SIMATIC S7-400 – SM 421 Digital Input Modules – Siemens
USD $ 262.65 – USD $ 614.50
SKU: N/A
Digital input modules can be used to connect the control to digital process signals. They are suitable for connecting standard switches and two-wire proximity switches (BERO).
Siemens Digital Input Modules SIMATIC S7-400 Product Specifications:
| Article number | 6ES7421-7BH01-0AB0 | 6ES7421-1BL01-0AA0 | 6ES7421-1EL00-0AA0 | 6ES7421-1FH20-0AA0 | 6ES7421-7DH00-0AB0 |
| SM421, 16DI, DC24V, 0.05MS INPUT DELAY | SM421, 32DI, DC24V | SM421, 32DI, DC/AC 120V | SIMATIC S7-400, DIG.INPUT MOD. | SIMATIC S7-400, SM 421 | |
| Supply voltage | |||||
| Load voltage L+ | |||||
| ● Rated value (DC) | 24 V | ||||
| ● permissible range, lower limit (DC) | 20.4 V | ||||
| ● permissible range, upper limit (DC) | 28.8 V | ||||
| Input current | |||||
| from supply voltage L+, max. | 120 mA | ||||
| from backplane bus 5 V DC, max. | 130 mA | 20 mA | 200 mA | 80 mA | 150 mA |
| Encoder supply | |||||
| Number of outputs | 2 | ||||
| Type of output voltage | L+ (-2.5 V) | ||||
| Short-circuit protection | Yes; Electronic | ||||
| additional (redundant) feed | Yes; possible | ||||
| Output current | |||||
| ● Rated value | 120 mA | ||||
| ● permissible range, lower limit | 0 mA | ||||
| ● permissible range, upper limit | 150 mA | ||||
| Power loss | |||||
| Power loss, typ. | 5 W | 6 W | 6.5 W | 12 W | 8 W; 3.5 W (24 V DC); 6.5 W (48 V DC); 8.0 W (60 V DC) |
| Digital inputs | |||||
| Number of digital inputs | 16 | 32 | 32 | 16 | 16 |
| Number of simultaneously controllable inputs | |||||
| ● Number of simultaneously controllable inputs | 16 | 32 | 32 | 16 | 16 |
| Input voltage | |||||
| ● Type of input voltage | DC | DC | AC/DC | AC/DC | AC/DC |
| ● Rated value (DC) | 24 V | 24 V | |||
| ● Rated value (UC) | 120 V; 47 … 63 Hz | 230 V; 120/230 V UC (47 … 63 Hz) | 24 V; 24 V UC to 60 V UC (47 … 63 Hz) | ||
| ● for signal “0” | -30 V DC to +5 V DC | -30 V DC to +5 V DC | 0 to 20 V UC | 0 to 40 V AC/ -40 to +40 V DC | -6 to +6 V DC/ 0 to 5 V AC |
| ● for signal “1” | 11 V DC to 30 V DC | 13 V DC to 30 V DC | 79 to 132 V AC; 80 to 132 V DC | 74 to 264 V AC; 80 to 264 V DC, -80 to -264 V | 15 to 72 V DC; -15 to -72 V DC; 15 to 60 V AC |
| Input current | |||||
| ● for signal “0”, min. | 6 mA; < 6 mA | 0 mA | 0 mA; AC: 0 mA; DC: 0 mA | ||
| ● for signal “0”, max. (permissible quiescent current) | 1.3 mA | 1 mA | 6 mA; AC: 6 mA; DC: 2 mA | ||
| ● for signal “1”, typ. | 6 mA; 6 to 8 mA | 7 mA | 2 mA; 2 to 5 mA | 10 mA; at 120 V: 10 mA AC, 1.8 mA DC; at 230 V: 14 mA AC, 2 mA DC | 4 mA; 4 to 10 mA |
| Input delay (for rated value of input voltage) | |||||
| for standard inputs | |||||
| — parameterizable | Yes | Yes | |||
| — Rated value | 0.5 ms; 0.5 / 3 / 10 / 20 ms | ||||
| — at “0” to “1”, min. | 3 µs; 0.05 / 0.1 / 0.5 / 3 ms | 1.2 ms | 5 ms | ||
| — at “0” to “1”, max. | 4.8 ms | 25 ms; 10 / 20 ms | 20 ms; AC: 20 ms; DC: 15 ms | ||
| — at “1” to “0”, min. | 1.2 ms | 5 ms | |||
| — at “1” to “0”, max. | 4.8 ms | 25 µs | 30 ms; AC: 30 ms; DC: 25 ms | ||
| Encoder connection | |||||
| ● Fixed current limitation for wire-break monitoring, min. | 10 kΩ | 18 kΩ; 18 kohms: Rated voltage 24 V (15 to 35 V); 39 kohms: Rated voltage 48 V (30 to 60 V) | |||
| ● Fixed current limitation for wire-break monitoring, max. | 18 kΩ | 56 kΩ; Rated voltage 60 V (50 to 72 V) | |||
| Cable length | |||||
| ● shielded, max. | 1 000 m; 1 000 m: 3 ms, 70 m: 0.5 ms, 30 m: 0.1 ms, 30 m: 0.05 ms | 1 000 m | 1 000 m | 1 000 m | 1 000 m |
| ● unshielded, max. | 600 m; 600 m: 3 ms; 50 m: 0,5 ms; 20 m: 0,1 ms; 20 m: 0,05 ms | 600 m | 600 m | 600 m | 600 m; 600 m: 3, 10, 20 ms; 100 m: 0,5 ms |
| Encoder | |||||
| Connectable encoders | |||||
| ● 2-wire sensor | Yes | Yes | Yes | Yes | Yes |
| — permissible quiescent current (2-wire sensor), max. | 3 mA | 1.5 mA | 1 mA | 5 mA; AC: 5 mA | 0.5 mA; 0.5 to 2 mA |
| Interrupts/diagnostics/status information | |||||
| Diagnostics function | Yes; Parameterizable | No | No | Yes; Parameterizable | |
| Alarms | |||||
| ● Diagnostic alarm | Yes; Parameterizable | Yes; Parameterizable | |||
| ● Hardware interrupt | Yes; Parameterizable | Yes; Parameterizable | |||
| Diagnoses | |||||
| ● Diagnostic information readable | Yes | Yes; possible | |||
| ● Monitoring the supply voltage | Yes | ||||
| ● Wire-break | Yes; I < 1 mA | Yes; I> 0.7 mA | |||
| Diagnostics indication LED | |||||
| ● Rated load voltage PWR (green) | Yes; Per group | ||||
| ● internal fault INTF (red) | Yes | ||||
| ● external fault EXTF (red) | Yes | ||||
| ● Status indicator digital input (green) | Yes | Yes | Yes | Yes | Yes |
| ● Channel fault indicator F (red) | No | No | |||
| Potential separation | |||||
| Potential separation digital inputs | |||||
| ● between the channels | Yes | No | Yes | Yes | Yes |
| ● between the channels, in groups of | 8 | 32 | 8 | 4 | 1 |
| ● between the channels and backplane bus | Yes | Yes | Yes | Yes | Yes |
| Isolation | |||||
| Isolation tested with | 500 V DC | 500 V DC | 1 500 V AC | 1 500 V AC | 1 500 V AC |
| Dimensions | |||||
| Width | 25 mm | 25 mm | 25 mm | 25 mm | 25 mm |
| Height | 290 mm | 290 mm | 290 mm | 290 mm | 290 mm |
| Depth | 210 mm | 210 mm | 210 mm | 210 mm | 210 mm |
| Weights | |||||
| Weight, approx. | 600 g | 600 g | 650 g | 600 g |
| Weight | N/A |
|---|---|
| Dimensions | N/A |
