Watlow PM Specifications

Ideally Suited for
Basic Applications or
Usage Levels

SPECIFICATION SHEET

PM LEGACY™ Panel Mount Controller

1

/32 DIN

Available Soon

The Watlow® 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.

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

Function key

• Enables simple, one-touch operation of user-defined,

repetitive activities

Touch-safe package

• Increases installer and operator safety

• Complies with IP2X requirements

Features and Benefits (con’t)

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

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

• Compiles 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

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

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 with 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)

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

Functional Operating Range

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

• Output 2 is limit for limit models

• NO-ARC relay, Form A, 24 to 240VAC, 15A @ 122°F (50°C),
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; 4 to 20mA ±30µA into max. 800Ω load with 5µA
nominal resolution; temperature stability 100ppm/°C

Operator Interface

• Dual 4 digit, 7 segment LED displays

• Typical display update rate 1Hz

• Advance, infinity (RESET), up and down keys plus a
FUNCTION KEY (not available in 1/32 DIN)

• Infinity key is also labeled RESET on limit control models

• FUNCTION KEY on 1/16 DIN package automatically
programmed as an auto/manual transfer mode function
on PID models.

Typical Block Diagram

2.10 in.

(107.18 mm)

EZ-LINK App

®

250°F

1 2 3

+

4 5 6

7 8 9

+

-

x

/

-

0

User Power

Supply

Fn

Dimensional Drawings

PM LEGACY 1/32 DIN

2.10 in.

(53.34 mm)

1.22 in.

(30.98 mm)

Process

Sensor

Switching

0.40 in.

(10.16 mm)

Power

Device

Heat

Source

LOAD

Limit

Sensor

Safety

Contactor

User Power

Supply

Mounting Panel

PM LEGACY 1/16 DIN

(53.34 mm)

2.10 in.

(53.34 mm)

Mounting Panel

1.38 in.

(35.05 mm)

0.40 in.

(10.16 mm)

1.38 in.

(35.05 mm)

4.22 in.

(107.18 mm)

4.22 in.

Comparison of Available Features

1

⁄32 DIN

PID Loops 1 1

Profile Ramp/Soak 40 total steps None

Full Menu Yes None

Express Menu Yes Yes

Number of Digital Inputs/Outputs 0 to 2 0 to 2

Number of Outputs 1 to 4 1 to 6

Integrated Limits None None

Discrete Limit Yes Yes

Maximum Power Output 5A mechanical relay 15A NO-ARC

Current Measurement None None

Standard Bus Communications Yes Yes

Bluetooth® Technology Yes Yes

Field Bus Communications Modbus® RTU 485 Limit only

10-Point Calibration Offset Yes Yes

Countdown Timer Yes None

1

⁄16 DIN

Compatible Accessories

More information is available on these products at

www.watlow.com

Watlow’s new EZ-LINK™w app allows users

Connected Device

1 EZ-ZONE PM

All Parameters

Value

No

75°F

Active Set Point

0.0%

Heat Power

0.0%

Heat Power

70°F

Active Process

Auto

Control Mode

Control Mode

EZ-Link App at for Android™ or
for iPhone®.

to easily setup, monitor and adjust Watlow
PM PLUS controllers via Bluetooth®. The
app is available free-of-charge from the
app store for phones and tablets,
and provides access to the controller’s
parameters with fully spelled out names
in plain text with help topics that explain
each parameter and option. EZ-LINK
mobile application connects quickly

ContactDeviceAlertsDashboard

ContactDeviceAlertsDashboard

and easily via Bluetooth® wireless
communications. Download the

EZ-LINK

commissioning new controllers including managing the
inputs and outputs from pluggable flex modules, setting up
functions such as control loops and alarms and creating and
editing profiles. COMPOSER software is available for download
at www.watlow.com.

COMPOSER is Watlow’s

easy-to-use software for
configuring and customizing
controllers. Use it to optimize
Watlow’s F4T and PM PLUS
and RM controllers for specific
applications. Task-specific
views simplify all aspects of

SpecView is designed for
industrial users with features
such as data logging, trending
and support for bar code
readers and touch screens. Errors
are reduced, for any process, by
creating application-specific

screens. The software provides a
historical replay option, easy-to-use recipe features and remote
access options, including LAN, Internet and modem.

Silver Series EM touch
screen operator interface
terminals provide a
customizable user
interface, email event
notifications and log and
graph data for Watlow
controllers and other
devices. A Silver Series EM
operator interface terminal
paired with Watlow
controllers is the perfect solution for your industrial
process or machine control application.

PM LEGACY™ Control Configuration Information

① ②

③

Package

Size

④

Primary

Functions

⑤

Power

Supply,

Digital I/O

⑥ ⑦

Output 1 and

2 Hardware

Options

⑧

Comm.

Options

PM

③

3 =1/32 DIN (coming soon)
6 =1/16 DIN

④

C =

PID controller with universal input
PID controller with universal input and profiling ramp/soak

R =

(Not available on 1/16 DIN or Express version)

PID controller with universal input and countdown timer

T =

(Not available on 1/16 DIN or Express version)

J =

PID controller with thermistor input (Not available on

1

/16 DIN or Express version)

PID controller with universal input and profiling ramp/soak

N =

(Not available on 1/16 DIN or Express version)

⑤

1 =

100 to 240VAC

2 =

100 to 240VAC plus 2 digital I/O points (Not available on 1/16

Power Supply, Digital Inputs/Outputs (I/O)

DIN or Express version)

3 =

20 to 28VAC or 12 to 40VDC
20 to 28VAC or 12 to 40VDC, plus 2 digital I/O points (Not

4 =

available on 1/16 DIN or Express version)

⑦

⑥

Output 1 and 2 Hardware Options

Output 1 Output 2

CA =

Switched dc/open collector None

CH* =

Switched dc/open collector NO-ARC 15A power control

CC =

Switched dc/open collector Switched dc

CJ =

Switched dc/open collector Mechanical relay 5A, Form A

CK =

Switched dc/open collector SSR Form A, 0.5A

EA =

Mechanical relay 5A, Form C None

EH* =

Mechanical relay 5A, Form C NO-ARC 15A power control

EC =

Mechanical relay 5A, Form C Switched dc

EJ =

Mechanical relay 5A, Form C Mechanical relay 5A, Form A

EK =

Mechanical relay 5A, Form C SSR Form A, 0.5A

FA =

Universal process None

FC =

Universal process Switched dc

FJ =

Universal process Mechanical relay 5A, Form A

FK =

Universal process SSR Form A, 0.5A

AK =

None SSR Form A, 0.5A

KH* =

SSR Form A, 0.5A NO-ARC 15A power control

KK =

SSR Form A, 0.5A SSR Form A, 0.5A

*CH, EH, KH - Not available with the 1/32 DIN (PM3) package size.

Package Size

Primary Functions

⑨ ⑩ ⑪

Future

Options

A A A

⑫

Model

Selection

⑧

⑬ ⑭

Custom
Options

Communication Options

Standard bus always included

A =

None
Bluetooth®

B =
E =

EIA-85 Modbus® RTU and Bluetooth® (Not available on

1

/16 DIN or Express version)

1 =

EIA-485 Modbus® RTU (Not available on 1/16 DIN or Express

version)

Note: Bluetooth® not available in all countries, contact factory.

⑫

Model Selection

N = PM LEGACY Version (Only available in PM3) (Input 1 always

isolated)

H = PM LEGACY EXPRESS Version (Available in PM3 or PM6)

(Input 1 always isolated)

⑭

⑬

WP =

Watlow logo face plate
No logo/no name face plate

WN

=

Conformal coating

AG =

12 =

Class 1, Div. 2 (not available with mechanical relay Output

Custom Options

Types E, H or J)

PM LEGACY Limit Model Configuration Information

① ②

③

Package

Size

④

Primary

Functions

⑤

Power

Supply,

Digital I/O

⑥ ⑦

Output 1 and

2 Hardware

Options

PM

③

3 =1/32 DIN (coming soon)
6 =1/16 DIN

④

L =

Limit controller with universal input
Limit controller with thermistor input

M =

⑤

100 to 240VAC

1 =
2 =

100 to 240VAC plus 2 digital I/O points (Not available on

Power Supply, Digital Inputs/Outputs (I/O)

Express version)

3 =

20 to 28VAC or 12 to 40VDC

4 =

20 to 28VAC or 12 to 40VDC, plus 2 digital I/O points (Not

available on Express version)

⑦

⑥

Output 1 and 2 Hardware Options

Output 1 Output 2

AJ =

None

CJ =

Switched dc/open collector Mechanical relay 5A, Form A

EJ =

Mechanical relay 5A, Form C Mechanical relay 5A, Form A

⑧

Standard bus always included

A =

None

B =

Bluetooth®

E = EIA-485 Modbus® RTU and Bluetooth®

Express version)

F =

Modbus® RTU 232/485 and Bluetooth® (Not available on

PM3 or Express version)

G =

EtherNet/IP™/Modbus® TCP and Bluetooth® (Not available

on PM3 or Express version)

H =

DeviceNet™ and Bluetooth® (Not available on PM3 or

Express version)

J =

PROFIBUS DP and Bluetooth® (Not available on PM3 or

Express version)

1 =

EIA-485 Modbus® RTU (Not available on Express version)

2 =

EIA-232/485 Modbus® RTU (Not available on PM3 or Express
version)

3 =

EtherNet/IP™/Modbus® TCP (Not available on PM3 or

Express version)

5 =

DeviceNet™ (Not available on PM3 or Express version)
PROFIBUS DP

6 =

(Not available on PM3 or Express version)

Note: Bluetooth® not available in all countries, contact factory.

Package Size

Primary Functions

Mechanical relay 5A, Form A

Communication Options

(Not available on

⑧

Comm.

Options

⑨

Future
Option

A

Watlow® and EZ-ZONE® are registered trademarks of Watlow Electric Manufacturing
Company.
SMOOTH-TOUCH™, EZ-LINK™ and PM LEGACY™ are trademarks of Watlow Electric
Manufacturing Company.
UL® and cUL® are registered trademarks of Underwriter’s Laboratories, Inc.
i-Phone® is a registered trademark of Apple Corporation.
Android™ is a trademark of Google LLC.

⑩ ⑪

⑫

⑬ ⑭

Output 3 and

4 Hardware

Options

⑩

⑪

Model

Selection

Output 3 and 4 Hardware Options

Custom
Options

Output 3 Output 4

AA =

None None

AJ =

None Mechanical relay 5A, Form A

AK =

None SSR Form A, 0.5 A

CA =

Switched dc/open collector None

CC =

Switched dc/open collector Switched dc

CJ =

Switched dc/open collector Mechanical relay 5A, Form A

CK =

Switched dc/open collector SSR Form A, 0.5 A

EA =

Mechanical relay 5A, Form C None

EC =

Mechanical relay 5A, Form C Switched dc

EJ =

Mechanical relay 5A, Form C Mechanical relay 5A, Form A

EK =

Mechanical relay 5A, Form C SSR Form A, 0.5A

FA =

Universal process None

FC =

Universal process Switched dc

FJ =

Universal process Mechanical relay 5A, Form A

FK =

Universal process SSR Form A, 0.5A

KK =

SSR Form A, 0.5A SSR Form A, 0.5A

Note: Only available on 1/16 DIN models if communication Options F,
G, H, J or 2 thru 6 is ordered in previous digit, then Option AA must
be ordered here.

⑫

Model Selection

G = PM LEGACY Version (Input 1 always isolated)
H = PM LEGACY EXPRESS Version (Available in PM3 or PM6)

(Input 1 always isolated)

⑭

⑬

WP =

Watlow logo face plate
No logo/no name face plate

WN

=

Conformal coating

AG =

Custom Options

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