FBM26

General Information

Manufacturer: Foxboro (Schneider Electric)

Model: FBM26

Series: I/A Series DCS

Type: 8‑Input / 8‑Output Isolated Discrete I/O Module

Function: Monitors 125 VDC / dry contact discrete inputs and drives discrete outputs for field devices

Environmental Rating: Class G3 harsh industrial environment (ISA S71.04)

Certification: CE, ATEX, CSA; Class 1 Division 2 / Zone 2 hazardous area approved

Protection Class: IP20

Dimensions (mm): 140 (H) × 165 (W) × 45 (D)

Weight: Approx. 600 g

Key Specifications

Channel Configuration: 8 isolated discrete inputs + 8 isolated discrete outputs

Inputs (8 Channels)

Signal Type: 125 VDC contact sense / dry contact

Logic Levels:

ON: 90–140 VDC

OFF: 0–40 VDC

Isolation: Per‑channel galvanic isolation

Outputs (8 Channels)

Output Ratings (External Powered):

15–60 VDC, up to 2 A per channel

120 VAC / 125 VDC, up to 0.5 A per channel

240 VAC, up to 0.5 A per channel

On‑state Voltage Drop: ≤ 0.2 V @ 2.25 A

Off‑state Leakage Current: ≤ 0.1 mA

General

Module Power: 24 VDC (+5% / −10%)

Power Consumption: ≤ 3 W

Operating Temperature: 0°C to +60°C

Storage Temperature: −40°C to +85°C

Humidity: 5%–95%, non‑condensing

Withstand Voltage: 600 VAC for 1 minute (channel‑to‑ground/channel‑to‑channel)

Main Features

Mixed I/O Design: 8 input + 8 output channels reduce module count and cabinet space。

Per‑Channel Isolation: Galvanic isolation between channels and ground prevents crosstalk。

Multi‑Voltage Outputs: Supports DC and AC loads via external power and termination assemblies (TAs)。

Configurable Operation:

Fail‑safe modes (hold, off, preset)

Sustained or momentary (pulse) outputs

Software‑selectable input debounce filtering

Hot Swappable: Online replacement without system shutdown。

Redundancy Support: 1:1 redundant pairing for high availability。

LED Diagnostics: Front‑panel LEDs for module status and per‑channel indication。

Ladder Logic Support: Executes discrete I/O or ladder logic programs locally。

Applications

Process Industries: Chemical, power, oil & gas, water treatment。

Mixed Discrete I/O: Valve position monitoring + on/off control, limit switches + alarm lights, relay contact monitoring + interlock outputs。

Legacy 125 VDC Systems: Power plants and facilities with 125 VDC control infrastructure。

Harsh & Hazardous Areas: Class G3 environments and Class 1 Div 2/Zone 2 classified locations。