Foxboro FBM37 (P0400HH) – 8‑Channel Isolated Analog Output Module

Specifications & User Guide (Copy‑Ready English)

General

Model: FBM37 (P0400HH)

System: Foxboro I/A Series / EcoStruxure Foxboro DCS

Type: 8‑channel galvanically isolated analog output (AO) module

Function: 0–20 mA / 4–20 mA control signals for valves, actuators, VFDs

Redundancy: 1:1 hot‑swap redundant capable

Hot Swap: Supported (no system shutdown)

Certification: CE, UL, CSA, ATEX; Class I Div 2 / Zone 2

Environment: Class G3 (harsh industrial)

Operating Temp: 0 °C to +60 °C

Storage Temp: −40 °C to +85 °C

Humidity: 5–95 % non‑condensing

Enclosure: Die‑cast aluminum, IP20 rated

Dimensions: 140 mm × 165 mm × 45 mm

Weight: 0.65 kg

I/O Channel Specifications

Channels: 8 galvanically isolated (channel‑to‑channel & channel‑to‑ground)

Signal Range: 0–20 mA (default); 4–20 mA (configurable)

Resolution: 13‑bit

Accuracy: ±0.05 % of span (includes linearity)

Temperature Coefficient: ±50 ppm/°C

Output Delay: ≤30 ms (max)

Isolation: 600 VAC (1 min) channel‑to‑channel & channel‑to‑ground

Short‑circuit & Overload Protection: Per channel (current‑limited, auto‑recovery)

Load Resistance: 0–750 Ω (20 mA @ 18 VDC compliance)

Status LEDs: 8 channel (ON/FAULT) + module RUN/FAULT

Power

Supply: 24 VDC (±5 % / −10 %), redundant

Consumption: 10 W (single); 16 W (redundant pair)

Heat Dissipation: 9.5 W (single); 15.3 W (redundant pair)

Communication

Fieldbus: Redundant 2 Mbps backplane (I/A Series)

Protocol: Foxboro proprietary

Data Update: 50 ms (default)

Basic Installation & Usage

Mounting

Snap into standard I/A Series DIN rail or baseplate.

Secure latch; ensure full seating for backplane contact.

Wiring

Connect field devices (control valves, positioners, VFDs) to TA (Termination Assembly).

2‑wire AO: (+) from module, (−) to device; common ground not required (isolated).

Use shielded twisted pair; separate analog and digital cables.

Wiring size: 0.2–4 mm² (24–12 AWG); ferrules recommended for stranded wire.

Configuration (I/A Series Software)

Set signal range: 0–20 mA or 4–20 mA.

Configure scaling, failsafe state (hold / 0 % / 100 %), and update rate.

Enable channel diagnostics (short circuit, open load, overrange).

Assign redundancy role (primary/secondary) if applicable.

Operation

RUN (green): module ok; FAULT (red): error (comms, power, channel fault).

Channel LED: ON = active; FLASH = fault (short/open/overload).

Monitor output values, status, and diagnostics in HMI.

Maintenance

Hot‑swap faulty module (no shutdown; TA wiring remains intact).

Inspect TA wiring, shields, and grounds annually.

Update firmware via I/A Series software.

Calibration: Not required (factory‑calibrated; on‑board diagnostics).

Typical Applications

Analog control outputs for control valves and actuators.

4–20 mA signals for variable frequency drives (VFDs) and motor controllers.

Interface to non‑HART analog devices in process industries.

Migration of legacy 100‑series FBMs (e.g., FBM05) to modern I/A Series systems.