FBM39 digital output module

The FBM39 is a digital output module developed by Foxboro for its I/A Series Distributed Control System (DCS). It is designed to convert digital control signals from the DCS into electrical outputs to drive on-site actuators, valves, relays, and other devices, playing a key role in industrial automation control. Below is its detailed information:

1. Core Functions

Digital Signal Output: Transmits on/off control signals from the DCS to field devices, enabling operations such as starting/stopping motors, opening/closing valves, or triggering alarms.
Signal Isolation & Protection: Integrates isolation circuits between channels and the system backplane to prevent interference from industrial electrical noise and ground loops. It also includes overcurrent and short-circuit protection to safeguard both the module and connected devices.
Status Monitoring: Provides real-time feedback on output channel status (e.g., "on" or "off") to the DCS, allowing operators to verify whether control commands are executed correctly.
Fault Diagnostics: Detects abnormalities such as output overloads or channel failures, triggering local LED indicators and uploading fault information to the DCS for timely troubleshooting.

2. Technical Specifications

Category	Specific Parameters
Number of Output Channels	16 independent digital output channels.
Output Signal Types	Relay outputs (normally open contacts) or solid-state outputs (transistor-based, for DC loads).
Load Capacity	- Relay outputs: Up to 250V AC/30V DC, 5A (resistive load)- Solid-state outputs: Typically 24V DC, 1A per channel (varies by model).
Response Time	≤10ms (for solid-state outputs); ≤20ms (for relay outputs).
Isolation Performance	- Channel-to-channel isolation: ≥1000V AC (1 minute)- Module-to-backplane isolation: ≥2500V AC (1 minute).
Power Supply	24VDC ±10% (typical power consumption: ≤5W).
Operating Temperature	-40°C to 70°C (suitable for harsh industrial environments like petrochemical plants and power stations).
Storage Temperature	-40°C to 85°C