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SafetyNet analog input.
Process measurement with a dedicated diagnostic layer.
| Parameter | Specification |
|---|---|
| Analog input channels | 8 |
| Nominal input signal | 4-20 mA |
| Digital conversion input range | 0-25 mA |
| Conversion resolution | 16 bit |
| Conversion interval | 25 ms |
| Three-wire transmitter return current | 25 mA maximum |
| Configurable failsafe timeout | 400 ms-5 s |
| Diagnostic test interval | 5 s maximum |
| Measurement diagnostic discrepancy limit | Above 2%; comparison and reference checks |
| NAMUR high-high alarm setting | Above 21.0 mA |
| NAMUR low-low alarm setting | Below 3.6 mA |
| NAMUR alarm assertion delay | Input beyond threshold for more than 4 s |
| Low-alarm disable setting | 0 mA |
| High-alarm disable setting | 25 mA |
| Ambient temperature range | -40 to +70 °C |
| Transmitter wiring | 2-wire, 3-wire or 4-wire |
| HART polling command | Command 3 |
| Safety integrity capability | SIL 2 |
| Safety architecture | 1oo1D |
| Alarm thresholds | High-high, high, low and low-low |
| Alarm hysteresis | Configurable dead band |
| Input filter | Selectable filter time constant |
| Input reporting dead zone | Configured change threshold |
| FM location rating | Class I, Division 2, Groups A, B, C, D; T4 |
| ATEX equipment category | II 3 GD |
| Gas protection marking | Ex ic nA IIC T4 Gc / Ex nA nL IIC T4 Gc |
| Dust protection marking | Ex tc IIIC T100 °C |
| EMC standard | EN 61326-1:2013 |
| PLC equipment standard | EN 61131-2:2007 |
| Electrical safety standard | EN 61010-1:2010 |
HART variables are non-interfering data and must not be used for the safety function. Hazardous-area installation requires the appropriate field terminals and a suitable enclosure.
GE 8810-HI-TX-01 is a PAC8000 SafetyNet analog input module for 4-20 mA process transmitters. Its eight input channels use 16-bit conversion with a 25 ms conversion interval. The module accepts two-wire, three-wire and four-wire transmitter connections. HART communication provides access to instrument variables alongside analog measurement. Configurable filtering and alarm handling support process signal supervision. Its diagnostics help identify measurement faults within a correctly engineered SafetyNet safety system.
Compatible transmitters provide the analog process signal to the input channel.
Digital conversion is followed by the selected input filter and reporting dead zone.
The conditioned value is stored for Railbus communication; a sufficient change raises the new-data flag.
Independent circuitry checks the primary reading, while internal references test the measurement path. A discrepancy above 2% flags the channel as faulty and makes it inactive; the module and its other channels continue operating.
Use the analog measurement in a correctly engineered SafetyNet safety function. Match the transmitter connection and safety configuration to the application.
HART polling retrieves instrument information for asset-management tasks. This information is non-interfering and cannot be used as safety-application data.
Compared with a standard analog input with HART, the SafetyNet module adds safety-oriented diagnostics and a 1oo1D architecture suitable for SIL 2 functions. The additional checks support safety-related signal supervision.
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