|
SM331, 8AI, 0/4-20MA HART |
| General information |
|
| Product function |
|
| ● Isochronous mode |
No |
| Supply voltage |
|
| Load voltage L+ |
|
| ● Rated value (DC) |
24 V |
| ● Reverse polarity protection |
Yes |
| Input current |
|
| from load voltage L+ (without load), max. |
20 mA |
| from backplane bus 5 V DC, max. |
120 mA |
| output voltage / header |
|
| supply voltage of the transmitters / header |
|
| ● product function / supply voltage for transmitters |
Yes |
| ● supply voltage / of the transmitters / at DC / rated value |
24 V |
| ● product feature / of the supply voltage for transmitters / short-circuit proof |
Yes |
| ● supply current / from supply voltage for transmitter / maximum |
60 mA |
| Power loss |
|
| Power loss, typ. |
1.5 W |
| Analog inputs |
|
| Number of analog inputs |
8 |
| permissible input current for current input (destruction limit), max. |
40 mA |
| Input ranges (rated values), currents |
|
| ● 0 to 20 mA |
Yes |
| — Input resistance (0 to 20 mA) |
140 Ω |
| ● -20 mA to +20 mA |
|
| — Input resistance (-20 mA to +20 mA) |
140 Ω |
| ● 4 mA to 20 mA |
|
| — Input resistance (4 mA to 20 mA) |
140 Ω |
| Cable length |
|
| ● shielded, max. |
800 m |
| Analog value generation for the inputs |
|
| Measurement principle |
Sigma Delta |
| Integration and conversion time/resolution per channel |
|
| ● Resolution with overrange (bit including sign), max. |
16 bit |
| ● Integration time, parameterizable |
Yes |
| ● Integration time (ms) |
20 ms at 50 Hz; 16.6 ms at 60 Hz; 100 ms at 100 Hz |
| ● Basic conversion time, including integration time (ms) |
55 ms @ 60 Hz, 65 ms @ 50 Hz, 305 ms @ 100 Hz |
| ● Interference voltage suppression for interference frequency f1 in Hz |
10 / 50 / 60 Hz |
| Smoothing of measured values |
|
| ● parameterizable |
Yes |
| ● Step: None |
Yes |
| ● Step: low |
Yes |
| ● Step: Medium |
Yes |
| ● Step: High |
Yes |
| Encoder |
|
| Connection of signal encoders |
|
| ● for current measurement as 2-wire transducer |
Yes |
| ● for current measurement as 4-wire transducer |
Yes |
| Errors/accuracies |
|
| Operational error limit in overall temperature range |
|
| ● Current, relative to input range, (+/-) |
0.15 % |
| Basic error limit (operational limit at 25 °C) |
|
| ● Current, relative to input range, (+/-) |
0.1 % |
| Interrupts/diagnostics/status information |
|
| Diagnostics function |
Yes |
| Alarms |
|
| ● Diagnostic alarm |
Yes |
| ● Limit value alarm |
Yes |
| Diagnostics indication LED |
|
| ● Group error SF (red) |
Yes |
| ● Channel fault indicator F (red) |
Yes |
| Potential separation |
|
| Potential separation analog inputs |
|
| ● between the channels |
No |
| ● between the channels and backplane bus |
Yes |
| Isolation |
|
| Isolation tested with |
500 V DC |
| Degree and class of protection |
|
| IP degree of protection |
IP20 |
| connection method / header |
|
| required front connector |
20-pin |
| Dimensions |
|
| Width |
40 mm |
| Height |
125 mm |
| Depth |
117 mm |
| Weights |
|
| Weight, approx. |
205 g |
