MC22LV SERIES
– MASTER CLOCKS
REV 3/17/15
APPLIED TECHNICAL SYSTEMS
PAGE 9
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
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