ENG_3505.XML
S7-300/ET 200M requires a supply voltage of 24 V DC.
The SITOP power load current supplies convert the line voltage (120/230 V AC, 24 to 110 V DC) into the 24 V DC operating voltage.
They allow use of the line voltage to supply the S7-300/ET 200M as well as sensors and actuators.
ENG_3509.XML
Load power supplies are mounted on the DIN rail immediately to the left of the CPU/IM 361/IM 153 (Slot 1).
The connection to the CPU/IM 361/IM 153 is made via a power connector included in the scope of supply.
Located on the front panel of the modules are:
- Output voltage indicator:
An LED displays the 24 V DC output voltage.
- Line voltage selector switch:
A switch with a protective cover allows you to select a line input voltage of either 120 V AC or 230 V AC.
- On/off switch for 24 V DC output voltage;
Also on the front panel, protected by a cover, are:
- Terminals:
These terminals can be used to connect cables for the network input voltages, the output voltage and the grounding conductor.
The load power supplies can also be mounted on a 35 mm standard rail (EN 50 022), for which the following mounting adapters are required:
- 1 adapter each for PS 307-1B, PS 307-1E
- 2 adapters for PS 307-1K