Nuwave Technologies MicroTC Small Temperature Controller
The MicroTC is a compact and cost-effective temperature controller designed for precise temperature management.
Product Description
The Micro TC is the smallest and lowest cost temperature controller offered by Nuwave Technologies. It is factory set for specific setpoints and hysteresis but can be field-adjusted using an external potentiometer. The Micro TC features a 3 Amp MOSFET output capable of driving an SSR or a small heater. Its integrated sensor eliminates the need for an external thermocouple or RTD, reducing overall cost.
- Extremely Cost Effective
- Super Compact Design
- Mounts with One Screw
- Reverse or Direct Acting (Heat or Cool)
- Custom Temperature Ranges
- Fixed Setpoints & Hysteresis
- -10 to 85°C with +/- 0.5°C Accuracy
- Freeze Protection, Temperature Control
- On-Off or Proportional Control
- Limited Two Year Warranty
Ordering Codes
MicroTC
Format: MicroTC-[Setpoint Temperature] [Band/Hysteresis] [Control Type] [Acting Mode] [Voltage]
- Setpoint Temperature (XX.X degC) *(E) for External Band or Hysteresis (XX.X degC)
- (O) On-Off Control OR (P) Proportional Control
- (R) Reverse or (D) Direct Acting Control
- Power Supply Voltage, (12) or (24) VDC
*For external setpoint, specify high and low limits of adjustment. For example: MICROTC-E(20-40) would have an adjustment range of 20-40°C.
Input Specifications
| Power Supply | 12 or 24VDC +/-10%, < 1 Watt Power Consumption |
| Temperature Setpoint Range | 0 to 85 degC |
| Fixed Setpoint Accuracy | +/- 0.5 degC |
| External Setpoint Input | ~0-5VDC +/-1.5V (0-100% of Potentiometer) |
| Setpoint Input Impedance | 100K |
| External Potentiometer Resistance | 50K Ohm |
Output Specifications
| Control Output | MOSFET, Open Drain, 26V Max, Max Sink Current: 3A@25°C, Ambient (Linear Derating to 1A@85°C Ambient). Output in proportional mode is time proportioned (PWM). |
Thermal Specifications
| Operating Temperature Range | 0 to 85 degC |
| Storage Temperature Range | -40 to 100 degC |
Dimensions & Wiring
Dimensions:
- Length: 1.675 inches
- Width: 0.375 inches
- Height: 0.169 inches (main board), 0.125 inches (sensor end)
- Mounting hole diameter: 0.100 inches
- Board thickness: 0.062 inches
Wiring Connections:
- +12 / 24VDC PWR (+V): Power input positive terminal.
- +5V OUT (POTCW): Provides 5V for external potentiometer.
- LOAD: Output to the controlled device (connected to GND).
- OUT (OPEN DRAIN): The MOSFET drain connection.
- SETPOINT (POTW): Input for external potentiometer wiper.
- GND, POT CCW (G): Ground and common connection for power and potentiometer.
A diagram shows the physical dimensions of the MicroTC board and the locations of various components (R2, R3, R4, R5, D1, D2, U1, U2, Q1, C1, C2) and the wiring terminals.
Operation
Reverse Acting (Heating) Examples:
Hysteresis - (O) Control: The output turns ON when the temperature drops below the setpoint minus the hysteresis value and turns OFF when the temperature reaches the setpoint.
Proportional Band - (P) Control: The output is modulated (PWM) within a defined proportional band around the setpoint. 100% output is at the lower limit of the band, and 0% output is at the upper limit.
Graphs illustrate the output behavior for hysteresis and proportional control in reverse acting mode.
Direct Acting (Cooling) Examples:
Hysteresis - (O) Control: The output turns ON when the temperature rises above the setpoint plus the hysteresis value and turns OFF when the temperature reaches the setpoint.
Proportional Band - (P) Control: The output is modulated (PWM) within a defined proportional band around the setpoint. 100% output is at the upper limit of the band, and 0% output is at the lower limit.
Graphs illustrate the output behavior for hysteresis and proportional control in direct acting mode.
Safety Information
The responsibility for determining the suitability of this component for use in any application lies solely with the purchaser, OEM, and end user. Suitability for use in your specific application should be determined by applicable standards such as UL, CUL, and CE. The completed system involving this component should be tested to those standards.
! WARNING: FIRE HAZARD!! Even high-quality electronic components can fail while keeping the full power ON. It is crucial to provide a SEPARATE (redundant) OVER TEMPERATURE SHUTDOWN DEVICE to switch the power off if safe temperatures are exceeded.
