XTDU303 / XTDC303 · ASYMMETRICAL CYCLIC

ASYMMETRIC DIGITAL CYCLICAL TIMER

Description
Especifications

XTDU303 / XTDC303 digital asymmetrical cyclic timer: precise ON / OFF cycles with both times on the display. 0.01 s to 99.9 h, IP65.

Product type:	Digital asymmetrical cyclic timer
Installation:	48 × 48 mm panel: 11-pin socket (U) or plug-in connectors (C)
Functions:	4: 2 asymmetrical cyclic and 2 single-cycle
Times:	T1 and T2 independent

Features

✓ON / OFF cycles with independent T1 and T2 times
✓2 asymmetrical cyclic functions and 2 single-cycle functions (double timing)
✓Both times and the setpoint visible on the display
✓Multi-range from 0.01 s to 99.9 h
✓Output and time base status LEDs
✓Memory after a power cut, IP65 front and transformer supply
✓U version with 11-pin socket or C version with plug-in connectors

Supply

24 … 230 VAC · 12/24 VDC

Output

1 x SPDT 8A

Times

0.01 s … 99.9 h

Format

48 × 48 · IP65

Documentation

Datasheet Request information Custom unit

How it works

1With the unit de-energised, the function and ranges are selected with the side DIP switch.
2Time 1 (T1) and time 2 (T2) are programmed separately from the front.
3In asymmetrical cyclic mode, when the start contact closes (or on power-up if it is already closed) T1 starts; at its end the output switches on and T2 starts.
4At the end of T2 the output switches off and the cycle starts again; the count stop input halts the clock.

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Frequently asked questions

Are ON and OFF set separately?

Yes, T1 and T2 are programmed independently and both are shown on the display.

What is the difference between XTDU303 and XTDC303?

The same functions: the XTDU303 connects on an 11-pin socket and the XTDC303 has plug-in connectors.

What is double timing?

A single cycle with two consecutive times (T1 and T2), in normal or inverted version.

General information

References	XTDU303 (11-pin socket) · XTDC303 (plug-in connectors) (24 / 48 / 110 / 230 VAC · 12 / 24 VDC)
Series	X · 48 × 48 mm panel
Product type	Digital asymmetrical cyclic timer

Electrical specifications

Supply	24 / 48 / 110 / 230 VAC · 12 / 24 VDC
Supply type	Transformer (VAC)
Consumption	2.3 VA
Output	1 x SPDT 8A 250 VAC
Control inputs	Start · count stop · reset

Times and functions

Range	0.01 s to 99.9 h
Times	T1 and T2 independent
Ranges	0.01–9.99 · 0.1–99.9 · 1–999 (s, min, h)
Functions	4 (A to D), by side DIP switch
Memory after power cut	Selectable

Indications

Display	Time 1, time 2 and setpoint
LEDs	Output on and time base

Housing and mounting

Format	48 × 48 mm
Panel cut-out	45 × 45 mm
Fixing	Snap-in bracket
Front	IP65
Material	Grey polycarbonate UL94-V0
Weight	≈ 170 g

Environmental conditions

Operating temperature	−10 to +55 °C
Storage temperature	−25 to +85 °C

Standards and certifications

Compliance

CE · 2014/35/EU · 2014/30/EU

Working functions

Function	Description
A	Asymmetrical cyclic
B	Inverted asymmetrical cyclic
C	Double timing
D	Inverted double timing

Accessories

ZB11-0 · 11-pin socket for DIN rail · PG11 · 11-pin socket with rear screw · TBEU1E · 11-pin in-line socket · MA7248 · frame from 72 × 72 to 48 × 48 mm · MA9648 · frame from 96 × 96 to 48 × 48 mm · MA96D48 · frame from 96 × 48 to 48 × 48 mm