LA 724i силовой модуль - LA 724 силовые модули

The LA 724 is the universal power output module with a maximum power of 1000 W per channel with 24 channels.

Дизайн

Connection of heat emitter via front plug
Channel fuses at front
Heat dissipation possible using optional LM 724 fan module

Функции

Output power

24 power channels with 230 V (8 outputs each per phase)
Max. 1000 W switching capacity per output
Max. 7360 W switching capacity per phase
Power triacs with zero crossover switching
Protection of triacs and opto-triacs against overvoltages by Transil diodes

Forced ventilation

Depending on the switching capacity and ambient temperature, the power output may have to be forced ventilated. An LM 724 fan module is available as an optional accessory.
Detailed information is available in the manual.

Temperature monitoring

An NTC thermistor is present on the heat sink to monitor its temperature. This temperature-dependent resistor outputs a signal to the S7-300 at 92 °C ± 3 °C. A second switching threshold at 100 °C ± 3 °C switches off the power outputs of the module.

Fuses

Each channel of the LA 724i has an externally-accessible 5-A fuse to protect the power triac and a 32-A fuse per phase to limit the phase current.

Diagnostics facilities

Diagnostics functions are provided as standard to detect the following faults:

Internal fuse blown or triac at high-resistance
Triac failed
External fault such as blown fuse, heat emitter or cable breakage

If several heat emitters are connected to one output in parallel, failure of an individual heat emitter is detected by extended diagnostics.

Технические данные

LA 724i power output module
Outputs per power output (LA 724i)	24
Electrical isolation from control unit	By opto-triac and optocoupler specified according to VDE 0884
Insulation voltage
Opto-triac	5 kV
Optocoupler	5.3 kV
Electrical isolation between power outputs	No
Load voltage (for star connection)
Rated value	230 V AC
Permissible range	187 V ... 264 V (TN system)
Frequency	50 Hz/60 Hz (47 Hz ... 63 Hz)
Total current per phase and module	Max. 32 A
Current per busbar	Max. 120 A
Output voltage	Full waves or half-waves switched at zero crossover
Output current
Maximum value	5 A
Residual current	Max. 7 mA
Power loss	Typ. P_V = 0.7 W/A x I + 0.18 W/A² x I² (I = control current in the channel)
Switching capacity (simultaneity 100 %)	Max. 1000 W per channel at 230 V Note: the total current per phase of 32 A must not be exceeded. Min. 75 W per channel
Parallel connection of heat emitters to one channel
Quantity	Typ. 5
Minimum power per radiator	200 W
Total switching capacity per LA 724i (ambient temperature = 40 °C)
Without forced ventilation	14.4 kW
With forced ventilation	22 kW
Type of load	Resistive loads with max. 15 times the cold current in the 1st half-wave (if necessary, flash heat emitters can be measured at Siemens)
Overload	5 times the rated current for 20 ms
Thermal protection	Yes, by NTC thermistor 92 °C ± 3 °C: warning to host controller via PROFIBUS DP 100 °C ± 3 °C: switching off of power outputs
Short-circuit protection	One 5 A/250 V quick-blow fuse per output
Overvoltage protection	By Transil diodes
Connection line	R _max = 14 W (short-circuit protection is thus ensured)
Dimensions of LA 724 (W x H x D)	50 mm x 480 mm x 210 mm
Weight, approx.	5.3 kg

Дополнительно

Order No.	Description
6ES7 171 ‑ 3AA00 ‑ 0AA0	Fan module for HS 724 Required with powers greater than 650 Watt per channel on LA 724 (for 2 power outputs)
Part No. 40018384	Phönix male connector, screw-type (3 units required per LA)
6ES7 171 ‑ 2XX00 ‑ 6DA0	Heater controller busbar
Part No. 41760372	5 A fuse; fast-blow

Дальнейшая информация

Ordering location
New parts and accessories	Siemens AG A&D SE FTH	Org-ID 10001539
Repairs	Siemens AG A&D SE EWF RC Fürth	Org-ID AV000085
Returned items	Siemens AG A&D RC Service	Org-ID A4025956

Заказные данные

Заказной №	Описание	Вес (кг)	Доставка	Мин. зак. (шт)
6BK1700-2BA00-0AA0	LA 724I УПРАВЛЕНИЕ НАГРЕВОМ СИЛОВОЙ ВЫХОД НА ЦЕНТР. СХ. ZA 724I СТАНДАРТНАЯ ВЕРСИЯ	5.6	6 - 8 недель (C)	1

Аксессуары

Заказной №	Описание	Вес (кг)	Доставка	Мин. зак. (шт)
6ES7171-2XX00-6DA0	УПРАВЛЕНИЕ НАГРЕВОМ-ТОКОВЫЕ ШИНЫ КАК ЗАП. ЧАСТЬ	0.022	6 - 8 недель (C)	1
6ES7171-3AA00-0AA0	МОДУЛЬ ВЕНТИЛЯТОРА ДЛЯ HS 724, ТРЕБУЕТСЯ ПРИ МОЩНОСТЯХ БОЛЬШЕ 1000 ВАТТ НА КАНАЛ НА LA724	0.82	по запросу (D)	1