Watlow ANAFAZE LLS200212 Safety-type Temperature Limiting Controller
I. Basic Information
Brand: Watlow (a global leading brand in high-end temperature control)
Series: ANAFAZE LLS200 (LS series for safety limit temperature control, with independent over-temperature protection unit)
Full model number: LLS200212, material secondary code E257034
Positioning: Independent safety over-temperature protection module, not sharing the loop with the main PID controller. The equipment will hard-cut off the load when overheated and prevent fire and high-temperature accidents. It has a high safety level.
Model Segmentation Explanation
LLS: Limit Safety (Safety Limit Temperature Type)
200: Platform specification, power level
212: Order configuration code (20W power, standard input/output, 24VDC power configuration)
Comparison with the same series:
LLS200212: 20W standard model
LLS200424: Heavy-duty load model with 424W power
LLS100212: 10W low-power, low-temperature, economical model
Core Electrical and Power Parameters
Power Supply
Input power: 15~24VDC (±3V), no-load 300mA, full-load 1A
Overall power consumption: 20W
Temperature Measurement Input
Compatible general sensors: J/K/T/S/R/B type thermocouples, PT100 RTD thermal resistors
Temperature measurement range: -200℃ ~ +1700℃, full coverage of high and low temperature ranges
Temperature measurement accuracy: ±0.5℃, multi-level hardware calibration filtering, anti-EMI interference
Output Protection Circuit
Relay safety contact output, immediately disconnect heating load upon over-temperature; with hardware self-lock protection
Must be manually powered off / manually reset to restore output, eliminating the risk of fault startup. Communication
Standard RS485 interface, supporting Modbus RTU; can be connected to PLC and upper computer for remote reading of temperature, alarm status, and fault records.
Core Advantages of the Safety Architecture
Complete independent redundant protection
The sensors, power supply, and output drive are all physically isolated from the host PID temperature controller; when the host freezes, short circuits, or probe breaks, LLS still independently executes the over-temperature cut-off, which is the second line of defense for safety
Fixed factory set point
The protection temperature and hysteresis value of the LLS model are preset during production and cannot be arbitrarily modified on-site, preventing accidental modification of the safety threshold (different from the adjustable panel model of LV)
Multiple hardware protections
Probe breakage alarm, over-temperature lock, internal over-temperature self-protection, reverse connection prevention, surge suppression
Status LED indicator lights: power, over-temperature alarm, circuit fault, load on/off status
Environment and Installation
Operating temperature: 0℃ ~ +70℃; storage – 40℃~85℃
Humidity: 5%~90% RH, no condensation
Installation: standard DIN35 rail clip installation, enclosed metal shielding shell
Certifications: UL61010, CE, C-UL industrial safety certification
Typical Application Scenarios
Industrial ovens, spray curing furnaces, heat treatment furnaces for fire prevention over-temperature protection
Plastic extrusion machines, die head heating, injection molding machines for safe temperature limit control
Semiconductor heating platforms, precision laboratory temperature control safety protection
Food sterilization, baking equipment, medical heating equipment over-temperature protection
Explosion-proof / high-risk heating processes with SIL-level auxiliary safety circuits
IX. Comparison of the Same Series L Series
Table
Series Type Operation Method Applicable Scenarios
LLS200212 Safety Temperature Limiting LS Set value is factory-locked, no adjustable panel High safety, fire-resistant mandatory protection
LV Series Adjustable Temperature Control With buttons/knobs for on-site temperature modification Regular process PID temperature control
LF Series No Display Fixed Point Completely without operation interface Low-cost fixed protection points
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