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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)

2

Содержание EC74/50S

Страница 1: ...5 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...

Страница 2: ...t 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...

Страница 3: ... 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 rou...

Страница 4: ... 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 clea...

Страница 5: ...o 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 ...

Страница 6: ...ely 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...

Страница 7: ...r and 24 hour mode 6 E Date is entered Latest or default year is dis played 7 CLR Clears year 8 Key in current year Two keys must be pressed i e 87 9 E Enters 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 E Enters spring date FaLL appears fall day light saving time 12 Key in date of fall dayl...

Страница 8: ...nce past previous programming 2 1 2 3 Key in circuit number or 4 3 E Enters 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 6 TYP Sele...

Страница 9: ...d 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 5 RUN 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 1 DUR Duration is displayed for circu...

Страница 10: ... 3 RUN 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 t...

Страница 11: ...u want to turn ON the lights at 7 00 A M and turn them OFF at 3 00 P M each weekday using channel 1 Suppose also that you want the lights left OFF on two holi days Independence Day July 4 a one day holiday and Christmas December 24 and 25 a two day holiday Step Key Description 1 PRG cir is displayed if no set points were previous ly programmed 2 1 Key in circuit number 3 E Enters circuit number 4 ...

Страница 12: ...dicating an OFF event 14 E Enters set point 15 RUN Exits programming mode 16 HOL H 01s holiday 1 start is displayed unless other holidays have been previously pro grammed 17 0 7 Key in first holiday start date 07 04 for July 4 0 4 18 E Enters start date H 01E holiday 1 end is displayed 19 0 7 Key in first holiday end date one day holiday 0 4 20 E Enters end date H 02s is displayed 21 1 2 Key in se...

Страница 13: ...et points were previously programmed press E key until cir appears 2 2 Key in circuit number 3 E Enters circuit number 4 0 7 Key in time for first bell 5 0 5 2 3 4 Key in weekdays display continues to roll 5 6 through each number selected 6 TYP Press this key three times a flashing dash appears on the lower right of display indicating a pulse momentary contact event 7 E Enters set point Repeat ste...

Страница 14: ...tching Relay Wiring Diagram Objective To operate latching relays turning ON and OFF lighting Suppose you want to turn ON lights at 8 00 A M and turn them OFF at 5 00 P M each week day using channels 3 and 4 and remote latching relay or mechanical contactor Suppose also that you want a sweep to turn OFF lights at 10 00 P M for any lights turned ON with the remote momen tary override switch shown in...

Страница 15: ...pears on the upper right of display indi cating P M 12 2 3 4 Key in weekdays 5 6 13 TYP Press key three times a flashing dash appears on the lower right of display indicating a pulse event 14 E Enters set point cir is displayed 15 4 Key in circuit number for sweep 16 E Enters circuit number 17 1 0 Key in sweep OFF time 0 0 18 PM Dash appears on the upper right of display indi cating P M 19 2 3 4 K...

Страница 16: ... meaningless Control does not operate after programming Solution Review programmed set points making sure the day has not been skipped Check input power to control Insure the clock is not in a holiday mode Day 8 Check if manual override changes the load s state i e ON to OFF OFF to ON If it does not see next problem solution Check the load for proper wiring Remember the EC74 50S contacts switch on...

Страница 17: ...ompany product which has been tampered with or repaired by other than an Authorized Service Center of Maple Chase Company or at its factory nor to any product which has been subject to misuse neglect accident or damage or which has not been properly installed and tested in operation Under no circumstances shall Maple Chase Company be liable to purchaser or any third party for any loss of profits o...

Страница 18: ...110 699 Maple Chase Company 2820 Thatcher Road Downers Grove Illinois 60515 Made in Mexico Telephone 1 800 732 8400 ISO 9002 registered An Invensys company ...

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