Grasslin FM/1 digi 42 Operating Instructions Manual
The FM/1 digi 42 is a compact electronic 24 hour/7 day time
switch module, with heavy duty relay contacts for switching low or
line voltage loads. Applicable for time of day control of pumps, fans,
heaters, HVAC control circuits, lighting, machinery and many other
types of commercial, industrial, and agricultural equipment. All digi
42 models offer holiday programming.
All models feature large keys with unique “circular programming”
for easy programming, a large LCD display and battery backup.
TECHNICAL DATA:
Channels: 1
Programs: 42
Holiday program: Yes
Daylight time changeover: Automatic
Manual 3 way override: On-Auto-Off
Shortest switching time: 1 minute
Reserve carryover: 7 days
6 month reserve carryover: Optional
Input voltage models available: 12VDC
24VAC/DC
120VAC
208/240VAC
Switching output: SPDT relay
Switch ratings: 16A res. @ 277VAC
1000W Tungsten @ 250VAC
500W @ 125VAC
Input draw: 4VA
Input frequency: 50 or 60Hz
Wiring connections: 1/4” quick connects
Ambient temperature: –20°F to 140°F (–28°C to 60°C)
UL and Canadian UL recognized: File E83486
INSTALLATION & WIRING:
Note: Although the FM models contain some degree of spike and electrical
noise protection, as with all electronic devices, these units can be affected by
electrical noise. Therefore, it is recommended that they be powered from a
voltage source that has no switching devices or inductive loads connected.
1. Check the input and output ratings marked on the unit to make sure this
product is suitable for your supply voltage, load, and application.
2. Disconnect supply power prior to installation to prevent electrical shock.
3. Wire in accordance with National and Local electrical code requirements.
MOUNTING OPTIONS:
The standard FM/1 models may be surface mounted inside a panel or flush
mounted with FM-F mounting kit, available from Grasslin. Indoor NEMA 1
(E110 or E150), and outdoor NEMA 3R (E200) enclosures are available for
stand-alone mounting.
A mounting base (MB-FMPC) is available for printed circuit board mounting. A clear plastic dust cover (DC-FME) is also available.
Models are also available with screw terminals and DIN rail mounting, or
for flush mounting with housing and clear cover. (Digi 42A & 42E)
FM/1 digi 42
One Channel Electronic Time Switch
Dimensions
Terminal Connections
FM/1 digi 42
TIME
SWITCH
M
1 2 3 4 5
POWER
COM NO NC
TIMER INTERNAL WIRING
FIELD WIRING
LOAD
■ KEYPAD DESCRIPTION
Setting the Time/Automatic Run Mode
Prog. Program Mode
Res.* Reset: Clears all programs and time
Select ON or OFF in Prog. Mode, Manual Override Run Mode
±1h* Manual Daylight Change Key
h Setting the Hour (12:– – AM)
m Setting the Minute (12:01 AM)
Day Set Day and Select Days to be Omitted
Sel. Omit Day Selected w/Day key
Holiday Key
*Recessed keys; use a pen point to press
■ LCD DISPLAY ELEMENTS
■ PROGRAMS
The Digi 42 will accept up to 42 programs
A program consists of:
1. An ON or OFF command
2. Time of day (Hour and Minute)
3. Single day or multiple days
A program is required for each ON event, and a program is
required for each OFF event.
NOTE: MULTIPLE ON OR OFF EVENTS MAY BE PROGRAMMED.
For example, Program 1 may turn the office air conditioning ON at 8AM
Mon.-Fri. Program 2 may turn the air conditioning OFF at 5PM Mon.-Fri.
If someone is working late, they may press the override key to turn on
the air conditioning. If they forget to press the override key again when
they leave, the air conditioning will stay on all night (or all weekend).
To prevent this from occurring, additional OFF times may be pro-
grammed.
• Program 3 can turn the air conditioning OFF at 6PM.
• Program 4 can turn the air conditioning OFF at 7PM.
• Program 5 can turn the air conditioning OFF at 8PM., etc.
!
IMPORTANT: BEFORE PROCEEDING WITH SETTING THE
TIME AND PROGRAMMING THE UNIT, PRESS THE RESET
KEY TO CLEAR ALL DATA FROM THE MEMORY.
■ SELECTING AM/PM OR MILITARY TIME
After pressing reset, the display may show AM (right). The numbered day symbols will be flashing on and off.
If the display does not show AM, it is
in military time mode (24:00 hr.) To
change to AM/PM mode, press and hold
the h key and press the ±1h key once.
AM will appear in display.
If display is in AM mode and military
mode is desired, press and hold the h
key, press the ±1h key once.
■ SETTING THE TIME
NOTE: If the h and m keys are held down longer than 2 seconds,
the numbers will advance rapidly.
Press and hold the key during the following:
(If Daylight Savings Time is in effect, press
±1h
first)
1. Press h to advance to the current hour
(while holding down the key)
2. Press m to advance to the current minute
(while holding down the key)
3. Press Day repeatedly to advance to current day (while holding
down the key)
NOTE: If the days are flashing, it indicates the day of the week was
not set when setting the time. The timer cannot be programmed unless
the day of the week is entered.
■ MANUAL DAYLIGHT TIME CHANGEOVER
Each year, in the Spring, press ±1h to advance the time an hour. In
the Fall, press ±1h to set back an hour.
■ SETTING AUTOMATIC DAYLIGHT TIME
CHANGEOVER (OPTIONAL)
NOTE: It is only necessary to program the changeover dates once.
The timer will then automatically change the time at 2:00AM on the first
Sunday in April and the last Sunday in October until the year 2079.
1. Press and hold the ±1h key
and press the Day key once. If
in AM/PM mode, “12:31” (Dec.
31) will be flashing. If in military
time mode, “31:12” will be
flashing.
2. Enter the current (today’s) date.
Example: June 15, 1997.
Press m key (for date) to 15
first and then press h key (for month) to 06 (If in military time, h
is date and m is month)
3. Press ±1h once, a 2 under Tu and 1995 appears in display
4. Enter the current year. Example: 1997. Press m key twice to
1997 (If you overshoot, hold down the m key – the years will
scroll to 2079 and back to 1995)
5. Press ±1h once, a 3 under We and AU appears in display,
which indicates preset European dates.
6. Press m key once so display shows cHA (If m key is inadvertently pressed twice and HA shows in display, press m key two
more times until cHA shows)
7. Press ±1h once, a 4 under Fr and 03:30 (for 1997) appears in
display, which indicates March 30 (30:03 in military)
8. Enter the date for spring time change. Example: April 6, 1997.
Press h key (for month) to 04. Press m key (for date) to 06 (If
in military time, h is date and m is month)
9. Press ±1h once, a 5 under Sa and the fall time change date
appears in display. Example: 10:26 for 1997
10. Press key to enter Run Mode
Daylight Time Changeover Dates
1997 April 6 - October 26 2002 April 7 - October 27
1998 April 5 - October 25 2003 April 6 - October 26
1999 April 4 - October 31 2004 April 4 - October 31
2000 April 2 - October 29 2005 April 3 - October 30
2001 April 1 - October 28 2006 April 2 - October 29
Days of the Week ➠
Daylight Time Symbol ➠
AM and PM Symbol ➠
Channel Indication ➠
➠
➠
➠
➠
➠
Holiday Indicator
Time of Day or
Switching Time
Manual Override ON
ON/OFF Symbol
OFF Symbol
ON Symbol
Continuous OFF Symbol
Continuous ON Symbol
Run Mode Symbol
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