SIEMENS 6ES7521-1BL00-0AB0 SIMATIC S7-1500 Digital Input Module

Input voltage

• Rated value (DC)

24 V

• for signal "0"

-30 to +5 V

• for signal "1"

+11 to +30V

Input current

• for signal "1", typ.

2.5 mA

Input delay (for rated value of input voltage)

for standard inputs

—parameterizable

Yes; 0.05 / 0.1 / 0.4 / 1.6 / 3.2 / 12.8 / 20 ms

—at "0" to "1", min.

0.05 ms

—at "0" to "1", max.

20 ms

—at "1" to "0", min.

0.05 ms

—at "1" to "0", max.

20 ms

for interrupt inputs

—parameterizable

Yes

for technological functions

—parameterizable

Yes

Cable length

• shielded, max.

1 000 m

• unshielded, max.

600 m

Encoder

Connectable encoders

• 2-wire sensor

Yes

—permissible quiescent current (2-wire sensor),

1.5 mA

max.

Isochronous mode

Filtering and processing time (TCI), min.

80 卩s; At 50 卩s filter time

Bus cycle time (TDP), min.

250 卩s

Interrupts/diagnostics/status information

Diagnostics function

Yes

Alarms

• Diagnostic alarm

Yes

• Hardware interrupt

Yes

Diagnoses

• Monitoring the supply voltage

Yes

• Wire-break

Yes; to I < 350 卩A

• Short-circuit

No

Diagnostics indication LED

• RUN LED

Yes; green LED

• ERROR LED

Yes; red LED

• Monitoring of the supply voltage (PWR-LED)

Yes; green LED

• Channel status display

Yes; green LED

• for channel diagnostics

Yes; red LED

• for module diagnostics

Yes; red LED

Potential separation

Potential separation channels

• between the channels

Yes

• between the channels, in groups of

16

• between the channels and backplane bus

Yes

• between the channels and the power supply of the

No

electronics

Isolation

Isolation tested with

707 V DC (type test)

Standards, approvals, certificates

Suitable for safety functions

No