Manual

2 WATLOW Series 365 User’s Manual
Description
Specifications
The Series 365 is a 1/16 DIN factory-selectable ana-
log latching limit, ON/OFF or PI control. The control
operates from a thermocouple or RTD input and is
available in several thermocouple ranges including
Types J, K, T, R, S or Platinel II thermocouple.
The 365 has an integral setpot with a front panel
reset switch, and a front panel LED indicator for
output status. In addition to the internal reset
switch, a customer supplied remote reset switch
can be used with the limit control only.
Factory-selectable options include ON/OFF, PI or
latching limit control modes, and auto or manual
reset on power loss. In ON/OFF or PI mode, heat
or cool operation is user-selectable.
The compact size of the controller allows more flexibility
in applications where space is a problem, such as
bench top equipment. The 365 is tested to meet NEMA
4X standards for water and corrosion resistance.
Control Mode
• Heat or cool, user selectable
• ON/OFF
• Switching hysteresis: Typically 3°F/1.7°C
•PI(Time proportional with automatic reset)
• Proportional band adjust: Typically
5 to 50°F/2.8 to 27.8°C
• Cycle time, fixed: Typically 6 seconds
• Automatic reset, fixed: Typically
0.25 repeats/minute
• Limit
• Latching
• High or low, factory selectable
• Internal reset switch and/or customer supplied
remote reset switch. Automatic or manual reset
on power loss (factory selectable).
Operator Interface
• Sealed membrane front panel, NEMA 4X
• LED indication of limit condition or status of load
• Integral Setpot
• Dial scale calibrated to compensate for sensor
non-linearities
• Dual °F & °C scales
Input
• Thermocouple or RTD available
• Thermocouple may be grounded or ungrounded
• Thermocouple, automatic cold junction
compensation
• RTD input 2 or 3 wire, platinum 100Ω @ 0°C cali-
brated for #3850 (DIN): 0.003850Ω/Ω°C or #3916
(JIS) 0.003916Ω/Ω°C curve.
• Thermocouple and RTD sensor break protection
de-energizes output to protect system.
Output
• Solid state relay with contact suppression, Form
A, 0.5A @ 24VAC min., 264VAC max., opto iso-
lated zero-cross switching. Minimum offstate
impedance is 20KΩ. Only available with ON/OFF
or PI control.
• Open collector, switched DC signal provides a
minimum turn ON voltage of 3VDC into a mini-
mum 500Ω load; maximum ON voltage not
greater than 32VDC into an infinite load. Only
available with ON/OFF or PI control.
• Electromechanical relay, Form C, 5A @
120/240VAC. Minimum offstate impedance is
20KΩ. Warranted to 100,000 cycles.
• Electromechanical relay, Form C, 10A @
120/240VAC. Minimum offstate impedance is
20KΩ. Warranted to 100,000 cycles.
• Solid state relay without contact suppression,
Form A, 0.5A @ 24VAC min., 264VAC max., opto
isolated zero-cross switching. Minimum offstate
impedance is 31MΩ. Only available with ON/OFF
or PI control.
Power
• Factory selectable
• 100VAC, ±10%; 50/60 Hz, ±5%
• 120VAC, -15%, +10%; 50/60 Hz, ±5%
• 208VAC, -15%, +10%; 50/60Hz, ±5%
• 240VAC, -15%, +10%; 50/60 Hz, ±5%
• 4VA power consumption
Agency Approvals
• UL, CSA and FM pending
• NEMA 4X rating, pending
Terminals
• #6 compression universal head screw terminals,
accepts 20-14 gauge wire
Accuracy
• Calibration accuracy & sensor conformity: ± 1%
of span maximum, at 77°F ± 5°F (25°C ± 3°C)
ambient and rated line voltage.
• Accuracy span: 1000°F/540°C minimum
• Set point accuracy: ± 3% of span maximum
• Temperature stability: Typically ± 5µV / °F ambi-
ent for thermocouple. Typically < 1°F from 32 to
130°F for RTD.
• Voltage stability: ± 0.01% of span /% of rated line
voltage.
Operating Environment
• 32 to 130°F (0 to 55°C)
• 0 to 90% RH, non-condensing
• Storage temperature: -40° to 158°F (-40° to 70°C)