Watlow ez-zone pm User manual

0600-0059-0000 Rev. P Made in the U.S.A.
August 2016
User’s Guide
EZ-ZONE®PM
Integrated Controller Models
1241 Bundy Boulevard., Winona, Minnesota USA 55987
Phone: [phone], Fax: [phone]
http://www.watlow.com
TOTAL
3 Year Warranty
CUSTOMER
SATISFACTION
Registered Company
Winona, Minnesota USA
ISO 9001

Safety Information
We use note, caution and warning symbols throughout this book to draw your attention to
important operational and safety information.
• A “NOTE” marks a short message to alert you to an important detail.
• A “CAUTION” safety alert appears with information that is important for protecting your
equipment and performance. Be especially careful to read and follow all cautions that
apply to your application.
• A “WARNING” safety alert appears with information that is important for protecting you,
others and equipment from damage. Pay very close attention to all warnings that apply to
your application.
• The safety alert symbol, (an exclamation point in a triangle) precedes a general
CAUTION or WARNING statement.
• The electrical hazard symbol, (a lightning bolt in a triangle) precedes an electric shock
hazard CAUTION or WARNING safety statement. Further explanations follow:
Symbol Explanation
CAUTION – Warning or Hazard that needs further explanation than
label on unit can provide. Consult User's Guide for further informa-
tion.
ESD Sensitive product, use proper grounding and handling techniques
when installing or servicing product.
Unit protected by double/reinforced insulation for shock hazard pre-
vention.
Do not throw in trash, use proper recycling techniques or consult
manufacturer for proper disposal.
Enclosure made of Polycarbonate material. Use proper recycling
techniques or consult manufacturer for proper disposal.
Unit can be powered with either alternating current (ac) voltage or
direct current (dc) voltage.
Unit is a Listed device per Underwriters Laboratories®. It has been
evaluated to United States and Canadian requirements for Process
Control Equipment. UL 61010 and CSA C22.2 No. 61010. File E185611
QUYX, QUYX7. See: www.ul.com
Unit is a Listed device per Underwriters Laboratories®. It has been
evaluated to United States and Canadian requirements for Hazardous
Locations Class 1 Division II Groups A, B, C and D. ANSI/ISA 12.12.01-
2007. File E184390 QUZW, QUZW7. See: www.ul.com

Unit is compliant with European Union directives. See Declaration of
Conformity for further details on Directives and Standards used for
Compliance.
Unit has been reviewed and approved by Factory Mutual as a
Temperature Limit Device per FM Class 3545 standard. See: www.
fmglobal.com
Unit has been reviewed and approved by CSA International for use as
Temperature Indicating-Regulating Equipment per CSA C22.2 No. 24.
See: www.csa-international.org
Unit has been reviewed and approved by ODVA for compliance with
DeviceNet communications protocol. See: www.odva.org
Unit has been reviewed and approved by ODVA for compliance with
Ethernet/IP communications protocol. See: www.odva.org
Warranty
The EZ-ZONE®PM is manufactured by ISO 9001-registered processes and is backed by a
three-year warranty to the first purchaser for use, providing that the units have not been
misapplied. Since Watlow has no control over their use, and sometimes misuse, we cannot
guarantee against failure. Watlow's obligations hereunder, at Watlow's option, are limited to
replacement, repair or refund of purchase price, and parts which upon examination prove to
be defective within the warranty period specified. This warranty does not apply to damage
resulting from transportation, alteration, misuse or abuse. The purchaser must use Watlow
parts to maintain all listed ratings.
Technical Assistance
If you encounter a problem with your Watlow controller, review your configuration infor-
mation to verify that your selections are consistent with your application: inputs, outputs,
alarms, limits, etc. If the problem persists, you can get technical assistance from your local
Watlow representative (see back cover), by e-mailing your questions to wintechsupport@wat-
low.com or by dialing [phone] between 7 a.m. and 5 p.m., Central Standard Time
(CST). Ask for for an Applications Engineer. Please have the following information available
when calling:
• Complete model number
• All configuration information
• User’s Guide
• Factory Page
Return Material Authorization (RMA)
1. Call Watlow Customer Service, [phone], for a Return Material Authorization (RMA)
number before returning any item for repair. If you do not know why the product failed,
contact an Application Engineer or Product Manager. All RMA’s require:
• Ship-to address
• Bill-to address
• Contact name

• Phone number
• Method of return shipment
• Your P.O. number
• Detailed description of the problem
• Any special instructions
• Name and phone number of person returning the product.
2. Prior approval and an Return Merchandise Authorization number from the Customer
Service Department is required when returning any product for credit, repair or evalua-
tion. Make sure the Return Merchandise Authorization number is on the outside of the car-
ton and on all paperwork returned. Ship on a Freight Prepaid basis.
3. After we receive your return, we will examine it and try to verify the reason for returning
it.
4. In cases of manufacturing defect, we will enter a repair order, replacement order or issue
credit for material returned. In cases of customer misuse, we will provide repair costs and
request a purchase order to proceed with the repair work.
5. To return products that are not defective, goods must be in new condition, in the origi-
nal boxes and they must be returned within 120 days of receipt. A 20 percent restocking
charge is applied for all returned stock controls and accessories.
6. If the unit cannot be repaired, you will receive a letter of explanation and be given the
option to have the unit returned to you at your expense or to have us scrap the unit.
7. Watlow reserves the right to charge for no trouble found (NTF) returns.
This EZ-ZONE®PM User’s Guide is copyrighted by Watlow Electric, Inc., © August 2016 with all
rights reserved.
EZ-ZONE PM is covered by U.S. Patent Numbers: 6005577; D553095; D553096; D553097;
D560175; D55766; and OTHER PATENTS PENDING

Watlow EZ-ZONE®PMI Controller •1 • Table of Contents
Table of Contents
TC
Table of Contents ..................................1
Chapter 1: Overview ................................6
Available EZ-ZONE PM Literature and Resources ...................6
Introduction ...............................................7
Getting Started Quickly .......................................9
A Conceptual View of the PM .................................10
Inputs .................................................10
Internal Functions ........................................11
Outputs ................................................11
Input Events and Output Events .............................11
What is a Profile .........................................11
Chapter 2: Install and Wire...........................20
Dimensions...............................................20
1/16 DIN (PM6) Dimensions ...............................20
1/16 DIN (PM6) Recommended Panel Spacing .................20
1/8 DIN (PM8) Vertical Dimensions ..........................21
1/8 DIN (PM8) Vertical Recommended Panel Spacing............21
1/8 DIN (PM9) Horizontal Recommended Panel Spacing..........22
1/4 DIN (PM4) Dimensions ................................23
1/4 DIN (PM4) Recommended Panel Spacing ..................23
Installation ...............................................24
Wiring ...................................................26
PM Integrated Isolation Block.................................30
Chapter 3: Keys and Displays .........................55
Responding to a Displayed Message .........................56
Default Home Page Parameters ...............................57
Chapter 4: Home Page..............................57
Changing the Set Point ....................................59
Starting a Profile from the Home Page........................59
Ending a Profile from the Home Page ........................59
Modifying the Home Page .................................59
Conventions Used in the Menu Pages ........................63
Display ................................................64
Communication Protocols .................................64
Modbus Introduction to the Modbus Protocol ..................64
J1939 CAN .............................................65
Profibus DP ............................................66
Chapter 5: Operations Page ..........................67
Analog Input Menu .........................................70
Digital Bus Menu (J1939 CAN)................................71
Linearization Menu .........................................72

Watlow EZ-ZONE®PMI Controller •2 • Table of Contents
TC Table of Contents (cont.)
Process Value Menu ........................................73
Digital Input/Output Menu ...................................74
Limit Menu ...............................................75
Monitor Menu .............................................76
Control Loop Menu.........................................77
Alarm Menu ..............................................81
Current Menu .............................................83
Timer Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Math Menu ...............................................87
Special Output Function Menu ................................87
Profile Status Menu ........................................89
Chapter 6: Setup Page ..............................92
Analog Input Menu .........................................96
Digital Bus Menu (J1939 CAN)................................99
Linearization Menu ........................................103
Process Value Menu .......................................107
Digital Input/Output Menu ..................................108
Limit Menu ..............................................114
Control Loop Menu........................................116
Output Menu.............................................125
Alarm Menu .............................................128
Current Menu ............................................133
Timer Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Math Menu ..............................................137
Special Output Function Menu ...............................138
Function Key .............................................140
Global Menu .............................................142
Communications Menu.....................................145
Standard Bus ..........................................146
Modbus RTU...........................................146
DeviceNet .............................................148
J1939 CAN bus (Digital Input Bus)..........................149
Profibus DP ...........................................150
Modbus TCP or EtherNet/IP ...............................151
Real Time Clock Menu .....................................155
Chapter 7: Profiling Page ...........................156
Profile Setup .............................................156
Starting a Profile..........................................157
Profiling Menu ...........................................161
Chapter 8: Factory Page............................168
Custom ................................................170

Watlow EZ-ZONE®PMI Controller •3 • Table of Contents
Lock Menu ..............................................171
Unlock Menu.............................................173
Diagnostics Menu .........................................174
Calibration Menu..........................................176
Chapter 9: Features...............................179
Changing PM Integrated Model Number to PM Express ..........181
Saving and Restoring Settings..............................182
Tuning the PID Parameters ................................183
Autotune .............................................183
Manual Tuning ........................................184
Autotuning with TRU-TUNE+®..................................184
Inputs.................................................185
Calibration Offset ......................................185
Calibration............................................186
Filter Time Constant ....................................188
Sensor Selection.......................................188
Sensor Backup ........................................188
Set Point Minimum and Maximum .........................188
Scale High and Scale Low ...............................188
Range High and Range Low ..............................189
Receiving a Remote Set Point ............................189
Ten Point Linearization ..................................190
Outputs ...............................................190
Duplex...............................................190
NO-ARC Relay.........................................190
Retransmitting a Process Value or Set Point .................191
Cool Output Curve .....................................192
Resetting a Tripped Limit..................................192
Control Methods ........................................193
Output Configuration ...................................193
Auto (closed loop) and Manual (open loop) Control. . . . . . . . . . . . 193
On-Off Control ........................................194
Proportional and (P) Control .............................195
Proportional and Integral (PI) Control ......................195
Proportional, Integral and Derivative (PID) Control ............196
Dead Band ...........................................196
Variable Time Base .....................................197
TC Table of Contents (cont.)

Watlow EZ-ZONE®PMI Controller •4 • Table of Contents
Table of Contents (cont.)
Single Set Point Ramping................................198
Cascade Control .......................................198
Compressor Control ....................................198
Differential Control .....................................199
Ratio Control..........................................199
Duplex Control ........................................199
Motorized Valve Control .................................199
Timer Function..........................................200
Setting up the timer function .............................200
Alarms ................................................202
Process and Deviation Alarms ............................203
Set Points ............................................203
Hysteresis ............................................203
Latching .............................................203
Silencing .............................................204
Blocking .............................................204
Current Sensing.........................................204
Open and Shorted Load Circuit Detection....................204
Open Loop Detection ...................................205
Programming the EZ Key/s ................................205
Using Lockout and Password Security .......................206
Using Lockout Method 1 (Read and Set Lock)................206
Using Lockout Method 2 (Password Enable) .................208
Modbus - Using Programmable Memory Blocks................210
CIP - Communications Capabilities ..........................210
CIP Implicit Assemblies .................................211
PCCC - (Programmable Controller Communications Commands) ..212
Profibus DP - (Decentralized Peripherals) ....................213
Software Configuration ...................................213
Using EZ-ZONE Configurator Software ......................213
Chapter 10: Applications ...........................217
Example 1: Single Loop Control ..............................217
Example 2: Sensor Backup ..................................217
Example 3: Square Root ....................................218
Example 4: Ratio..........................................218
Example 5: Differential .....................................219
Example 6: Cascade .......................................219
Example 7: Wet Bulb / Dry Bulb ..............................221
TC

Watlow EZ-ZONE®PMI Controller •5 • Table of Contents
Table of Contents (cont.)
TC
Example 8: Vaisala ........................................222
Example 9: Motorized Valve Control ...........................223
Chapter 11: Appendix .............................225
Troubleshooting Alarms, Errors and Control Issues ...............225
Modbus - Programmable Memory Blocks ......................232
CIP Implicit Assembly Structures .............................235
CIP Implicit Assembly....................................235
Originator (Master) to Target (PM)..........................235
CIP Implicit Assembly....................................236
Target (PM) to Originator (Master) ..........................236
Compact Class Assembly Structure ...........................237
PM Specifications .........................................244
Ordering Information for PM Integrated Controller Models .........250
How to Reach Us .........................................252

Watlow EZ-ZONE®PMI Controller •6 •Chapter 1 Overview
Chapter 1: Overview
1
Available EZ-ZONE PM Literature and Resources
Document Title and Part Number Description
EZ-ZONE PM PID Controller Us-
er's Guide, part number: 0600-
0058-0000
Describes how to connect and use an advanced PID loop
controller. This particular model is limited to one con-
trol loop and 2 outputs. Like all PM controllers, it comes
with Standard Bus communications. As an additional
option, it can also be ordered with Modbus®RTU com-
munications.
EZ-ZONE PM Limit (PML) User's
Guide, part number: 0600-
0057-0000
This document describes how to protect against un-
wanted thermal runaway and over temperature condi-
tions through proper configuration, programming. Like
all PM controllers, it comes with Standard Bus communi-
cations. As an additional option, it can also be ordered
with various fieldbus communications protocols.
EZ-ZONE Remote User Interface
(RUI) User's Guide, part num-
ber: 0600-0060-0000
The RUI provides a visual remote LED display for the
PM/RM configuration and setup menus. This document
illustrates and describes connections and also describes
the Home Page for each EZ-ZONE device as viewed from
the RUI.
EZ-ZONE PM Specification
Sheet, part number: wine-
zpm0516
Describes the PM family hardware options, features,
benefits and technical specifications.
Watlow Support Tools DVD,
part number: 0601-0001-0000
Contains all related user documents, tutorial videos, ap-
plication notes, utility tools, etc...
The DVD described above ships with the product and as stated contains all of the literature
above as well as much more. If the DVD is not available one can be acquired by contacting
Watlow Customer Service at 1-507-454-5300.
As an alternative to the DVD, all of the user documentation described above can also be
found on the Watlow website. Click on the following link to nd your document of choice:
http://www.watlow.com/en/resources-and-support/Technical-Library/User-Manuals. Once
there, simply type in the desired part number (or name) into the search box and download
free copies. Printed versions of all user documents can also be purchased here as well.
Your Comments are Appreciated
In an effort to continually improve our technical literature and ensure that we are providing
information that is useful to you, we would very much appreciate your comments and sug-
gestions. Please send any comments you may have to the following e-mail address:
[e-mail]

Watlow EZ-ZONE®PMI Controller •7 •Chapter 1 Overview
Introduction
The EZ-ZONE®PM takes the pain out of solving your thermal loop requirements. Watlow’s
EZ-ZONE PM controllers offer options to reduce system complexity and the cost of control
loop ownership. You can order the EZ-ZONE PM as a PID controller or an over-under limit con-
troller, or you can combine both functions in the PM Integrated Controller. You now have the
option to integrate a high-amperage power controller output, an over-under limit controller
and a high-performance PID controller all in space saving, panel-mount packages. You can
also select from a number of industrial serial communications options to help you manage
system performance.
Standard Features and Benefits
Advanced PID Control Algorithm
• TRU-TUNE+
®
Adaptive tune provides tighter control for demanding applications.
• Auto Tune for fast, efficient start ups
EZ-ZONE configuration communications and software
• Saves time and improves the reliability of controller set up
FM Approved Over-under Limit with Auxiliary Outputs
• Increases user and equipment safety for over-under temperature conditions
• To meet agency requirements, output 4 is the fixed limit output. Other outputs can be
configured to mirror the limit output (4).
Parameter Save & Restore Memory
• Reduces service calls and down time
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
EZ-Key/s
• Programmable EZ-Key enables simple one-touch operation of repetitive user activities
Programmable Menu System
• Reduces set up time and increases operator efficiency
Three-year warranty
• Demonstrates Watlow's reliability and product support
Touch-safe Package
• IP2X increased safety for installers and operators
P3T Armor Sealing System
• NEMA 4X and IP65 offers water and dust resistance, can be cleaned and washed down (in-
door use only)
• Backed up by UL 50 independent certification to NEMA 4X specification

Watlow EZ-ZONE®PMI Controller •8 •Chapter 1 Overview
Removable cage clamp wiring connectors
• Reliable wiring, reduced service calls
• Simplified installation
Heat-Cool Operation
• Provides application flexibility with accurate temperature and process control
Optional Features and Benefits
High-amperage Power Control Output
• Drives 15 amp resistive loads directly
• Reduces component count
• Saves panel space and simplifies wiring
• Reduces the cost of ownership
Integrated PID and Limit Controller
• Reduces wiring time and termination complexity compared to connecting discrete products
• Decreases required panel space
• Lowers installation costs
• Increases user ad equipment safety for over/under temperature conditions
Current Monitoring
• Detects heater current flow and provides alarm indication of a failed output device or
heater load
Communications Capabilities
• Provides a wide range of protocol choices including Modbus®RTU, EtherNet/IPTM, PCCC
(Programmable Controller Communications Commands), DeviceNetTM, Modbus®TCP, and
Profibus DP
• Supports network connectivity to a PC or PLC
Dual Channel Controller
• For selected models provides two PID controllers in one space saving package
Enhanced Control Capabilities
• Easily handle complex process problems such as cascade, ratio, differential, square-root,
motorized valve control without slidewire feedback, wet-bulb/dry-bulb and compressor
control
Full-featured Alarms
• Improves operator recognition of system faults
• Control of auxiliary devices
Ten Point Linearization Curve
• Improves sensor accuracy
Remote Set Point Operation
• Supports efficient set point manipulation via a master control or PLC

Watlow EZ-ZONE®PMI Controller •9 •Chapter 1 Overview
Retransmit Output
• Supports industry needs for product process recording
Profile Capability
• Pre-programmed process control
• Ramp and soak programming with four files and 40 total steps
Getting Started Quickly
The PM control has a page and menu structure that is listed below along with a brief descrip-
tion of its purpose.
Setup Page
Push and hold the up and down keys
(¿¯) for 6 seconds to enter. (See the
Setup Page for further information)
Once received, a user would want to setup
their control prior to operation. As an example,
define the input type and set the output cycle
time.
Operations Page
Press and hold the up and down keys (¿
¯) for 3 seconds to enter. (See the Op-
erations Page for further information)
After setting up the control to reflect your
equipment, the Operations Page would be used
to monitor or change runtime settings. As an
example, the user may want to see how much
time is left in a profile step or perhaps change
the high set point of the limit.
Factory Page
Press and hold the Infinity and the green
Advance Keys (ˆ‰) for 6 seconds to
enter. (See the Factory Page for further
information)
For the most part the Factory Page has no
bearing on the control when running. A user
may want to enable password protection, view
the control part number or perhaps create a
custom Home Page.
Home Page
The control is at the Home Page when
initially powered up.
Pushing the green Advance Key ‰will allow
the user to see and change such parameters as
the control mode, enable autotune and idle set
point to name a few.
Profile Page
Press and hold the green Advance Key ‰
for 6 seconds to enter. (See the Profile
Page for further information)
If equipped with this feature a user would want
to go here to configure a profile.
The default PM loop conguration out of the box is shown below:
• Analog Input functions set to thermocouple, type J
• Heat algorithm set for PID, Cool set to off
• Output 1 set to Heat
• Control mode set to Auto
• Set point set to 75 °F
If you are using the input type shown above, simply connect your input and output devices
to the control. Power up the control and push the up arrow ¿on the face of the control to
change the set point from the default value of 75°F to the desired value. As the Set Point
increases above the Process Value, output 1 will come on and it will now begin driving your
output device. The PV function as shown in the graphic below is only available with PM4/8/9
models.

Watlow EZ-ZONE®PMI Controller •10 •Chapter 1 Overview
Note:
The output cycle time will have a bearing on the life of mechanical relay outputs and can
be different based on the type of output ordered. The output cycle time can be changed
in the Setup Page under the Output Menu.
EZ-ZONE PM Default Configuration
Heat
Thermocouple Type J
Analog Input 1
PID
Controller
Heat
Loop 1
Input Sensor
Output
Function
Input
Function
Output 1
Process
Value
(PV)
Function
Off
A Conceptual View of the PM
The exibility of the PM software and hardware allows for a large range of congurations.
Acquiring a better understanding of the controller’s overall functionality and capabilities
while at the same time planning out how the controller can be used will deliver maximum
effectiveness in your application.
It is useful to think of the controller in terms of functions; there are internal and external
functions. An input and an output would be considered external functions where the limit,
PID or alarm function would be an internal function. Information ows from an input func-
tion to an internal function to an output function when the controller is properly congured.
A single PM controller can carry out several functions at the same time, for instance (but not
limited to), PID control, checking for a limit condition, monitoring for several different alarm
situations, etc... To ensure that the application requirements are being met, it is important
to rst give thought to each external process and then conguring the controller’s internal
functions to properly accommodate the application requirements.
Inputs
The inputs provide the information that any given programmed procedure can act upon. In a
simple form, this information may come from an operator pushing a button or from a sensor
monitoring the temperature of a part being heated or cooled.
Each analog input typically uses a thermocouple or RTD to read the process temperature. It
can also read volts, current or resistance, allowing it to use various devices to read a wide
array of values.
A PM with digital input/output (DIO) hardware includes two sets of terminals where each of
which can be used as either an input or an output. Each pair of terminals must be congured
to function as either an input or output with the direction parameter in the Digital Input/
Output Menu (Setup Page). Each digital input reads whether a device is active or inactive.
The Function or EZ Key/s (PM4/6/8/9 only) on the front panel of the PM also operates as a
digital input by toggling the function assigned to it in the Digital Input Function parameter in
the Function Key Menu (Setup Page).

Watlow EZ-ZONE®PMI Controller •11 •Chapter 1 Overview
Internal Functions
The controller will use input signals to calculate a value and then perform an operation. A
sample of some functions may be as simple as:
• Compare an input value to the set point and calculate the optimal power for a heater
• Detect a failure of the primary sensing device and trip a contactor to remove power from
the heating element
• Reading a digital input to set a state to true or false
• Evaluate an incoming temperature to determine an alarm state (on or off)
To set up a function, it’s important to dene the source, or instance, to use. For example, if
the control is equipped with DIO they can be congured to respond to an alarm. If congured
as such, the digital output must be tied to the desired alarm instance (1 to 4). Using this as
an example, the Function for the digital output would be dened as an Alarm where the In-
stance would be selected as 1, 2, 3, or 4 corresponding to the alarm instance that will drive
the output.
Keep in mind that a function is a user-programmed internal process that does not execute
any action outside of the controller. To have any effect outside of the controller, an output
must be congured to respond to a function.
Outputs
Outputs can perform various functions or actions in response to information provided by a
function such as, removal of the control voltage to a contactor; operating a heater, turning a
light on or off, unlocking a door, etc...
Assign a Function to any available output on the Setup Page within the Output Menu or Digi-
tal Input/Output Menu. Then select which instance of that function will drive the selected
output. For example, you might assign an output to respond to alarm 4 (instance 4).
You can assign more than one output to respond to a single instance of a function. For ex-
ample, alarm 2 could be used to trigger a light connected to output 1 and a siren connected
to digital output 5.
Input Events and Output Events
Input and output events are internal states that are used exclusively by proles. The source
of an event input can come from a real-world digital input or an output from another func-
tion. Likewise, event outputs may control a physical output such as an output function block
or be used as an input to another function.
What is a Profile
A prole is a set of instructions consisting of a sequence of steps. When a prole runs, the
controller automatically executes its steps in sequence. The step type determines what ac-
tion the controller performs. Steps can change temperatures and other process values gradu-
ally over time, maintain the temperatures and process values for specic periods, or repeat
a sequence of steps numerous times. At each step the prole can activate or deactivate
outputs that control other equipment. Also a step can have the controller wait for specic
conditions before proceeding such as, waiting for a switch closure and/or a specic process
value to be detected by a sensor.

Watlow EZ-ZONE®PMI Controller •12 •Chapter 1 Overview
EZ-ZONE®PM Integrated Model 1/16 DIN System Diagram
With a Current Transformer, Without Communications Card (Slot B)
Note:
Number of inputs and outputs and various combinations of the same will vary
depending upon part number; see ordering matrix for more detail.
EZ Key
Programmable Event
Digital Output (or Input) 5 & 6
(optional) none, switched dc
Digital Input (or Output) 5 & 6
(optional) none, switch, volts dc
Current
Transformer
Board
(optional)
Slot B
Inputs Outputs
- None
- Idle set point
- Tune
- Alarm clear, request
- Force alarm
- Silence alarm
- Manual/auto mode
- Control outputs off
- Remote set point
enable
- Lock keypad
- TRU-TUNE+
®
disable
- Loop & alarms off
- Profile disable
- Profile hold/resume
- Profile start
- Profile start/stop
- Restore user settings
- Event inputs
Output Status
5
1
3
2
4
Indicates Zone
Address
Indicates I/O
Status
Zone
Address
Analog Input 1
none, Thermocouple, RTD (100Ω,
1kΩ), Thermistor 5kΩ, 10kΩ, 20kΩ,
40kΩ) Process (V, mV, mA) or 1k
Potentiometer
Output 1
none, switched dc/open collector, 5A
mechanical relay (form C), process
(V, mA), or 0.5A SSR (form A)
Output 2
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
Analog Input 2
Current Transformer
PID
Controller
(Optional -
Ramp/Soak max 4
files, 40 steps)
Slot A
(Optional)
Input Sensor
off, heat, cool
alarm, retransmit,
duplex, event
off, heat, cool
alarm, event
off, heat, cool
alarm, retransmit,
duplex, event
off, heat, cool
alarm, event
off, heat, cool
alarm, event
Modbus
Address
1 - 247
Standard Bus
Zone Address
1 - 16
Supervisory &
Power Board
Slot C
Current
Transformer
EIA-485 Communication
Standard Bus
(optional Modbus RTU)
RUI, EZ-ZONE
Controllers, PLC, PC
or HMI
Output 3
none, switched dc/open collector, 5A
mechanical relay (form C), process
(V, mA), or 0.5A SSR (form A)
Output 4
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
6
Current Monitoring
• Detects heater current flow
• Provides an alarm indication of a failed-load issue.

Watlow EZ-ZONE®PMI Controller •13 •Chapter 1 Overview
EZ-ZONE®PM Integrated Model 1/16 DIN System Diagram
With Auxillary Input, Without Communications Card (Slot B)
Note:
Number of inputs and outputs and various combinations of the same will vary
depending upon part number; see ordering matrix for more detail.
EZ Key
Programmable Event
Digital Output (or Input) 5 & 6
(optional) none, switched dc
Digital Input (or Output) 5 & 6
(optional) none, switch, volts dc
Auxillary
Input
(optional)
Slot B
Inputs Outputs
- None
- Idle set point
- Tune
- Alarm clear, request
- Force alarm
- Silence alarm
- Manual/auto mode
- Control outputs off
- Remote set point
enable
- Lock keypad
- TRU-TUNE+
®
disable
- Loop & alarms off
- Profile disable
- Profile hold/resume
- Profile start
- Profile start/stop
- Restore user settings
- Event inputs
Output Status
5
1
3
2
4
Indicates Zone
Address
Indicates I/O
Status
Zone
Address
Analog Input 1
none, Thermocouple, RTD (100Ω,
1kΩ), Thermistor 5kΩ, 10kΩ, 20kΩ,
40kΩ) Process (V, mV, mA) or 1k
Potentiometer
Output 1
none, switched dc/open collector, 5A
mechanical relay (form C), process
(V, mA), or 0.5A SSR (form A)
Output 2
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
PID
Controller
(Optional -
Ramp/Soak max 4
files, 40 steps)
Slots A
(Optional)
Input Sensor
off, heat, cool
alarm, retransmit,
duplex, event
off, heat, cool
alarm, event
off, heat, cool
alarm, retransmit,
duplex, event
off, heat, cool
alarm, event
off, heat, cool
alarm, event
Modbus
Address 1 - 247
Standard Bus
Zone Address
1 - 16
Supervisory &
Power Board
Slot C
EIA-485 Communication
Standard Bus
(optional Modbus RTU)
RUI, EZ-ZONE
Controllers, PLC, PC
or HMI
Output 3
none, switched dc/open collector, 5A
mechanical relay (form C), process
(V, mA), or 0.5A SSR (form A)
Output 4
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
Analog Input 2
none, CT, Thermocouple, RTD (100
Ω, 1kΩ), Thermistor 5kΩ, 10kΩ,
20kΩ, 40kΩ) Process (V, mV, mA)
or 1k Potentiometer
Input Sensor
6
Remote Set Point Operation
• Supports efficient set point manipulation from a remote device, such as a master control
or PLC.

Watlow EZ-ZONE®PMI Controller •14 •Chapter 1 Overview
EZ-ZONE®PM Integrated Model 1/16 DIN With Limit, System Diagram
Without Communications Card (Slot B)
Note:
Number of inputs and outputs and various combinations of the same will vary
depending upon part number; see ordering matrix for more detail.
EZ Key
Programmable Event
Digital Output (or Input) 5 & 6
(optional) none, switched dc
Digital Input (or Output) 5 & 6
(optional) none, switch, volts dc
Limit Controller
Board
(optional)
Slot B
Inputs Outputs
- None
- Limit reset
- Idle set point
- Tune
- Alarm clear, request
- Force alarm
- Silence alarm
- Manual/auto mode
- Control outputs off
- Remote set point
enable
- Lock keypad
- TRU-TUNE+®disable
- Loop & alarms off
- Profile disable
- Profile hold/resume
- Profile start
- Profile start/stop
- Restore user settings
- Event inputs
Output Status
5
1
3
2
4
Indicates Zone
Address
Indicates I/O
Status
Zone
Address
Analog Input 1
none, Thermocouple, RTD (100Ω,
1kΩ), Thermistor 5kΩ, 10kΩ, 20kΩ,
40kΩ) Process (V, mV, mA) or 1k
Potentiometer
Output 1
none, switched dc/open collector, 5A
mechanical relay (form C), process
(V, mA), or 0.5A SSR (form A)
Output 2
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
PID
Controller
(Optional -
Ramp/Soak max 4
files, 40 steps)
Slots A
(Optional)
Input Sensor
off, heat, cool
alarm, retransmit,
duplex, event
off, heat, cool
alarm, event
off, heat, cool
alarm, retransmit,
duplex or event
Limit
off, heat, cool
alarm, event
Modbus
Address 1 - 247
Standard Bus
Zone Address
1 - 16
Supervisory &
Power Board
Slot C
EIA-485 Communication
Standard Bus
(optional Modbus RTU)
RUI, EZ-ZONE
Controllers, PLC, PC
or HMI
Output 3
none, switched dc/open collector, 5A
mechanical relay (form C), process
(V, mA), or 0.5A SSR (form A)
Output 4
5A mechanical relay (form A)
Analog Input 2
none, CT, Thermocouple, RTD (100
Ω, 1kΩ), Thermistor 5kΩ, 10kΩ,
20kΩ, 40kΩ) Process (V, mV, mA)
or 1k Potentiometer
Input Sensor
If Limit, this output must
be Limit
6
Integrated PID and Limit Controller
• Reduces wiring time and termination complexity compared to connecting separate prod-
ucts
• Reduces panel space
• Reduces installation costs
• Increases dependability with backup control sensor operation
• Increases user and equipment safety for over-under temperature conditions

Watlow EZ-ZONE®PMI Controller •15 •Chapter 1 Overview
EZ-ZONE®PM Integrated Model 1/16 DIN System Diagram
with Expanded Communications (Slot B)
Note:
Number of inputs and outputs and various combinations of the same will vary
depending upon part number; see ordering matrix for more detail.
EZ Key
Programmable Event
Digital Output (or Input) 5 & 6
(optional) none, switched dc
Digital Input (or Output) 5 & 6
(optional) none, switch, volts dc
Inputs Outputs
- None
- Idle set point
- Tune
- Alarm clear, request
- Force alarm
- Silence alarm
- Manual/auto mode
- Control outputs off
- Remote set point
enable
- Lock keypad
- TRU-TUNE+
®
disable
- Loop & alarms off
- Profile disable
- Profile hold/resume
- Profile start
- Profile start/stop
- Restore user settings
- Event inputs
Output Status
5
1
3
2
4
Indicates Zone
Address
Indicates I/O
Status
Zone
Address
Analog Input 1
none, CT, Thermocouple, RTD (100
Ω, 1kΩ), Thermistor 5kΩ, 10kΩ,
20kΩ, 40kΩ) Process (V, mV, mA)
or 1k Potentiometer
Output 1
none, switched dc/open collector, 5A
mechanical relay (form C), process
(V, mA), or 0.5A SSR (form A)
Output 2
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
PID
Controller
(Optional -
Ramp/Soak max 4
files, 40 steps)
Slot A
(Optional)
Input Sensor
off, heat, cool
alarm, retransmit,
duplex, event
off, heat, cool
alarm, event
off, heat, cool
alarm, event
EIA-485 Communication
Standard Bus
(optional Modbus RTU)
RUI, EZ-ZONE
Controllers, PLC, PC
or HMI
Communications
EIA 232/485 Modbus RTU/TCP,
EtherNet/IP, DeviceNet, Profibus,
J1939 CAN bus
Modbus Address
1 - 247
Standard Bus
Zone Address
1 - 16
Supervisory &
Power Board
Slot C
Communications
Board
Slot B
6
Serial Communication Capabilities
• Supports network connectivity to a PC or PLC
• Available in a wide range of protocol choices, including Modbus RTU, EtherNet/IP™, Modbus
TCP

Watlow EZ-ZONE®PMI Controller •16 •Chapter 1 Overview
EZ-ZONE®PM Integrated Model 1/8 and 1/4 DIN System Diagram
Without 6 Digital I/O (slot D), Without Communications (slot E)
EZ-ZONE PM Integrated 8th DIN System Diagram
Without 6-digital I/O (slot D), Without Comms Card (slot E)
Inputs
Outputs
If limit, this output
must be limit
Output 4
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
Output 1
none, switched dc/open collector,
5A mechanical relay (form C),
process, or 0.5A SSR (form A)
Analog Input 1
none, Thermocouple, RTD (100Ω,
1kΩ), Thermistor 5kΩ, 10kΩ, 20kΩ,
40kΩ) Process (V, mV, mA) or 1k
Potentiometer
PID
Controller
(Optional -
Ramp/Soak max 4
files, 40 steps)
Slots A
(Optional)
100 to 240Vac
20 to 28 Vac or 12 to 40Vdc
Modbus
Address 1 - 247
Standard Bus
Zone Address
1 - 16
Supervisory &
Power Board
Slot C
Input Sensor
EIA-485 Communication
Standard Bus
(optional Modbus RTU)
RUI, EZ-ZONE
Controllers, PLC, PC
or HMI
off, heat, cool,
retransmit, alarm,
duplex or event
off, heat, cool,
alarm, event or
limit
Output Status
LEDs
5
6
1
3
2
4
Zone
Address
LEDs
Channel
Indicates Zone
Address & Channel
Indicates I/O
Status
off, heat, cool,
alarm, or event
8
7
PID Controller,
Limit, or Current
Transformer Sense
(CT)
Slots B
(Optional)
Analog Input 2
none, CT, Thermocouple, RTD (100
Ω, 1kΩ), Thermistor 5kΩ, 10kΩ,
20kΩ, 40kΩ) Process (V, mV, mA)
or 1k Potentiometer
Input Sensor
Output 2
none, 15A NO-ARC, switched dc,
5A mechanical relay (form A), or
0.5A SSR (form A)
Output 3
none, switched dc/open collector,
5A mechanical relay (form C),
process, or 0.5A SSR (form A)
off, heat, cool,
retransmit, alarm,
duplex or event
off, heat, cool,
alarm or event
Power Supply
Note:
Number of inputs and outputs and various combinations of the same will vary
depending upon part number; see ordering matrix for more detail.
Digital Input (or Output) 5 & 6 (optional)
Programmable Functions
EZ Key 1 & 2
Programmable Functions
Digital Output (or Input) 5 & 6
(optional) none, switched dc
- None
- Limit reset
- Idle set point
- Tune
- Alarm clear, request
- Silence alarm
- Manual/auto mode
- Control mode
- Remote set point
enable
- Lock keypad
- Force alarm
- TRU-TUNE+®disable
- Loop & alarms off
- Profile disable
- Profile hold/resume
- Profile start
- Profile start/stop
- Restore user settings
- Event inputs
- Math