Product Description
Product Overview
| Field | Details |
|---|---|
| Manufacturer | Schneider Electric (Foxboro) |
| Part Number | RH927AH (supersedes P0927AH) |
| Product Type | FBM214b HART Communication Input Module |
| Function | Eight 4 to 20 mA analog input channels with HART communication support |
| System Compatibility | Foxboro Evo Process Automation System, 200 Series Subsystem |
| Associated Document | PSS 31H-2S214 |
Functional Specifications
| Feature | Specification |
|---|---|
| Input Channels | 8 individually isolated channels, each supporting: - Standard 4 to 20 mA analog signal - HART Frequency Shift Keying (FSK) signal superimposed on 4 to 20 mA |
| HART Compatibility | Supports HART instruments compliant with Version 5, 6, or 7 specifications; point-to-point, master/slave, asynchronous, half-duplex at 1200 baud |
| HART Communication | - 2 messages per second - Supports universal commands for Foxboro Evo system database integration - Message pass-through for universal, common practice, and device-specific commands (no burst mode) - Uses Intelligent Field Device Configurator (IFDC) with Foxcom and HART protocols |
| Communication Interface | - FSK modem per channel for bi-directional digital communication - Error checking: parity per byte, one CRC check byte |
| Analog Input | - Sense Resistor: 61.5 Ω nominal - Total Input Resistance: 280 Ω nominal - Input Resistance (with TA): 282 Ω (externally powered), 302 Ω (internally powered) - Accuracy: ±0.03% of full scale (includes nonlinearity) - 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 |
| Loop Power Supply | - Internal: Per channel isolated 24 V DC ±10%, 18.5 V DC minimum at 20.5 mA, 20 Ω output impedance - External: Optional, requires Cable Balun Module (RH903SV) for 2+ channels to prevent crosstalk - Loop Supply Protection: Current limited to <37 mA per channel |
| Maximum Distance | Up to 3030 m (10,000 ft) per HART FSK physical layer specification HCF_SPEC-54, Revision 8.1 (reduced with intrinsic safety barriers) |
| Fieldbus Communication | Communicates via redundant 2 Mbps module Fieldbus (path A or B) with FCM or FCP |
| Software Requirements | I/A Series v8.2 to v8.8 or Control Core Services v9.0 or later |
| Calibration | Not required for module or termination assembly |
Physical Specifications
| Feature | Specification |
|---|---|
| Mounting | - Module: Mounts on modular baseplate (DIN rail or 19-inch rack, horizontal/vertical) or 100 Series conversion mounting structure - Termination Assembly: DIN rail-mounted (32 mm or 35 mm styles) |
| Weight | - Module: 284 g (10 oz) approximate - Termination Assembly (RH924JH): 181 g (0.40 lb) approximate |
| Dimensions (Module) | - Height: 102 mm (4 in), 114 mm (4.5 in) with mounting lugs - Width: 45 mm (1.75 in) - Depth: 104 mm (4.11 in) |
| Construction | - Module: Rugged extruded aluminum exterior - Termination Assembly (RH924JH): Polyamide (PA), compression screw terminals |
| Visual Indicators | LEDs for operational status and channel communication activity |
Environmental Specifications
| Parameter | Operating | Storage |
|---|---|---|
| Temperature | -20 to +70°C (-4 to +158°F) | -40 to +70°C (-40 to +158°F) |
| Relative Humidity | 5 to 95% (noncondensing) | 5 to 95% (noncondensing) |
| Altitude | -300 to +3,000 m (-1,000 to +10,000 ft) | -300 to +12,000 m (-1,000 to +40,000 ft) |
| Vibration | 7.5 m/s² (0.75 g) from 5 to 500 Hz | - |
| Contamination | Class G3 (Harsh) per ISA S71.04, EIA 364-65 Class III | - |
Power Specifications
| Feature | Specification |
|---|---|
| Input Voltage | 24 V DC +5%, -10% (redundant) |
| Consumption | 7 W (maximum) |
| Heat Dissipation | 4 W (maximum) |
Regulatory Compliance
| Certification Type | Details |
|---|---|
| Electromagnetic Compatibility (EMC) | - European EMC Directive 2004/108/EC and 2014/30/EU - Meets EN61326-1:2013 Class A Emissions and Industrial Immunity Levels |
| Product Safety | - UL/UL-C listed for Class I, Groups A-D, Division 2, T4 when connected to specified Foxboro Evo processor modules (per B0400FA) - DEMKO certified Ex nA IIC T4 for Zone 2 enclosures - Meets Class 2 requirements per NEC Article 725 and CEC Section 16 |
| RoHS Compliance | Complies with European RoHS Directive 2011/65/EU |
| Marine Certification | ABS Type Approved and Bureau Veritas certified for Environmental Category EC31 |
Ordering Information
| Field | Details |
|---|---|
| Part Number | RH927AH (FBM214b Module) |
| Related Components | - Termination Assembly: RH924JH (PA, compression, DIN rail-mounted) - Termination Cables: Type 1 (P/PVC: RH916DA-DJ, LSZH: RH928AA-AK) - Cable Balun Module: RH903SV (CBM-4, 4 baluns, for external power supply) |
| Related Documents | - PSS 31H-2S214: FBM214b HART Communication Input Module - B0400FA: Standard and Compact 200 Series Subsystem User’s Guide - PSS 31H-2SBASPLT: Standard 200 Series Baseplates - PSS 31H-2W4: Termination Assembly Adapter Modules for 100 Series Upgrade |