Analog Devices 5B47-K-05 High Performance Plug-In Signal Conditioner

The Analog Devices 5B47-K-05 is a plug-in signal conditioner engineered for Type K thermocouple measurements in industrial environments. It delivers linearized 0 to +5 V output with ±0.05% calibrated accuracy and internal cold junction compensation across the 0°C to 500°C input range. The module features transformer-based 3-way isolation rated for 1500 V rms continuous common-mode voltage, 95 dB noise rejection at 60 Hz, and integrated open thermocouple detection with user-selectable response modes.

Operating from +5 VDC ±5% at 30 mA, the 5B47-K-05 plugs into 5B Series backplanes and mounting cards for cost-effective signal conditioning in Class 1, Division 2 hazardous locations.

Technical Specifications

• Thermocouple Type: K


• Temperature Range: 0°C to 500°C (32°F to 932°F)


• Input Protection: 240 V rms at screw terminals


• Open Thermocouple Detection: Yes; upscale default or downscale via 20 MΩ, 0.25 W resistor across terminals 1 and 3


• Cold Junction Compensation: Internal, ±0.25°C @ +25°C ambient Output Characteristics


• Signal: Linearized, 0 to +5 V


• Output Resistance: 50 Ω


• Enable/Disable Control: Yes Performance


• Calibrated Accuracy: ±0.05%


• Amplifier Drift: ±1 µV/°C


• Common Mode Rejection: Excellent


• Noise Rejection: 95 dB @ 60 Hz; 90 dB @ 50 Hz


• Bandwidth: 4 Hz Electrical


• Supply: +5 VDC ±5%


• Current Draw: 30 mA


• Isolation: 1500 V rms continuous, transformer-based, 3-way Physical & Environmental


• Dimensions: 2.27" × 2.32" × 0.595"


• Encapsulation: Hard potted


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


• Mounting: 14-pin plug-in module

Key Features

• Screw terminal field wiring with 240 V rms input protection


• Transformer-isolated design for noise-critical applications


• Internal CJC eliminates external reference junction requirements


• Selectable open thermocouple detection response


• 4 Hz bandwidth suited for thermal measurement stability


• Low amplifier drift (±1 µV/°C) ensures long-term accuracy

Typical Applications

• Industrial process temperature monitoring


• Hazardous area instrumentation (Class 1, Division 2)


• Data acquisition systems requiring isolated analog conditioning


• Factory automation and control systems

Compatibility & Integration The 5B47-K-05 is pin-compatible with 5B Series backplanes and mixing with other 5B Series modules. Hot-swap capability enables field maintenance without system shutdown. Pin compatibility with 3B Series applications is available, though output ranges may differ. FM and CSA approvals authorize deployment in Class 1, Division 2, Groups A, B, C, and D locations.