Pyrotech Electronics Pvt. Ltd. (Unit - I)

SEQUENCE TIMER (µST-19A)
MODEL CODES
Model                           µST–19A
Type                             Relay output.
INPUT/OUTPUT
Input                             Sequence cycle ON contact.
Output                          One relay c/o contact for each channel.
Contact rating                6A at 230VAC.
DISPLAY
Display             (A) Channel no./Set time/Balance time on 7 segment display.

(B) Channel on/off/bypass indication by LED.
Size of digit                   0.5”.
BI colour LEDs  Separate bi colour LED for on/off/bypass channel indication.

(A) On duration – Green

(B) Off duration – Red

(C) Ch.bypass – Yellow
Red colour LEDs            5 mm size for prg/run mode, unit(hr., min., sec., msec.), on, off, pause time status indication.
MODE OF OPERATION
On duration units           msec/sec/min selectable through front key common for all channel.
Off duration                    Sec./min. selectable through front key common for All channel.
Pause time(at end of each cycle) unit Min/hr.selectable thru front key.
Pause time duration max. no. of channels 24
On duration                   Settable individually for each channel.
Off duration                    Settable individually for each channel.
Channel bypass Settable individually for each channel.
GENERAL SPECIFICATION
Accuracy                                                
(A)    Sec. delays                                         
(B)    Min. delays                       
(C) Hr. delay
±0.5% of range
±0.5% of range
±0.5% of range
No. of channel               1-24 nos. factory set.
Max. no.of operational ch. Ranges Settable through front key.
(A) On time duration
(B) Off time duration  
(C) Pause time duration

1-999 msec. or 1-999 sec. or 1-9 min.
1-999 sec. or 1-99 min.
0-999 min. or 0-9 hrs.

INSTALLATION
Power supply     90-270 VAC, 50Hz
Power Fuse 2 A.
Operating Ambient
-Temperature    

0-55°C
-Humidity          5 –95 % RH.(Non condensing).
Storage temp.    0° - 60°C
Mounting          

Field mounted.
Housing                       

High impact ABS.
Terminals                      Suitable for conductors upto 1.5mmsq. wire only.
Protection Class           

Suitable for conductors upto 1.5 Sq. mm wire only.
Cable entry                   

4/6 cable gland size 1/2”.
Size                             

266(W) X186(L)X96(D) in mm.
SPECIAL FEATURES :-
Optical isolation between input and output.
“ALL BPAS” message flash on seven segment when all channels are bypass.
“OPEN” flashing indication after current channel if initiation contact opens.
New data selected through front key are implemented in the channel next to the channel on display or if reset key (up & down key  pressed simultaneously ) pressed.
Reset (up & down key pressed simultaneously) key provided if user wants the cycle to restart from beginning. 
Key lock provision to avoid programmed data tampering.
On power off, on/off status, balance time left and channel number are saved
During run mode, run mode LED flashes to indicate healthy functioning of system.
A set of three keys (mode, up and down) provided for programming and resetting function.
If the system is in pause time period during power off state then at power on system sequence starts from beginning.
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