Watlow Series L Temperature Limit - Manual (Page 3)

Wa t l ow S e r i e s L • 1 • C h a p te r 1 : O ve r v i ew
Watlow's Series L family of temperature limit con-
trollers* provide an economical limit controller solu-
tion for applications where thermal system protection
is needed.
A limit controller is added to applications to pre-
vent over or under temperature conditions. The limit
provides safety assurances against instances where
a thermal runaway condition occurs as a result of a
failed sensor, controller or output device.
The Series L limit controller is recommended for
any application where thermal system runaway could
result in large product scrap costs, damage to system
equipment, potential fire hazard or risk to personnel.
All Series L limit controllers are Factory Mutual and
CSA approved.
These controllers are available with or without an
operator interface and can be ordered in square 1/8th
DIN panel mount, din rail mount, open board or pot-
ted module design configurations. Push-on, quick con-
nect spade terminal or removable screw clamp style
terminal block ordering options provide the electrical
connections.
The microprocessor design platform provides im-
provements in the performance, repeatability, and ac-
curacy offered by Watlow's current line of basic control
products.
The Series LV includes an operator interface to al-
low viewing and selection of the limit set point. A red
four character, seven-segment LED displays the limit
set point. The limit set point selection is made with
a continuous turn, velocity-sensitive rotary encoder.
Push-to-Set operation reduces accidental limit set
point adjustments. Limit set point operating range
temperature values are customer definable in the
product configuration part number.
The Series LF offers fixed limit set points. These
units are supplied without an operator interface. Limit
set point temperature values are customer definable in
the product configuration part number.
The features and performance of these products
make them ideally suited for a wide range of industrial
limit control applications in the food preparation, in-
dustrial machinery, packaging and plastic markets.
Watlow's Series L limit controllers include industry-
leading service, support and a 3-year warranty.
*Also available, Series C, an on-off temperature
controller version.
Features and Benefi ts
Four-Character LED Display
• Improves limit set point adjustment accuracy.
Fixed or Adjustable Limit Set Points
• Tamper proof operation.
• Control flexibility.
Set Point Adjustment Opetions
• Rotary encoder.
• Tactile increment and decrement keys.
Push to Set
• Reduce accidental limit set point adjustments.
Multiple Mounting Options
• Minimizes installation time.
High or Low Limit Operation
• Application flexibility.
Fahrenheit or Celsius Operation with Indication
• Application flexibility.
Sensor Break Protection
• Provides positive system shutdown.
Agency Approvals
• Meets requirements for agency certification.
• NEMA 4X/IP65 seal panel mount versions avail-
able.
• W.E.E.E.; CE; RoHS
Micro Processor Based Technology
• Accurate and repeatable protection.
Stock to Four-Day Delivery
Overview
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