Grasslin Digi 322 Operating Instructions Manual
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Digi 322
365-Day One, Two and Four Circuit
Electronic Time Switch by Grasslin
Operating Instructions
TECHNICAL DATA
Input Voltage: Separate models available for
24V, 120V or 240VAC, 50-60 Hz input
Relay Switch Rating: 16A @ 24/250 VAC
Output Relay: SPDT dry contacts for each channel
Power Consumption 5 VA
Battery Backup: 150 hours minimum,
rechargeable battery is built in
Temperature Range: 14°F – 131°F (–10°C to 55°C)
Display: AM/PM LCD 7/8" x 1-5/8"
Dimensions: H 3-1/4" x W 4-1/8" x D 2-7/8"
Weight: 18 oz.
Mounting:
Shortest Switching Time: One second
Block Programming: Weekdays
Surface & DIN rail (NEMA 1 indoor &
NEMA 3R outdoor enclosures available)
The Digi 322 controls are one, two and four
channel electronic time switches with 365day, 7-day and 24-hour programming. The
channels are freely programmable with a total
of 322 schedules. The load status, time of day,
and date are displayed on a large LCD readout.
Functional Description
The Digi 322 time control can be programmed as
24-hour, 7-day, or a 365-day schedule of individual holidays or holiday/vacation periods. This
control incorporates a calendar through the year
2090 and also includes automatic leap year
adjustment. The annual daylight savings/standard time changes can be programmed to occur
automatically each year through 2090.
Holidays that occur on the same date each year
(July 4) need only be programmed once—they
will be stored and will be executed each year
until 2090. Holidays that occur on a different date
each year (Labor Day) should be entered with
the 1X key (one-time). They will be automatically
neutralized after their occurrence, therefore, they
need not be deleted when programming the control next year. These features minimize the annual
programming considerably.
Please read these operating instructions carefully
so that you will be able to take full advantage of
the functions offered by the Digi 322 time control.
TO THE INSTALLER:
1. Read operating instructions carefully.
2. Check the input voltage ratings marked on the
unit to make sure this product is suitable for
your power supply and application.
3. Disconnect power supply prior to installation to
prevent electrical shock.
4. Damage to the relay-contacts caused by short
circuiting will void warranty.
5. Wire in accordance with National and Local
electrical code requirements.
2
WIRING
Make certain to connect only to the supply voltage
designated on the unit itself. Warranty will be void if
wrong voltage is applied. Connect wires to the screw
terminals in accordance with the wiring diagram
shown (use 12 to 22 AWG wire).
Install both terminal covers after wiring. Depending on
installation you may want to wire unit before snapping
to rail. For stand-alone installation use a Grasslin
indoor/outdoor enclosure, E100, E150, or E200.
INSTALLATION CHECKLIST
1. The time switch should have its own independent
circuit for power supply.
2. Since all electronic instruments are sensitive to voltage spikes, close attention must be paid to the following:
a) If possible, power to the electronic time switch
should be supplied from a phase different from
the one supplying power to the load.
b) INDUCTIVE-LOADS should have suitable
VARISTOR and RC network ( ) across
the supply terminals to reduce voltage spikes.
c) DC INDUCTIVE LOADS should have a diode
across their terminals to eliminate back EMF of
the inductor.
d) HIGHLY INDUCTIVE LOADS, especially fluores-
cent lights, may require a relay in which case (a)
and (c) apply.
e) IN HIGH LIGHTNING AREAS, a surge suppres-
sor should be installed.
Installation
MOUNTING
Surface mounting the Digi 322 inside a control panel
or enclosure is accomplished with the supplied rail—
the rail is surface mounted with two screws. Mount at
convenient eye level position.
You are now ready to affix the unit to the rail. Place the
two protruding guides, which are on the top of the rear
rail cutout slot, over the top lip of the rail; then snap
the bottom into place.
The timer module can be removed from the timer
housing for programming or change-out purposes.
Please note that the battery needs to be charged
beforehand.
NOTE: After applying power, it may take a few minutes
for the battery to charge and display to appear.
Dimensions
Terminal Connections
Digi 322-45/4Y
*No internal connection. May be used as ground wire tie point.
*No internal connection. May be used as ground wire tie point.
Digi 322-45/2Y
Digi 322-45/1Y
4 5 62 3 7 8 9 10 11 12 13 14 15
NO
*
CH 1 CH 2 CH 3 CH 4
NC NO NC NO NC NO NC
1
M
~
4 5 62 3 7 8 9
NO
*
CH 1 CH 2
NC NO NC
1
M
~
4 5 62 3
NO
*
CH 1
NC
1
M
~
3
KEYPAD DESCRIPTION
Mo – Su – Day selector
Reset* – Clears all programs and actual time
S/W* – Switch for daylight savings time functions
Prior. – Sets priorities
Year – Sets year when setting actual time or DST
CL – To cancel an individual program step
R – Used to review the program
1X – Used to enter a one
time schedule
N – Used to enter an intermediate step in a
program block
– Recalls actual time (Time of Day)
S – Used to store the final step in a program
block
– Sets the momentary contact
– Used to set the end of a multiday
holiday period
Day – Used to set the day of the month
Month – Used to set the month
h+ – Hour advance
h– – Hour reverse
m+ – Minute advance
m– – Minute reverse
I/O – Sets ON (1), OFF (0) command for each
channel
– Manual override for each channel
*Recessed buttons—use a long pen point or pencil
LCD DISPLAY ELEMENTS
The LCD incorporates a number of different elements
to display various data and information.
1. Example: Actual date and time of day
2. Example: Daylight savings time
3. Example: Momentary Contact
4. Example: Other displays
PROGRAM BLOCK FORMATION
The purpose of the blocks is to simplify the programming, i.e. switching
times
that are the same for different holidays or periods need not be repeated.
Likewise, when programming ON and OFF times the
date need only be entered once.
The time switch assigns a block number from 00 to 99
to each program with dates entered. All programs
without a date (7-day programs) automatically receive
the block number 00.
Programs with dates – individual days or periods of
days – are assigned an ascending block number (01,
02...99). All programs within a block are stored by
pressing “N”. The last program or portion of a program within a block is entered by pressing “S”, thus
closing the block.
Execution of Programs
At beginning of each day the microprocessor determines which of the stored programs for that day have
the highest priority. Only the highest priority
program(s) will be executed.
Once the Digi 322 is programmed, it will automatically
“look back” and assume the correct ON or OFF switch
position.
PRIORITY
The microprocessor automatically assigns the lowest
priority – “0” – to standard 7-day programs.
Holiday programs with a duration of more than one
day automatically receive priority “1”.
Holiday programs for one day only automatically
receive priority “2”.
A higher priority can be manually assigned to any holiday program by using the “Prior.” key.
PROGRAM STORAGE CAPACITY
The Digi 322 can store up to 322 programs. These
322 programs can be freely assigned to different
dates or periods, switching times or channels. A storage position is used each time the button “N” or “S” is
pressed. If all 322 storage positions are used up, four
8’s will be shown in the display.
If a program step is not complete and storage is
attempted with the “N” or “S” button, the missing components will blink in the LCD.
SETTING THE TIME
[Example: 8:15 AM, July 10, 1996]
Press “Reset” to clear the time and all programs.
While holding :
Press
“Year” to 96
Press “Month” to 7 (July)
Press “Day” to 10
Press “h+” to 8 (AM)
Press “m+” to 15
Release the
. The current date and time will be displayed, as will the day of the week; the time colon will
blink. Channel settings and override status will be indicated on the right and the +1h indicates that Daylight
Savings Time is in effect, if appropriate.
}
Channel Indicator
in Automatic Mode
(All 4 OFF)
Weekdays
Date
Automatic Mode Symbol
Year
Time of Day
+1 h
Beginning Date
Ending Date
Daylight Savings Symbol
AUTOMATIC
}
Channel Selection 1...4
(Only ON Commands)
Duration (Seconds)
Weekdays
Priority
Block
Momentary Contact Symbol
Switching Time
1x
FIX
FIX
FIX
FIX
}
One Time Symbol
Switching Time
Manual Override
Indicators (OFF)
Temporary and Fixed
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