TC-FIAH81 | Honeywell 8-Channel High-Level Analog Input Module

Product Overview

The TC-FIAH81 is an 8-channel high-level analog input module supporting both voltage and current signals for precise process variable acquisition.

Key Features

• 8 single-ended channels
• Configurable voltage (±10 V, 0–10 V) or current (0–20 mA, 4–20 mA)
• 12-bit resolution (unipolar)
• Overload protection
• User-to-system isolation

Technical Specifications

• Input Channels: 8 single-ended, non-isolated between channels
• Voltage Ranges: ±10 V or 0–10 V
• Current Ranges: 0–20 mA or 4–20 mA
• Resolution: 12-bit (unipolar), 11-bit + sign (bipolar)
• Input Impedance: Voltage 100 kΩ, Current 238 Ω
• Accuracy: ±0.20% full scale at 25°C
• Isolation: 850 VDC for 1 second (user to system)

FAQ

• Can voltage and current be mixed on the same module? Yes, channels are individually configurable.
• Is channel-to-channel isolation provided? No, isolation is user-to-system only.
• What is the conversion rate? 256 µs for all channels.

Installation Guide

1. Install the module in a compatible slot.
2. Configure each channel for voltage or current as required.
3. Wire sensors using appropriate shielding for analog signals.
4. Apply power and verify readings against known sources.
5. Calibrate if system procedures require it.

Selection Tips

• Choose when mixed voltage/current high-level inputs are needed.
• Confirm 8-channel density is sufficient.
• Verify isolation requirements for the application.