Watlow Series L Temperature Limit - Manual (Page 16)

Wa t l ow S e r i e s L • 14 • A p p e n d i x
Power
• 24V
Å (ac) +10%; -15%; 50/60 Hz, ±5%
• 120V Å (ac) +10%; -15%; 50/60 Hz, ±5%
• 208 to 240V Å (ac) +/-10%, Series LF and CF only
• 230 to 240V Å (ac) +10%; -15%; 50/60 Hz, ±5%
• 10VA maximum power consumption.
• Data retention upon power failure via nonvolatile
memory.
Operating Environment
• 0 to 70°C (32 to 158°F)
• 0 to 90% RH, non-condensing.
• Storage temperature: -40 to 85°C (-40 to 185°F)
Dimensions
• DIN Rail model can be DIN rail or chassis mount
DIN rail spec, DIN 50022, 35 mm x 7.5 mm (1.38
in x 0.30 in)
Style Width Height Depth
Open board 61.7 mm
(2.43 in)
61.7 mm
(2.43 in)
45.1 mm
(1.78 in)
Potted 70.1 mm
(2.76 in)
102.9 mm
(4.05 in)
46.6 mm
(1.84 in)
DIN Rail 78.1 mm
(3.08 in)
112.3 mm
(4.42 in)
90.7 mm*
(3.57 in)
Square
1/8DIN
Panel
72.4 mm
(2.85 in)
72.4 mm
(2.85 in)
Behind panel
51.7 mm
(2.04 in)
*Depth including DIN rail, 94.7 mm (3.73 in)
Note: These specifications are subject to change without
prior notice.
Glossary
automatic power reset — A feature in latching limit
controllers that does not recognize power outage as a
limit condition. When power is restored, the output is
re-energized automatically, as long as the temperature
is within limits.
latched output — Limit control output latches in de-
energized condition when over or under temperature
condition occurs and cannot be reset unless tempera-
ture drops below set point.
limit or limit controller — A highly reliable, discrete
safety device (redundant to the primary controller) that
monitors and limits the temperature of the process or a
point in the process. When temperature exceeds or falls
below the limit set point, the limit controller interrupts
power through the load circuit. A limit controller can
protect equipment and people when it is correctly in-
stalled with its own power supply, power lines, switch
and sensor.
manual power reset — A feature in latching limit
controllers that does recognize power outage as a limit
condition. When power is restored, the output is not re-
energized automatically, even if the process is within
limits. An operator must use the reset key or switch to
manually re-energize the output on power up.
manual reset — A feature on a limit controller that
requires human intervention to return the limit to nor-
mal operation after a limit condition has occurred.
safety limit — An automatic limit intended for use
in applications where an over-temperature fault may
cause a fire.