Overview
The Invensys FBM203 P0914SV is an Isolated RTD Input Module for the Foxboro I/A Series DCS. It acquires temperature signals from platinum or nickel resistance temperature detectors (RTDs) and transfers the measured values to the controller. The module provides 8 isolated input channels, supports two-wire and three-wire RTD connections, and uses a redundant 2 Mbps module fieldbus for communication.
RTD Input and Channel Configuration
The FBM203 provides eight RTD input channels for connecting temperature sensors. Each channel accepts a resistance range of 0 to 320 ohms, supporting platinum and nickel RTDs. Furthermore, the two-wire and three-wire wiring configurations allow the module to accommodate different RTD connection arrangements.
The module supplies a nominal sensor current of 0.19 mA DC. Its analog accuracy is specified as +/-0.03% of span. Therefore, the input circuitry can convert the connected sensor resistance into temperature measurement data for the control system.
Channel Isolation and Communication
The module provides galvanic isolation between individual input channels and between channels and ground. This isolation separates the input circuits electrically, helping limit the transfer of electrical interference between connected sensor circuits.
Meanwhile, the module communicates with the control system through a redundant 2 Mbps module fieldbus. It receives RTD signals locally and makes the resulting measurement values available to the controller.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | FBM203 |
| Spare Model | P0914SV |
| Brand | Invensys |
| Product Type | Isolated RTD Input Module |
| System | Foxboro I/A Series DCS |
| I/O Function | RTD Input |
| Channel Configuration | 8 Inputs |
| Input Channels | 8 Isolated RTD Channels |
| Signal Range | RTD Sensor Input |
| Resistance Range | 0 to 320 ohms per channel |
| Supported Sensors | Platinum or Nickel RTDs |
| Wiring Configuration | Two-wire or Three-wire RTD Inputs |
| Sensor Current | 0.19 mA DC nominal |
| Analog Accuracy | +/-0.03% of span |
| Channel Isolation | Galvanically isolated channel to channel and ground |
| Module Fieldbus | Redundant 2 Mbps |
| Power Input | 24 V DC +5%, -10% |
| Supply Voltage | 24 V DC |
| Power Consumption | 3 W maximum |
| Mounting | Modular Baseplate |
Frequently Asked Questions
Q: How many RTD sensors can the FBM203 P0914SV connect?
A: The module provides 8 isolated RTD input channels. Each channel supports a platinum or nickel RTD with a resistance range of 0 to 320 ohms.
Q: Does the FBM203 support both two-wire and three-wire RTD connections?
A: Yes. The module supports both two-wire and three-wire RTD input configurations. Select the appropriate wiring arrangement according to the connected sensor and system configuration.
Q: What power supply does the FBM203 P0914SV require?
A: The module uses a 24 V DC power input with a tolerance of +5% and -10%. Its maximum power consumption is 3 W.
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