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Timers
Star Delta Timer
Type DAC51
• Time range (Star): 0.1 to 600 s
• Time range (Star to Delta): 50 to 130 ms
• Knob selection of star time range
• Knob adjustable time setting
• Automatic start
• Repeatability: ≤≤0.2%
• Output: 5 A SPDT relay with neutral centre position
• For mounting on DIN-rail in accordance with DIN/EN
50 022
• 17.5 mm Din-rail housing (DIN 43880)
• LED indication for relay status and power supply ON
Product Description
Star-delta control relay with
two adjustable time ranges:
Star function (0.1 to 600 s)
and star to delta function
(50 to 130 ms).
Housing 17.5 mm wide suitable for DIN-rail mounting.
Fits in M36 cover.
Type Selection
Mounting Output Housing Supply: 24 to 240 VAC/DC
For DIN-rail SPDT relay Mini-D DAC 51 C M24
with neutral
centre position
Time Specifications Output Specifications
Time ranges (star)
Knob selectable 0.1 to 1 s
1 to 10 s
6 to 60 s
60 to 600s
Star to delta delay 50 to 130 ms
Neutral centre position between star and delta
position
Setting accuracy ≤ 5%
Repeatability ≤ 0.2%
Time variation
Within rated power supply ≤ 0.05%
Within ambient temperature ≤ 0.2%
Reset
Time and relay Power supply interruption
≥ 200 ms
Output SPDT relay with neutral
centre position
Rated insulation voltage 250 VAC (RMS)
Contact Ratings (AgSnO
2
)µ
Resistive loads AC 1 5 A @ 250 VAC
DC 12 5 A @ 24 VDC
Small inductive loads AC 15 2.5 A @ 250 VAC
DC 13 2.5 A @ 24 VDC
Mechanical life ≥ 30 x 106operations
Electrical life ≥ 10
5
operations
(at 5 A, 250 V, cos ϕ = 1)
Operating frequency < 7200 operations/h
Dielectric strength
Dielectric voltage 2 kVAC (RMS)
Rated impulse withstand
voltage 4 kV (1.2/50µs)
Ordering key
DAC 51 C M24
Housing
Function
Type
Item number
Output
Power Supply
Supply Specifications
Power supply Overvoltage cat. III
Rated operational voltage (IEC 60664, IEC 60038)
through terminals A1 and A2
M24: 24 to 240 VAC/DC
+10% -15%, 45 to 65 Hz
Voltage interruption ≤ 10 ms
Rated operational power
AC Supply 5 VA
DC Supply 1.5 W
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DAC 51
General Specifications
Power ON delay ≤ 100 ms
Power OFF delay ≤ 100 ms
Indication for
Power supply ON LED, green
Output relays ON LED, yellow (flashing when
timing)
Environment (EN 60529)
Degree of protection IP 20
Pollution degree 3 (IEC 60664)
Operating temperature -20 to 60 °C, R.H. < 95%
Storage temperature -30 to 80 °C, R.H. < 95%
Housing dimensions 17.5 x 81 x 67.2 mm
Weight 85 g
Screw terminals
Tightening torque Max 0.5 Nm according to
IEC EN 60947
Approval UL, CSA
CE Marking Ye s
EMC Electromagnetic Compatibility
Immunity According to EN 61000-6-2
Emission According to EN 61000-6-3
Timer Specifications According to EN 61812-1
Mode of Operation
The output relay is normally
in the neutral centre position. When the power supply
is applied, the relay switches to star position (pin 16)
and the star period starts.
At the end of the set time
period, the relay returns to
the neutral centre position
and the set delay between
star and delta position
starts.
At the end of the star to
delta delay (adjustable from
50 to 130 ms), the relay
switches in delta position
(pin 18) and does not
release until the power supply is interrupted for at least
200 ms.
If the power supply is interrupted for more than 200 ms
before the star time period
has expired, the relay does
not operate and the time circuit is set to zero. The relay is
ready for a new time period
Time Setting
Upper knob:
Setting of star time range
Centre knob:
Star time setting on relative
scale: 1 to 10 with respect
to the chosen range.
Lower knob:
Star to delta time setting (50
to 130 ms)
Wiring Diagram
Operation Diagram
≤ 10 ms
ON
OFF
ON
OFF
Dimensions
17.5
81
2
67.2
18.7
45
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