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EZ-ZONE® Controller Family

Watlow's EZ-ZONE Integrated Thermal Loop

Watlow's EZ-ZONE® controllers decrease design and assembly time, require less panel space, minimize system complexity and best of all, lower the total cost of ownership. Because these products are modular and scalable, you only pay for what you need. You can order the EZ-ZONEs in multiple configurations giving you the flexibility to standardize on the product platform to solve your wide range of application needs.

EZ-ZONE features include RoHS compliance by design, TRU-TUNE®+ adaptive control and a variety of industrial communication protocols including EIA 485, EIA 232, EtherNet/IP™ and Modbus® TCP.

EZ-ZONE® RM Multi-Loop Controller

Watlow's EZ-ZONE RM integrated controller has a range of 1 to 16 modules controlling 1 to 64 loops. View this video to see how the EZ-ZONE RM can be used as a temperature controller, limit controller or hybrid controller.

Controller PID Temperature Control Limit Solid State Relay EtherNet/IP™ Loops
EZ-ZONE RM 1 to 64
EZ-ZONE PM 1
EZ-ZONE PM Express   1
EZ-ZONE ST * 1
* RUI/Gateway required for EZ-ZONE ST EtherNet™ connection

EZ-ZONE RM:  Integrated controller allows common controller platform across many applications and functions

1 to 64 PID loop controller
  • Saves money because only needed loops are purchased
Advanced PID control algorithm
  • Offers TRU-TUNE+ adaptive control to provide tighter control for demanding applications
Current monitoring for entire system
  • Detects condition of up to 18 individual outputs and loads through the use of three current transformer inputs
Communication capabilities
  • Provides a range of protocol choices including Modbus® RTU, Ethernet/IP™, Modbus® TCP and DeviceNet™
SPLIT-RAIL™ control
  • Allows mounting of high and low voltage modules in different cabinets with individual components functioning together even if physically split apart
AUTO CLONE™
  • Saves time by reducing complexity and automatically configuring a new module with the same parameter settings as the replaced module
SENSOR GUARD™
  • Prevents customer system shutdown and product scrap or loss by allowing a sensor to be chosen to backup another sensor in case of primary sensor failure

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EZ-ZONE PM:  Discrete PID controller AND over/under temperature limit

Features Benefits
Integrated PID and limit controller
  • Reduces wiring time and termination complexity
High amperage power controller output
  • Drives 15-ampere resistive loads direct and reduces component count
Current monitoring
  • Detects heater current flow and provides alarm indication of a failed output device or heater load
Serial communication capabilities
  • Provides a range of protocol choices including Modbus® RTU, Ethernet/IP™, Modbus® TCP and DeviceNet™
Remote set point operation
  • Supports efficient set point manipulation from a remote device such as a master controller or PLC

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EZ-ZONE PM Express:  Easy-to-use discrete PID controller AND over/under temperature limit

Features Benefits
Simplified menu
  • Fits basic applications with a user-friendly interface supported by two menus and a streamlined list of parameters
PID auto-tune
  • Provides auto-tune for fast, efficient start-up
Standard bus communications
  • Allows easy product configuration via PC communications protocol and free software
Factory Mutual (FM) approved over and under limit with auxiliary outputs
  • Increases user and equipment safety for over- and under-temperature conditions
Removable front panel
  • Saves time and labor with replacements and troubleshooting

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EZ-ZONE ST:  PID controller with solid state relay output and profiling capability

Features Benefits
Profile capabilities
  • Includes ramp and soak with four files and 40 total steps
Solid state relay output
  • Allows faster cycling, more precise control, increased heater life and energy efficiency
PID temperature control
  • Allows single input/dual output
  • Allows standard PID or advanced PID tuning algorithms
EZ-ZONE ST with optional EIA 485 Modbus® RTU
  • Allows communications with PLC, PC or HMI
EZKB (RUI) with optional EIA 232/485 Modubus® RTU, EtherNet/IP™, Modbus® TCP or DeviceNet™
  • Allows communications with PLC, PC or HMI
Back panel or DIN-rail mount
  • Provides several mounting options
Advanced controllability algorithms
  • Offers TRU-TUNE+ for meeting demanding controllability requirements

Modbus® is trademark of AEG Schneider Corporation.
EtherNet/IP™ and DeviceNet™ are trademarks of Open DeviceNet Vendors Association
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