ATS MC22LV Series User manual

MC22LV SERIES
MASTER CLOCKS
FN:MC22LV-M1.DOC

MC22LV SERIES –MASTER CLOCKS
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TABLE OF CONTENTS
1.0 INTRODUCTION
2.0 SPECIFICATIONS
3.0 INSTALLATION
4.0 GETTING STARTED
4.1 The Auto-Prompt Display
4.2 The Cursor, Entering Data
4.3 Applying Power, Entering Time
4.4 Entering the Date
4.5 Entering the Day
4.6 Daylight Savings Time
4.7 Entering Pulse for Relays 1 and 2
4.8 Basic Plan
5.0 OPERATION
5.1 Editing Time
5.2 Reviewing or Editing Date
5.3 Reviewing or Editing Day
5.4 Reviewing or Editing Daylight Savings Time
5.5 Reviewing or Editing the Relay Pulse for Relays 1 and 2
5.6 Reviewing or Editing the Basic Plan Program
6.0 PROGRAMMING
6.1 Entering the Basic Plan Program
6.2 Clearing a Program Step
6.3 Entering, Reviewing or Editing the Annual Program
6.4 Clearing an Annual Plan
6.5 Clearing the Annual and Basic Programs
7.0 SPECIAL FUNCTIONS
7.1 Manual Operation of the Output Relays
7.2 Manual Selection of Alternate Plans
7.3 Setting the Maximum Number of Steps Per Plan
7.4 Enter Sleep Mode
7.5 Status
7.6 Forcing a Restart
7.7 Software Version
7.8 Selecting the Time Base
8.0 ADVANCED PROGRAMMING
8.1 Custom Weeks
8.2 Annual Repeat Programs
8.3 RS232 I/O Interface
8.4 Select 12 or 24 Hour Clock Output
PROGRAMMING SUMMARY
The MC22LV is a two-circuit master clock. This manual will use the "MC22LV" and the "Master
Clock" interchangeably.

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1.0 INTRODUCTION
The MC22LV is a two circuit, calendar programmable solid state master clock. It is used for
switching low voltage electric circuits according to a preset time and date program. The
MC22LV's AUTO PROMPTING, alphanumeric display makes programming fast and simple. The
output relays can be used to ring bells, to control audio/visual equipment or to control lighting,
heating, ventilating, air conditioning and security systems with a variety of programming
capabilities, ranging from a simple 7 day plan to a more complex plan utilizing its powerful,
alternate annual programming features. Each has a compact wall mount enclosure. Selected
outputs can be independently programmed for momentary operation such as required for ringing
bells in schools, churches or industrial facilities.
Limited options are available for the MC22LV master clocks.

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2.0 SPECIFICATIONS
PROGRAMMING CAPABILITIES
Auto Prompting Display - Provides display information to guide the operator during programming.
From a restart it will take the operator from setting time clear through setting the basic program
steps.
200 Powerful Program Steps - The MC22LV has a default set up of 1 Basic 7 day plan and 9
Alternate 7 day plans that can be scheduled on an annual basis, or keyboard selected for the
current day. The default setup provides for a total of 10 plans, each having 20 program steps. If
more than 20-program steps are needed, the program size can be increased using a keyboard-
entered function. Up to 100 steps per plan can be programmed for a total of 2 plans. 50 steps
per plan would provide a total of 4 plans. Each step can be programmed for both or any
combination of the output relays for a specific day of the week, or for all 5 weekdays, or for both
weekend days, or for everyday of the week. In addition, steps can be programmed in customized
groups such as, Monday, Wednesday, and Friday only.
20 Annual Plans - Each annual plan has a starting and ending date, and an associated Alternate
Plan. This feature can be used to schedule any 1 of the 1 to 9 alternate, 7 day plans to be used by
the MC22LV. Certain annual plans can be programmed to repeat on a yearly basis so that they
don’t have to be reprogrammed each year.
Sleep Mode –Entering Sleep Mode suspends program operation (all program steps are ignored).
Leaving Sleep Mode, the program resumes at the next scheduled program step.
Programmable Daylight Savings Time Adjustment - The MC22LV can be programmed to
automatically adjust its time for Daylight savings time changes according to U. S. law, even if the
law changes.
Automatic Leap Year Compensation.
Manual Override - The output relays can be manually energized or de-energized from the
keyboard. The word “Manual” replaces the word “Relays” in the time display until the next program
step occurs.
Pulsed Output –Relays 1 and 2 can be programmed individually or as a group to operate as
momentary contacts, programmable from 1 to 9 seconds.
I/O Port –An RS232 I/O port provides an interface for connecting to a computer, or to other ATS
devices such as: Digital Clocks, GPS Systems, Ethernet Interface, and other compatible serial
data products. The RS232 I/O port is provided on the front panel with a DB9 female connector,
and on the terminal blocks inside the enclosure.

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ELECTRICAL
Power: Standard power required is from 20 VAC to 28 VAC, 60 HZ at 8 VA
maximum. A Power Module is provided with 120 VAC input to 24 VAC
500mA output. An optional larger 1.66 Amp Power Module is available
for powering some add-on accessories. Contact the factory for details.
Outputs: MC22LV - Two relays (SPDT) rated at 15A, 48 VAC or 24 VDC resistive.
RS232 I/O: For connecting to a computer, or to other ATS devices such as: Digital
Clocks, GPS Systems, Ethernet Interface, and other compatible serial
data products.
Wiring: A clearly labeled terminal block is provided inside the MC22LV.
.
POWER FAIL BACKUP
Non-Volatile Memory keeps time and programs for indefinite power outages. All outputs and the
display are disabled during backup. The MC22LV resumes normal operation when power returns.
If the master clock has been without power for more than 48 hours a “Unit Power Fail” message
will appear when power is restored. Times and program will be intact, however pressing the [3]
key will begin the AUTO PROMPT sequence. Check time, date, day, etc. to insure accuracy, then
press the [EXIT].
ACCURACY
Time Keeping - Synchronous with the AC power line. During a power failure, or when crystal time
base is selected, timekeeping is crystal controlled with an accuracy of +/- 4 PPM throughout its full
temperature range.
Programmed Events - On/Off events are programmable with a one-minute resolution and occur
at the zero second of that minute.
Operating Temperature Range - 0 to 50 degrees C
PHYSICAL
MC22LV: Black, painted aluminum enclosure - 4.8"W X 8"H X 1.8"D.
Mounting holes are provided in the enclosures for easy installation.

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FRONT PANEL DESCRIPTION
ALPHANUMERIC DISPLAY - Used for displaying time, day, date, and output status, and for
displaying information during programming or reviewing stored programs. In the normal mode of
operation, the display will be in the TIME DISPLAY, showing the day, time, and which relays are
activated.
KEYBOARD - Many keys serve multiple functions. Those keys are clearly labeled with their
functions to the side and top of the key. They cannot be used incorrectly, as the display will
AUTO PROMPT the user as to which key to press.
AM ON KEY [1] - Used for setting the time to AM when in the TIME SET or PROGRAMMING
MODES and for entering the MANUAL CONTROL MODE.
PM KEY [2] - Used for setting the time to PM when in the TIME SET or PROGRAMMING
MODES.
TIME KEY [3] - Used for entering the TIME SET MODE.
ANNUAL KEY [A] - Used for entering the ANNUAL PROGRAMMING MODE and for stepping
through the stored ANNUAL PLAN for review. The ANNUAL PLAN contains the schedule for the
alternate BASIC PLANS in calendar schedule form.
BASIC KEY [B] - Used for entering the BASIC PLAN - PROGRAMMING MODE and for stepping
through the stored BASIC PLANS for review. The BASIC PLANS contain the daily timed events
instructions.
CLEAR KEY [C] - Used for clearing the ANNUAL PLAN and/or BASIC PLANS.
DATE KEY [D] - Used for entering the SET DATE MODE for entering date or reviewing the date.
EXIT KEY [#] - Used for exiting any of the SET TIME, SET DATE or PROGRAM MODES.
OFF KEY [0] - Used for setting the pulse to OFF when in the PULSE PROGRAMMING MODE.
ENTER KEY [*] - Used for entering all commands or for stepping through any SET TIME, SET
DATE or PROGRAM data entry.
DST KEY [7] - Used for entering the SET DAYLIGHT SAVINGS TIME PROGRAM MODE.
DAY KEY [4] - Used for setting the day in the SET DAY and PROGRAM MODES. Also used for
entering the SET DAY MODE.
.

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3.0 INSTALLATION
MC22LV SERIES
The MC22LV should be securely mounted to a suitable mounting panel or surface according to
any local codes using the mounting holes provided. Be sure the equipment is properly grounded
to the panel or the facilities ground connection.
ELECTRICAL CONNECTIONS
All wiring connections are made at the clearly marked terminal block located on the inside of the
MC22LV enclosure, Remove the top cover of the MC22LV to gain access to the terminal block.
MC22LV shown with the top cover removed.
A 120 VAC to 24 VAC
Power Module is provided.
Connects to the MC22LV
Terminals labeled 24 VAC ONLY.
Clearly labeled terminal block is provided
for all field wiring.
Standard Power Module
Optional Larger Power Module
An optional, larger Power Module is
available for powering accessories.
The 0900-7084 provides
24 VAC at 1.67 Amps.
This Power Module is standard on the
MC22-BH and MC22-BP
Series products
Terminal Block Detail

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OPTIONS
There are a variety of options available for the MC22LV. For details on the installation and
operation of the installed option, refer to the Addenda for those options at the back of this manual.
4.0 GETTING STARTED
4.1 THE AUTO PROMPT DISPLAY
The master clock has a feature called Auto Prompt that guides the operator when programming
the unit. For the most part the operator merely has to follow the display as the master clock
advances through the Program Modes. On a restart (from a “power fail” condition) the master
clock will advance through a sequence of all the necessary settings including the Basic Plans. You
may exit this sequence if desired and enter the program manually from the time display, using the
specific commands. Entering a program from the Auto Prompt sequence is identical to entering
one manually.
4.2 THE CURSOR, ENTERING DATA
On many of the display messages you will see a flashing square character called the cursor. The
cursor indicates that you may now enter or change the data at that position of the display. As data
is entered the master clock constantly checks for a valid entry. For example, you cannot enter 13
for a month when setting the date. After entering valid data to a position on the display, the
cursor will advance to the next position. If you have tried to enter invalid data, the cursor will
remain at the same position, indicating you must re-enter the data. Simply re-enter the data on
top of the existing data and press [ENTER]. Generally, data is entered two digits at a time and
shifts left with each entry.
4.3 APPLYING POWER, ENTERING THE TIME
Before power is applied, be sure all installation and wiring is completed to all local codes.
Upon first applying power the display will come up with a brief sign on message showing the
model and version numbers:
After a few seconds the first Auto Prompt message will appear. If the following message does not
appear, read section 7.6 FORCING A RESTART.
Simply press key [3]. The display will prompt with the set time display.
MC22 Master Clk.
Version 4.XX
UNIT POWER FAIL
Press “3” key
Time? 00:00 AM
Hrs. (HH), ENTER

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It may be showing the correct time, some other time, or all “0’s”.
From this point forward you can exit the Auto Prompt sequence at any time, if desired, by pressing
[EXIT]. However, the programming is simplified by staying in the Auto Prompt mode. On a restart
all program memory is cleared in the master clock. The cursor will be flashing in the hour’s digits.
The bottom line is a prompt to enter 2 digits (HH) for hours. Enter the hours then press the
[ENTER] key. Two digits are required for the hours. Example: 01 instead of 1. The cursor will
remain flashing in the hour’s digits if an invalid number is entered for the hours. Enter the correct
hours. Once a valid number is entered for the hours, the cursor will advance to the minute’s
digits. Again, the bottom line is a prompt for entering the minutes. Type two digits for the minutes
and press [ENTER]. The cursor will advance to the AM position. Press the AM or PM key then
press [ENTER]. Time keeping begins the instant you press [ENTER]. Time can be accurately
set to the second by pressing the [ENTER] key at the desired instant.
4.4 ENTERING THE DATE
The next step in the AUTO-PROMPT sequence is entering the date. The display will show:
It may be showing the correct date, some other date, or all “0’s”.
The cursor will be flashing in the month's position. The bottom line will give you additional
information on how to enter the data. Type the two digit number for the month and press
[ENTER]. If the correct two digits are already there, simply press [ENTER]. The cursor will move
to the day position. Type the two digits for the day and press [ENTER]. The cursor will move to
the year position. Type the two digits for the year and press [ENTER].
4.5 ENTERING THE DAY
Next, we enter the day of the week. The display will show:
It may be showing the correct day or some other day stored previously. Press the DAY key [4]
until the desired day is shown on the display and then press [ENTER].
4.6 DAYLIGHT SAVINGS TIME
The default entries for daylight savings time according to current U.S. law will display as follows:
The master clock is pre-loaded with the current daylight savings time settings according to
U.S. law. Unless the law changes or you live in an area that does not follow standard U.S.
daylight savings time there is no need to change anything on the DST screen. The top line
Date? 12-29-15
Month (MM), ENTER
Day? Sun
DAY key, ENTER
S DST M=03 SUN=2
F DST M=11 SUN=1

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is for the Spring DST and the bottom line is for the Fall DST. The S indicates the Spring DST and
the F indicates the Fall DST. The cursor will be flashing in the month position. Enter the two
digits for the month in which you wish the Spring DST adjustment to be made (03 for current US
law), then press [ENTER]. The valid Spring months are 00, 03, 04, and 05. Enter 00 for the
month if you do not wish to use the automatic DST feature and the master clock will advance to
the next Auto Prompt display. After a valid month is entered, the cursor will advance to the L in
the Sunday position. Enter a 2 for the second Sunday (current US law), 2 for the second, 3 for the
third, 4 for the fourth or L for the last Sunday. Use the [5] key to enter the L. The change will be
made at 02:00 AM on the Sunday you choose.
After the Spring DST data is entered, the cursor will advance to the Fall DST line. If you have
entered a Spring DST, you must enter a Fall DST as well. Failure to do so will erase the Spring
DST and then there will be no DST compensation.
Fall DST is entered in the same manner as the Spring DST. Current US law for Fall DST is the
first Sunday in November. Enter 11 for the month and 1 for the Sunday. The valid months for
the Fall DST are 09, 10, and 11. The valid Sundays for the Fall DST are 1, 2, 3, 4 and L. Use the
[5] key to enter the L. The change will be made at 02:00 AM on the Sunday you choose.
4.7 ENTERING PULSE (MOMENTARY OUTPUT) FOR RELAYS 1and 2
The pulse for each relay is preset to 5 seconds for momentary ON/OFF events such as ringing
school bells, or factory break buzzers. It can be changed as desired for up to 9 seconds duration.
A second momentary output of a different duration may be required for late bells or warning bells.
The cursor will be flashing on the "5" for Relay 1. Enter the duration for Relay 1 from 0 to 9
seconds, Press [ENTER]. 0 = Pulse OFF. The cursor will then be flashing on the "5" for Relay 2.
Enter the duration for Relay 2 from 0 to 9 seconds, Press [ENTER]. 0 = Pulse OFF.
For applications requiring steady ON and OFF events, the pulse can be set to OFF for either or
both relays as shown below. If a relay is turned ON with a PULSE SETTING = to OFF, the
relay will stay ON until programmed to turn OFF again with another program step.
The master clock will advance to the next Auto Prompt display.
R1 Pulse= 5 Sec
R2 Pulse= 5 Sec
R1 Pulse= OFF
R2 Pulse= OFF
R1 Pulse= OFF
R2 Pulse= 5 Sec