Control elements:

• Number of keys: 6.
• Mode buttons: 1.

Supply voltage:

• Rated value (DC): 24 V.
• permissible range, lower limit (DC): 19.2 V.
• permissible range, upper limit (DC): 28.8 V.
• Reverse polarity protection: Yes.

Mains buffering:

• Mains/voltage failure stored energy time: 5 ms.
• Repeat rate, min.: 1/s.

Input current:

• Current consumption (rated value): 1.55 A.
• Current consumption, max.: 1.9 A.
• Inrush current, max.: 1.9 A; Rated value.
• I²t: 0.4 A²·s.

Power:

• Infeed power to the backplane bus: 12 W.
• Power consumption from the backplane bus (balanced): 30 W.

Power loss:

• Power loss, typ.: 24 W.

Memory:

• Number of slots for SIMATIC memory card: 1.
• SIMATIC memory card required: Yes.

Work memory:

• integrated (for program): 6 Mbyte.
• integrated (for data): 60 Mbyte.

Load memory:

• Plug-in (SIMATIC Memory Card), max.: 32 Gbyte.

Backup:

• maintenance-free: Yes.

CPU processing times:

• for bit operations, typ.: 1 ns.
• for word operations, typ.: 2 ns.
• for fixed point arithmetic, typ.: 2 ns.
• for floating point arithmetic, typ.: 6 ns.

CPU-blocks:

• Number of elements (total): 20 000; Blocks (OB, FB, FC, DB) and UDTs.

DB:

• Number range: 1 ... 60 999; subdivided into: number range that can be used by the user: 1 ... 59 999, and number range of DBs created via SFC 86: 60 000 ... 60 999.
• Size, max.: 16 Mbyte; For DBs with absolute addressing, the max. size is 64 KB.

FB:

• Number range: 0 ... 65 535.
• Size, max.: 1 Mbyte.

FC:

• Number range: 0 ... 65 535.
• Size, max.: 1 Mbyte.

OB:

• Size, max.: 1 Mbyte.
• Number of free cycle OBs: 100.
• Number of time alarm OBs: 20.
• Number of delay alarm OBs: 20.
• Number of cyclic interrupt OBs: 20; with minimum OB 3x cycle of 100 µs.
• Number of process alarm OBs: 50.
• Number of DPV1 alarm OBs: 3.
• Number of isochronous mode OBs: 3.
• Number of technology synchronous alarm OBs: 2.
• Number of startup OBs: 100.
• Number of asynchronous error OBs: 4.
• Number of synchronous error OBs: 2.
• Number of diagnostic alarm OBs: 1.

Nesting depth:

• per priority class: 24.

Counters, timers and their retentivity:

• S7 counter:
• Number: 2 048.
• Retentivity:
• adjustable: Yes.
• IEC counter:
• Number: Any (only limited by the main memory).
• Retentivity:
• adjustable: Yes.
• S7 times:
• Number: 2 048.

Retentivity:

• adjustable: Yes.

IEC timer:

• Number: Any (only limited by the main memory).

Retentivity:

• adjustable: Yes.

Data areas and their retentivity:

• Retentive data area (incl. timers, counters, flags), max.: 768 kbyte; In total; available retentive memory for bit memories, timers, counters, DBs, and technology data (axes): 700 KB.
• Extended retentive data area (incl. timers, counters, flags), max.: 20 Mbyte; When using PS 6 0W 24/48/60 V DC HF.

Flag:

• Size, max.: 16 kbyte.
• Number of clock memories: 8; 8 clock memory bits, grouped into one clock memory byte.

Data blocks:

• Retentivity adjustable: Yes.
• Retentivity preset: No.

Local data:

• per priority class, max.: 64 kbyte; max. 16 KB per block.