aci TUCH2 User manual

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
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I0000621 Rev 5 1
TUC2 / TUCH2
Model Series Installation Instructions
PLEASE READ INSTRUCTIONS CAREFULLY BEFORE INSTALLATION!
APPLICATION
The TUC2 provides temperature space monitoring with a backlit LCD. The TUCH2 provides
temperature and relative humidity monitoring with a backlit LCD. Depending on the
configuration, the units can display and output Temperature, Relative Humidity, Setpoint, Fan
Speed, System Status, and Occupied/Unoccupied Status.
The TUC2 and TUCH2 supports single temperature sensor operation for several common sensor
types and it provides the flexibility to choose from numerous setpoint output options. The
TUCH2 supports relative humidity output in all standard analog signals at 2%, 3%, or 5%
accuracy. A setup menu provides easy output and display configuration changes.
INSTALLATION
Precautions
REMOVE POWER BEFORE WIRING.NEVER CONNECT OR DISCONNECT WIRING
WITH POWER APPLIED.DO NOT ALLOW LIVE WIRES TO TOUCH THE CIRCUIT
BOARD.
AN ISOLATION TRANSFORMER IS RECOMMENDED WHEN POWERING THE
DEVICE WITH 24VAC.
DO NOT RUN THE TUC2 OR TUCH2 WIRING IN ANY CONDUIT WITH LINE
POWERED WIRING.
FAILURE TO WIRE DEVICES WITH THE CORRECT POLARITY WHEN USING A
SHARED TRANSFORMER MAY RESULT IN DAMAGE TO ANY DEVICE POWERED
BY THE SHARED TRANSFORMER.

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
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I0000621 Rev 5 2
Mounting
Carefully separate the cover from the base by pulling the cover and base apart towards
the bottom of the device. The hex screw may need to be turned in to release the cover.
Route the wires through the access hole in the center of the base and screw them into the
terminal blocks. Refer to the wiring instructions to make the necessary connections.
Attach the base directly to drywall, or to a standard 2” x 4” junction box using the
hardware provided. After wiring, attach the cover to the base and turn out the hex screw
until the cover cannot be removed.
Wiring
A 16 to 22 AWG shielded cable is recommended for all sensor installations. Be sure to
connect the cable shield to the ground at the controller only. The number of wires needed
depends on the application, with 3 wires minimum required to support the outputs of the
TUC2 unit. Generally, one wire is required for each output, one wire for power, and one
wire for ground. All outputs are common ground referenced.
Notes:
1. TUC2 units do not have RH or RHS terminal locations loaded.
2. If your TUC2 or TUCH2 has any output configured with a 10V or Current output,
the voltage at the +V terminal must be at least +18 VDC.

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
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I0000621 Rev 5 3
+V - +12 to +40 VDC or 20 to 28 VAC
COM -Ground or signal common, 20 to 28 VAC
T - Temperature sensor signal to controller
TS - Temperature set point signal to controller
O/R - Override signal to controller
F/A - Fan signal to controller
OFB - Occupied feedback signal from controller
S1 - 3.5mm phone jack ring / Digital input or output
S2 - 3.5mm phone jack tip / Digital input or output
S3 - 3.5mm phone jack shield
RH - RH signal to controller
RHS - RH set point or system signal to controller
Communication Jack Wiring
Modular Telephone Jack
Before mounting the base to the wall, make the appropriate connections to the
communication jack as described below. The number of wires needed depends on the
application. Using the provided wire nuts, attach the required wires to the proper
connector pins used by your application.
4 Pin 4 Connector
6 Pin 6 Connector
COM S3
F/A
TS
TO/R S1
OFB S2 RH
+V RHS
4
2
13
WIRE WIRE
NUMBER: COLOR:
1 BLK
2 RED
3 GRN
4 YEL
REAR VIEW:FRONT VIEW:
PIN 1
5
13
24 6
FRONT VIEW: REAR VIEW:
WIRE WIRE
NUMBER: COLOR:
1 BLU
2 BLK
3 RED
4 GRN
5 YEL
6 WHT
PIN 1

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
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I0000621 Rev 5 4
6 Pin 4 Connector
3.5mm Stereo Jack
Attach the required wires to the proper terminal locations. The TUC2 or TUCH2 supports
three signal wires, ring, tip, and shield. The number of wires needed depends on the
application.
OPERATION
Keypad
The keypad comes in a 2 button, 3 button, 4 button, 5 button, or 6 button version.
A 6 button keypad is needed for fan or system mode. A 3 button or 5 button
keypad is needed for override mode.
PIN 1 4
2
13
FRONT VIEW: REAR VIEW:
WIRE WIRE
NUMBER: COLOR:
1 BLK
2 RED
3 GRN
4 YEL
Ring
Shield
Tip
Terminal Block: Jack Connections:
S1 Terminal Ring
S2 Terminal Tip
S3 Terminal Shield
SETUP
MODE
SELECT
O/R

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I0000621 Rev 5 5
Normal Mode
The LCD can display temperature, RH, occupied status, system mode, and fan
mode. The display configuration can be setup when ordered or changed through
the setup menu. The backlight will turn on when the any key is pressed and will
turn off 10 seconds after the last key press.
Setpoint Mode
Press or to get into setpoint mode and change the setpoint. If a
temperature and RH setpoint are used, pressing or and will
switch the large numbers between temperature and RH. If temperature is
displayed in the large numbers, the temperature setpoint will adjust when or
is pressed. If RH is displayed in the large numbers, the RH setpoint will
adjust when or is pressed. If no keys are pressed for 10 seconds the
unit will automatically return to normal operation.

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
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I0000621 Rev 5 6
Fan/System Mode
Press to change the fan or system setting. The fan or system setting will
start blinking after is pressed. Press or and to switch
between the fan and system modes. The mode that is blinking will change when
or is pressed. Press to return to normal operation. If no keys are
pressed for 10 seconds the unit will automatically return to normal operation.
Setup Mode
Press and hold for 5 seconds or press and hold and for 10
seconds to enter setup mode. Once in the setup menu, or will scroll
through the setup menu. Press or and to enter menus. Press
or and to save a menu selections. Press to return to the
previous menu. If no keys are pressed for 15 seconds the unit will automatically
return to normal operation.
Setup Menu
The full setup menu with descriptions of all the options is shown on page 7. The
setup menu will change depending on the configuration ordered. Only the menu
options that apply to the configuration ordered will be shown. For instance, if no
Fan or System were ordered then those menu options would not appear.
Setup Lockout
In the setup menu there is an option to lockout setup mode. This can be used if
you do not want users to change the setup. Once the setup menu is locked, press
and for 10 seconds to get into setup mode.

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I0000621 Rev 5 7
Temp. Setpoint
Calibration
Selects between two
different setpoint
outputs, only supported
for special orders
RH Menu Display Menu Fan Menu System Menu Additinal Options Menu
Temperature Menu
Degrees F or C
Changes the temp.
scale and setpoint
scale
Offset Adjustment
Adjusts the temp.
output up to +/- 5
degrees
Temp. Output Range
Changes the temp.
output range for analog
outputs
Temperature DA/RA
Changes the temp.
output to direct or
reverse acting for
analog outputs
Temperature Options
Temperature Test
Sets the temp. output
to 40F, 72F, or 104F
for testing the output
Temperature Tenths
Removes the tenths
place from the temp.
display
Temp. Setpoint
Midpoint
Sets the temperature
setpoint midpoint
Temp. Setpoint Options
Temp. Setpoint Range
Sets the temp.
setpoint range
Temp. Setpoint
Keylock
Locks out the user from
making any setpoint
changes
Temp. Setpoint DA/RA
Changes the setpoint
output to direct or
reverse acting for
analog outputs
Temp. Setpoint Display
Sets how the setpoint is
displayed, either an
offset or temperature
can be displayed
RH Offset
Adjusts the RH
output up to +/- 5%
RH
RH Test
Sets the output to
0%, 50%, and 100%
for testing the output
RH DA/RA
Changes the RH
output to direct or
reverse acting
RH Tenths
Removes the tenths
place from the RH
display
RH Options
RH Setpoint Options
RH Setpoint
Midpoint
Sets the RH setpoint
midpoint
RH Setpoint Range
Sets the RH setpoint
range
RH Setpoint
Keylock
Locks out the user
from making
setpoint changes
RH Setpoint DA/RA
Changes the
setpoint output to
direct or reverse
acting for analog
outputs
RH Setpoint Display
Sets how the
setpoint is
displayed, either an
offset or RH can be
displayed
Display Setup
Changes what is
displayed and the
location on the
display
Display Options
Backlight Brightness
Sets the backlight
brightness
Setpoint Always On
Sets the setpoint to
always be displayed
Fan On or Off
Hides the fan
display
Fan Options
Fan Keylock
Locks out the user
from making fan
adjustments
System On or Off
Hides the system
display
System Options
System Keylock
Locks out the user
from making system
adjustments
Setup Lockout
Locks out the setup
menu. To get into
the setup menu
when locked, press
the up and down
arrows for 5
seconds
Additional Options
Factory Reset
Resets the unit to
factory defaults
Factory Reset
Resets the unit to
factory defaults
Factory Reset
Resets the unit to
factory defaults
Software Version
Displays the
software version
number.
Backlight Duration
Sets the length of
time the backlight
stays on**
** Increasing the time the backlight stays on will reduce the life of the backlight

2305 Pleasant View Rd. Middleton Industrial Park Middleton, WI 53562
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I0000621 Rev 5 8
Specifications
Warranty Statement
The A/TUC2 Series and the A/TUCH2 Series are covered by ACI’s Five (5) Year Limited
Warranty, which is located in the front of ACI’s SENSORS AND TRANSMITTERS
CATALOG or can be found on ACI’s web site, which is: www.workaci.com
Supply Voltage
+12-40VDC (Resistance, 0-1V, 0-5V, 0.5-4.5V)
+18-40VDC (0-10V, 2-10V, 0-20mA, 4-20mA)
20-28 VAC (All Outputs)
Supply Current
100mA max (Current Output Models)
16mA max (Voltage and Resistive Output Models)
Temperature Accuracy
+/- 1°F (+/- 0.56°C)
Operating Temp. Range
40°F to 104°F (5°C to 40°C)
Operating Environment
32°F to 122°F (0°C to 50°C)
0 to 95% RH (non- condensing)
RH Measurement Range
0 to 100% RH (non-condensing)
RH Accuracy at 77°F
10% to 95% RH +/-2%. +/-3%. +/-5%
Analog Outputs
Resistive, 0-1V, 0.5-4.5V, 0-5V, 1-5V, 0-10V, 2-10V, 0-20mA,
4-20mA
(500 ohms maximum load resistance on current outputs)
Setpoint Accuracy
+/- 5% Full Scale Output (Resistance)
+/- 2% Full Scale Output (Analog)
Analog Setpoint Outputs
Resistive, 0-1V, 0.5-4.5V, 0-5V, 1-5V, 0-10V, 2-10V,
0-20mA, 4-20mA
Setpoint Resolution
Increments
+/-1°F (+/- 0.5°C) for Temperature or +/-1% for RH
Setpoint Range
See ordering information
Override, Fan, & System
Options
See ordering information
Communication Jack
See ordering information
Approvals
RoHS, REACH