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CITY CODE CHART*

Setting AM/PM (12 Hour) or 24 Hour Display

  Cat. No. : 

             T2DDT8

T2DDT7

Astro    Mini

ASTRONOMICAL TIME SWITCH

TERMINAL DETAILS : 

CONNECTION DIAGRAM:

OVERALL DIMENSIONS:

Red LED for Relay Status

110 to 240 VAC

6 keys with 1 recessed reset button  

  6 VA

+/- 1 s/day @ 25°C.  
3 Lines Text LCD 

Approx. 6 years running reserve

Annual clock with calendar up to 31.12.2099
00-23

00-59

Either AM/PM (12 h) or 24 h Clock
Programs and clock are reset to default
Auto/manual switching option

50/60 Hz

Based on:
1) Latitude/Longitude precision to the minute, with time zone.
2) Option for both Sunrise/set & Twilight rise/set.
3) DST feature- 1 hour (with indication on the screen).
4) Weekly OFF.
5) Offset facility.
6) OFF Hours

1 C/O (SPDT)
16 A (NO) and 

@ 240 VAC / 24 VDC

5 A (NC) 

1000 W
6 A @ 250 VAC
AgSnO

50 X 10

1 min

Operating Temperature Range

-10°C to + 55°C

Storage Temperature Range

Utilization Category AC-15  Ue Rated Voltage
                                      
                                         

Utilization Category DC-13  Ue Rated Voltage
                                        Ie Rated Current

Base / Din Rail
Flame Retardant UL-94V0
110 g max

IP-20 for Terminals; IP-40 for Enclosure

-10°C to + 60°C

2.0 / 0.22 / 0.1 

24 / 125  / 250 

3.0 / 1.5 

120 / 240 

 Harmonic Current Emissions

Voltage Flicker & Fluctuation

Power Frequency Magnetic Field  
Voltage Dips and Interruption (AC)

Test Voltage between Input and Output

IEC 61000-3-2   Ed. 3.0 (2005-11) Class A
IEC 61000-3-3   Ed. 2.0 (2008-06) Class A

IEC 61000-4-3   Ed. 3.0 (2006-02) Level III

IEC 60947-5-1   Ed. 3.0 (2003-11) 2 kV

CISPR 14-1        Ed. 5.0 (2005-11) Class B 

CISPR 14-1        Ed. 5.0 (2005-11) Class B

IEC 61000-4-11 Ed. 2.0 (2004-03) Class B

IEC 61000-4-8   Ed. 1.1 (2001-03)

IEC 61000-4-6   Ed. 2.2 (2006-05) Level III

IEC 61000-4-5   Ed. 2.0 (2005-11) Level IV

IEC 61000-4-4   Ed. 2.0 (2004-07) Level IV

IEC 61000-4-2   Ed. 1.2 (2001-04) Level II

Impulse Voltage between Input and Output

IEC 60947-5-1   Ed. 3.0 (2003-11) Level IV

IEC 61010-1      Ed. 2.0 (2001-02)
UL 508              Ed. 17  (1999-01) > 2000 

M

UL 508              Ed. 17  (1999-01) < 3.5 mA

IEC 60068-2-1   Ed. 6.0 (2007-03)
IEC 60068-2-2   Ed. 5.0 (2007-07)
IEC 60068-2-6     Ed. 7.0  (2007-12) 5 g
IEC 60068-2-27 Ed. 4.0 (2008-02) 40 g, 6 ms

IEC 60068-2-27 Ed. 4.0 (2008-02) 30 g, 15 ms

2

30,000 cycles @ rated load

Power Consumption (Max.)

Minimum Switching Load

Minimum Switching Time

Supply Characteristics:

Electrical Fast Transients

Conducted Susceptibility

Environmental Testing:

Inductive Load (Cos o = 0.6)

Relay Output Characteristics:

Ie Rated Current

(V)

(A)
(V)
(A)

Maximum Operating Altitude

2000 m

Humidity (Non-Condensing)

95% Rh

2

3

40 mA at 24 VDC

-20% to +10%  of    

(

 

Base / Din Rail Mounting

68.5

45.0

36.0

100.0 C/C

90.0

16

15

18

L

N

MAN

RST

ESC 

OK

Use Copper Conductors Only, 60/75° C.

TLL002_11

RoHS

Programming

Operating Frequency

Battery Backup

 LED Indication

 Day

Supply Variation

Modes

 Hour
 Minute
 Clock Format
 Reset

Contact Arrangement

Incandescent Lamps

Contact Material

Mechanical Life
Electrical Life

Number of keys

Enclosure
Weight (Unpacked)

Degree of Protection

EMI/EMC:

Supply Voltage (   ) 

 ESD

Radiated Susceptibility

Surge

Conducted Emission
Radiated Emission

Single fault
Insulation Resistance

Cold Heat
Dry Heat
Vibration

Repetitive Shock 
Non-repetitive Shock 

Safety:

Leakage Current

Pollution Degree

Others:

/

Contact Rating

Settings:

 

Mounting

LCD Display

Clock Accuracy

DIN RAIL

 35mm

65.0

17.0

0.54 N.m (5 Lb.in)
Terminal screw - M2.5

1 x 0.2....3.3 mm
Solid Wire

1 x 24 to 12 

3.5 mm

AWG

NOTE: 

CAUTION:

FAQ’s (FREQUENTLY ASKED QUESTIONS):

Q.6:

I want to switch OFF the output of Astro for a particular time 

interval  without  affecting  the  main  program.  Which  feature           
should I use?

A.6:

You can use ‘OFF-Hours’ feature to switch OFF the output for 

a particular time period. To set OFF Hour feature,   select‘OTH’ 
menu and then select ‘OFHR’. 

Q.2:

What is Manual switching (override)? When do we use it? 

A.2:

When it is desired to switch ON/OFF the output before the 

actual event i.e. (ON/OFF event), manual override can be used. 
Press the MAN key for 3 s to toggle between ON Auto & Auto 
mode when relay (output) is OFF and to toggle between Auto OFF 
or Auto mode when the output is ON. 

Q.3:

What should I do to reset all settings and Clock?

A.3:

Press the Reset (RST) key. All settings will set to default 

and the clock will be reset to 00:00 & the date will be set to 
01/01/2000.

Q.4:

How should I change clock format from 12 h to 24 h?

A.4:

Press ‘    ’ & ‘MAN’ key to switch from 12 h to 24 h clock 

format and vice versa.

Q.5:

How does ON AUTO and AUTO OFF feature help?

A.5:

ON AUTO / AUTO OFF feature is used to immediately switch 

the output ON / OFF respectively, overriding the current output 
condition. If the output ON time is 6:15 p.m. & we want to switch 
ON the output earlier, at 5:30 p.m. then set the mode as ‘ON 
Auto’. The output will be switched ON immediately. The mode will 
automatically change to ‘Auto’ at 6:15 p.m. which is the next auto 
event. Similarly the output can be switched OFF earlier than the 
output OFF time using the Auto OFF feature.

Q.1:

In the event of power failure, do I lose all settings in the 

device?

A.1:

No, the battery has a power reserve of approx 6 years at 

operating temperature range. In the absence of mains supply, 
we can program the device as per the requirement. However, 
during power failure, the relay or LED will not operate but the 
relay status can be observed 

on the screen.

Q.7:

How can I switch the output ‘ON’ 30 min after sunset?

A.7:

Use the Offset feature to change the ON time or OFF time of 

the  output.  To  set  offset,  select  ‘OUT’  menu  and  then  select 
‘OFSR’ to set offset for rise & ‘OFSS’ to set offset for set. To switch 
ON the output 30 min after sunset, set ‘OFSS’ as ‘POS’ (positive) 
and enter the time as 30 min. 

Q.8:

I'm using Astro for my company's street lights and I want 

these  lights  to  be  switched  OFF  from  Saturday  evening  to 
Monday morning. Which feature  should I use?

A.8:

You can use the Weekly-OFF feature for this purpose. To use 

this  feature,  select  ‘OTH’  menu  and  then  select  ‘WOFF’.  Then 
select  ‘SA’  as  the  start  day.  Enter  the  start  time  in  hours  and 
minutes. Similarly, enter ‘MO’ as the end day and time in hours 
and minutes. If you have selected same day & time for start as 
well as end, then ‘WOFF’ is not applicable.  

1. Always follow instructions stated in this manual.

2. Before installation ensure that the specifications agree with 
    the intended application.

3. Installation should be done by skilled electrician only.

4. Inductive loads should be equipped with interference 
    supressors like varistors, RC snubbers.

5. Use of contactors is recommended if load exceeds the 
    contact rating.

1. If DST is applicable in your region, first set the DST and 
    then set the clock.

2. Due to properties of some lamps, it might take a few  
    minutes for the lamps to illuminate completely even after 
    the output has been switched ON.

3. Product innovation being a continuous process, we reserve 
    the right to alter specifications without prior notice.

Viewing the Output ON & OFF Time for the Day

ON

Ouptut OFF

Time

Output ON

Time

AUTO

ON

OFF

00

:

00

07

:

07

18

:

10

SA

 

 

To view OFF & ON time for the day, press ‘   ’ & ‘   ’ 
respectively. This is possible only when the device is in run 
mode & not in edit mode. 

To change the time format from 12 h to 24 h & vice versa, 
press ‘    ’ & ‘MAN’ keys simultaneously.

To view the city code chart number, press ‘ESC’ key 4 times.

In case the city code chart is lost or misplaced, order the city

code chart by sending an email to:

[email protected]

 or 

[email protected]

 or

download it from: 

www.gicindia.com

  

L

N

18

TS

N

P

NO

NC

15

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LOAD

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