Configured for digitizing process transmitter signals in Foxboro I/A Series DCS networks, the Foxboro P0917QY-0C (P0917QW Analog Input Modules) provides direct physical/electrical execution across 16 isolated analog input channels. The module samples standard 4-20 mA DC current loops, utilizing 12-bit to 16-bit A/D conversion stages to pass digitized telemetry over the fieldbus backplane. Equipped with termination assembly bypass jacks, the hot-swappable unit operates on 24 VDC nominal power and maintains galvanic isolation between field instrument wiring and central logic buses.
| Parameter | Specification |
|---|---|
| Model | P0917QY-0C (P0917QW) |
| Brand | Foxboro |
| Origin | USA |
| Weight | Standard FBM weight profile |
| Dimensions | Standard FBM carrier assembly dimensions |
| Operating Temp | 0 deg C to +60 deg C |
| Power Consumption | 8 W approx |
| Product Type | Analog Input Modules |
| Input Channels | 16 isolated analog input channels |
| Signal Range | 4-20 mA DC process signals |
| Resolution | 12-bit to 16-bit A/D conversion |
| Galvanic Isolation | Channel-to-channel and channel-to-system isolation |
| System Bus Interface | Foxboro I/A Series redundant fieldbus |
| Power Supply Input | 24 VDC nominal |
| Storage Temp | -40 deg C to +85 deg C |
| Operating Humidity | 5% to 95% non-condensing |
The input module conditions 4-20 mA current loops from field transmitters before converting analog values into system memory registers. Operators interface with the 4-20 mA HART loop protocol on connected transmitters to extract secondary variable data and diagnostic alarms across individual channels. Channel-to-channel galvanic isolation prevents ground loops from skewing signal conversion accuracies in electrically noisy environments. Integrated diagnostic circuits execute watchdog routines and continuous self-tests, driving status LEDs to signal hardware status without causing scan cycle latencies.
Q: How do integrated bypass jacks affect loop signal integrity during maintenance procedures?
A: Integrated bypass jacks allow engineers to connect test meters or signal injectors directly into the termination assembly without breaking the active 4-20 mA process loop or disconnecting field wiring.
Q: Is hot-swapping permitted while the carrier baseplate remains powered?
A: Yes, the module supports live insertion and removal on an energized backplane carrier. Keyed connectors ensure power lines engage before data bus contacts to safeguard active communication lines.
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