Technical Specifications

Product / order number
6ES7521-1BH10-0AA0
Module type
SM 521 Basic digital input module
Supported CPU / system
SIMATIC S7-1500 / ET 200MP
Supply voltage
24 V DC
Integrated / available I/O
16 DI
Input / output signal type
24 V DC, IEC 61131 Type 3
Rated output current
Not applicable
Communication interface
Station backplane bus
Maximum expansion / modules
Uses 1 S7-1500/ET 200MP slot
Memory
Not applicable
Supported protocols
Cyclic I/O over the backplane bus
Diagnostics
Per-channel status LEDs and DIAG LED
Configuration software
STEP 7 in TIA Portal V13 or higher
Mounting method
S7-1500 rail; 40-pole front connector
Dimensions W × H × D
25 × 147 × 129 mm
Operating temperature / protection
IP20

Key Features

  • Exact Siemens order number 6ES7521-1BH10-0AA0; SM 521 Basic digital input module.
  • System: SIMATIC S7-1500 / ET 200MP; supply: 24 V DC.
  • I/O: 16 DI; signals: 24 V DC, IEC 61131 Type 3.
  • Output current: Not applicable; interface: Station backplane bus.
  • Expansion: Uses 1 S7-1500/ET 200MP slot; memory: Not applicable.
  • Protocols: Cyclic I/O over the backplane bus; diagnostics: Per-channel status LEDs and DIAG LED.
  • Configured with STEP 7 in TIA Portal V13 or higher; S7-1500 rail; 40-pole front connector; dimensions 25 × 147 × 129 mm.