General information:

• Product type designation: CPU 1518-4 PN/DP.
• based on: 6ES7518-4AP00-0AB0.
• Product function:
• Isochronous mode: Yes.

Display:

• Screen diagonal [cm]: 6.1 cm.

Control elements:

• Number of keys: 6.
• Mode selector switch: 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.

Input current:

• Current consumption (rated value): 1.55 A.
• Inrush current, max.: 2.4 A; Rated value.
• I²t: 0.45 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:

• SIMATIC memory card required: Yes.
• Work memory:
• integrated (for program): 4 Mbyte.
• integrated (for data): 20 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 blocks (total): 10 000.
• DB:
• Number, max.: 10 000; Number range: 1 to 65535.
• Size, max.: 10 Mbyte.
• FB:
• Number, max.: 9 998; Number range: 1 to 65535.
• Size, max.: 512 kbyte.
• FC:
• Number, max.: 9 999; Number range: 1 to 65535.
• Size, max.: 512 kbyte.
• OB:
• Size, max.: 512 kbyte.
• Number of free cycle OBs: 100.
• Number of time alarm OBs: 20.
• Number of delay alarm OBs: 20.
• Number of cyclic interrupt OBs: 20.
• Number of process alarm OBs: 50.
• Number of DPV1 alarm OBs: 3.
• Number of isochronous mode OBs: 2.
• 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.

Dimensions:

• Width: 175 mm.
• Height: 147 mm.
• Depth: 129 mm.

Weights:

• Weight, approx.: 1 988 g.