The LA724I HP power output module is a 12-channel power output module with a maximum output of
LA724I HP power output module | |
Outputs per power output module | 12 |
Galvanic isolation from control unit | By means of opto-triac and optocoupler specified according to EN 60747-5-2 |
Insulation voltage | |
| 5 kV |
| 5.3 kV |
Galvanic isolation of power outputs from each other | no |
Load voltage (for star and delta circuit configuration) | |
| 230/400 V AC |
| 187 ... 264 V, 340 ... 460 V AC (TN system) |
| 50/60 Hz (47 ... 63 Hz) |
Max. total current per phase and module | 40 A |
Current per busbar, max. | 120 A |
Output voltage | Full or half-waves switched during zero crossing |
Output current | |
| 10 A (fusing is carried out with a fuse of type 16 A slow blow/500 V; the connecting cable must be dimensioned accordingly) |
| 7 mA |
Power loss | Typ. PV = 0.7 W/A x I + 0.16 W/A2 x I2 |
Switching capacity (100% simultaneity) | 2,300 W per channel at 230 V Note: The total current per phase must not exceed 40 A. Min. 75 W per channel |
Parallel connection of heat emitters to one channel | |
| 5 |
| 200 W |
Total switching capacity per LA724I HP power output module (TU = 40 °C) | |
| 13/22.6 kW (star/delta) |
| 21/36.5 kW (star/delta) |
Load type | Resistive load with a maximum of 15 times the cold current in the first half wave. (In the case of flash emitters, this can lead to a reduction of the permissible switching capacity. These emitters can be measured at Siemens.) |
Overload | 5 times the rated current for 20 ms |
Protective measures | |
| Yes (by NTC thermistor) 92 °C ± 3 °C: Alarm to higher-level controller via PROFIBUS DP 100 °C ± 3 °C: Deactivation of the power output modules |
| One 16 A/ 250 V fuse per output |
| By Transil diodes |
Connecting cable | Rmax = 14 W |
Dimensions (W x H x D) | 50 mm x 480 mm x 210 mm |
Weight, approx. | Approx. 5.3 kg |
Depending on the switching capacity and ambient temperature, the power output module may have to be forced ventilated. An LM724 fan module is available as an option for this purpose. For detailed information see Manual.
There is an NTC thermistor on the heat sink for monitoring 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.
Each channel of the LA724IHP power output module has an externally-accessible 10 A fuse to protect the power triac and a 40 A fuse per phase to limit the phase current.
Diagnostics functions are provided as standard to detect the following faults:
If several heat emitters are connected to one output in parallel, failure of an individual heat emitter is detected by means of extended diagnostics.
Design | Type |
Screw-fit mating connector (3 units required for each power output module) | 40018384 |
Fuse, 16 A slow blow/500 V | A5E01204540 |
