
Figure 1. Main unit (mm)
zMain unit and Wall-direct mounting kit
Wall-direct
mounting kit
90
27.2
15
＊1
38.5
16.5
12.2
77
77 90
Mounting
surface
Figure 2. Dimensions when mounted on Wall-direct
mounting kit (mm)
80
Mounting hole
(
φ4.2)
Mounting screw
(M3)
Mounting
hole
80
8.2
4.2
66.7＊2
Figure 3. Surface of the mounting plate (mm)
zMain unit and Thermoplate mounting kit
Thermoplate
(optional parts)
77
77
41 24.7
77 77
Thermoplate
mounting kit
Mounting
surface
19
15＊1 9.7
Figure 4. Dimensions when mounted on the Thermoplate
mounting kit (mm)
Mounting hole
(
φ2.8)
8
49
22
Figure 5. Surface of Thermoplate mounting kit (mm)
*1 When installing, secure more than 15 mm clearance for
wiring between the back of the main unit and the wall.
*2 JIS outlet box and box cover are used, mounting dimen-
sion 66.7 mm (JIS C 8340 (1999))

9
AB-7521
zMain unit and Multi-thermocase mounting kit
The main unit shown below is one whose cover is
detached.
If it is mounted in the Multi-thermocase (optional
parts) , the cover of the main unit is not used.
Multi-thermocase
mounting kit
72.8
72.8
85
85
48
23
72.8 72.8
85
Figure 6. Dimensions when mounted in the Multi-thermocase
mounting kit (mm)
68
55
Mounting hole
(
φ3.4)
66.7
＊4
Figure 7. Surface of the Multi-thermocase mounting kit (mm)
*4 Mounting plate of the Multi-thermocase and mounting dimen-
sions
Installation
For installing the sensor, specialized skills such as
for instrumentation work, electrical work, etc. are
required. Persons with the specialized skills should
install the sensor reading this manual.
 CAUTION

General
Use this product under the operating
conditions (for temperature, humidity,
power, vibration, shock, mounting
location, atmosphere, etc.) listed in the
specications.
Failure to do so may cause fire or
device failure.
 CAUTION

General
For the sake of safety, installation and
wiring must be performed by qualified
personnel in accordance with all
applicable safety standards.
Failure to do so may cause fire or
electric shock.
zInstallation location
IMPORTANT •Installation location of the sensor
largely affects temperature/humidity
control.
Carefully select the location.
•If the sensor is used in the following
special environments, please contact
Azbil Corporation.
•In a chemical atmosphere such as an
organic solvent, the output value may
be shifted.
•Corrosive gas, organic solvent, and
other chemicals contained in the
atmosphere can cause measuring error
of the sensor, shorten its service life, or
damage it.
Install the sensor on a wall in the following
conditions.
•Representative temperature and humidity in the
room/zone can be measured (approx. 1.5 m
high above the oor) .
•Ambient air velocity is about 0.1–0.5 m/s.
•There is enough maintenance space left in front
of the sensor.
zProhibited installation location
Do not install the sensor on a wall in the following
conditions.
•Heat (generated by o󰀩ce device or equipment,
for example) stays on.
•Air circulation is interfered (by furniture or door,
for example) .
•Temperature and/or humidity sensing is a󰀨ected
by draft, downdraft, and hot/cold air from water
pipes/ducts.
•Sensing is affected by weather conditions
(including sunlight and outdoor air) .
•There is vibration.
•Dew condensation occurs in the sensor.
•Water drops on the sensor.

10
AB-7521
•Corrosive gas, organic solvent, or other
chemicals is contained in the atmosphere.
•Chemicals or oils adhere.
When they adhered, wipe them immediately with
a dry soft cloth.
If chemicals or oils remain on the case, chemical
cracks may be made on it.
•Do not install the sensor outdoors or in a duct.
•Do not horizontally install the sensor directly on
a ceiling surface.
zNotes for installation
IMPORTANT •Do not touch the temperature and humidity
sensing elements on the PCB assembly
(Fig. 8) when removing/attaching the
cover and when installing the main unit.
Measuring accuracy may drop.
Temperature sensing
element
Humidity sensing
element
Note: The temperature/humidity sensor is illustrated as an
example.
For the humidity sensor, only the humidity sensing ele-
ment is a󰀨ected.
Figure 8. Temperature/humidity sensing elements
•Use the dedicated mounting kit (optional parts)
suitable for your application.
•Do not allow any refuse such as an electric wire
scrap to get inside the sensor.
•Do not get a cable caught between the sensor
and the mounting surface.
•When attaching the cover, carefully handle the
sensor not to damage the temperature/humidity
sensing elements.
•Be aware that if the sensor is horizontally
installed not only on the ceiling surface, su󰀩cient
ambient air velocity may not be obtained.
•If air inltrates to the rear side of the sensor from
the inside of the installed wall through the outlet
box, shut o󰀨 the air by sealing the outlet box.
•After installation, leave the sensor well so that
it adapts to ambient conditions (atmospheric
environment) .
zInstallation procedure
There are several methods for installing the sensor,
Wall-direct mounting, Thermoplate for open wiring
mounting,Thermoplate mounting, and Multi-
thermocase mounting.
Wall-direct mounting
(1) Attach the mounting plate of Wall-direct
mounting kit to the outlet box cover (JIS
C8340:1999, mounting dimension for outlet box
66.7 mm) on the mounting surface.
Use the 2 screws (M4, pan-head, L = 8)
supplied with the sensor.
Mounting box cover
JIS C8340, mounting
dimension 66.7 mm
(commercially available)
66.7mm
Wires from the load
Mounting plate
2 pan-head screws
(M4, L = 8)
66.7mm
(2) Attach the main unit of the Wall-direct mounting
kit to the mounting plate.
Use the 1 screw (M3, flat-head, L = 16)
supplied with the sensor.
Mounting plate
Main unit of
Wall-direct
mounting kit
1 flat-head screw
(M3, L = 16)
Mounting plate
Main unit of
Wall-direct
mounting kit
Rear
surface
(3) Connect the lead wires of the main unit and the
wires from the load.
Refer to Figs. 17 and 18 in ■ “Wiring.”
(4) Detach the cover of the main unit.
Push the spring, located inside the top of the
main unit, using a thin rod to remove the cover.
Main unit of Wall-direct
mounting kit
Cover
Push the spring.

11
AB-7521
IMPORTANT •Do not touch the temperature and humidity
sensing elements on the PCB assembly
(Fig. 8) when removing/attaching the
cover and when installing the main
unit.
Measuring accuracy may drop.
(5) Set the depth change levers on the both sides
of the main unit to the upper position (indicated
with "L") .
Main unit of
Wall-direct
mounting kit
Main unit
Depth change levers
(located at the upper
position, indicated
with "L")
(6) Attach the main unit to the main unit of the
Wall-direct mounting kit.
Use the 4 screws (M3, flat-head, L = 16)
supplied with the sensor.
Output lead wires
4 flat-head screws
(M3, L = 16)
Main unit
(7) Attach the cover back to the main unit.
Engage the tabs (x2) located on the lower part
of the cover with the slots (x2) on the lower
part of the main unit. Then x the cover with the
spring, located on the top of the main unit of the
sensor.
Main unit of
Wall-direct mounting kit
Tabs of the cover (x2)
Cover
Thermoplate for open wiring mounting
(1) Attach the mounting plate to Thermoplate for
open wiring.
Thermoplate for open
wiring (optional parts)
66.7mm
Wires from the load
Mounting plate
2 pan-head screws
(M4, L = 8)
(2) Attach the main unit of the Wall-direct mounting
kit to the mounting plate.
Mounting plate
Main unit of
Wall-direct
mounting kit
1 flat-head screws
(M3, L = 16)
Mounting plate
Main unit of
Wall-direct
mounting kit
Rear
surface
(3) Connect the lead wires of the main unit and the
wires from the load.
Refer to Figs. 17 and 18 in ■ “Wiring.”
(4) Detach the cover of the main unit.
Refer to step (4) in Wall-direct mounting.
(5) Set the depth change levers on the both sides
of the main unit to the upper position (indicated
with "L") .
Refer to step (4) in Wall-direct mounting.
(6) Attach the main unit to the main unit of the
Wall-direct mounting kit.
Use the 4 screws (M3, flat-head, L = 16)
supplied with the sensor. Refer to step (6) in
Wall-direct mounting.
(7) Attach the cover back to the main unit.
Refer to step (7) in Wall-direct mounting.

12
AB-7521
Thermoplate mounting
(1) Attach the mounting plate of Thermoplate to the
outlet box cover (JIS C8340:1999, mounting
dimension for switch box 83.5 mm) on the
mounting surface.
83.5mm
Mounting box cover
JIS C8340, mounting
dimension 83.5 mm
(commercially available)
Wires from the load
Mounting plate
2 pan-head screws
(M4, L = 8)
(2) Attach the Thermoplate to the mounting plate.
Mounting plate
Thermoplate
2 pan-head screws
(M4, L = 8)
(3) Attach the main unit of the Thermoplate
mounting kit to the Thermoplate.
Thermoplate
Main unit of
Thermoplate
mounting kit
2 tapping screws
(M2.6, L = 8)
(4) Connect the lead wires of the main unit and the
wires from the load.
Refer to Figs. 17 and 18 in ■ “Wiring.”
(5) Detach the cover of the main unit.
Refer to step (4) in Wall-direct mounting.
(6) Set the depth change levers on the both sides
of the main unit to the upper position (indicated
with "L") .
Main unit of
Wall-direct
mounting kit
Main unit
Depth change levers
(located at the upper
position, indicated
with "L")
(7) Attach the main unit to the Thermoplate
mounting kit.
Use the 4 screws (M3, flat-head, L = 16)
supplied with the sensor.
4 flat-head screws (M3, L = 16)
Main unit
Output lead wires
Main unit of Thermoplate mounting kit
(8) Attach the cover back to the main unit.
Refer to step (7) in Wall-direct mounting.
Multi-thermocase mounting
When attached to the Multi-thermocase, remove
the cover of the main unit.
Mounting plate of
Multi-thermocase
Figure 9. Multi-thermocase

13
AB-7521
(1) Attach the main unit of the Multi-thermocase
mounting kit to the mounting plate of the Multi-
thermocase.
Mounting plate of Multi-thermocase
Main unit of
Multi-thermocase
mounting kit
2 pan-head screws
(M3, L = 6) of Multi-thermocase
Wires from
the load
66.7mm
Multi-thermocase
mounting kit (optional parts)
(2) Connect the lead wires of the main unit and the
wires from the load.
Refer to Figs. 17 and 18 in ■ “Wiring.”
(3) Detach the cover of the main unit.
Refer to step (4) in Wall-direct mounting.
(4) Set the depth change levers on the both sides
of the main unit to the lower position (indicated
with "H”) .
IMPORTANT •When attaching to the Multi-thermocase,
set the depth change levers on the both
sides of the main unit to the lower position
(indicated with "H”) .
Depth change levers
(lower position,
indicated with "H")
(5) Attach the main unit to the Multi-thermocase
mounting kit.
Use the 4 screws (M3, flat-head, L = 16)
supplied with the sensor.
zProtection form heat radiation, heat
conduction, etc.
To protect the measuring accuracy from
disturbances, change the the position (height)
of the temperature/humidity sensing elements as
described below.
(1) Remove 4 mounting screws of the sensor.
Main unit of Wall-direct
mounting kit
Main unit
Mounting
screws
Figure 10
(2) Raise the main unit from the Wall-direct
mounting kit. 9 mm max. can be raised.
Main unit
Main unit of Wall-direct
mounting kit
Figure 11
(3) Set the depth change levers down, located on
the both sides on the main unit.
Note: The levers are factory-set at the upper "L" position.
Depth change levers
(upper position,
indicated with "L")
Depth change levers
(lower position,
indicated with "H")
(4) Attach the main unit to the main unit of the Wall-
direct mounting kit with the 4 mounting screws.
Main unit of Wall-direct
mounting kit
Main unit
4 mounting
screws
Figure 12

14
AB-7521
The main unit should protrude from the wall as
shown in Figure 13.
Notes:
•  E󰀨ect of the countermeasure for disturbances varies de-
pending on its environment installed.
•  Also in the case of Thermoplate mounting, install the sensor
in the same procedure.
Wall surface
Wall surface
38.5 47.5
9 (Raised)
Figure 13
Wiring
For wiring the sensor, specialized skills such as
for instrumentation work, electrical work, etc. are
required. Persons with the specialized skills should
install the sensor reading this manual..
 WARNING

Electric shock
Before wiring or maintenance, be sure
to turn o󰀨 the power to this product.
Failure to do so may result in electric
shock or device failure.
 CAUTION

General
For the sake of safety, installation and
wiring must be performed by qualified
personnel in accordance with all
applicable safety standards.
Failure to do so may cause fire or
electric shock.

General
All wiring must comply with applicable
codes and ordinances.
Otherwise there is a danger of re.
IMPORTANT •After wiring, attach the cover.
Failure to do so may result in measurement
error.
zWiring diagrams
Lead wire connection type
Model HY7045T1000
Power
supply
Humidity
24 V AC
(24 V DC)
Brown
Black
Blue
Gray
～(＋)
⊥(－)
＋
－
1–5 V DC
Figure 14. Wiring diagram (Room humidity sensor,
24 V AC/DC common power supply type)
Model
HTY7045T1P00
24 V AC
(24 V DC)
1–5 V DC
Brown
Black
Blue
Gray
A
B
B
～(＋)
⊥(－)
＋
－
Red
White
White
Pt100
Power
supply
Humidity
Temp.
Figure 15. Wiring diagram (Room temperature/humidity sensor,
24 V AC/DC common power supply type)
Model
HTY7045T1100
(Number of cores: 6)
24 V AC
(24 V DC)
1–5 V DC
1–5 V DC
Brown
Black
Blue
Gray
～(＋)
⊥(－)
H＋
H－
T＋
T－
Red
White
Power
supply
Humidity
Temp.
Figure 16. Wiring diagram (Room temperature/humidity sensor,
24 V AC/DC common power supply type,
temperature output: 1–5 V DC type)

15
AB-7521
zNotes for wiring
IMPORTANT •Do not connect the lead wires for
temperature and humidity outputs to the
power supply lines.
Doing so may cause smoke, burnout, or
device failure. Make sure all the wires
are correctly connected before supplying
power
•Do not share the 24 V AC transformer
with other products.
For power supply wiring and temperature/humidity
output wiring, 1.25 mm2or greater shielded multi-
core cables (CVV-S) are recommended.
1.25 mm2or greater IV cable is also connectable.
Be sure to ground the shielding on the controller
side.
The maximum cable length is 100 m.
For the wiring length, refer to the Specifications/
Instructions of the controllers to which the sensor is
connected.
zPower supply wiring method
Connect the sensor as described below.
When installing the sensor newly
•DC power supply
IMPORTANT •24 V DC power supply can be shared.
However, wire the brown wire (+) , blue
wire (+) , black wire (-) , and gray wire
(-) as illustrated in Fig. 17.
Model HY7045T/
Model HTY7045T
Controller
Brown (＋)
Red (＋)
White (－)
Black (－)
Blue (＋)
Gray (－)
＋
－
＋
－
Model HY7045T/
Model HTY7045T
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
Brown (＋)
Red (＋)
White (－)
Black (－)
Blue (＋)
Gray (－)
24 V DC Power supply
24 V DC
100 V AC
＋
－
Figure 17
•AC transformer (24 V AC power supply)
IMPORTANT •The AC transformer (24 V AC) cannot be
shared.
The same number of AC transformers (24
V AC power supply) as the sensors are
required.
AC transformer
24 V AC
100 V AC
AC transformer
24 V AC
100 V AC
Controller
＋
－
＋
－
Model HY7045T/
Model HTY7045T
Brown(～)
Red(＋)
White(－)
Black(⊥)
Blue(＋)
Gray(－)
Model HY7045T/
Model HTY7045T
Brown (＋)
Red (＋)
White (－)
Black(⊥)
Blue (＋)
Gray (－)
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
1–5 V DC
(Only Model HTY7045T1100)
Connect in the same way as the humidity
1–5 V (blue, gray).
Figure 18

16
AB-7521
When replacing the existing sensor
IMPORTANT •If two or more sensors are used, the
same number of AC transformers (24 V
AC power supply) as the sensors are
required.
Do not share the 24 V AC transformer.
If replacing the existing products with the sensors
(including mixture of existing sensors) , please
check whether the AC transformer (24 V AC) is
shared or not.
Note: For the DC power supply, it is the same as installing new-
ly. (Fig. 17.)
AC transformer
24 V AC
100 V AC
～
⊥
Existing sensor
～
⊥
Existing sensor
Figure 19. Wiring before replacement
AC transformer
24 V AC
100 V AC
100 V AC
AC transformer
24 V AC
～
⊥
Existing sensor
Brown (～)
Black (⊥)
Model HY7045T/
Model HTY7045T
Figure 20. Wiring after replacement

17
AB-7521
zNotes for wiring power
When supplying power to the sensor via the AC transformer (24 V AC power supply) , be sure to follow the
instructions below.
IMPORTANT •If the common line (-) of the controller is non-insulated type, do not share the AC transformer (24 V AC
power supply) for the humidity sensor or temperature/humidity sensor.
•If the AC transformer (24 V AC power supply) is shared, a loop will be made in the circuit and the sensor
may fail.
AC transformer
Model HY7045T/Model HTY7045T
Model HY7045T/Model HTY7045T
24 V AC100 V AC
Controller
＋
－
Blue
(+)
Gray
(-)
Black
(⊥)
Brown
(～)
Blue
(+)
Gray
(-)
Black
(⊥)
Brown
(～)＋
－
INCORRECT
Figure 21. A loop is made in the circuit
•If the AC transformer (24 V AC power supply) is shared, and if the wires are incorrectly connected between
the  brown wire (~) and the  black wire (┴) or between the  black wire (┴) and the  brown wire
(~) as illustrated below, a short circuit will be made in the circuit through the common line and the sensor
may fail.
AC transformer 

Model HY7045T/Model HTY7045T
Model HY7045T/Model HTY7045T
24 V AC100 V AC
Controller
＋
－
＋
－
(+)
Gray
(-)
Black
(⊥)
Brown Blue
(～)
(+)
Gray
(-)
Black
(⊥)
Brown Blue
(～)
INCORRECT
Figure 22. Incorrectly wired
zNote for signal wiring
Because of the induction current owing from the humidity sensor or the temperature/humidity sensor to the
controller input circuit or an inadequate time constant of the controller, the system may be affected by an
electrical noise.
In order to suppress noise, check the following items.
•Use a controller, which receives signals from the sensor, with a low pass filter (40 dB or higher noise
rejection ratio in the normal mode) .
•If the noise rejection ratio is insu󰀩cient, provide an isolator on the controller input signal.
No problem will occur for connecting the sensor to Azbil’s controller.
IMPORTANT • When the sensor gets faulty, a room may be over humidied due to decline of its output.
Please take a countermeasure at the controller side.
•Corrosive gas, organic solvent, and other chemicals contained in the atmosphere can cause measuring
error of the sensor, shorten its service life, or damage it.
if the sensor is used in an environment di󰀨erent from the ordinary air, please contact Azbil Corporation.

18
AB-7521
Handling
•Do not install equipment (such as o󰀩ce equipment, humidier) near this product, which generates heat or
steam.
•Reconrm that the wiring is done correctly.
Maintenance
The temperature/humidity sensor is inspected and its accuracy is tuned when it is shipped from the factory.
No eld adjustment is required.
The sensor should be inspected as described below.
zRegular inspection
According to the amount of dust in the air and the condition of dirt, determine the cycle for inspection and
check the sensing accuracy.
Check if the cover is clogged and clean it.
zTroubleshooting
Check the sensor according to table 1, if there is an abnormality, take necessary countermeasures.
If the abnormality cannot be recovered after taking the countermeasures, please contact Azbil Corporation.
Table 1. Troubleshooting
Abnormal conditions Possible causes Countermeasures
No output
Unstable output
Disconnected wires Redo wiring.
Power supply voltage Secure the power supply voltage described in this
manual.
Damaged sensing element Replace the sensor.
Measurement errors Installation location/environment Secure the installation location/environment
described in this manual.
Contamination or damage on the
sensing element
Replace the sensor.
zSafe keeping
If the sensor is installed in an animal breeding facility or an operating room, and when the room is fumigated,
attach the safe keeping cover (sold separately) over the sensor.
•Before removing the cover, check that fumigants are dried out.
If fumigants remain on the case of the sensor, chemical cracks may be made on it.
•When removing the cover, pull it slowly and straightly.
Do not apply excessive force, up and down, left and right, on the cover, or suddenly pull the cover out.
Otherwise, the latch on the cover may be damaged.
Disposal
Dispose of this product as industrial waste in accordance with your local regulations.
Do not reuse all or any part of the product.

19
AB-7521
This blank page was added for page layout purposes.

Specifications are subject to change without notice.
https://www.azbil.com/
Building Systems Company
2020
AB-7521
Rev. 1.0 Mar. 2020
This product complies with the following harmonised standards of the Electromagnetic Compatibility
Directive (EMCD) and the Restriction of Hazardous Substances Directive (RoHSD) .
EMCD: EN 61326-1 Class B, Table 1 (for use in a basic electromagnetic environment)
RoHSD: EN 50581