Product Description
📘 Product Overview
| Field | Details |
|---|---|
| Manufacturer | Invensys Process Systems (Foxboro) |
| Model Number | FBM214B RH927AH |
| Product Type | HART Communication Input Interface Module |
| Function | Eight 4 to 20 mA analog input channels, supporting standard 4 to 20 mA or HART FSK signals |
| System Compatibility | Interfaces with I/A Series DCS via redundant 2 Mbps module Fieldbus; compatible with modular baseplates |
| Included Components | FBM214b module; requires separate Termination Assembly (TA) and cables |
⚙️ Hardware Specifications
| Feature | Specification |
|---|---|
| Input Channels | 8 group-isolated channels |
| Input Signal | 4 to 20 mA analog signal, alone or with HART FSK signal superimposed |
| Sense Resistor | 61.9 Ω nominal |
| Total Input Resistance | 280 Ω minimum |
| Accuracy (Includes Nonlinearity) | ±0.03% of full scale |
| Temperature Coefficient | 50 ppm/°C |
| Resolution | 15 bits |
| Update Rate | 100 ms |
| Integration Time | 500 ms |
| Common Mode Rejection | >100 dB at 50 or 60 Hz |
| Normal Mode Rejection | >35 dB at 50 or 60 Hz |
| Input Impedance | 280 Ω minimum |
| Loop Power Supply Protection | Galvanically group isolated, current limited (<30 mA, ~85 mA if shorted) |
| Isolation | Group-isolated (optical and transformer) from ground and module logic; withstands 600 V AC for 1 minute (not for permanent connection) |
| Visual Indicators | LEDs for module operational status and channel communication activity |
| Construction | Rugged extruded aluminum exterior |
| Weight (Module) | 284 g (10 oz) approximate |
| Dimensions (Module) | 102 mm (4 in) height (114 mm with lugs), 45 mm (1.75 in) width, 104 mm (4.11 in) depth |
🔌 Power Requirements
| Feature | Specification |
|---|---|
| Input Voltage Range (Redundant) | 24 V DC ±5% |
| Consumption (Maximum) | 7 W |
| Heat Dissipation (Maximum) | 4 W |
🌡️ Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature (Module) | -20 to +70°C (-4 to +158°F) |
| Operating Temperature (TA, PVC) | -20 to +50°C (-4 to +122°F) |
| Operating Temperature (TA, PA) | -20 to +70°C (-4 to +158°F) |
| Storage Temperature | -40 to +70°C (-40 to +158°F) |
| Relative Humidity | 5 to 95% (non-condensing) |
| Altitude (Operating) | -300 to +3,000 m (-1,000 to +10,000 ft) |
| Altitude (Storage) | -300 to +12,000 m (-1,000 to +40,000 ft) |
| Contamination | Class G3 (harsh) per ISA S71.04, tested per EIA 364-65, Class III |
| Vibration | 7.5 m/s² (0.75 g) from 5 to 500 Hz |
✅ Regulatory Compliance
| Standard | Details |
|---|---|
| Electromagnetic Compatibility (EMC) | European EMC Directive 89/336/EEC; EN 50081-2, EN 50082-2, EN 61326 Annex A (Industrial Levels), CISPR 11 Class A; IEC 61000-4-2 (ESD: 4 kV contact, 8 kV air), IEC 61000-4-3 (10 V/m, 80-1000 MHz), IEC 61000-4-4 (2 kV on I/O, power, comms), IEC 61000-4-5 (2 kV power, 1 kV I/O, comms), IEC 61000-4-6 (10 V rms, 150 kHz-80 MHz), IEC 61000-4-8 (30 A/m, 50/60 Hz) |
| Product Safety (UL) | UL/UL-C listed for Class I, Groups A-D, Division 2, T4; Class 2 per NEC (NFPA No.70) and CSA C22.1; associated apparatus for non-incendive circuits per B0400FA |
| Product Safety (Europe) | European Low Voltage Directive 73/23/EEC; ATEX 94/9/EC; CENELEC (DEMKO) EEx nA IIC T4 for Zone 2; associated apparatus for Zone 2, Group IIC per B0400FA |
| Hazardous Location Compliance | Complies with UL, DEMKO, and ATEX for installation per B0400FA |
🛠️ Installation & Configuration
| Feature | Details |
|---|---|
| Mounting (Module) | Mounts on modular baseplate (DIN rail or 19-inch rack with kit); supports 4 or 8 FBMs |
| Mounting (TA) | DIN rail (32 mm or 35 mm) |
| Termination Assemblies | PVC Compression: P0916BX; PA Compression: P0926TD; PVC Ring Lug: P0926EA |
| Fieldbus Communication | Redundant 2 Mbps Fieldbus with FCM or FCP; auto-switches to active path |
| Calibration | Not required |
| Removal/Replacement | Can be removed/replaced without disconnecting field wiring, power, or communication cables |
| Cable Balun Module | Required for loops with common external power supply to prevent crosstalk |
| Note on RH927AH | May be a TA, cable, or accessory; assumed similar to standard TAs if a TA |
📡 Termination Assemblies and Cables
| Feature | Specification |
|---|---|
| TA Types | PVC Compression (P0916BX), PA Compression (P0926TD), PVC Ring Lug (P0926EA) |
| TA Part Number (Assumed for RH927AH) | RH927AH (not listed; likely a PVC/PA compression or ring lug TA variant, possibly superseded) |
| TA Certification | Type 1: UL/UL-C Class I, Div 2, T4; CENELEC EEx nA IIC T4 (Zone 2); Type 2: Associated apparatus for non-incendive field circuits |
| TA Wiring (Compression) | Solid/Stranded: 0.2 to 4 mm² / 0.2 to 2.5 mm² (24 to 12 AWG); Ferrules: 0.2 to 2.5 mm² |
| TA Wiring (Ring Lug) | #6 connectors (0.375 in); 0.5 to 4 mm² (22 to 12 AWG) |
| TA Weight (Compression) | 181 g (0.40 lb) approximate |
| TA Weight (Ring Lug) | 249 g (0.55 lb) approximate |
| TA Dimensions (Compression) | 125 mm (4.92 in) height, 76 mm (2.99 in) or 72 mm (2.83 in) depth |
| Cable Types | Type 1: P/PVC (Polyurethane/PVC), H/XLPE (Hypalon/XLPE) |
| Cable Lengths | Up to 30 m (98 ft) |
| Cable Connector | 25-pin male D-subminiature |
| Example Cable Part Numbers | 0.5 m: P0916DA (P/PVC), P0916VA (H/XLPE); 3.0 m: P0916DC (P/PVC), P0916VC (H/XLPE); 30 m: P0916DJ (P/PVC), P0916VJ (H/XLPE) |
🔧 Functional Specifications
| Feature | Details |
|---|---|
| HART Protocol Version | HART Protocol v6 |
| Interface | 8 group-isolated channels |
| Communication to Device | Point-to-point, master/slave, asynchronous, half-duplex, 1200 baud |
| Error Checking | Parity on each byte, one CRC check byte |
| Communication Speed | 2 messages per second |
| Fastest ECB Block Period | 500 ms |
| Maximum Distance | Up to 3030 m (10,000 ft) per HART FSK HCF_SPEC-54, Revision 8.1 (decreases with intrinsic safety barriers) |
| Compliance Voltage | 18 V DC minimum at 20.5 mA |
| Maximum Loop Resistance | 280 Ω (excluding field device) |
| Internal Power Supply | 24 V DC ±10%, common for all channels; one device per channel |
| Process I/O Communications | Redundant 2 Mbps Fieldbus with FCM or FCP; auto-switches to active path |
📦 Ordering Information
| Field | Details |
|---|---|
| Grade | Industrial |
| Model Number | FBM214b (Assumed variant of FBM214, Part Number: P0922VT) |
| TA Part Numbers (Standard) | PVC Compression: P0916BX; PA Compression: P0926TD; PVC Ring Lug: P0926EA |
| TA Part Number (Assumed) | RH927AH (if a TA, likely a variant of compression or ring lug type, possibly superseded) |
| Includes | FBM214b module (TA and cables ordered separately) |