Watlow EZ-Zone PM Express Limit Controller

Features and Benefits:

Simplified menu

• Fits basic applications with a user-friendly interface supported by two menus and a streamlined list of parameters

• Eliminates user complexity often encountered when using more advanced limit controllers and their unnecessary features

• Reduces user training costs and programming errors

Standard bus communications

• Allows easy product configuration via PC communications protocol and free software

• Saves time, simplifies the programming process and improves reliability of the 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

• Ensures prompt product acceptance

• Reduces end-product documentation costs

Front panel removable

• Saves time and labor for replacements and troubleshooting

P3T armor sealing system

• Complies to NEMA 4X, IP65

• 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

• Ensures product support and protection

High-amperage power control output

• Drives 5 ampere resistive loads direct

• Reduces component count

• Saves panel space and simplifies wiring

• Decreases ownership cost

EZ-ZONE PM Express Limit:

The EZ-ZONE PM Express panel mount limit controller from Watlow is an industry leading limit controller that allows for optimal performance utilizing simple over/under limit control and menu functionality without complex features. The EZ-ZONE PM Express limit controller is ideally suited for basic applications and usage levels.

The EZ-ZONE PM Express limit controller is the next generation of controllers leveraging the strong legacy of Watlow’s SERIES 94, SERIES 945 and SERIES SD limit controllers where easy-to-use features are needed for basic applications. It includes one universal input and the option for up to two outputs and is available in 1/32, 1/16, 1/8 and 1/4 DIN panel mount packages.

The EZ-ZONE PM Express limit is a great addition to the EZ-ZONE PM family which includes two other controller versions, the EZ-ZONE PM integrated controller and the EZ-ZONE PM temperature and process controller. This family provides an ideal platform to perform many applications.


Watlow EZ-Zone PM Express Limit Controller is available to buy in increments of 1

Watlow EZ-Zone PM Express Limit Controller




Line Voltage/Power

• 85 to 264VAC, 47 to 63Hz

• 20 to 28VAC, +10/-15%; 50/60Hz, ±5%

• 12 to 40VDC

• 10VA (1/32 and 1/16 DIN) 14VA (1/8 and 1/4 DIN) 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 149°F (-18 to 65°C) operating temperature

• -40 to 185°F (-40 to 85°C) storage temperature

• 0 to 90% RH, non-condensing



• Calibration accuracy and sensor conformity: ±0.1% of span, ±1°C @ the calibrated ambient temperature and rated line voltage

• Type S: 0.2%

• Type T: below -50°C; 0.2%

• Calibration ambient temperature @ 77°F ±5°F (25°C ±3°C)

• Accuracy span: 1000°F (540°C) min.

• Temperature stability: ±0.1°F/°F (±0.1°C/°C) rise in ambient max.


Agency Approvals

• cULus® UL/EN/CSA C22.2 No 61010-1 Listed, File E185611

• CSA C22.2 No. 24, File 158031

• UL® 50 4X indoor locations, NEMA 4X, IP66 front seal

• FM Class 3545

• CE, RoHS by design, W.E.E.E.


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 20M$ input impedance, 3μA open sensor detection, 2k$ source resistance max.

• RTD 2- or 3-wire, platinum, 100$ @ 32°F (0°C) calibration to DIN curve (0.00385$/$/°C)

• Process, 4-20mA @ 100$, or 0-10VDC @ 20k$ input impedance; scalable


Functional Operating Range.

Type J: -346 to 2192°F (-210 to 1200°C)

Type K: -328 to 2500°F (-200 to 1370°C)

Type T: -328 to 750°F (-200 to 400°C)

Type N: -328 to 2372°F (-200 to 1300°C)

Type S: -58 to 3214°F (-50 to 1767°C)

RTD (DIN): -328 to 1472°F (-200 to 800°C)

Process: -1999 to 9999 units


Output Hardware

• Switched dc = 22 to 32VDC @ 30mA

• Switched dc/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, 5A, 24 to 240VAC or 30VDC max., resistive load, 100,000 cycles at rated load

• Electromechanical relay, Form A, 5A, 24 to 240VAC or 30VDC max., resistive load, 100,000 cycles at rated load

• NO-ARC relay, Form A, 15A, 24 to 240VAC, no VDC, resistive load, 2 million cycles at rated load

• Universal process, Output range selectable:

0 to 10VDC into a min. 1,000$ load

4 to 20mA into max. 800$ load


Operator Interface

• Dual 4 digit, 7 segment LED displays

• Typical display update rate 1Hz

• Advance, RESET, up and down keys plus an EZ-KEY (not available in 1/32 DIN)



EZ-ZONE PM Express Limit Diagrams

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