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
