Watlow 94 Data sheet

SERIES 94

Registered Company

Winona, Minnesota USA

ISO 9001

Protection For
Over-temperature
Hazards

The Series 94 is a microprocessor-based control with single
input, dual output.This controller is added to thermal
applications to limit over-temperature conditions.The limit
controller provides safety assurance against instances where a
high temperature runaway condition could occur from a
shorted input sensor or an output device that could fail in a
closed position. A limit controller is recommended for any
application where thermal runaway could affect operator
safety, cause damage to capital equipment, produce large
product scrap costs or create a fire hazard.

Watlow's Series 94 is a
NEMA 4X (IP65) front panel (optional).This high performance
controller is ideal for applications such as furnace and ovens,
environmental chambers, semiconductor, food processing or
anywhere an over-temperature condition could cause damage
to equipment, product, create a fire hazard or pose a risk to
personnel. Since the NEMA 4X front panel can be hosed or
wiped down without damage to the controller it is also
excellent for use where equipment needs to be cleaned
frequently. The compact size of the controller allows more
flexibility in applications where space is a problem.

The Series 94 also has many of the standard Watlow features,
such as dual digital display, accuracy at
a wide operating environment from 0 to 65˚C, at 115V~ line
voltage power/0-60˚C for 230V~ power, easy setup with
operator friendly prompts.

The Series 94 is manufactured by ISO 9001 registered Watlow
Controls and reliably backed by a three-year warranty.

1

⁄16 DIN temperature controller with a

±

0.1 percent of span,

Features and Benefits

Dual display

• Displays limit set point and actual

Dual outputs

• Provides limit/alarm capacity

NEMA 4X (IP65) certified (BSEN) (optional)

• Offers water and dust resistance

Universal inputs

• Offers wide range of sensor inputs

Lock-out facility

• Offers high security

Output limit

• Safety shut down in over-temperature condition

Flexible hi/low alarm output

• Notifies of trouble

Programmable display default

• Shows actual, limit or alarm default display information

percent

±0.1

• Offers excellent range accuracy

accuracy

Your Authorized Watlow Distributor is:

WIN-94-109

Watlow Controls

A subsidiary of Watlow, Designer and Manufacturer of
Industrial Heaters, Sensors and Controls

1241 Bundy Boulevard,
Winona, Minnesota 55987-5580 USA
Phone: [phone]
FAX: [phone]
Internet: www.watlow.com

© 1999 Watlow Electric Manufacturing Company Printed in the USA on Recycled Paper, 15% Postconsumer Waste

Specifications

Control Mode

• Microprocessor-based

• Single input, dual output

• Limit and alarm

Agency Approval

• FM approved, Class 3545, File J.I. 0D5A1.AF

Operator Interface

• Sealed membrane front panel

• Dual, 4-digit red or green displays

• Advance, Increment, Decrement, and Reset keys

Accuracy

•

Calibration accuracy and sensor conformity: ±0.1% of span,
±1

°C

@ 77°F ± 5°F/25°C ± 3°C ambient and rated line

voltage

• Accuracy span:1000°F/540°C minimum

• Temperature stability: ±0.2°F/°F or ±0.1°C/°C rise in
ambient maximum

•

Voltage stability:±0.01% of span per percent of rated line voltage

Sensors/Inputs

• Thermocouple, grounded or ungrounded sensors

• RTD 2- or 3-wire, platinum, 100Ω @ 0°C calibration to DIN
curve (0.00385Ω/Ω/°C) or JIS curve (0.003916Ω/Ω/°C); user
selectable

• Sensor break protection de-energizes limit output to
protect system

• °F or °C display, user selectable

Input Range

Specified temperature ranges represent the controller’s
operational span.

• Thermocouple

Type B 32 to 3308°F or 0 to 1820°C
Type J 32 to 1382°F or 0 to 750°C
Type K -328 to 2282°F or -200 to 1250°C
Type N 32 to 2282°F or 0 to 1250°C
Type S 32 to 2642°F or 0 to 1450°C
Type T -328 to 662°F or -200 to 350°C

• RTD Resolution (DIN or JIS)

1° -328 to 1292°F or -200 to 700˚C

0.1° -199.9 to 999.9°F or -199.9 to 700.0˚C

Output 1 Limit

• Electromechanical relay

Output 2 Alarm

• Electromechanical relay

• Switched dc

• Solid state relay

Output Specifications

• Electromechanical relay
or 30VÎ(dc) maximum, rated resistive load, without contact
suppression.

• Switched dc signal provides a non-isolated minimum turn on
voltage of 3VÎ(dc) into a minimum 500Ω load,
maximum on voltage not greater than 12VÎ(dc) into an
infinite load.

• Solid state relay
265V~ max. Opto-isolated, without contact
suppression. Off state output impedance is 31MΩ.

Output Configurations

Output 1 selections: Limit Control

• Limit output

Output 2 selections:

• Process with flashing alarm message

• Process without alarm message

• Alarm with separate high and low set points

• Hysteresis: 1 to 9999°C/°F

United States Sales Offices: Atlanta/Greenville, [phone] • Austin, [phone] • Charlotte/Columbia, [phone] •

Chicago, [phone] • Cincinnati, [phone] • Cleveland, [phone] • Dallas, [phone] • Denver, [phone] •
Detroit, [phone] • Houston, [phone] • Indianapolis, [phone] • Kansas City, [phone] • Los Ang eles, [phone] •
Maryland/Virginia, [phone] • Minneapolis, [phone] • Nashville, [phone] • New England, [phone] •
New Y ork/New Jersey/Philadelphia, [phone] • New Y ork, Upstate, [phone] • Orlando, [phone] • Phoenix, [phone] •
Pittsburgh, [phone] • Portland, [phone] • St. Louis, [phone] • Sacramento, [phone] • San Diego, [phone] •
San Francisco, [phone] • Seattle, [phone] • Tampa/St.Petersburg, [phone] • Tulsa, [phone] •
Winston Salem/Raleigh, [phone] • Wisconsin, [phone]

Asian Sales Offices: Australia, [phone] • China, [phone] • Japan, [phone] • Korea, [phone] •

Singapore, [phone] • Taiwan, [phone] European Sales Offices: France, [phone] • Germany, [phone] •
Italy, [phone] • United Kingdom, [phone] Latin American Sales Office: Mexico, [phone]

For other product information, call Watlow’s FAX REPLY: United States [phone] • Outside the United States [phone]

c

, Form C, 5A @ 120/240V~

c

, Form A, 0.5A @ 24V~ min. to

Line V oltage/Po wer

• 100-240V~ (85-264V~); 50/60Hz ±5%

• 12-24Vı(ac/dc) (10-26ı[ac/dc]); 50/60Hz ±5%

• Power consumption 7VA (12 to 24
12VA (100-240

• Data retention upon power failure via non-volatile memory

Operating Environment

• 32 to 149°F/0 to 65°C at 115

• 32 to 140°

• 0 to 90% RH, non-condensing

• Storage temperature: -40° to 185°F/-40° to 70°C

Terminals

• Size 6 universal head screw terminals accepts 20-14 gauge wire

Dimensions

Height 2.1" 53 mm
Width 2.1" 53 mm
Overall Depth 4.7" 119 mm
Behind panel depth 4.1" 104 mm
Weight 0.5 lb 0.2 kg

V~)

F/0 to 60°C at 230V~ line voltage power

Vı[ac/dc])

V~ line voltage power

Ordering Information

9 4 - 1 - 0 0

Series 94

Microprocessor-based

1

⁄16DIN, single input, dual output

4-digit displays

NEMA 4X (IP65)b Option

A = Without NEMA 4X (IP65) Rating
B = With NEMA 4X (IP65) Rating

CE Option

A = Non CE Compliant
B = CE Compliant

Output 1 (Limit)

D = Electromechanical relay, Form C, 5A,

without contact suppression

Output 2 (Alarm)

A = None

Switched dc output, non-isolated

C=
D = Electromechanical relay, Form C, 5A,

without contact suppression

K = Solid state relay, Form A, 0.5A, without

contact suppression

Line V oltage/P ower

100-240V~ (high voltage)

0=
1=

12-24Vı(ac/dc)

(low voltage)

Display

Upper/Lower
RR = Red/Red
RG = Red/Green
GR = Green/Red
GG= Green/Green

a Electromechanical relays are not recommended for PID

control.They are warranted only for 100,000 contact closures.

b To effect NEMA 4X (IP65) rating requires a minimum

mounting panel thickness of 0.06 inch (1.5 mm) and surface
finish not rougher than 0.000032 inch (0.000812 mm).

c Switching inductive loads (relay coils, etc.) requires using an

RC suppressor.

ac

ac

c