Toho TTM002 PID Temperature Controller is a small controller only 48x24mm in size; it is a fully PID controller that offers all the functionalities of controllers made to a larger scale.
Self-Tuning PID (Heating / Cooling)
The most appropriate PID constant is automatically computed for the controlled objects.
PID constant is computed by performing the tuning, or when the hunting occurs.
● Blind Function
From the various existing parameters, only the required parameters can be
indicated or set.
● Simplified Timer Function
ON/OFF setting control is available after some certain interval. Function of ON/
OFF alarm output is independently usable.
● Priority Display
Demanding parameter screens are monitored and set up under operational mode
screen. (max. 9 points)
● Multiple Inputs
Thermocouple / R.T.D. (Pt100 & JPt100) are selectable by front key.
● External Standard
Conforms to “UL”, “cUL” and “CE” markings (except TTM-002W) and compliant to
The 6 substances restricted by the RoHS directives are not used.
● Compact Size
Compactly made with the depth of only 77mm (002W is 95mm).
● Manual Control (Balanceless & Bumpless)
Manual output function is applicable for versatile applications of instrumentation
● Sampling Cycle: 250mS
● Communication Function (RS-485: TOHO Protocol / MODBUS)
The communication distance is extended up to 500 m, and max. of 31 units
of controllers can be connected to a single computer at a time. Centralized
supervision is available for the collection of the whole data and alteration of setting
values at remote locations.
● Digital PV Filter
Filtering is possible with software for abrupt alteration of the input value.
● PID with Overshoot Control Function
A PID control is available to control the overshoot which occurs when the control
is just starting.
Further, in order to improve the controllability, PID algorithm of TTM-200 series
had been introduced.
● DI Function
The following functions are switchable:
① SV / SV2
② RUN / READY
③ AUTO (RUN) / Manual
④ Normal / Reverse Action
⑤ AT (Auto-Tuning) Start
⑥ Normal (SV2) / Reverse Action (SV)
⑦ TIMER Start / Reset
① CT Input (w/ Input Monitor)
② Shift setting of OFF position during the ON / OFF control (for both Output 1 & 2).
③ Heating / Cooling Control (w/ PID Control Function on Cooling Side).
④ Ramp Function
A proportional–integral–derivative controller (PID or three-term controller) is a control loop feedback used on applications that require continuous control operation. A PID controller continuously calculates an error value as the difference between the setpoint (SP) and a measured process variable (PV) and applies a correction based on proportional, integral, and derivative terms (denoted P, I, and D, respectively), hence the name. For more information about PID controllers, you can click here.