CPU processing times

for bit operations, typ.

0.08 µs; / instruction

for word operations, typ.

1.7 µs; / instruction

for floating point arithmetic, typ.

2.3 µs; / instruction

CPU-blocks

Number of blocks (total)

DBs, FCs, FBs, counters and timers. The maximum number of

addressable blocks ranges from 1 to 65535. There is no restriction, the

entire working memory can be used

OB

● Number, max.

Limited only by RAM for code

Data areas and their retentivity

Retentive data area (incl. timers, counters, flags), max.

14 kbyte

Flag

● Size, max.

8 kbyte; Size of bit memory address area

Local data

● per priority class, max.

16 kbyte; Priority class 1 (program cycle): 16 KB, priority class 2 to 26: 6

KB

Address area

Process image

● Inputs, adjustable

1 kbyte

● Outputs, adjustable

1 kbyte

Hardware configuration

Number of modules per system, max.

3 comm. modules, 1 signal board, 8 signal modules

Time of day

Clock

● Hardware clock (real-time)

Yes

● Backup time

480 h; Typical

● Deviation per day, max.

±60 s/month at 25 °C

Digital inputs

Number of digital inputs

14; Integrated

● of which inputs usable for technological functions

6; HSC (High Speed Counting)

Source/sink input

Yes

Number of simultaneously controllable inputs

all mounting positions

— up to 40 °C, max.

14

Input voltage

● Rated value (DC)

24 V

● for signal "0"

5 V DC at 1 mA

● for signal "1"

15 V DC at 2.5 mA

Input delay (for rated value of input voltage)

for standard inputs

— parameterizable

0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable

in groups of four

— at "0" to "1", min.

0.2 ms

— at "0" to "1", max.

12.8 ms

for interrupt inputs

— parameterizable

Yes

for technological functions

— parameterizable

Single phase: 3 @ 100 kHz & 3 @ 30 kHz, differential: 3 @ 80 kHz & 3

@ 30 kHz

Cable length

● shielded, max.

500 m; 50 m for technological functions

● unshielded, max.

300 m; for technological functions: No

Digital outputs

Number of digital outputs

10

● of which high-speed outputs

4; 100 kHz Pulse Train Output

Limitation of inductive shutdown voltage to

L+ (-48 V)

Switching capacity of the outputs

● with resistive load, max.

0.5 A

● on lamp load, max.

5 W

6ES72141AG400XB0

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7/7/2022

Subject to change without notice

© Copyright Siemens