NM0321427
The Eurotherm 3216 is a highly capable and compact 1/16 DIN (48x48mm) digital temperature and process controller that excels in applications requiring precise temperature or process profiling, also known as "ramp/soak" or "programmer" control. While it is a full-featured PID controller capable of maintaining a fixed setpoint, its advanced built-in programmer functionality allows it to execute complex temperature or process recipes over time.
As a "ramp controller," the 3216 can automatically vary its setpoint according to a pre-defined profile, moving through a sequence of "segments" that can include:
Ramps: Increasing or decreasing the temperature/process value at a set rate over a specific time.
Soaks (Dwells): Holding the temperature/process value constant for a set duration.
Events: Triggering auxiliary outputs (e.g., alarms, fans, solenoids) at specific points in the program.
This makes the 3216 an ideal solution for applications like heat treatment, curing, drying, environmental chambers, and other processes where precise thermal cycles are critical. Its "Quick Start" configuration simplifies setup, and the compact design integrates easily into control panels. It offers universal input capability to connect with various sensors and multiple output options for versatile control.
Key Features & Benefits (with focus on Programmer/Ramp functionality):
Compact 1/16 DIN Size: Space-saving design for efficient panel mounting.
8-Segment Programmer: Features a powerful, built-in programmer capable of storing and executing one program with up to 8 segments (ramp/soak pairs). This allows for precise control of temperature or process profiles.
Holdback Functionality: Can include "holdback" at the beginning of segments to guarantee soak periods are only timed when the process variable is within a defined band, ensuring process integrity.
Internal Timer: Configurable as an interval timer, delay timer, or for soft start functions.
Recipes: The controller can store different "recipes" (parameter sets), which can be selected via the operator interface or communications.
Precision PID Control: Employs advanced PID algorithms for accurate and stable control during both ramp and soak phases.
Universal Input: Highly flexible, accepting a wide variety of sensor types including:
Thermocouples: B, C, J, K, L, N, R, S, T, U, etc. (over 30 types).
RTDs: Pt100, Pt50.
Linear Process Inputs: 0-50mV, 0-20mA, 4-20mA, 0-10VDC.
Digital Readout: Clear 4-digit LCD display for Process Variable (PV), Setpoint (SP), and program status, alarm messages, and custom scrolling text.
Modbus Communication: Supports standard Modbus RTU protocol (RS485 or RS232C options) for remote supervision, setpoint retransmission (useful if a master system is initiating program starts/stops), and data acquisition.
Heater Current Monitoring & Diagnostics: Often includes a current transformer input to monitor heater current and detect faults like partial load failure, open circuits, or SSR short circuits, enhancing process safety and maintenance.
Alarm Functions: Configurable process alarms (absolute high/low, deviation high/low) with relay or logic outputs, which can also be triggered as "events" within the program.
Output Options: Various output types including relay, logic, and analog (0-20mA / 4-20mA DC) to control heating elements, cooling systems, or other actuators.
Robust Construction: IP65 / NEMA 4X front panel sealing, designed for industrial environments.
Ease of Configuration: "Quick Start" wizard and PC-based iTools software for simple setup and advanced parameter management, including graphical program entry.
Operating Temperature Range: 0 to 55°C (32 to 131°F).
Applications (specifically benefiting from Ramp Control):
Heat Treatment: Annealing, hardening, tempering, stress relieving, normalizing.
Ovens & Furnaces: Precise temperature profiling for various materials and processes.
Plastics Industry: Extrusion lines, hot runner systems, thermal forming.
Curing Processes: Composites, paints, adhesives.
Drying Processes: Controlled moisture removal.
Environmental Chambers: Simulating specific temperature and humidity cycles.
Kilns: Ceramics, glass processing.
Technical Specifications (Approximate - common configurations):
Size: 1/16 DIN (48mm x 48mm panel cutout)
Panel Depth: 90 mm to 101 mm (3.54 in to 3.98 in)
Input Types: Universal (Thermocouple, RTD, mV, V, mA - specified at order)
Control Modes: PID, ON/OFF, Valve Positioning
Programmer: 1 program x 8 segments (Ramp/Dwell) with 1 event output
Display: 4-digit, 7-segment LCD with backlight (green)
Supply Voltage: 85 to 264 VAC (50/60 Hz) or 20-29 VAC/DC (configurable)
Max Power Consumption: 6W to 8W (depending on options)
Outputs: Up to 3, configurable (Relay, Logic, 0-20mA/4-20mA DC)
Communication: RS485 Modbus RTU (most common), RS232C (optional)
Environmental Protection: IP65 (front panel), NEMA 4X
Operating Ambient Temperature: 0 to 55°C (32 to 131°F)
Operating Humidity: 5 to 90% RH non-condensing