Article number | 6ES7321-7RD00-0AB0 |
| SM321, 4DI, DC24V, HAZARDOUS AREAS |
Supply voltage |
|
Load voltage L+ |
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● Rated value (DC) | 24 V |
● Reverse polarity protection | Yes |
Input current |
|
from load voltage L+ (without load), max. | 50 mA |
from backplane bus 5 V DC, max. | 80 mA |
Encoder supply |
|
Type of output voltage | via the inputs |
Power loss |
|
Power loss, typ. | 1.1 W |
Digital inputs |
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Number of digital inputs | 4 |
Number of NAMUR inputs | 4 |
Input voltage |
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● Type of input voltage | DC |
● Rated value (DC) | 8.2 V; from internal power circuit supply |
Input current |
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● on wire-break, max. | 0.1 mA |
● on short-circuit, max. | 8.5 mA |
for NAMUR encoders |
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— for signal “0” | 0.35 to 1.2 mA |
— for signal “1” | 2.1 to 7 mA |
Input delay (for rated value of input voltage) |
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● Input frequency (with a time delay of 0.1 ms), max. | 2 kHz |
for NAMUR inputs |
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— parameterizable | Yes; 0.1 / 0.5 / 3 / 15 / 20 ms (plus 0.25 ms preparation time) |
Cable length |
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● unshielded, max. | 200 m |
Encoder |
|
Connectable encoders |
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● NAMUR encoder | Yes; Two-wire connection |
Interrupts/diagnostics/status information |
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Diagnostics function | Yes |
Diagnoses |
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● Diagnostic information readable | Yes |
Diagnostics indication LED |
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● Group error SF (red) | Yes |
● Status indicator digital input (green) | Yes |
● Channel fault indicator F (red) | Yes |
Ex(i) characteristics |
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Module for Ex(i) protection | Yes |
Maximum values of input circuits (per channel) |
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● Co (permissible external capacity), max. | 3 µF |
● Io (short-circuit current), max. | 14.1 mA |
● Lo (permissible external inductivity), max. | 100 mH |
● Po (power of load), max. | 33.7 mW |
● Uo (output no-load voltage), max. | 10 V |
Potential separation |
|
Potential separation digital inputs |
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● between the channels | Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
● between the channels, in groups of | 1 |
● between the channels and backplane bus | Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
● Between the channels and load voltage L+ | Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
Standards, approvals, certificates |
|
Use in hazardous areas |
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● Type of protection acc. to EN 50020 (CENELEC) | [EEx ib] IIC |
● Type of protection acc. to FM | Class II, Division 2, Group A, B, C, D T4 |
● Test number PTB | Ex-96.D.2094X |
Ambient conditions |
|
Ambient temperature during operation |
|
● max. | 60 °C |
Connection method |
|
required front connector | 20-pin |
Dimensions |
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Width | 40 mm |
Height | 125 mm |
Depth | 120 mm |
Weights |
|
Weight, approx. | 230 g |
