Month: July 2026

The EZ-ZONE RM controller simplifies thermal system

management. The EZ-ZONE RM controller family is

comprised of six module types: An integrated on-off or

PID control, monitoring and over/under temperature limit

module, a high-density on-off or PID control module,

a high-density limit only module, an input/output (I/O)

expansion module, a high-density monitor/scanner

module and a data logging and field communications

access module. A system is configured by connecting

any combination of module types to address specific

application needs. The EZ-ZONE RM is extremely flexible

and scalable allowing mixing and matching of I/O to

configure one to 152 control loops and up to 256

monitor points.

Now Watlow’s EZ-ZONE RM is available through

Watlow SELECT®, a program that enables you to quickly

identify, configure and receive your thermal products

faster and easier than ever before. 

Optional integrated controller functions can be

combined or ordered in different quantities:

• PID control loops

• Over/under temperature limit control loops

• 10 and 15 ampere power output/heater driver options

• On-board data logging

• Current measurement input

• Sequencer start up and control function

• Programmable timer and counter functions

• Programmable math and logic options

• Multiple communication protocol options

• Mobile configuration with removable secure digital (SD)

flash card

Controller

• 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.

• Non-isolated to switched dc and process output

• RTD 2- or 3-wire, platinum, 100Ω @ 0°C calibration to

DIN curve (0.00385 Ω/Ω/°C)

• Process, 4-20mA @ 100Ω, or 0-10VDC @ 20kΩ input

impedance; scalable

High-amperage power control output (1/16 DIN only)

• Drives 15 ampere resistive loads direct

• Reduces component count

• Saves panel space and simplifies wiring

• Reduces cost of ownership

PM LEGACY™

Specifications

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)

• Data retention upon power failure via non-volatile

memory

• Compliant SEMI F47-0200, Figure R1-1 voltage sag

requirements @ 24VAC or higher

Environment

• 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

Accuracy

• 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,

IP67 front seal

• cULus® ANSI/ISA 12.12.01-2007, CSA-C22.2 No.

213-1987, Class 1, Div. 2, Groups A, B, C and D,

temperature code T4A, File E184390 (optional)

• CE, RoHS by design, W.E.E.E.

• FM Class 3545 (limit controls)

The PM LEGACY™ series panel mount controller is an

industry leading PID controller that allows optimal performance

utilizing simple control and menu functionality

without complex features. It is ideally suited for basic

applications and usage levels.

The LEGACY 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.

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

P3T armor sealing system

• Complies to NEMA 4X, IP66 and IP67 specifications

• Allows controller to be cleaned and washed

• Certified UL® 50 independent to NEMA 4X

specification

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

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 experienced with

more advanced controllers and unnecessary features

• Reduces user training costs and user programming

errors

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

• 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

Touch-safe package

• Increases installer and operator safety

• Complies with IP2X requirements

EZ-LINK™ mobile application for iPhone® and

Android™

• Expedites controller setup with intuitive navigation

• Simplifies setting parameters with plain text names and

descriptions

• Connects quickly and easily via Bluetooth® wireless

communications

SMOOTH TOUCH™ keypad

• Eliminates contamination points on the front of the

controller

• Prevents premature failure of mechanical components

• Creates a better seal on front panel

• Ensures an easy to clean surface

Specifications for Basic Remote User Interface (RUI)

Operator Interface

• Dual 4 digit, 7 segment LED displays

• Forward, backward, up and down keys plus a customer

programmable function key – EZ key

• Typical display update rate: 1Hz

• Agency approved to IP65/NEMA 4X

• Standard bus (ships with all units). Options:

EIA 232/485 Modbus® RTU, EtherNet/IP™/TCP Modbus®

or DeviceNet™, PROFIBUS DP

Line Voltage/Power

• 100 to 240VAC, +10/-15%; (85-264VAC) 50/60Hz, ±5%

• 24VAC/VDC, +10/-15%; 50/60Hz, ±5%

Agency Approvals

• UL®, CSA, CE, RoHS, W.E.E.E.

EZ-ZONE® Remote User Interface (RUI) Provides Keypad and Display

Access to Parameters in EZ-ZONE RMs and EZ-ZONE STs and Features

Communication Gateway Options

Features and Benefits

Ability to communicate with programmable logic controller

(PLC), personal computer (PC) or operator interface (OIT)

• Optional EIA 485 Modbus® RTU

• RUI/communications gateway with optional EIA 232/485

Modbus® RTU, EtherNet IP™/TCP Modbus®, DeviceNet™ or

PROFIBUS DP

Provides user interface for EZ-ZONE products

• Supports menu navigation and access to parameter settings

in EZ-ZONE RM modules and EZ-ZONE ST controllers

User-customizable EZ key

• Executes the user-selected EZ key option in the selected

device

Supports EZ-ZONE password protection

• Presents menus from connected EZ-ZONE products

according to the customizable read and write lock settings

and requires password if that feature is enabled in the

product