Dwyer Instruments Series TSXT Installation and Operating Instructions

Series TSXT Digital Temperature Switch

REL2 REL1 COM REL3

GASKET

1.110
[28.3]

®

Specications - Installation and Operating Instructions

Bulletin T-TSXT

The Series TSXT Digital Temperature Switch is designed with many refrigeration
applications in mind. It accepts up to 3 temperature inputs, of either PTC or NTC
temperature probe types and can control the compressor, defrost, fan, alarm, and

light in a refrigeration system. These switches allow master/slave conguration to

synchronize the defrost cycle between different units. The Series TSXT programming
performed by the front keypad, the TS2-K programming key, or by RS485 module
communication. Standard features include capacitive buttons, real time clock, HACCP
alarm logging, temperature alarms, and password protected parameter settings.

MODEL CHART
Model Supply Power Outputs Model Supply Power Outputs
TSXT-211

TSXT-221
TSXT-231
TSXT-241
TSXT-212
TSXT-222

INSTALLATION
Note: Unit must be mounted away from vibration, impacts, water, and corrosive gases.

• Cut hole in panel 2.80 x 1.14 inches (71 x 29 mm).

• Use the included gasket, or apply silicone around the perimeter of the hole to prevent
leakage.

• Insert the unit into the hole in panel.

• Slide removable tting clips onto unit from back until secure to panel.

• Wire the unit per the wiring diagram on the product label or by gures below. Avoid

installing temperature probe and digital input wiring in the proximity of power cables.

115 VAC
230 VAC
12 VAC/VDC
24 VAC/VDC
115 VAC
230 VAC

1
1
1
1
2
2

TSXT-232
TSXT-242
TSXT-213
TSXT-223
TSXT-233
TSXT-243

12 VAC/VDC
24 VAC/VDC
115 VAC
230 VAC
12 VAC/VDC
24 VAC/VDC

2
2
3
3
3
3

3.110 [79.0]

AUX

SET

Panel cutout 2-51/64˝ x 1-9/64˝ (71 x 29 mm)

SPECIFICATIONS
Probe Range: PTC: -58 to 302°F (-50 to 150°C); NTC: -58 to 230°F (-50 to 110°C).

PTC (1000 Ω @ 25°C) or NTC (10 KΩ @ 25°C) thermistor.

Input:
Output: Relay 1: SPST relay rated 16 A @ 240 VAC resistive, 10 FLA, 60 LRA;

Relay 2: SPST relay rated 5 A @ 240 VAC resistive; Relay 3: SPST relay rated 8 A
@ 240 VAC resistive.

Horsepower Rating (HP): 1 HP (Relay 1).
Control Type: On/off with defrost options.
Power Requirements: 115 VAC, 230 VAC, 24 VAC/VDC, or 12 VAC/VDC.
Power Consumption: 3.6 VA @ 115/230 VAC; 1.5 VA @ 12/24 VAC/VDC.
Accuracy: ±1% FS.
Display: 3-digit, plus sign.
Resolution: 0.1°.
Memory Backup: Nonvolatile memory.
Ambient Operating Temperature: 32 to 131°F (0 to 55°C).
Storage Temperature: -4 to 176°F (-20 to 80°C).

115 and 230 V models: 7.2 oz (204 g); 12 and 24 V models: 4.8 oz (136 g).

Weight:
Front Panel Rating: IP65.
Agency Approvals: CE, cURus.

1.440
[36.5]

2.440 [62.0]

Wiring Diagram

Sd3 Sd2 Sd1 Com In Sd3 Sd2 Sd1 Com In

678910

POWER
SUPPLY

TSXT-XX1

TS2-K TS2-K

Sd3 Sd2 Sd1 Com In

1234 5 678910

1 relay output

TSXT-XX2

2 relay outputs

POWER
SUPPLY

DWYER INSTRUMENTS, INC.

REL1 COM

REL2 REL1 COM

TS2-K

1234 5 678910

POWER
SUPPLY

TSXT-XX3

3 relay outputs

111234 5

Parameter Programming
Note: Set Point and the time programming are the only parameters accessible without

access code.

Activating and Deactivating Manual Defrost Cycle

Press and hold the AUX button for 2 seconds to activate defrosting. Repeat this
process to stop the defrosting. If a cool cycle is activated, the defrosting is disabled.

Set Point

• Press SET. Set Point value will appear on the display.

• Press SET again. The real value is shown on the display and can be modied with
the UP and DOWN arrows.

• Press SET to conrm any new values.

• Press SET and DOWN simultaneously to quit programming or wait one minute for

the display to automatically exit programming mode.

Real Time Clock

• Press SET. The Set Point value will appear on the display.

• Press the UP or DOWN arrow to change to Hour or Minute.

• Press SET to see the assigned value.

• Use the UP and DOWN arrows to set the desired value.

• Press and hold SET for 8 seconds to program value. The word “Pro” should appear
on the screen if the value has been programmed correctly.

• Press SET and DOWN simultaneously to exit or wait for the timeout.

Protected Parameters

• Press and hold SET for 8 seconds. The access code value 00 is shown on the
display.

• Using the UP and DOWN arrows, set the code (factory-set code is 00).

• Press SET to enter the code. If correct, the rst parameter label will be shown on

the display (SP).

• Use the UP and DOWN arrows to move to desired parameter and SET to view

parameter value.

• While viewing a parameter value, use the UP and DOWN arrows to modify parameter

value. Use SET to enter value and exit parameter.

• The display will blink when there is an error recording a parameter in memory or

when awaiting conrmation of a value.

• Press SET and DOWN simultaneously to quit programming or wait one minute to

automatically exit programming mode.

LED Indication and Display Messages

: Indicates if the load is connected. If continuous cool cycle is being

performed, this LED ashes (90% ON, 10% OFF). If the unit is waiting the
stopping time value stored in c0 to start a cool cycle the LED ashes (10%

ON, 90% OFF).

: Indicates if defrosting is active.

: Indicates an active alarm. The LED will ash if the alarm is cleared, but the

alarm condition persists.

: Indicates when fan control relay is active. Either H7 or H8 must be set to

one of the fan control modes (FAN or FAI).

HACCP: Indicates HACCP alarm recording feature is active.

Activating and Deactivating Cool Cycle

Press and hold the DOWN arrow for 8 seconds to activate a continuous cool cycle.

Repeat this process to stop the cool cycle. If defrosting is activated, the cool cycle is
disabled.

Fault Cycle

If the probe fails, the load is connected for the time set in c2 and then disconnected
for the time set in c3.
In case of memory error, the load is connected for 5 minutes and then disconnected
for 5 minutes.

On/Off Mode

This option is used to turn the control into an OFF or stand by mode, disabling the
display and outputs.

• Press and hold SET and DOWN for 8 seconds. The display will read OFF.

• Press and hold SET and DOWN for 8 seconds to return the control to normal

operation.

On/Off Light

The 2nd or 3rd relay can be congured as a lighting switch by setting the H7 or H8
parameter to Li. To activate or deactive the light relay, press and hold AUX and UP for

3 seconds.

Probe View

To view the probe not chosen in P5, press the SET and UP buttons.

HACCP

If this option is activated, the thermostat registers up to 5 high, low, and power loss
alarms. These alarms can be seen in the menu Registry of Alarms (HAC). To access
this menu, proceed to the parameters menu.

The rst value (nAt) that appears is the number of registered alarms. Next, the value

of the temperature (Adx) and the time of each alarm that exists (tdx) are displayed. For
the disconnection alarm, the temperature when returning the connection is registered,
as well as the time until the correct value is reached. (Probe<Set+A1-A0)

When the elapsed time is shown it will appear dxx (days). Pressing UP, hxx (Hours)

will be shown, and pressing UP again, nxx (Minutes) will be displayed. When located

over a temperature of alarm or time, pressing AUX + UP for 3 seconds, both recorded
data of the alarm (time and temperature value) are deleted.

In the HAC menu, pressing AUX + UP keys for 3 seconds, all the recorded alarm data
is deleted.

If an alarm or error occurs, the following messages will be shown and an internal
buzzer will sound.

The alarm can be cleared and buzzer silenced by pressing the SET and DOWN
buttons simultaneously. The alarm message will not be shown, but the alarm LED will
ash while the alarm condition persists.
Err = Memory error

ErP1 = Probe 1 error
ErP2 = Probe 2 error
ErP3 = Probe 3 error

Eri = Internal parameter error. In this case enter the factory default conguration, as
described in the Resetting to Factory Defaults section.

ALH = High temperature alarm
ALL = Low temperature alarm
ALE = External alarm
AEH = High temperature and external alarm
AEL = Low temperature and external alarm
ooo = Open probe error

- - - = Short circuit probe error

DON = Defrosting activated
DOF = Defrosting deactivated or cannot be done
CON = Continuous cold cycle activated
COF = Continuous cold cycle deactivated

-d- = Defrosting (when d5 set to -d-)

Setting Keyboard Code to Zero

• Turn unit off and back on. Press and hold SET for 8 seconds. Value 00 should ash

on the display.

• Set the code to 123 using the UP and DOWN arrows.

• Press SET to conrm the code. The code is now set to 00.

Resetting to Factory Defaults

• Access to parameter H0 as explained in parameter programming.

• Choose desired conguration.

• For Series TSXT-xx1: H0 is set to 0

• For Series TSXT-xx2: H0 is set to 1

• For Series TSXT-xx3: H0 is set to 2

• Press SET for 8 seconds, and the thermostat will be reset.