ATR121 | 32x74 mm PID Controller

This compact PID controller features high configurability. The analogue input is programmable for temperature sensors (resistance thermometers, thermocouples) but also for pressure transmitters, humidity and flow sensors.

The heating-cooling PID control algorithm is optimized for both temperature regulation and for processes with quick transitory, like pressure and flow control.

Software features of the ATR121 include open-close logics for valve control in industrial HVAC and dosing systems.

The controller outputs are always freely selectable selectable as command/multiple alarm modes/events.


Scheda tecnica
Certificato UL
File modello 3D (Step)
74 x 32 x 53 mm
Box: polycarbonate, Front: ABS UL94V0 self-extinguishing
Approx. 100 g
Front panel: IP54, Box: IP30, terminal blocks IP20
Operating conditions
Temperature 0-45 °C, humidity 35..95 uR%




Power supply

12..24 V AC / DC ±15% 50/60 Hz - galvanic isolation 2,5KV

230 V AC ±15% 50/60 Hz - galvanic isolation 2,5KV

Power consumption

2,4 Watt/VA max

3 Watt/VA max


3 cifre, 0,56” red + 3 signaling leds

Analogue inputs

1 x Ris. 16bit, programmable for thermocouples K, S, R, J (automatic compensation of cold junction 0..50°C, ±0,5% F.S. ±1 digit F.S.), Thermoresistances PT100, PT500, PT1000, Ni100, PTC1K, NTC10K (β 3435K), Process signals 0..10 V (40000 points), 0/4..20mA (30000 points), Potentiometers 6..150 KΩ (40000 points).

0-10V: Ri > 110KΩ
0-20mA: Ri < 4.7Ω
4-20mA: Ri < 4.7Ω

Sampling time

100 ms (frequency 10 Hz)

Digital output

1x 12..35 VDC - 30 mA for SSR command

1x 8 VDC - 20 mA for SSR command

Auxiliary output

12 VDC - 30mA max for sensor supply

12 VDC - 20mA max for sensor supply

Relais Output

1x 8 A - 250 V AC resistive loads

1x 5 A - 250 V AC resistive loads

Control algorithms
ON - OFF with hysteresis, P., P.I., P.I.D., P.D. time proportional
Manual or automatic
Alarm mode
Absolute / Threshold, Band, High / Low deviation. Alarm with optional Manual reset. Loop Break Alarm
Double P.I.D
Heating / Cooling with double P.I.D.
Rising gradient expressed as Degrees / Hour or fixed output percentage
Open / Close logics
Open / Close logics for motorized valves
Software parameter configuration
Memory Card, software LABSOFTVIEW, EASY-UP codes
Data protection
Lock of Command/Alarm Setpoints - Access to parameters by Password

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