6ES7421-7BH00-0AB0 - Siemens
MPN6ES7421-7BH00-0AB0
SIMATIC S7-400, DIG.INPUT MOD. SM 421, OPTIC. ISOLATED, 16 DI, 24V DC WITH 0,1 MS INPUT DELAY, ALARM, DIAGNOSTICS
$349.76 – $912.00Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
I/O
| Parameter | Value |
|---|---|
| Digital inputs | 16 |
Electrical
| Parameter | Value |
|---|---|
| Rated value (DC) | 24 V |
| Permissible range, lower limit (DC) | 20.4 V |
| Permissible range, upper limit (DC) | 28.8 V |
| For signal "1" | 11 V DC to 30 V DC |
| For signal "0" | -30 V DC to +5 V DC |
| Current for signal "1" (typ.) | 6 mA; 6 to 8 mA |
| Current consumption from backplane bus (5 V DC), max. | 130 mA |
| Isolation test voltage | 500 V DC |
| Isolation: channels to backplane bus | Yes |
| Max. cable length, shielded | 1 000 m; 1 000 m: 3 ms, 70 m: 0.5 ms, 30 m: 0.1 ms |
| Max. cable length, unshielded | 600 m; 600 m: 3 ms; 50 m: 0,5 ms; 20 m: 0,1 ms |
Performance
| Parameter | Value |
|---|---|
| Parameterizable | Yes; 0.1 / 0.5 / 3 ms |
| Diagnostic alarm | Yes |
| Diagnostics function | Yes; Parameterizable |
Mechanical
| Parameter | Value |
|---|---|
| Height | 290 mm |
| Width | 25 mm |
| Depth | 210 mm |
| Weight (approx.) | 600 g |
MPN
6ES7421-7BH00-0AB0