Honeywell BU/BC-THAI11 42622268-002 High Level Analog Input HART FTA Module
Configured for 16-channel analog input signal acquisition with super-imposed digital HART communication in Honeywell TDC 3000 and Experion Process Knowledge System (PKS) architectures, the Honeywell BU/BC-THA11 42622268-002 (BU/BC-THA11 Field Termination Assembly Module) provides direct physical/electrical execution. It serves as the primary electrical interface between field-mounted 4-20 mA HART transmitters and standard High Level Analog Input (HLAI) process cards, routing real-time process variables and HART diagnostic telemetry across process networks.
Suffix Breakdown & Model Matrix
| Model Code Segment | Identifier / Suffix | Technical Description |
|---|---|---|
| Base Model | BU/BC-THA11 | Field Termination Assembly (FTA) for High Level Analog Input HART signals |
| Part Number | 42622268-002 | Hardware revision order code with conformal coating for harsh industrial environments |
| Mounting Type | BU / BC Prefix | Standard DIN-rail or field termination panel mounting configuration |
| Channel Config | -THA11 | 16-channel single-ended or differential 4-20 mA input termination with HART pass-through |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | BU/BC-THA11 |
| Part Number | 42622268-002 |
| Brand | Honeywell |
| Origin | USA |
| Weight | Standard FTA mass (approx. 0.5 kg) |
| Dimensions | Standard Honeywell FTA form factor |
| Operating Temp | -40 to +85 deg C |
| Power Supply | 24 VDC nominal field power |
| Channel Count | 16 analog input channels |
| Signal Protocol | 4-20 mA HART loop protocol |
| Measurement Accuracy | +/-0.1% of span |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The BU/BC-THA11 FTA integrates precision sensing resistors and frequency-selective coupling circuits to extract FSK (Frequency Shift Keying) HART digital signals layered over standard 4-20 mA analog loops without disrupting primary process measurements. Each input channel features dedicated signal conditioning circuitry providing channel-to-channel isolation and common-mode noise rejection. This prevents ground loops between multi-drop field transmitters and protects upstream I/O processors from field-induced electrical surges.
Frequently Asked Questions
Q: Can HART smart transmitters be configured directly through the BU/BC-THA11 FTA terminals?
A: Yes, the FTA preserves frequency response up to 2.2 kHz, permitting hand-held HART communicators or asset management software to establish bidirectional FSK communication directly across the 24 VDC loop terminals.
Q: What power conditioning is required for the 24 VDC supply feeding the FTA?
A: The 24 VDC supply must be clean, regulated, and redundant where continuous system availability is required. Ripple voltage should remain below 100 mV peak-to-peak to prevent interference with HART frequency-shift digital carrier signals.
Field Installation Guidelines
- Cable Routing & Shielding: Route 4-20 mA HART field cables in separate wire trays away from high-voltage AC power lines and variable frequency drives (VFDs). Connect field cable drain wires to the dedicated shield bar at the cabinet terminal strip, ensuring single-point grounding to avoid ground loop current loops.
- Terminal Block Engagement: Strip field conductor ends to 7 mm before inserting them into screw terminals. Tighten terminal screws to a maximum torque of 0.5 Nm to maintain secure gas-tight contact without damaging the internal copper traces.
- Environmental Enclosure: Mount the assembly within IP54 or NEMA 12 rated control panels when deployed in harsh process environments to prevent moisture accumulation and particulate contamination across the operating temperature range of -40 to +85 deg C.
Honeywell BU/BC-THAI11 42622268-002 High Level Analog Input HART FTA Module
Honeywell BU/BC-THAI11 42622268-002 High Level Analog Input HART FTA Module
Configured for 16-channel analog input signal acquisition with super-imposed digital HART communication in Honeywell TDC 3000 and Experion Process Knowledge System (PKS) architectures, the Honeywell BU/BC-THA11 42622268-002 (BU/BC-THA11 Field Termination Assembly Module) provides direct physical/electrical execution. It serves as the primary electrical interface between field-mounted 4-20 mA HART transmitters and standard High Level Analog Input (HLAI) process cards, routing real-time process variables and HART diagnostic telemetry across process networks.
Suffix Breakdown & Model Matrix
| Model Code Segment | Identifier / Suffix | Technical Description |
|---|---|---|
| Base Model | BU/BC-THA11 | Field Termination Assembly (FTA) for High Level Analog Input HART signals |
| Part Number | 42622268-002 | Hardware revision order code with conformal coating for harsh industrial environments |
| Mounting Type | BU / BC Prefix | Standard DIN-rail or field termination panel mounting configuration |
| Channel Config | -THA11 | 16-channel single-ended or differential 4-20 mA input termination with HART pass-through |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | BU/BC-THA11 |
| Part Number | 42622268-002 |
| Brand | Honeywell |
| Origin | USA |
| Weight | Standard FTA mass (approx. 0.5 kg) |
| Dimensions | Standard Honeywell FTA form factor |
| Operating Temp | -40 to +85 deg C |
| Power Supply | 24 VDC nominal field power |
| Channel Count | 16 analog input channels |
| Signal Protocol | 4-20 mA HART loop protocol |
| Measurement Accuracy | +/-0.1% of span |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The BU/BC-THA11 FTA integrates precision sensing resistors and frequency-selective coupling circuits to extract FSK (Frequency Shift Keying) HART digital signals layered over standard 4-20 mA analog loops without disrupting primary process measurements. Each input channel features dedicated signal conditioning circuitry providing channel-to-channel isolation and common-mode noise rejection. This prevents ground loops between multi-drop field transmitters and protects upstream I/O processors from field-induced electrical surges.
Frequently Asked Questions
Q: Can HART smart transmitters be configured directly through the BU/BC-THA11 FTA terminals?
A: Yes, the FTA preserves frequency response up to 2.2 kHz, permitting hand-held HART communicators or asset management software to establish bidirectional FSK communication directly across the 24 VDC loop terminals.
Q: What power conditioning is required for the 24 VDC supply feeding the FTA?
A: The 24 VDC supply must be clean, regulated, and redundant where continuous system availability is required. Ripple voltage should remain below 100 mV peak-to-peak to prevent interference with HART frequency-shift digital carrier signals.
Field Installation Guidelines
- Cable Routing & Shielding: Route 4-20 mA HART field cables in separate wire trays away from high-voltage AC power lines and variable frequency drives (VFDs). Connect field cable drain wires to the dedicated shield bar at the cabinet terminal strip, ensuring single-point grounding to avoid ground loop current loops.
- Terminal Block Engagement: Strip field conductor ends to 7 mm before inserting them into screw terminals. Tighten terminal screws to a maximum torque of 0.5 Nm to maintain secure gas-tight contact without damaging the internal copper traces.
- Environmental Enclosure: Mount the assembly within IP54 or NEMA 12 rated control panels when deployed in harsh process environments to prevent moisture accumulation and particulate contamination across the operating temperature range of -40 to +85 deg C.
