Honeywell TC-FIR081 – 3-wire RTD Analog Input

Product Overview:

The TC-FIR081 is an 8-channel 3-wire RTD analog input module designed for precise temperature measurement. It supports a wide range of RTD sensors, including platinum, nickel, and copper, and offers high accuracy with an impressive noise rejection rate. This module is suitable for industrial automation applications that require reliable and accurate temperature data collection.

Key Features:

• Model: TC-FIR081
• Brand: Honeywell
• Input Channels: 8
• Supported Sensors: Includes Pt, Nickel, and Copper RTDs
• Resolution: 16-bit across 435 Ω
• Data Format: Left-justified 16-bit 2’s complement or offset binary
• Noise Rejection: 60dB @ 60Hz with a 15Hz A/D filter cutoff
• Accuracy:
  • Normal Mode: 0.05% Full Scale
  • Enhanced Mode: 0.01% Full Scale (typical)
• Common Mode Rejection:
  • -120dB @ 60Hz; -100dB @ 50Hz
  • A/D filter cutoff @ 10Hz
• Common Mode Voltage: 0V between channels
• Overvoltage Capability: 35V DC, 25V AC continuous @ 25°C
• Bandwidth: DC to 2.62Hz (-3dB)
• RFI Immunity: Error of less than 1% at 10V/M, 27 to 1000MHz
• Excitation Current: 718.39µA
• Open RTD Detection: Out of range reading (upscale)
• Indicators: 1 red/green status indicator
• Thermal Dissipation: 10.2 BTU/hr @ 31.2V DC

Technical Specifications:

• System Throughput:
  • Normal mode: 28ms/channel to 325ms/channel
  • Enhanced mode: 56ms/channel to 650ms/channel
• Settling Time: Available at system throughput rate
• Open Wire Detection Time: Available at system throughput rate
• Power Dissipation: 3W maximum @ 31.2V DC
• Flexbus Current: 20mA
• External DC Power Supply:
  • Voltage Range: 19.2V to 31.2V DC (including 5% AC ripple)
  • Supply Current: 140mA @ 24V DC
• Dimensions: 46mm x 94mm x 53mm (1.8in x 3.7in x 2.1in)

Environmental Conditions:

• Operating Temperature: 0°C to 55°C (32°F to 131°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Humidity: 5% to 95% non-condensing (operating), 5% to 80% (non-operating)
• Shock: 30g peak acceleration, 11ms pulse (operating); 50g peak acceleration, 11ms pulse (non-operating)
• Vibration: Tested 5g @ 10-500Hz per IEC 68-2-6

FAQs:

1. What types of RTD sensors are supported?
   It supports 100Ω, 200Ω, 500Ω, Pt, Nickel, and Copper RTDs with various temperature coefficients.
2. How accurate is the module in different modes?
   In normal mode, it offers 0.05% full-scale accuracy, and in enhanced mode, it provides 0.01% full-scale accuracy (typical).
3. What is the power consumption of the TC-FIR081?
   The power dissipation is a maximum of 3W at 31.2V DC.
4. Can I use this module in high humidity environments?
   Yes, it can operate in environments with up to 95% relative humidity (non-condensing).

For more detailed information, please check official datasheet: C200-introduction