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EZ-ZONE® PM Express

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The EZ-ZONE® PM Express panel mount controller is an industry-leading PID controller that allows optimal performance utilizing simple control and menu functionality without complex features. It is ideal for basic applications and usage levels.

The EZ-ZONE PM Express is the next generation controller to follow the legacy of Watlow’s SERIES 93, SERIES 935 AND SERIES SD controllers that offer easy-to-use features to perform many basic applications. The EZ-ZONE PM Express includes one universal input and an option for up to two outputs and is available in 1/32 and 1/16 DIN panel mount packages. It can be ordered as a PID process controller or as a dedicated over and under-temperature limit controller.

The EZ-ZONE PM Express is a valuable addition to the EZ-ZONE PM controller family which also includes the EZ-ZONE PM integrated controller and the EZ-ZONE PM standard version.

Specifications · Features and Benefits


Line Voltage/Power
  • 85 to 264VAC, 47 to 63Hz
  • 20 to 28VAC, +10/-15%; 50/60Hz, ±5%
  • 12 to 40VDC
  • 10VA max. power consumption
  • Data retention upon power failure via non-volatile memory
  • Compliant with SEMI F47-0200, Figure R1-1 voltage sag requirements @ 24VAC or higher
  • 0 to 149ºF (-18 to 65ºC) operating temperature
  • -40 to 185ºF (-40 to 85ºC) storage temperature
  • 0 to 90% RH, non-condensing
  • Calibration accuracy and sensor conformity: ±0.1% of span, ±1ºC @ the calibrated ambient temperature and rated line voltage
    • Type S: 0.2%
    • Type T below -50ºC: 0.2%
  • Calibration ambient temperature @ 77ºF ±5ºF (25ºC ±3ºC)
  • Accuracy span: 1000ºF (540ºC) min.
  • Temperature stability: ±0.1ºF/ºF (±0.1ºC/ºC) rise in ambient max.
Agency Approvals
  • UL®/EN 61010 listed
  • ANSI/ISA 12.12.01-2007 Class 1, Div. 2 Groups A, B, C, D, temperature code T4A
  • UL® 50, NEMA 4X, EN 60529 IP66
  • CSA C22.2 No. 24 File 158031
  • RoHS, W.E.E.E.
  • CSA 610110 CE
  • User selectable heat/cool, on-off, P, PI, PD, PID or alarm action, not valid for limit controllers
  • Auto-tune with control algorithm
  • Control sampling rates: input = 10Hz, outputs = 10Hz
  • Input and output capacity per controller type ordering information
Serial Communications
  • Isolated communications
  • Standard bus configuration protocol
Wiring Termination - Touch-Safe Terminals
  • Input, power and controller output terminals are touch safe, removable, 12 to 22 AWG
Universal Input
  • Thermocouple, grounded or ungrounded sensors, greater than 20MΩ input impedance, 2kΩ source resistance max.
  • RTD 2- or 3-wire, platinum, 100Ω @ 0ºC calibration to DIN curve (0.00385 Ω/Ω/ºC)
  • Process, 4-20mA @ 100Ω, or 0-10VDC @ 20kΩ input impedance; scalable
Functional Operating Range

Type J: -346 to 2192ºF (-210 to 1200ºC)
Type K: -454 to 2500ºF (-270 to 1371ºC)
Type T: -454 to 750ºF (-270 to 400ºC)
Type E: -454 to 1832ºF (-270 to 1000ºC)
Type N: -454 to 2372ºF (-270 to 1300ºC)
Type C: 32 to 4200ºF (0 to 2315ºC)
Type D: 32 to 4200ºF (0 to 2315ºC)
Type F: 32 to 2449ºF (0 to 1343ºC)
Type R: -58 to 3214ºF (-50 to 1767ºC)
Type S: -58 to 3214ºF (-50 to 1767ºC)
Type B: 32 to 3300ºF (0 to 1816ºC)
RTD (DIN): -328 to 1472ºF (-200 to 800ºC)
Process: -1999 to 9999 units

Output Hardware
  • Switched dc = 22 to 32VDC @ 30mA
  • Open collector = 30VDC max. @ 100mA max. current sink
  • Solid state relay (SSR), Form A, 0.5A @ 24VAC min., 264VAC max., opto-isolated, without contact suppression
  • Electromechanical relay, Form C, 24 to 240VAC or 30VDC max., 5A resistive load, 100,000 cycles at rated load
  • Electromechanical relay, Form A, 24 to 240VAC or 30VDC max., 5A resistive load, 100,000 cycles at rated load
  • NO-ARC relay, Form A, 24 to 240VAC, 15A @ 122ºF (50ºC), resistive load, no VDC, 2 million cycles at rated load
  • Universal process output: range selectable; 0 to 10VDC ±15mV into a min. 1,000Ω load with 2.5mV nominal resolution; 0 to 20mA ±30µA into max. 800Ω load with 5µA nominal resolution; temperature stability 100ppm/ºC
Operator Interface
  • Dual 4 digit, 7 segment LED displays
  • Typical display update rate 1Hz
  • Advance, infinity (RESET), up and down keys plus an EZ-KEY (not available in 1/32 DIN)
  • Infinity key is also labeled RESET on limit control models
  • EZ-KEY automatically programmed as an auto/manual transfer mode function on PID models

Features and Benefits

Simplified menu
  • Fits basic applications with a user-friendly interface supported by two menus and a streamlined list of parameters
  • Eliminates complexity often experienced with more advanced controllers and unnecessary features
  • Reduces training costs and user programming errors
PID auto-tune
  • Provides auto-tune for fast, efficient startup
Standard bus communications
  • Allows easy product configuration via PC communications protocol and free software
  • Saves time, simplifies programming process and improves reliability of controller setup
Factory Mutual (FM) approved over and under limit with auxiliary outputs
  • Increases user and equipment safety for over and under-temperature conditions
Agency approvals: UL® listed, CSA, CE, RoHS, W.E.E.E. FM, SEMI F47-0200, Class 1, Div. 2 rating on selected models
  • Assures prompt product acceptance
  • Reduces end product documentation costs
Front panel removable
  • Saves time and labor for replacements and troubleshooting
P3T armor sealing system
  • Complies with NEMA 4X, IP66 specifications
  • Allows controller to be cleaned and washed
  • Certified UL® 50 independent to NEMA 4X specification
Touch-safe package
  • Increases installer and operator safety
  • Complies with IP2X requirements
Consistent Termination Labeling (CTL) connection system
  • Simplifies switching between products
  • Speeds up user’s system documentation
Three-year warranty
  • Demonstrates Watlow’s reliability and product support
High-amperage power control output
  • Drives 15 ampere resistive loads direct
  • Reduces component count
  • Saves panel space and simplifies wiring
  • Reduces cost of ownership
Class 1, Div. 2
  • Rated UL® 1604 for use in hazardous locations
  • Saves agency and component costs



· EZ-ZONE® PM 1/32 DIN

· EZ-ZONE® PM 1/16 DIN