FTI TB750 Series User manual

User ’ s Manual
TB750 series
FTI Technology Inc
www.ftisensors.com

1
Temperature and
Humidity Switch
TB750 series
Product overview
Temperature and Humidity Switch TB750 series is an integrated instrument for
temperature and humidity measuring and monitoring. It is composed of two
parts: a multi-function displayer and a sensor (please refer to the figure below).
The displayer receives the signal from the sensing unit and converts the signal
into a standard industrial signal for output to the client. The product has output
and switching alarm capability and is able to perform a variety of control logics
through parameter settings.
This switch is intrinsically safe type. It is designed and manufactured in accordance with standards "GB3836.1-2010 "Explosive
atmospheres - Part 1: General requirements for equipment", "GB3836.4-2010 "Explosive atmospheres Part 4: Equipment
protected by intrinsically safe ", and "Q/FTI01-2017 "TB750 series switch controller" enterprise standards.
Parameters
Power supply 9~28VDC
*1
Ambient temperature -30~60 ℃
Power consumption 360mW(@20VDC)
*1
Ambient humidity 0~100%RH
Excitation power 14~24VDC
*2
Storage temperature -40~80 ℃
Output signal 4~20mA Ambient air pressure 86~106kPa
Load capacity ≤ 500 欧 (@24V) Protection class IP66
Temperature range -20~80 ℃ Switch characteristics 0.1A/60V AC/DC
Humidity range 0~100%RH Electrical connection M16 Waterproof connector
*3
Error ± 0.3 ℃ ; ± 2%RH Explosion-proof type Intrinsically safe type
*4
Note: 1. Only refers to the power supply of the head;
2. The transmitter unit needs an external power supply (excitation power);
3. Suitable for cables with outer diameter of φ 4-8;
4. Explosion-proof sign: Ex ia IIC T4;
Power supply intrinsically safe parameters: Ui=28VDC, Ii=93mA, Pi=0.66W, Ci=0uF, Li=0mH
Switch intrinsically safe parameters: Ui=30VDC, Ii=50mA, Pi=100mW, Ci=0uF, Li=0mH
Signal input and output: Ui=30VDC, Ii=100mA, Pi=0.75W, Ci=0uF, Li=10uH
C

2
Temperature and
Humidity Switch
TB750 series
Dimensional drawing Electrical connection
Installation and operation
TB750 Intrinsically safe wiring diagram

3
Temperature and
Humidity Switch
TB750 series
Fixation and installation
This product should be fixed and installed on the wall or other suitable surfaces by mounting brackets, typically on a vertical
wall. M4 screws are recommended for fixation. The mounting size of the bracket-fixing hole is 122mm×116mm.
Electrical connection
The controller has three M16×1.5 waterproof cable connectors, which are power & switch, signal output and sensor
connection (factory pre-connected) assigned from left to right. For basic connection please refer to Figure 1 (no explosion-
proof requirements).
When applied to explosion-proof systems, it must be used with safety barriers to form a security explosion-proof system
(refer to Figure 2). The power supply of the controller can be either an intrinsically safe power supply that meets the
requirements or an analog safety barrier with power distribution (refer to figure 2). Figure 2 shows an example of XM33-
11EX-Hi as controller power supply, EM33-22EX-Hi as the switching safety barrier, and WM33-22EX-Hi/24 as the analog
safety barrier for connection.
Note:
Please strictly follow the wiring diagram in the product manual for electrical connection. When this controller is applied to the
intrinsic safety system, in addition to this product manual, the installation and operation must also be in accordance with the
regulations of GB336.13-2013 "Explosive atmospheres - Part 13: Repair, troubleshooting, mending and reforming of
equipment", GB3836.15-2000 "Electrical equipment for explosive gas atmospheres - Part 15: Electrical installation in
hazardous places (except for coal mine)", GB3836.16-2006 "Electrical equipment for explosive gas atmospheres - Part 16:
Inspection and maintenance of electrical installations (except for coal mines)" and GB3836.18-2010 "Explosive atmospheres
-Part 18: Intrinsically safe systems".

4
Temperature and
Humidity Switch
TB750 series
Debugging and settings
Overview of parameter settings
The initial state of the controller after power-on is defined as "General state". The state of entering the menu operation and
setting parameters is defined as “Setting state”.
Corresponding menus set the parameters of the controller, and each parameter has a corresponding menu. There are a few
additional menus that perform specific functions.
Setting parameters: press “Enter” in “General state” to enter the setting state if the password is 0. Otherwise, “Password” will
display, input correct password to enter the setting state.
Selecting menus: press “Shift” (flip up) or “Change” (flip down) to change between menu items.
Entering or exiting the menus: press “Enter” once.
Modifying parameters: press “Enter” to enter the menu; the lowest bit of the parameter value will be negative displayed,
press “Change” to modify the value on the bit. The value on the negative displayed bit will add one with each press of
“Change”. When it adds up to 9, the bit will automatically become 0. When the lowest bit is modified, press “Shift” once, the
nearest next bit will be negative displayed. Modify the value in the same way by pressing “Shift” and “Change” alternately to
complete all the modification.
Saving and exiting the menu: Execute the “Ok” menu
The functions of each menu are described below.
Setting the damping
Corresponding menu: Damping
The damping setting is used to stabilize the sampled signal and allow smoother data display. The damping setting range is
0.0~100.0s. Damping will increase the response time. It should be set reasonably according to the working conditions.
Temperature switch control parameters: KtA, KtB, KtDelay and KtType
Corresponding menus: Kt-A, Kt-B, Kt-Delay and Kt-Type
Parameters KtA and KtB can be combined to form 3 control schemes as follows:
1. With differential control: KtA<KtB, switch acts when the measured value > KtB, switch resets when the measured value is
< KtA.
2. No differential control: KtA=KtB, switch acts when the measured value > KtB, switch resets when the measured value <
KtA.
3. Window control: KtA> KtB, switch acts when KtB < measured value < KtA, otherwise switch resets.
Parameter KtDelay is used for switching action delay with a setting range of 0.0~100.0 seconds. This parameter is equally
effective for switching action and switching reset. Parameter KtType is used to set the switch contact type: 0 represents
normally open type and 1 for normally close type.

5
Temperature and
Humidity Switch
TB750 series
Humidity switch control parameters: KhA, KhB, KhDelay and KhType
Corresponding menus: Kh-A, Kh-B, Kh-Delay and Kh-Type
These 4 parameters are used for the control setting of the humidity switch. Please refer to the temperature switch control
parameters for functions.
Temperature range
Corresponding menus: Temp-Zero and Temp-Span.
Temp-Zero menu is for setting the starting point of the temperature signal range, that is, the temperature value
corresponding to 4mA temperature signal. Temp-Span menu is for setting the end point of the temperature signal range,
which is the temperature value corresponding to 20mA temperature signal. The unit of temperature is °C.
Humidity range
Corresponding menus: Humi-Zero and Humi-Span
Humi-Zero menu is used for setting the starting point of the humidity signal range, that is, the humidity value corresponding
to the 4mA humidity signal. Humi-Span menu is used for setting the end of the range of the humidity signal, which is the
humidity value corresponding to the 20mA humidity signal. The unit of humidity is %RH.
Setting the password
Corresponding menu: Pw-Config
This menu is used to set a numeric password in the range of 0~999. When the password is not 0, password protection is
activated. To enter the menu, the correct password should be input each time.
Saving the modification and exiting the setting state
Corresponding menu: Ok
It is used to check the correctness of the parameter settings. If the check passes, the device saves the parameters and
returns the general state.
If the check fails, it automatically turns to the menu with the wrong settings.
Cancelling the modification and exiting
Corresponding menu: ESC
It is used to exit the setting state directly without saving any parameter modifications.

6
Temperature and
Humidity Switch
TB750 series
Product maintenance
If there are problems during installation and use, please contact our company in time and do not open and repair without
authorization. The connection must be done strictly according to the "wiring diagram" to prevent damage to the product.
During the installation and use of the product, avoid impact and knocking which would cause damage or affect the
performance. It is recommended to check the zero point regularly, and if necessary, correct the deviation through parameter
settings to reduce the measurement error.

FTI Technology,Inc 8930S.Beck
Avenue,Ste107Tempe,Arizo na 85284 USA
E-mail:[e-mail] www.Ftisensors.com
V0.0.0.221124