SELEC MULTIFUNCTION TIMER XT546

SELEC MULTIFUNCTION TIMER XT546 – High-Precision Dual-Display Digital Industrial Timer

The SELEC MULTIFUNCTION TIMER XT546 is a versatile $48\text{ mm} \times 48\text{ mm}$ ( $1/16\text{ DIN}$ ) panel-mount digital timer engineered for precision time-based control across automated manufacturing processes. Featuring a dual 3-digit, 7-segment LED display, this controller continuously shows the active run time (Process Value in bright red) and configured set time (Setpoint Value in clear green).

Offering four selectable operating modes—ON Delay, Interval Delay, Cyclic ON First, and Cyclic OFF First—the SELEC MULTIFUNCTION TIMER XT546 covers 9 wide timing ranges spanning from $0.01\text{ seconds}$ to $999\text{ hours}$ . Equipped with dual SPDT output contacts ( $2 \times 1\text{ C/O}$ rated at $5\text{ A}$ / $250\text{V AC}$ ), universal power input capabilities ( $85\text{ to }270\text{V AC/DC}$ ), and non-volatile memory retention, this compact unit delivers reliable time-based control for industrial panels.

As shown in the product image, the timer features an IP65-rated front faceplate equipped with tactile rubber buttons (SET, PROG, LCK, RST) for fast parameter setup and configuration locking.

Key Features of the SELEC MULTIFUNCTION TIMER XT546

Dual 3-Digit Seven-Segment Display: Displays live countdown/count-up elapsed time and target set value simultaneously for instant operational monitoring.
4 Programmable Operating Relay Modes: Supports ON Delay, Interval Delay, Cyclic ON First, and Cyclic OFF First modes to cover complex machine sequences.
9 Field-Selectable Time Ranges: Adjusts timing limits from $0.01\text{ sec}$ up to $999\text{ hours}$ (seconds, minutes, and hours) in a single device.
Dual SPDT Relay Outputs: Features two independent changeover contacts ( $2 \times 1\text{ C/O}$ rated at $5\text{ A}$ @ $250\text{V AC}$ ) for simultaneous control of multiple loads or auxiliary signaling.
Flexible Start & Reset Inputs: Accepts programmable Gate/Pulse start signals alongside Front Key, Remote Terminal, and Power-Interruption reset methods.
Memory & Security Protection: Includes EEPROM memory retention to preserve settings during power loss, plus password parameter locking to prevent tampering.

Common Applications and Industrial Usage

The timing precision, multi-mode functionality, and wide voltage rating of the SELEC MULTIFUNCTION TIMER XT546 make it suitable for a wide range of industrial automation applications:

Packaging Machinery & Heat Sealers: Controls seal-jaw dwell times, cutter delays, and automated conveyor index cycles with sub-second accuracy.
Plastics & Injection Molding: Manages mold-clamping intervals, hydraulic ejction timing, and auxiliary material feeder cycles.
Industrial Pumps & Lubrication Systems: Drives cyclic lubrication pumps (Cyclic ON/OFF modes) to keep machinery bearings lubricated at scheduled intervals.
Motor Control Centers (MCC): Delivers precise start delays and sequence timing for star-delta motor starters and ventilation blowers.

Technical Specifications

The core electrical, mechanical, and operational parameters for the SELEC MULTIFUNCTION TIMER XT546 are detailed below:

Parameter Specification	Technical Details & Operational Values
Component Classification	Digital Panel-Mount Multifunction Timer
Primary Target Keyword	SELEC MULTIFUNCTION TIMER XT546
Manufacturer / Part Model	SELEC Controls / `XT546`
Display Type & Size	3-Digit Dual 7-Segment LED / $48\text{ mm} \times 48\text{ mm}$ ( $1/16\text{ DIN}$ )
Selectable Operating Modes	ON Delay, Interval, Cyclic ON First, Cyclic OFF First
Selectable Time Ranges	$0\text{--}9.99\text{s}$ , $0\text{--}99.9\text{s}$ , $0\text{--}999\text{s}$ , $0\text{--}9:59\text{m:s}$ , $0\text{--}99.9\text{m}$ , $0\text{--}999\text{m}$ , $0\text{--}9:59\text{h:m}$ , $0\text{--}99.9\text{h}$ , $0\text{--}999\text{h}$
Output Contacts	2 SPDT ( $2 \times 1\text{ C/O}$ ), Rated $5\text{ A}$ @ $250\text{V AC} / 24\text{V DC}$
Timing & Setting Accuracy	$\pm 0.05\%$ of set time or $50\text{ ms}$ (Whichever is greater)
Auxiliary Supply Voltage	$85\text{ to }270\text{V AC/DC}\ (50/60\text{ Hz})$ or $24\text{V AC/DC}$ optional
Reset Options	Front Keypad, Remote Terminal (RST), Power Interruption
Memory Retention	Yes (Non-volatile EEPROM storage)
Operating Temp / Humidity	$0^\circ\text{C to }+50^\circ\text{C}$ Max $95\%\text{ RH}$ (non-condensing)
Weight & Ingress Rating	Approx. $142\text{ g}$ / IP65 for Front Faceplate

Operating Guidelines and Best Practices

INSTALLATION TIP: Fit the timer securely into the panel cutout ( $45\text{ mm} \times 45\text{ mm}$ ) using the included side mounting clamp to maintain the IP65 front seal.

Cyclic Mode Configuration: When setting the SELEC MULTIFUNCTION TIMER XT546 to Cyclic modes ( $t_1$ and $t_2$ ), ensure set values match your specific valve or pump duty cycle to avoid short-cycling electrical loads.

Signal Line Isolation: Route remote Start (START) and Reset (RST) input wires separately from high-voltage motor power cables to prevent electromagnetic noise from triggering false starts.

To review official international IEC standards for measurement, control, and laboratory equipment safety, consult the official IEC 61010-1 Safety Requirements Directory.

To evaluate real-time regional warehouse stock availability or request commercial quotes for bulk procurement needs, please connect with our sales branch via the Control Qatar Contact Page.