WATLOW DIN-A-MITE Style C User's Manual
3
Additional Specifications: Phase Angle; Phase Angle Current Limit; & Single Cycle VTB
Operation
• Burst firing (zero-cross) control, single-cycle variable
time base, Type S single-phase and 3-phase. Unit is
not on for more than one full cycle under 50% power
and not off for more than one full cycle above 50%
power.
• Phase angle control, single-phase only
Input Command Signal
• 0 to 20mA, 4 to 20mA, 12 to 20mA,
Î
(dc), 0 to 5V
Î
, 1
to 5V
Î
, and 0 to 10V
Î
• Input impedance 250
Ω
for 4 to 20mA, 5k
Ω
for linear
voltage input
Output Voltage
• 100 to 120V
Å
(ac), 200 to 208V
Å
, 230 to 240V
Å
,
277V
Å
, 400V
Å
, 480V
Å
, 600V
Å
, -15%/+10%, 50 or
60 Hz indep/-5% (Input Control Signal Type
L, P and S)
Phase Angle Accuracy
• Output on time is directly proportional to the command
signal. Output on time is accurate to within 5% of the
command signal input at 25 degrees C ambient. See
chart below for command signal input to output power
transfer function. Temperature stability at ambient
temperature is less than 0.25%/degrees C.
Single Cycle VTB Accuracy
• Output power is directly proportional to the command
signal. Output power is accurate to within 5% of the
command signal input at 25 degrees C ambient.
Temperature stability is less than 0.25%/degrees C
ambient temperature change.
Soft Start
(Phase Angle Input Control Signal Type P and L)
Typically:
• 5 seconds soft start on power up
• Soft start on thermostat overtemperature
• Soft start on 1/2 cycle drop out detection
• 1 second soft switching on set point change
Options
• Manual Control Kit (1k
Ω, 1 turn
potentiometer with dial
scale labeled 0 to 100%) 08-5362
• Alarm option is
not
available on phase angle type P or
type L.
Resolution
• Better than 0.1% of input span with respect to output
change.
Control Mode, Zero-Cross
• Input Control Signal Type C: V
Î
(dc) input contactor.
To increase service life, the cycle time should be less
than 3 seconds.
• Input Control Signal Type K: V
Å
(ac) input contactor.
To increase service life, the cycle time should be less
than 3 seconds.
• Input Control Signal Type F: 4 to 20mA
Î
(dc)
proportional variable time base control.
Input Command Signal
• AC contactor
24V
Å
±10%, 120V
Å
+10%/-25%, 240V
Å
(ac)
+10%/-25% @ 25mA maximum per controlled leg
• Do not use the DIN-A-MITE Vac-input models with a
temperature controller that includes an RC snubber
circuit across its output. Remove the RC snubber
circuit before placing the DIN-A-MITE into service.
• DC Contactor
4.5 to 32V
Î
(dc): maximum current @ 4.5V
Î
(dc) is 6mA per leg. Add 2mA per LED used to the
total current.
• Loop powered linear current
4 to 20mA
Î
(dc): loop-powered. Input Type
F0 option only. (Requires current source with 8.0V
Î
(dc) available. No more than two inputs connected in
series.)
Linearity (Input Control Signal Type F)
• Full on point 19.5 to 19.9mA
Î
(dc), maximum voltage
of 6.2V peak.
• ±5% input to output power accuracy, 0% to 100% of
span (4.3 to 19.7mA or 12.3 to 19.7mA).
• Temperature stability is less than 0.15%/°C change.
Additional Specifications for Contactors and Proportional Controls
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0
10
20
30
40
50
60
70
80
90
100
Command Signal Input (%P)
Output (%P)
Phase Angle Command Signal Input to Output Power
Note:
The DIN-A-MITE C was changed in April of
2007 to add the shut down circuitry (fan failure) to
all units shipped. The shut down temperature is
approximately 117C.
www.
.com
1.800.561.8187
