The EZ-ZONE® ST integrated solid state controller from Watlow®

Watlow EZ-ZONE® ST Integrated Control Loop Makes

Solving the Thermal  Requirements of Your System Easy

The EZ-ZONE® ST integrated solid state controller from

Watlow® offers a complete thermal system control solution

in a single package. Features include a PID temperature

controller connected to a high-amperage solid state relay

with the option of adding a properly sized heat sink, an

over- and under-temperature limit, a power shut-down

contactor, digital communications and a remote user

interface in one complete and professionally engineered

product.

Because the system is modular and scalable, a user only pays

for what is needed. Stacking the EZ-ZONE ST integrated

controller into multiple configurations enables flexibility to

standardize the product platform to solve a wide range of

application needs.

This integrated controller also includes 200KA short circuit

current rating (SCCR) tested up to 480VAC to minimize

damage in the event of a short circuit when used with

required fusing.

Features and Benefits

Back panel or DIN-rail mount

• Provides several mounting options

Compact package

• Reduces panel size

Touch-safe package

• Complies to IP2X increasing user safety

±0.1 percent temperature accuracy

• Provides efficient and accurate temperature control

200KA SCCR with proper fusing

• Minimizes damage in the event of a short circuit

Agency approvals: UL®, CSA, CE, RoHS, W.E.E.E.

• Meets applications requiring agency approvals

Three-year warranty

• Ensures Watlow’s reliability and product support

Off-the-shelf designed system solution

• Improves system reliability and termination reduction

• Reduces installation cost

• Eliminates incompatibility headaches often encountered

with using many different components and brands

Features and Benefits (con’t)

Profile capability

• Includes ramp and soak with four files and 40 total steps

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

Solid state relay output

• Allows faster cycling, more precise control, increased heater

life and energy efficiency

• Ability to handle up to 75 amperes

• Uses either zero-cross or phase angle control modes for

flexibility to control resistive loads such as nichrome,

tungsten or quartz lamps

• Utilizes phase angle control mode to prevent load failure or

blowing fuses for tungsten or quartz loads

PID temperature control

• Allows single input/dual output

• Allows standard PID or adaptive TRU-TUNE®+ tuning

algorithms for demanding controllability requirements

Optional temperature limit

• Increases safety in over- and under-temperature condition

Optional definite purpose mechanical contactor

• Enables circuit safety shut down driven by limit control or

PID alarm output signal

Optional current monitoring feature

• Detects heater current flow and alarm indication of failed

solid state relay (SSR) or heater zone

Optional SSR heat sink

• Sized and engineered for specific applications

• Factory supplied heat sink is UL® listed

System diagnostics

• Provides continuous self-monitoring alerts when there is

any system trouble to reduce maintenance and service costs

PC Software—EZ-ZONE Configurator

• Wizard style configuration of controller settings

• On-line or off-line recipe editing

Specifications

Line Voltage/Power

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

• 24VAC/VDC, +10/-15%; 50/60Hz, ±5%

• 12VA max. power consumption without mechanical contactor

in system

• 50VA max. power consumption with mechanical contactor

used in system, 140VA if using external contactor

• Data retention upon power failure via nonvolatile memory

Environment

• 0 to 158°F (-18 to 70°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

• Types R, S, B: 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

• UL®, CSA, CE (zero cross models only), RoHS, W.E.E.E.

• Limit version features FM approval

Controller

• Microprocessor based user-selectable control modes

• PID module: single universal input, 2 outputs

• Limit module: single universal input, 2 outputs

• Two total additional digital input/outputs shared between PID

and limit functions

• Control sampling rates: input = 10Hz, outputs = 10Hz

• Isolated EIA 485 Modbus® RTU serial communications

Wiring Termination—Touch Safe Terminals

• Input, power and controller output terminals touch safe

removable 12 to 22 AWG

• Power load terminals 6 to 12 AWG

• Tightening torque: 30 in.-lbs

Universal Input

• Thermocouple, grounded or ungrounded sensors

• >20M input impedance

• Max. of 20 source resistance

• RTD 2- or 3-wire, platinum, 100 and 1000 @ 0°C calibration to

DIN curve (0.00385//°C)

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

scalable, 0-50mV

• Inverse scaling

Digital Input

• Update rate: 1Hz

• Dry contact or dc voltage

DC voltage

• Max. input: 36V at 3mA

• Min. high state: 3V at 0.25mA

• Max. low state: 2V

Dry contact

• Max. short circuit: 13mA

• Min. open resistance: 500

• Max. closed resistance: 100