The Emerson 8202-HO-IS serves as a high-performance analog output interface within the PAC8000 modular I/O family. This module provides eight intrinsically safe 4–20 mA channels specifically designed to drive field devices such as I/P converters, actuators, and valves located in Zone 1/Division 1 hazardous areas. By integrating HART® pass-through capability, the 8202-HO-IS enables advanced digital diagnostics and device status reporting directly through the analog loop. We offer this module as 100% Brand New original equipment, ensuring full compliance with ATEX, IECEx, and North American safety standards for critical process control.
| Feature | Details |
| Manufacturer | Emerson (PAC8000 / MTL / GE) |
| Model Number | 8202-HO-IS |
| Number of Channels | 8 Single-ended Analog Outputs |
| Signal Range | 4–20 mA nominal (Full range: 1–22 mA) |
| Resolution | 12-bit |
| Accuracy (@ 25 °C) | ±20 μA |
| Load Resistance | 0–650 Ω Maximum |
| Drive Voltage | ≥13 V at 20 mA |
| HART® Support | HART Pass-through (variables & status) |
| Isolation | 60 V AC (Channel to Railbus) |
| Operating Temp | -40 °C to +70 °C |
| Safety Rating | Intrinsically Safe (ATEX/IECEx/UL/CSA) |
Direct Hazardous Area Control: The intrinsically safe circuitry eliminates the need for external barriers when connecting to field devices in explosive atmospheres. The 8202-HO-IS limits energy levels to prevent ignition, simplifying cabinet design and reducing hardware footprints in offshore and refinery applications.
HART® Enabled Diagnostics: The module maintains transparent HART® communication. This allows maintenance teams to perform remote configuration and retrieve "Smart" diagnostics from actuators and I/P converters without interrupting the 4-20mA control signal or entering hazardous zones.
Intelligent Fault Detection: Built-in diagnostics continuously monitor the field wiring integrity. The module immediately detects and reports open-circuit conditions (threshold >685 Ω) and loads that drift beyond the driveable range, facilitating rapid troubleshooting before process deviations occur.
Extreme Environmental Resilience: Engineered for reliability, the module operates across a wide temperature range of -40 °C to +70 °C. It features a temperature stability rating of ±0.006% per °C, ensuring precision control in both arctic and tropical industrial climates.
What happens if my field device loop exceeds 650 Ω?
The module detects the high resistance as an open circuit or a "beyond range" fault. To ensure precise 4-20mA control, verify that the total loop impedance, including field wiring and device resistance, remains below the 650 Ω threshold.
Does HART communication slow down the module's response time?
Yes. In standard analog mode, the module provides an 80 ms response time. When operating in HART mode for digital data pass-through, the response time extends to 1 second to accommodate the digital signal overlay.
Is this module compatible with existing PAC8000 carriers?
Absolutely. The 8202-HO-IS features the standard PAC8000 form factor and plugs directly into the PAC8000 carrier system. It integrates seamlessly with the existing Railbus for power and data communication.
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