EAPL ST-15M2 User manual

OPERATING INSTRUCTIONS
Model : ST-15M2
OPI No.:
PAGE :
DATE :
Front Panel Layout: Terminal details
Model Time range Source Voltage No. of outputs
ST- 15M2 0.01Sec to 99Hrs 59 Mins. 85V AC/DC to 270V AC/DC 15 Triac output
SIGN
&
DATE PREPARED BY: CHECKED BY: APPROVED BY:
ISSUE # May/2007
EAPL
S1 S2 DP1 DP2 A1 A2
OP1 OP2 OP3 OP4 OP5 OP6 OP7 OP8 OP9 OP10 OP11 OP12 OP13 OP14 OP15
RUN PROG
RESTART HOLD
INDIVIDUAL COPY ALL
ELECTRONIC AUTOMATION PVT.LTD.
ST - 15M2
SEQUENTIAL TIMER
ON
OFF
SEC / SEC
MIN / SEC
HRS / MIN
SEQUENCE SELECT ADVANCE
1A
A1 & A2 : Power
S1 & S2 : External Start Command (Potential Free)
DP1 & DP2 : Differential Pressure Command (Potential Free Shorting)
Also available with 24V DC potential Input
OP1 to OP15 : Triac outputs (500mA @250V AC)
ST-15M2 model is microcontroller based sequential timer with 15 channel outputs. The time range for ON and OFF can
be selected from 0.01 Secs upto 99 Hrs. 59 Mins.
Special Features:
RUN: When the slide switch on the front panel is kept in the RUN position, the timer is ready for operation.
PROG: When the slide switch on the front panel is kept in the PROG position, it enables the timer for programming.
HOLD: When the slide switch on the front panel is kept in the HOLD position, the timing data is retained in case of power failure.
Upon resumption of power the timing continues from the point where it had stopped.
RESTART: When the slide switch is kept in the restart position, the timer resets in case of power failure and starts from beginning
upon power resumption.
INDIVIDUAL: When the slide switch is kept in the INDIVIDUAL position, each channel can be programmed.
COPY All: When the slide switch is kept in the COPY ALL position, programmed ON/OFF time of the first channel shall be copied
to all 15 channels & further programming is disabled.
SEQUENCE: Press sequence to select channel 01 to 15.
SELECT: Press SELECT for all the parameters of programming such as to program most and least significant digit, to select the
time range.
ADVANCE: Press ADVANCE to increment the ON & OFF time.
EXTERNAL START COMMAND: The external command from PLC/DCS can be initiated by shorting S1 & S2 terminals
(Potential Free) and sequence will work till the terminals S1 & S2 are kept shorted. On release, the sequence in progress will complete its
time & then stop,even if differential pressure switch is in healthy condition. Once again, if S1-S2 is closed, it further continues depending
on HOLD/RESTART mode.
DIFFERENTIAL PRESSURE SWITCH: DP1 & DP2 can be connected to DP switch, during operation these terminals has to be
shorted and sequence will work till the terminals DP1 & DP2 are kept shorted. On release, the sequence in progress will complete
its time & then stop, even if external start command (S1 & S2) are shorted. Once again, if DP1-DP2 is closed, it further continues
depending on HOLD/RESTART mode.
The timer will run in cyclic mode as long as S1,S2 & DP1,DP2 are shorted.
NOTE: Input triac supply should be only 240V AC
OPI/070
01 0f 02
22/05/2007

OPERATING INSTRUCTIONS
Model : ST-15M2
OPI No.:
PAGE :
DATE :
SIGN
&
DATE PREPARED BY: CHECKED BY: APPROVED BY:
ISSUE # May/2007
EAPL
How to program the timer:
1. Slide the RUN / PROG switch to PROG mode.
2
3. Press ADVANCE to select the range (S/S , M/S , H/M ).
4. Press SELECT, Most significant digit starts flashing.
5. Press ADVANCE to increment the flashing digit.
nd
6. Press SELECT again, 2 digit starts flashing.
rd
7. Press SELECT again, 3 digit starts flashing.
th
8. Press SELECT again, 4 digit starts flashing 0. This digit cannot be advanced in S/S range. Press SELECT again
the set value is saved in memory, depending on the position of the switch (INDIVIDUAL or COPY ALL)
9. Timing display shows rng & OFF LED comes on.
10.Repeat steps from 3 to 8 to program OFF time.
st
11.After completion of 1 channel, press SEQUENCE to increment next channel, if individual programming is
selected.
12.Select the mode of operation (HOLD or RESTART) by moving the HOLD / RESTART slide switch.
After programming the timer, keep the RUN/PROG slide switch in the “RUN” position. Now the unit is ready for
operation.
How to initiate the sequence:
Short S1 & S2 and DP1 & DP2 Terminals
Timer starts operating with On time of the first channel followed by OFF time and then the next channel till channel
15. After the completion of 15 channels, timer comes back to first channel & continues as long as both S1 & S2 and
DP1 & DP2 are applied.
Caution:
While Timer is running, if S1, S2 or DP1, DP2 shorting is removed, timer completes the current channel and stops.
Upon shorting the signal timer starts from first channel or continues from the next channel depending on the position of
RESTART / HOLD switch.
Do not try to change any program parameters when the units is in run mode to avoid malfunctioning of the timer
. Apply rated voltage across A1 & A2, sequence display shows 01 timing display shows rng. ON LED comes on.
22/05/2007
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OPI/070