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| Article number | 6ES7321-7BH01-0AB0 | 6ES7321-1CH00-0AA0 | 6ES7321-1CH20-0AA0 | 6ES7321-1FH00-0AA0 |
| SM321, 16DI, 24V DC | SM321, 16 DI, AC/DC 24-48V, 1ch/common | SM321, 16DI, DC48-125V | SM321, 16 DI, 120/230V AC | |
| Supply voltage | ||||
| Load voltage L+ | ||||
|
● Rated value (DC)
|
24 V | 24 V | 48 V | |
|
● permissible range, lower limit (DC)
|
20.4 V | 24 V | 48 V | |
|
● permissible range, upper limit (DC)
|
28.8 V | 48 V | 125 V | |
|
● Reverse polarity protection
|
Yes | |||
| Load voltage L1 | ||||
|
● Rated value (AC)
|
24 V | 230 V; 120/230 V AC; all load voltages must have the same phase. | ||
|
● permissible range, lower limit (AC)
|
24 V | |||
|
● permissible range, upper limit (AC)
|
48 V | |||
| Input current | ||||
| from load voltage L+ (without load), max. | 90 mA | |||
| from backplane bus 5 V DC, max. | 130 mA | 100 mA | 40 mA | 29 mA |
| Encoder supply | ||||
| Number of outputs | 2 | |||
| Type of output voltage | L+ (-2.5 V) | |||
| Short-circuit protection | Yes; Electronic | |||
| additional (redundant) feed | Yes | |||
| Output current | ||||
|
● Rated value
|
120 mA | |||
|
● permissible range, lower limit
|
0 mA | |||
|
● permissible range, upper limit
|
150 mA | |||
| Power loss | ||||
| Power loss, typ. | 4 W | 1.5 W; at 24 V; 2,8 W at 48 V | 4.3 W | 4.9 W |
| Digital inputs | ||||
| Number of digital inputs | 16 | 16 | 16 | 16 |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes | Yes | Yes | |
| Input characteristic curve in accordance with IEC 61131, type 2 | Yes | |||
| horizontal installation | ||||
|
— up to 40 °C, max.
|
16 | 16 | 8 | 16 |
|
— up to 60 °C, max.
|
16 | 16 | 8; 6 to Ue 146 V | 16 |
| vertical installation | ||||
|
— up to 40 °C, max.
|
16 | 16 | 8 | 16 |
| Input voltage | ||||
|
● Type of input voltage
|
DC | AC/DC | DC | AC |
|
● Rated value (DC)
|
24 V | 24 V; DC 24 or 48 V | 48 V; 48 V DC to 125 V DC | |
|
● Rated value (AC)
|
24 V; 24 V AC or 48 V AC (0 … 63 Hz) | 230 V; 120/230 V AC (47 … 63 Hz) | ||
|
● for signal “0”
|
-30 to +5 V | -5V AC to +5V AC | -146 V DC to +15 V DC | 0 to 40V |
|
● for signal “1”
|
13 to 30V | 14V AC to 60V AC | 30 V DC to 146 V DC | 79 to 264V |
| Input current | ||||
|
● for signal “0”, min.
|
-1 mA | |||
|
● for signal “0”, max. (permissible quiescent current)
|
1 mA | |||
|
● for signal “1”, typ.
|
7 mA | 2.7 mA | 3.5 mA | 6.5 mA; (120 V, 60 Hz), 16 mA (230 V, 50 Hz) |
| Input delay (for rated value of input voltage) | ||||
| for standard inputs | ||||
|
— parameterizable
|
Yes; 0.1 / 0.5 / 3 / 15 / 20 ms | No | No | No |
|
— at “0” to “1”, min.
|
16 ms | 0.1 ms | 25 ms | |
|
— at “0” to “1”, max.
|
16 ms | 3.5 ms | 25 ms | |
|
— at “1” to “0”, min.
|
0.7 ms | |||
|
— at “1” to “0”, max.
|
16 ms | 3 ms | 25 ms | |
| Encoder connection | ||||
|
● Fixed current limitation for wire-break monitoring, min.
|
10 kΩ | |||
|
● Fixed current limitation for wire-break monitoring, max.
|
18 kΩ | |||
| Cable length | ||||
|
● shielded, max.
|
1 000 m | 1 000 m | 1 000 m | 1 000 m |
|
● unshielded, max.
|
600 m | 600 m | 600 m | 600 m |
| Encoder | ||||
| Connectable encoders | ||||
|
● 2-wire sensor
|
Yes | Yes | Yes | Yes |
|
— permissible quiescent current (2-wire sensor), max.
|
2 mA | 1 mA | 1 mA | 2 mA |
| Interrupts/diagnostics/status information | ||||
| Alarms | Yes | No | No | No |
| Diagnostics function | Yes; Parameterizable | No | No | No |
| Alarms | ||||
|
● Diagnostic alarm
|
Yes; Parameterizable | No | No | No |
|
● Hardware interrupt
|
Yes; Parameterizable | No | No | No |
| Diagnoses | ||||
|
● Diagnostic information readable
|
Yes | |||
|
● Wire-break
|
Yes; to I< 1 mA | |||
| Diagnostics indication LED | ||||
|
● Group error SF (red)
|
Yes | No | No | No |
|
● Status indicator digital input (green)
|
Yes | Yes | Yes | Yes |
|
● Encoder supply Vs (green)
|
Yes | |||
| Potential separation | ||||
| Potential separation digital inputs | ||||
|
● between the channels
|
No | Yes | No | No |
|
● between the channels, in groups of
|
16 | 1 | 8 | 4 |
|
● between the channels and backplane bus
|
Yes; Optocoupler | Yes; Optocoupler | Yes; Optocoupler | Yes; Optocoupler |
| Isolation | ||||
| Isolation tested with | 500 V DC | 1 500 V AC | 1 500 V DC | 4 000 V DC |
| Connection method | ||||
| required front connector | 20-pin | 40-pin | 20-pin | 20-pin |
| Dimensions | ||||
| Width | 40 mm | 40 mm | 40 mm | 40 mm |
| Height | 125 mm | 125 mm | 125 mm | 125 mm |
| Depth | 120 mm | 120 mm | 120 mm | 120 mm |
| Weights | ||||
| Weight, approx. | 200 g | 260 g | 200 g | 240 g |
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