Foxboro RH101AA – Intrinsically Safe I/O Base Module

Overview

The Foxboro RH101AA is a versatile, high-reliability module designed for the Foxboro I/A Series Distributed Control System (DCS). Depending on the configuration, it can function either as a precision pressure transmitter or an analog input/output (AI/AO) module. Moreover, its intrinsically safe design ensures reliable operation in hazardous industrial environments, while providing long-term measurement stability and seamless integration with smart field devices using HART® communication.

Technical Specifications

• Model: RH101AA

• Type: Pressure Transmitter / Analog I/O Module

• System Compatibility: Foxboro I/A Series DCS

• Pressure Transmitter Accuracy: ±0.1% of span, ±0.05% long-term stability

• Pressure Range Options: 0–100 psi up to 0–2000 psi

• Housing Material: 316L stainless steel, IP67 sealed

• Output Signal (Transmitter): 4–20 mA, 1–5 V, 0–10 V with HART®

• AI/AO Inputs: 8 channels (configurable: current, voltage, TC, RTD)

• AI/AO Outputs: 4 channels (4–20 mA or 0–5 V)

• Resolution: 16-bit A/D and D/A conversion

• Input Voltage: 24 VDC nominal

• Operating Temperature: –40 °C to +85 °C

• Storage Temperature: –50 °C to +95 °C

• Humidity Range: 5% – 95% non-condensing

• Certifications: CE, RoHS, ATEX

• Application Areas: Oil & gas, chemical plants, refining, power generation, pulp & paper, water treatment

FAQ

Q1: Can the RH101AA be used in hazardous areas?
Yes, it is intrinsically safe and ATEX-certified for hazardous environments.

Q2: What types of input signals are supported in AI/AO mode?
It supports 4–20 mA, 0–5 V, thermocouples (J/K/T), and RTDs (Pt100).

Q3: Which communication protocol does it support?
The module supports HART® for seamless integration with smart field devices.

Q4: What is the operating temperature range?
It operates between –40 °C and +85 °C in demanding industrial conditions.