Maple Chase EC74/50S Manuale utente
EC74/50S
365-Day Four Channel Time
Control
I. INTRODUCTION
The EC74/50S is a 365-day, four channel, microprocessor-
based time control. It is ideal for lighting or HVAC control in
which time-of-day scheduling is common. The programmable
momentary feature provides a 1 to 59 second momentary
contact closure for applications such as bell ringing, urinal
flushing, synchronous wall clock correction and operating
mechanical latching relays. The enclosure is made of durable
noncorrosive plastic for years of life.
II. SPECIFICATIONS
Programming Capabilities
• Seven-day programming using 365-day calendar with
eighth day as a holiday program.
• 16 holiday durations programmable by date.
• 50 set points. A set point can be assigned to any day or to
any combination of days. Each of the 4 circuits can be
independently programmed.
• Each set point can be either an ON, OFF or momentary
type event. A programmable momentary duration of 1-59
seconds can be entered for each of the 4 circuits.
• 12-hour (A.M./P.M.) or 24-hour clock format.
• Automatic daylight-saving time changeover with yearly
compensation.
• Keyboard override until next programmed event.
• 3-second stagger up between loads.
• Leap year corrected.
• Keyboard programming.
• LCD display of time-of-day and day of week. Circuit status
indicated by LEDs (if LED is lit, output relay is energized as
a result of a programmed ON or an override).
Electrical
Power Requirements:
Input Power (three voltage models):
24 Vac (+10-15%), 50/60 Hz
100-120 Vac (+10-15%), 50/60 Hz
200-240 Vac (+10-15%), 50/60 Hz
4 SPDT Output Relay Contacts:
VOLTAGE RESISTIVE H.P. PILOT DUTY
24 Vac 10A 1/10 60 VA
120 Vac 7.5A 1/3 345 VA
240 Vac 5A 1/2 360 VA
Wiring: Terminals can accommodate 12 to 24 AWG wire.
Power Outage Carryover
Program and Time-of-Day Back Up-100 hours of carryover
with 9 volt alkaline battery (not provided).
• This control is completely operational during a power out-
age, except for relay operation.
Accuracy
Time-of-day-Maintained time is as accurate as line frequen-
cy.
Resolution-One minute for time-of-day and programmed ON
and OFF events. (One second resolution using momentary
type event.)
Physical
Dimensions: Height 8.5 in. (21.6 cm)
Width 6.3 in. (16 cm)
Depth 3.8 in. (9.6 cm)
Weight: Approximately 1.6 lbs. (.7 kg)
Enclosure: NEMA type 3R plastic case.
Conduit knockouts.
Mounting: Vertical
Environment
Temperature: Operating-32 degrees F (0 degrees C) to
122 degrees F (50 degrees C)
Storage-0 degrees F (-20 degrees C) to 140
degrees F (60 degrees C)
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III. INSTALLATION INSTRUCTIONS
Mount the control in an environment that is free from exces-
sive contaminants such as oil, moisture, or dirt.
EC74/50S Mounting
1.Remove control from case by pushing outward the two clips
on the left and right within case, and carefully lift control
out.
2.Mount case in a vertical position using mounting holes pro-
vided (see Figure 1).
3.Replace control into case by sliding control under tabs at
the top of the case. Push down and clips snap into place.
Figure 1.
Dimensions of EC74/50S
Conduit Connections:
1.Remove desired center knockouts by placing screwdrivers
on inner ring groove by the arrow (see figure 2), then care-
fully apply a solid rap on the handle of the screwdriver with
hand or hammer.
2.Remove outer ring, if necessary, by placing screwdriver
into groove by the arrow (see figure 2) and punch inward.
Smooth the opening's rim with round file or knife.
3.Attach conduit connector first to the conduit, then attach
the conduit connector to the knockout hole using the con-
nector lock nut. To prevent unnecessary stress on enclo-
sure walls, conduit should be aligned and supported.
Wiring:
Figure 2. Knockouts
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1.Wire 24, 120 or 240 Vac to input terminals, depending on
the model selected. Terminals can accommodate 12 to 24
AWG wire. CAUTION: Damage will occur to unit if incorrect
voltage is applied. Application of incorrect input voltage will
void warranty.
2.Connect output wiring as required for the particular appli-
cation.
3.Install a 9V alkaline battery (not provided). Remove battery
cover. See Figure 3 below. Snap battery into battery clip.
Replace battery cover.
4.Maintenance-The EC74/50S has been carefully engineered
for reliability and safety; therefore, the only maintenance
required is to replace the 9V battery approximately every
two years. A battery log is provided to write down battery
replacement dates. Do not use any type of cleaning agent
on the liquid crystal display or the front panel.
Figure 3. Battery Cover
IV. CONTROL DESCRIPTION
Figure 4. Front Panel
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Front Panel
1.Time/Date Indicator-Displays hours and minutes in 12/24
hour format (for example, 00:00=midnight, 12:00=noon) or
month and date for current day or an event being pro-
grammed or revised.
Day of Week Indicator-Displays current day of week or
day being programmed. (Sunday=1, Monday=2,
Saturday=7)
2.Mode Keys-PRG (program), CLK (clock), HOL (holiday),
RUN used to select mode of operation.
3.Number/Day Keys-Used to select circuit number, and set
or program time, day, date and year.
4.Clear Key-Must be used to clear an old entry before a new
one may be entered and to clear keying errors.
5.AM/PM Key-Used to select 12-hour clock format and AM
or PM in program and clock modes.
6.Event TYP (type) Key-Used to select ON, OFF, or momen-
tary event type.
7.Manual OVR (override) Key-Used to toggle relay state
until next event.
8.DUR (duration) Key-Used to program length of momen-
tary pulses.
9.E (enter) Key-Used to enter a new set point and advances
to allow review of program.
V. PROGRAMMING INSTRUCTIONS
The EC74/50S is easy to program. The sequence outlined
here is the logical order of programming. First, you will want
to program the time-of-day, day of week, date, and year.
Then you can program set points according to your applica-
tion (refer to Application Examples, Section VI for sample
programming). You program the start time of the set point
only, and you do not program the stop time. The starting of
the next programmed set point terminates the present set
point.
For your convenience, the control can be programmed with-
out line power by using battery carryover. Relays, however,
will not operate without line power.
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NOTES:
1.When the unit is first powered, the display will show “24
Hr.” Press the Enter key to select 24 hour format. Press the
AM/PM key to select 12 hour format. (The display will
change to midnight on Sunday with the period flashing.)
2.The unit's memory can be cleared by disconnecting line
voltage and carryover battery.
3.For relay state to change, time must run through the set
point starting time (for example, programming an 8:00 a.m.
start time when it is already 9:00 a.m. will not change relay
state); use override to change state immediately.
4.A zero must precede the hours, minutes, month and dates
which are less than ten (Example-04/01 is April 1st).
5.The day of week is displayed as follows: 1=Sunday,
2=Monday, 3=Tuesday, 4=Wednesday, 5=Thursday,
6=Friday, 7=Saturday, and 8=Holiday.
6.In all programming modes, if a keying error is made, press
CLR then reprogram entire sequence of number keys.
7. 24-Hour Clock Time 12-Hour Clock Time
0:00 12:00 AM (Midnight)
1:00 1:00 AM
2:00 2:00 AM
3:00 3:00 AM
4:00 4:00 AM
5:00 5:00 AM
6:00 6:00 AM
7:00 7:00 AM
8:00 8:00 AM
9:00 9:00 AM
10:00 10:00 AM
11:00 11:00 AM
12:00 12:00 PM (Noon)
13:00 1:00 PM
14:00 2:00 PM
15:00 3:00 PM
16:00 4:00 PM
17:00 5:00 PM
18:00 6:00 PM
19:00 7:00 PM
20:00 8:00 PM
21:00 9:00 PM
22:00 10:00 PM
23:00 11:00 PM
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A. To Program Time, Day Of Week, Date, Year, And
Daylight-Saving Time
NOTE: If in 12-hour clock format, P.M. is signified by a dash
at the upper right of the display.
Step Key Description
1CLK Time and day of week on display vanish and
dashes appear for each digit.
2#### Key in time and day of week. If in 12-hour clock
format, and in PM hours, press PM key; dash
will appear at far right of display.
3EEnters time and day of week. Default date of
January 1 appears.
4CLR Date vanishes and dashes appear for each digit.
5#### Key in date. (Month is first and day is second in
both 12-hour and 24-hour mode.)
6EDate is entered. Latest or default year is dis-
played.
7CLR Clears year.
8## Key in current year. Two keys must be pressed
(i.e., “87”).
9EEnters year. “SPr” appears (spring daylight-sav-
ing time).
10 ### Key in date (month/day) of spring daylight-sav-
ing time, if desired. (If not desired, proceed with
step 11.)
11 EEnters spring date. “FaLL” appears (fall day-
light-saving time.)
12 #### Key in date of fall daylight-saving time, if
desired. (If not desired, proceed with step 13.)
13 EEnters fall date. Control returns to RUN mode.
B. To Review Date, Year, and Daylight-Saving Time
Step Key Description
1CLK Dashes appear for time and day of week.
2EMonth and day appear.
3EYear appears.
4EDate of spring daylight-saving time appears.
5EDate of fall standard daylight time appears.
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C. To Program Set Points
The EC74/50S offer three event choices: ON, OFF, or pulse
(momentary contact) event. The EC74/50S has 50 set points
assignable to any or all of the four channels.
NOTES:
1.A set point can be assigned to any single day or to any
combination of days.
2.Programming a set point involves two stages: the first
screen displays circuit (channel) number to be programmed
and the second screen displays event type.
3.The “E” key serves as a forward advance key. The “9”
serves as a reverse key.
Step Key Description
1PRG “cir” for first event is displayed, if no previous
set points have been programmed (press E key
to advance past previous programming.)
21, 2, 3 Key in circuit number.
or 4
3EEnters circuit number; “--.-- -” appears.
4#### Key in time of event (and A.M./P.M. if neces-
sary).
5#Key in day(s) of week and holiday if desired. If
more than one day is desired, key in additional
days. (Days programmed will flash on display in
sequence.)
NOTE: A day already entered can be removed by pressing
the number key representing that day.
6TYP Select a single event type. Press once and a
dash appears on the lower right of the display
selecting an ON event. Press TYP key a second
time to remove dash from lower right of display
selecting an OFF event. Press TYP key a third
time and a flashing dash appears on the lower
right of display selecting a pulse (momentary
contact) event.
7EEnters set point.
Repeat steps 2-7 for other set points.
8RUN Exits programming mode.
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D. To Review Set Points
NOTE: Remember that by using the 9 key you can review set
points in reverse order. For instance, if you have programmed
all 50 set points and wish to review set point number 50,
instead of pressing E fifty times, press 9 once to review it.
Step Key Description
1PRG Circuit number for set point number one is dis-
played.
2ETime of day, day of week, and event type for set
point number one in channel one are displayed.
3ECircuit number for set point number two is dis-
played.
4ETime of day, day of week, and event type for set
point number two are displayed.
Repeat steps 3 and 4 to review remaining set points in all
four channels, until “cir” only appears (indicating no more set
points are programmed.)
5RUN Exits programming mode.
E. To Program Pulse (Momentary) Duration
NOTE: A duration must be assigned to each circuit (channel)
having a momentary event.
Step Key Description
1DUR Duration is displayed for circuit 1 (i.e., “01”; one
second is the default). Circuit number appears
in the lower right of display.
2CLR Duration vanishes and two dashes appear.
3## Key in desired pulse duration in seconds for cir-
cuit 1.
4EEnters duration. Duration for circuit 2 is dis-
played.
Repeat steps 2-4 for circuits 2, 3 and 4.
5RUN Exits pulse duration mode.
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F. To Review Pulse Duration
Step Key Description
1DUR Duration is displayed for circuit 1.
2EDuration is displayed for circuit 2.
Repeat step 2 for remaining channels.
3RUN Exits review.
G. To Initiate Manual Override
NOTE: Program can be overridden temporarily or until the
next set point. If not toggled back out of override, override
will stay in effect until next set point. When circuit (channel) is
overridden, LED changes status.
Step Key Description
1OVR “cir” is displayed.
21, 2, 3 Override takes effect immediately.
or 4
Repeat steps 1 and 2 to return to initial state, if desired.
3RUN Exits review.
H. To Program Holiday
NOTES:
1.On programmed holidays, the special holiday schedule for
each of the four circuits applies.
2.For a single day holiday, program the end month/day the
same as the start month/day.
3.The E key is a forward advance key.
4.The EC74/50S has 16 holidays. Holidays may be one day
or a holiday interval may be up to 366 days. The start and
end dates need not be in the same calendar year. A multi-
ple day holiday counts as a single holiday.
Step Key Description
1HOL “H.01s” (holiday #1 start) is displayed.
2#### Key in holiday start date (month/day).
3EEnters start date and “H.01E” (holiday #1 end) is
displayed.
4#### Key in holiday end date.
5EEnters end date and “H.02s” is displayed.
Repeat steps 2-5 for additional holiday durations.
6RUN Exits holiday mode.
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Indice
