SIMATIC S7-1500, digital input module DI 16xNAMUR HF, 16 channels in groups of 8; for 8.2 V NAMUR encoder; sensor supply 8.2 V; input delay; parameterizable 0.05 ... 20 ms; integrated counting function up to 20 kHz pulse stretching; chatter monitoring; signal inversion diagnostics; hardware interrupts; all necessary components for shielding included in the scope of supply; front connector (screw terminals or push-in) to be ordered separately
Product Type: Industrial Automation Component
General
| Article number |
6ES7521-7TH00-0AB0 |
General information
| Product type designation |
DI 16xNAMUR HF |
| HW functional status |
from FS01 |
| Firmware version |
V1.0.0 |
| ● FW update possible |
Yes |
Product function
| ● I&M data |
Yes; I&M0 to I&M3 |
| ● Isochronous mode |
Yes |
| ● Prioritized startup |
Yes |
Engineering with
| ● STEP 7 TIA Portal configurable/integrated from version |
STEP 7 V17 or higher |
| ● STEP 7 configurable/integrated from version |
V5.5 SP3 / - |
| ● PROFIBUS from GSD version/GSD revision |
V1.0 / V5.1 |
| ● PROFINET from GSD version/GSD revision |
V2.3 / - |
Operating mode
| ● DI |
Yes |
| ● Counter |
Yes |
| ● Oversampling |
No |
| ● MSI |
Yes |
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, max. |
220 mA |
| ● for signal "1", typ. |
10 mA |
Encoder supply
| Number of outputs |
16; 2x 8.2 V DC |
| Short-circuit protection |
Yes |
NAMUR encoder supply
| ● 8.2 V |
Yes |
| ● Short-circuit protection |
Yes; Per group, electronic |
| ● Output current, max. |
100 mA; per group |
| ● Output current per module, max. |
200 mA |
Power
| Power consumption from the backplane bus |
0.6 W |
Power loss
Address space per module
| ● Inputs |
2 byte |
| ● Outputs |
0 byte |
Digital inputs
| Number of digital inputs |
16; NAMUR |
| Digital inputs, parameterizable |
Yes |
| Sourcing/sinking input |
P-reading |
| Pulse extension |
Yes; 0.05 s, 0.1 s, 0.2 s, 0.5 s, 1 s, 2 s |
| Edge evaluation |
Yes; rising edge, falling edge, edge change |
| Signal change flutter |
Yes; 2 to 32 signal changes |
| Flutter observation window |
Yes; 0.5 s, 1 s to 100 s in 1-s steps |
Number of simultaneously controllable inputs
| ● Number of simultaneously controllable inputs |
16 |
Digital input functions, parameterizable
| ● Gate start/stop |
Yes; software/hardware gate |
| ● Freely usable digital input |
Yes |
● Counter
| — Number, max. |
4; 4 counters max. 10 kHz or 2 counters max. 20 kHz + 2 counters max. 10 kHz; see manual for details |
| — Counting frequency, max. |
20 kHz; See manual for details |
| — Counting width |
32 bit |
| — Counting direction up/down |
Yes; forward / backward |
| ● Digital input with oversampling |
No |
Input voltage
for 10 k switched contact
| — for signal "0", min. |
0.35 mA |
| — for signal "0", max. |
1.2 mA |
| — for signal "1", min. |
2.1 mA |
| — for signal "1", max. |
10 mA |
for unswitched contact
| — for signal "0", max. (permissible quiescent current) |
0.35 to 1.2 mA |
| — for signal "1", typ. |
2.1 ... 10 mA |
for NAMUR encoders
| — for signal "0", min. |
0.35 mA |
| — for signal "0", max. |
1.2 mA |
| — for signal "1", min. |
2.1 mA |
| — for signal "1", max. |
10 mA |
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
for technological functions
for NAMUR inputs
| — at "0" to "1", max. |
20 ms |
| — at "1" to "0", max. |
20 ms |
Cable length
| ● shielded, max. |
200 m; 200 m for technological functions; depending on input frequency, encoder and cable quality; max. 50 m at 20 kHz |
Connectable encoders
| ● NAMUR encoder/changeover contact according to EN 60947 |
Yes; no CO contact |
| ● Single contact / changeover contact unconnected |
Yes; no CO contact |
| ● Single contact / changeover contact connected with 10 kΩ |
Yes; no CO contact |
| ● 2-wire sensor |
Yes |
| — permissible quiescent current (2-wire sensor), max. |
1.2 mA |
Isochronous mode
| Filtering and processing time (TCI), min. |
60 µs; At 50 μs filter time |
| Bus cycle time (TDP), min. |
250 µs |
Interrupts/diagnostics/status information
Alarms
| ● Diagnostic alarm |
Yes |
| ● Hardware interrupt |
Yes |
Diagnoses
| ● Monitoring the supply voltage |
Yes |
| ● Monitoring of encoder power supply |
Yes; short-circuit |
| ● Wire break |
Yes; to I < 350 µA |
| ● 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 channels
| ● between the channels |
No |
| ● between the channels, in groups of |
8 |
| ● between the channels and backplane bus |
Yes |
| ● Between the channels and load voltage L+ |
Yes |
| ● between the channels and the power supply of the electronics |
No |
Isolation
| Isolation tested with |
707 V DC (type test) |
Standards, approvals, certificates
| Siemens Eco Profile (SEP) |
Siemens EcoTech |
| Suitable for safety functions |
No |
Ecological footprint
| ● environmental product declaration |
Yes |
Global warming potential
| — global warming potential, (total) [CO2 eq] |
18.9 kg |
| — global warming potential, (during production) [CO2 eq] |
12.1 kg |
| — global warming potential, (during operation) [CO2 eq] |
7.66 kg |
| — global warming potential, (after end of life cycle) [CO2 eq] |
-1.02 kg |
Security
| signed firmware update |
No |
| safely removing data |
No |
| data integrity |
No |
Ambient temperature during operation
| ● horizontal installation, min. |
-30 °C |
| ● horizontal installation, max. |
60 °C |
| ● vertical installation, min. |
-30 °C |
| ● vertical installation, max. |
40 °C |
Altitude during operation relating to sea level
| ● Installation altitude above sea level, max. |
5 000 m; Restrictions for installation altitudes > 2 000 m, see manual |
Absolute humidity
| ● dew point, min. |
-60 °C; suitable for dry room applications |
Dimensions
| Width |
35 mm |
| Height |
147 mm |
| Depth |
129 mm |
Weights
Classifications
| Version |
Classification |
| eClass |
16 |
| eClass |
14 |
| eClass |
12 |
| eClass |
9.1 |
| eClass |
9 |
| eClass |
8 |
| eClass |
7.1 |
| eClass |
6 |
| ETIM |
10 |
| ETIM |
9 |
| ETIM |
8 |
| ETIM |
7 |
General Product Approval
| Miscellaneous |
Yes |
| EU declaration of conformity |
Yes |
| UK Declaration of Conformity |
Yes |
| UL |
Yes |
| KC |
Yes |
| RCM |
Yes |
| EAC |
Yes |
| China RoHS |
Yes |
| Manufacturer Declaration |
Yes |
For use in hazardous locations
| UL |
Yes |
| FM |
Yes |
| CCC-Ex |
Yes |
| IECEx |
Yes |
| ATEX |
Yes |
| Type Examination Certificate |
Yes |
| Miscellaneous |
Yes |
| CCC-Ex |
Yes |
Maritime application
| ABS (American Bureau of Shipping) |
Yes |
| BV (Bureau Veritas) |
Yes |
| DNV (Det Norske Veritas) |
Yes |
| LR (Lloyds Register) |
Yes |
| NK / Nippon Kaiji Kyokai |
Yes |
| RINA (Registro Italiano Navale) |
Yes |
| RMRS (Russian Maritime Register) |
Yes |
| CCS (China Classification Society) |
Yes |
| KR (Korean Register of Shipping) |
Yes |
Environment
| EPD Typ II/III (with life cylce assessment) |
Yes |
| Siemens EcoTech Profile (SEP) |
Yes |
| last modified: |
5/7/2026 |
Applications
This Industrial Automation Component is designed for industrial automation applications, offering reliable performance and compatibility with Siemens automation systems. Suitable for manufacturing, process control, and building automation environments.
