Watlow Series 94 User manual

SERIES 94
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 1⁄16 DIN temperature controller with 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
± 0.1 percent of span,
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.
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
WIN-94-109
Your Authorized Watlow Distributor is:
Registered Company
Winona, Minnesota USA
ISO 9001
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
±0.1
percent accuracy
•Offers excellent range accuracy
© 1999 Watlow Electric Manufacturing Company Printed in the USA on Recycled Paper, 15% Postconsumer Waste
WIN-94-109 11/1/99 11:47 AM Page 1

Ordering Information9 4 - 1 - 0 0
Series 94
Microprocessor-based
1
⁄ 16 DIN, single input, dual output
4-digit displays
NEMA 4X (IP65)bOption
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 suppressionac
Output 2 (Alarm)
A = None
C=
Switched dc output, non-isolated
D = Electromechanical relay, Form C, 5A,
without contact suppressionac
K = Solid state relay, Form A, 0.5A, without
contact suppressionc
Line Voltage/Power
0=
100-240V~ (high voltage)
1= 12-24Vı(ac/dc) (low voltage)
Display
Upper/Lower
RR = Red/Red
RG = Red/Green
GR = Green/Red
GG= Green/Green
aElectromechanical relays are not recommended for PID
control.They are warranted only for 100,000 contact closures.
bTo 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).
cSwitching inductive loads (relay coils, etc.) requires using an
RC suppressor.
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 relayc, Form C, 5A @ 120/240V~
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 500Ωload,
maximum on voltage not greater than 12VÎ(dc) into an
infinite load.
• Solid state relayc, Form A, 0.5A @ 24V~ min. to
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
Line Voltage/Power
• 100-240V~ (85-264V~); 50/60Hz ±5%
• 12-24Vı(ac/dc) (10-26ı[ac/dc]); 50/60Hz ±5%
• Power consumption 7VA (12 to 24 Vı[ac/dc])
12VA (100-240 V~)
• Data retention upon power failure via non-volatile memory
Operating Environment
• 32 to 149°F/0 to 65°C at 115
V~ line voltage power
• 32 to 140° F/0 to 60 ° C at 230V~ line voltage power
• 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
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For other product information, call Watlow’s FAX REPLY: United States [phone] • Outside the United States [phone]
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