Siemens 6ES7121-1BB00-0AA0 digital input submodule
MPN6ES7121-1BB00-0AA0
*** SPARE PART*** SIMATIC SC,ELECTRONIC SUBMODULE 2 DI, 24 V DC; 8 PIECES PER PACKAGING UNIT
$45.72Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Inputs
| Parameter | Value |
|---|---|
| Number of digital inputs | 2 |
| 2-wire sensor support | Yes |
Electrical
| Parameter | Value |
|---|---|
| Rated value (DC) | 24 V |
| Input voltage at signal "1" | 13 to 30V |
| Input voltage at signal "0" | -3 to +5V |
| Input current at signal "1" (typ.) | 7 mA |
| Power loss (typ.) | 0.4 W |
| Permissible quiescent current, 2-wire sensor, max. | 1.5 mA |
| Cable length, unshielded, max. | 600 m |
| Cable length, shielded, max. | 1 000 m |
Timing
| Parameter | Value |
|---|---|
| Input delay 0 to 1, min. | 1.2 ms |
| Input delay 1 to 0, min. | 1.2 ms |
| Input delay 0 to 1, max. | 4.8 ms |
| Input delay 1 to 0, max. | 4.8 µs |
Diagnostics & Isolation
| Parameter | Value |
|---|---|
| Diagnostics function | No |
| Isolation between channels | No |
| Isolation between channels and backplane bus | No; Optocoupler |
| Isolation test voltage | 1 500 V AC |
| Status indicator per channel (green) | Yes |
Mechanical
| Parameter | Value |
|---|---|
| Depth | 51 mm |
| Height | 64 mm |
| Width | 10 mm |
MPN
6ES7121-1BB00-0AA0