Selec Timer XT56 – Specifications, Wiring, DIP Switch Setting & Working

A process take some time to get finished but every second is important in industry. We can’t even waste 1 sec extra on processing OR we can’t stop the process before proper finishing. Process should be stopped at desired final stage. Timing is important, That’s why Automation is adopted to utilize every passing time. 

In industries, Timers are utilized that’s continuously runs with the process; whenever process reaches its final stage it finishes the process. For industrial process, We can use timers anywhere according to our need but we must know how these timers works. 

SELEC TIMER XT56

Overall dimensions 

Specifications of timer XT-56

1. Display : 3 digits, 0.3″ Height, Red LED
2. Set point : Single set point
3. Supply : 90 to 270V AC/DC, AC: 50 or 60 hz
4. Reset time : Less than 100 msec
5. Count Direction : Down
6. LED Indication : Relay status
7. Output : 2 C/O(DPDT)
8. Relay Rating : 5A@ 230VAC/24VDC
9. Mounting : Panel mounting
10. Housing : CE marked products : Flame retardant plastic | Non CE products :ABS plastic
11. Temperature : Operating : 0 to 50°C | Storage : -5 to 55°C
12. Humidity : 95%RH
13. Weight (gm) : 170
14. Time ranges : 9.99, 99.9, 999 sec.| 99.9, 999 min.| 99.9 hr.
15. Time Setting : By push wheel switches
16. Accuracy : plus-minus 0.05%
17. Start Input : Pulse Start
18. Delay modes : On delay/ Interval. There are two modes in this timer:  1st is on delay which means relays operates after the set time as name suggests. 2nd is interval mode which means relay starts instantly as it gets the start command & remains operated for set time.

Reset options

  There are 3 options to reset the timer.

1.       Front panel reset : A small reset button is provided in front of the timer. Above the reset button relay indicator is provided which glows when relay gets operated.
   
2.       Remote reset :  This reset works from terminals. Just short the terminal 9 with 10.
3.      On power interruption : When power supply to timer breaks; timer automatically get reset.

Terminal connections

• There are two power supply terminals 6,7 . Timer works on both AC & DC from 90 to 270 Volts.
• There are two relays, each relay constitutes three terminals 1st is common, 2nd is NC & 3rd is NO.
• Terminals 3,4,5 constitutes relays 1 where  terminal 4 is common,3 is NO & 5 is NC .
• Terminals 1,2,11 constitutes relay 2 where terminal 1 is common, 11 is NO &  2 is NC .
• There are terminals to start & reset the timer. Terminal no.12 is start & No.9 is reset terminal.
• To start, Terminal 10 GND shorted with the terminal 12.
• To reset, Terminal 10 GND shorted with the terminal 9.

Timer DIP switch setting

This timer is provided with only 3 wheel switches. With these three wheel switches; time digits can be set.

To change the timer mode & time units; DIP switch mode is provided. In this DIP switches, there are 4 switches 1,2,3 & 4.

1st switch is used to set the ‘MODE’ & remaining 3 switches are used to set the ‘TIME UNITS’. 

SWITCH 1

 If switch 1 is off, timer will work as on delay timer.

 If switch 1 is on timer will work as off delay timer or interval timer.

SWITCH 2,3&4

Combination of these three switches used to set time units & time resolution.

How to Set Time in Selec XT56 (Step-by-Step)

1. Select time unit using DIP switches

2. Select mode (On delay / Interval)

3. Set value using push wheels

4. Provide start signal (10–12)

5. Check relay indication

Practical applications of timer XT56

To understand the practical application of the Timer an example is discussed next.

We are taking a case where a 3phase 3.7 kW Monoblock pump is running on DOL Starter. Once it started, it must run for 30 minutes. After 30 minutes, pump needed to be stopped & run again only when we start the pump again. 

” Every time pump must run for 30 minutes !”

1. First set the DIP switch setting

SW1, SW2, SW3, SW4 = ON, ON, OFF, OFF

SW1(ON)- Timer will work in Interval mode.

SW2(ON), SW3(OFF), SW4(OFF)- Time units will be in minutes with no decimal point. Set the wheel switch at 030

2. Circuit wiring

We also need to provide start signal to the controller which can be provided by just shorting the two terminals 10&12 of the timer. (shown in above image 2)

Common Problems & Troubleshooting

Examples:

Timer not starting

• Check supply at terminals 6–7

• Check start signal (10–12)

Relay not operating

• Wrong DIP mode

• Output wiring issue

Wrong timing

• Incorrect time unit setting

• Push wheel value mismatch

FAQs  for time XT-56

Q1. What is the supply voltage of Selec XT56?
90–270V AC/DC.

Q2. How many relays are available in XT56?
Two changeover relays (DPDT).

Q3. What is the panel size of Selec XT56?
48 × 48 mm.

Q4. What modes are available in XT56 timer?
On delay and interval mode.

Q5. How to reset Selec XT56?
Front reset button or remote reset (terminal 9–10).

SUMMARY

Timers are utilized that’s continuously runs with the process; whenever process reaches its final stage it finishes the process. In this post, Timer XT-56 by SELEC is discussed.

This timer  may not meet the features of modern timers but function always remains the same. This post is an example which shows how timers are utilized. Multiple types of circuits, Multiple types of applications can be made with a single device if method of utilization is learnt.

Hope! You like the post. If you have any doubt, suggestion or query. Please do comments.