ATR121

3 Digit Temperature Controller, ATR121
  • Features
    • UL, CE.
    • 3 Digit Temperature Controller
    • PC Programmable
    • Memory Card Programmable
    • 1 1/4 x 2 7/8 " cut out
    • 32 x 74 mm cut out
    • Isolated
    • Output up to 2 Relays
    • SSR




3 Digit Temperature Controller, ATR121

This controller has been replaced by the ATR124. A newer better and Compact Modbus PID Controller. 3 Digit Temperature Controller

The ATR121 is a compact and versatile 3-digit temperature controller designed for precision and reliability. This PID controller features up to 2 relay outputs and a solid-state output, making it suitable for a wide range of applications.

With its small footprint (1 1/4 x 2 7/8" cut-out) and robust design, the ATR121 can withstand harsh environments up to IP65 with an optional gasket. The device is programmable via a front panel keypad or PC-based software, supporting fast configuration with a memory card for cloning multiple units. The ATR121 supports various sensor inputs, including thermocouples, RTDs, mA, voltage, thermistors, and potentiometers, ensuring compatibility with numerous industrial processes.

This controller uses advanced PID and auto-tuning algorithms, optimized for both temperature regulation and fast-response processes such as pressure and flow control. Additionally, it offers open-close logic for valve control in HVAC and dosing systems, making it highly adaptable for diverse industrial applications.

ATR121 Specifications

Input °F °C
K type Thermocouple -436 to 999°F -260 to 999°C
S type Thermocouple -40 to 999°F -20 to 999°C
R type Thermocouple -40 to 999°F -20 to 999°C
J type Thermocouple -328 to 999°F -200 to 1760°C
RTD PT100 -328 to 999°F -200 to 600°C
RTD PT100 -328 to 284°F -200 to 140°C
NI 100 -76 to 356°F -60 to 180°C
NTC 10K Ohm Thermistor -40 to 257°F -40 to 125°C
PTC 1K Ohm Thermistor -40 to 257°F -40 to 150°C
PT500 -148 to 999°F -100 to 999°C
PT1000 -148 to 999°F -100 to 600°C
Voltage 0 to 10V
Current 0 to 20mA 4 to 20mA
Potentiometer 1 to 6K 1 to 150K
Output 2 x Relays 8 A. SSR.
Power Supply 12 to 24Vac/Vdc, 115Vac, 230Vac.
Power Consumption 3 to 6VA max.
Power Supply Operative- 32°F +113°F -0°C +45°C
Humidity (non condensing) 35-95%.
Housing Polycarbonate UL94V2 self-extinguishing
Dimensions 3 3/8" x 3 " x 2 1/8", 35 x 77x x 53 mm.
Weight 3 oz 100 g.
EMC For industrial environments.
Immunity: EN 61000-6-2.
Emission: EN 61000-6-4.
Configuration PC Configurable, Memory Card

ATR121 Wiring Connections

Power Supply ATR121-A and B ATR121-ADT
Positive Terminal 2 Terminal 2
Negative Terminal 1 Terminal 1
Output
Relay 1
Normally Closed Terminal 3 Terminal 3
Common Terminal 4 Terminal 4
Normally Open Terminal 5 Terminal 5
Relay 2
Common Terminal 6
Normally Open Terminal 7
RS485 Option Terminal 6
Terminal 7
SSR Output Negative 8 Negative 8
Positive 9 Positive 9
T/C's, Voltage, mA Positive 12 Positive 12
Negative 11 Negative 11
2 Wire Current Negative 9 Negative 9
Positive 12 Positive 12
Thermistor Terminal 10 Terminal 10
Terminal 11 Terminal 11
Potentiometer Terminal 10 Terminal 10
Terminal 11 Terminal 11
3 Digit Temperature Controller 24 Vdc power
3 Digit Temperature Controller with Modbus connection
3 Digit Temperature Controller 230 V power

FAQs

1. What types of sensors are compatible with the ATR121?
The ATR121 is compatible with various sensors, including thermocouples, RTDs, mA, voltage, thermistors, and potentiometers.
2. How many output options does the ATR121 have?
The ATR121 features up to 2 relay outputs and one solid-state output, providing flexible control options.
3. How can the ATR121 be programmed?
The ATR121 can be programmed using the front panel keypad or PC-based software. Additionally, configurations can be cloned using a memory card for quick setup of multiple units.
4. What are the dimensions of the ATR121, and does it have environmental protection?
The ATR121 has compact dimensions with a cut-out size of 1 1/4 x 2 7/8 inches. It offers environmental protection up to IP65 with an optional gasket, making it suitable for harsh conditions.
5. What control algorithms are available in the ATR121?
The ATR121 supports various control algorithms, including on-off, proportional (P), proportional-integral (PI), and proportional-integral-derivative (PID) control, with both manual and auto-tuning options.
6. Is the ATR121 suitable for non-temperature applications?
Yes, the ATR121 is versatile and can be used for other applications like pressure and flow control due to its configurable inputs and control options.
The ATR121 is an efficient, reliable solution for any application requiring precise temperature control, offering flexibility and ease of integration into existing systems.

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