Schneider Electric CCT15551 Acti9 IHP+ 1C SMARTw Timer

CCT15551 Acti9 IHP+ 1C SMARTw advanced programmable time switch

The CCT15551 is the extended Acti9 IHP+ time switch, in 24 h plus 7 day form with one changeover output. Compared with the plain IHP it adds an external override input, pulse and cycle programming, a random program, a backlit LCD with an operating-time counter and support for a memory stick as optional equipment. It is 45 mm wide on TH35 DIN rail. Seven Star LLC supplies the CCT15551 in Oman and the GCC as an independent supplier based in Muscat.

It allows up to 84 switchings and a minimum interval of 1s, against 56 switchings and 1 min on the plain IHP versions, which matters for process-type and short-pulse tasks.

Where the CCT15551 sits in the IHP range

Choose this model when the application needs short pulses, a manual or building-management override through the external input, or a record of operating hours. For plain weekly schedules the CCT15441 and CCT15443 cover the job with fewer features.

CCT15551 technical specifications

Advanced functions of the CCT15551

The datasheet function list is shown below, together with the function row that groups pulse programming, random function and external override input.

• External input for override
• Code lock function
• Holiday schedules
• Automatic winter/summer time changeover
• On/off switching times
• Pulse programming
• Cycle programming
• Switch preselection

A pulse program produces a short output at a set time, useful for bells or dosing pulses; a cycle program repeats on-off periods; and the random function varies switching times to simulate presence. Programs can be backed up with the memory stick listed under available equipment, and time and program are saved for 10 years time and program saving.

CCT15551 in the IHP and IC Astro range

The programmable models from this lane compared on datasheet values:

Loads and contact rating of the CCT15551

The contact is rated 10 A – 250 V AC pf = 0.6 and 16 A – 250 V AC pf = 1 with a minimum of 10 mA 230 V AC and 100 mA 24 V AC/DC. Lamp-load limits from the datasheet:

• incandescent lamp: 2600 W
• halogen lamp: 2600 W
• non-corrected fluorescent tube: 2600 VA
• serial-compensated fluorescent tube: 2600 VA
• parallel compensated fluorescent lamp: 400 VA (48 µF)
• compact fluorescent lamp: 400 W
• < 2 W LED lamp: 25 W
• ≥ 2 W LED lamp: 200 W

Heavier or inductive loads should be switched through a contactor, with the timer driving the coil.

Inrush current at switch-on, particularly with LED drivers and electronic ballasts, can exceed the steady rating for a few milliseconds. The lamp-load limits above already account for typical inrush, but groups of many drivers on one contact should be split or switched through a contactor.

Selection checklist for the CCT15551

• Supply: 230 V AC +10 % -15 % at 50/60 Hz.
• Channels needed: 1.
• Control logic: weekly clock schedule.
• Load: inside the load table or through a contactor.
• Temperature: -30–55 °C operating range.
• Options: override input, memory stick, languages.

Installation and commissioning of the CCT15551

Mount this unit on TH35 rail, wire the supply and load with the 0.5 to 2.5 mm² screw terminals described on the datasheet, then set language, date, time and schedules through the four push-buttons. The unit is Class II, IP20 and overvoltage category 3, so it belongs in a closed board.

After programming, test each output by manual operation, then watch the first scheduled switchings. A code lock function is listed to prevent changes by unauthorised persons, which is worth enabling on shared boards.

Before energising, confirm that the supply on the board matches 230 V AC +10 % -15 % at 50/60 Hz and that the load circuit has its own protective device, since the timer contact is not a short-circuit protection element. Keep control wiring tidy and clear of power cables so the unit’s push-buttons and display remain accessible for later changes, and label the output so maintenance staff know which circuit it controls.

Where the CCT15551 is used in Oman and the GCC

Typical jobs are street, facade, landscape and car-park lighting, mosque and compound lighting, and signage that should follow a daily or weekly routine. In hot and dusty switchrooms keep the board within the -30–55 °C range on the datasheet and avoid direct sun on the enclosure.

In practice many Gulf sites run lighting on a fixed evening-to-dawn pattern all year, and shift pumps, fans or irrigation by season. Document each programmed schedule on a label inside the board door, because a replaced timer comes up blank and the schedule has to be re-entered from the record.

Documents and quotation

The official Schneider Electric datasheet of this unit is attached on this page for download, so every figure above can be checked against the source.

To request a quotation, send us the part number CCT15551, the quantity and the delivery location through the RFQ form. Seven Star LLC replies with availability and lead time.