Description
Foxboro FBM42
Technical Specifications
- Channel Configuration: 8 inputs (contact/DC) and 8 high-power DC outputs.
- Application Voltage: Up to 60 VDC.
- Output Capability: Maximum 2.25 A DC per channel in steady state with unlimited short-circuit load duration.
- Overload Protection: Automatically shuts down for 1 second upon overload before retrying indefinitely.
Functional Features
- High-Current Drive: Directly drives high-power DC loads like solenoid valves and relays.
- Self-Recovering Overload: Senses overload, cuts off automatically, and attempts restart to prevent permanent damage.
- Flexible Input: Input channels configurable as pure contact detection or DC voltage monitoring.
- Expansion Capability: Supports connection of expansion modules to increase I/O capacity.
Application Scenarios
Ideal for applications requiring direct control of high-power DC actuators, such as compressor anti-surge valve control, large motor start/stop, and industrial furnace control.
Performance Parameters
- On-State Voltage Drop: Maximum 0.4 V at 1A.
- Off-State Leakage: Maximum 0.5 mA.
- Contact Resistance: Maximum 1 kΩ in on-state, minimum 100 kΩ in off-state.
- Environmental Adaptability: Operating temperature 0 to 60°C, storage temperature -40 to +70°C.
Material Composition
Features a high heat-dissipation metal housing and high-power semiconductor switching devices to ensure thermal stability under continuous high-current operation.
Structural Characteristics
- 34-Pin Connector: Uses Burndy MSD 34 PM series plug connector blocks for reliable connections.
- Dual Indicators: Terminal assemblies feature operating status (red/green) and channel status LEDs.
- Modular Baseplate: Supports DIN rail or rack mounting.
Working Principle
The FBM42 uses solid-state power switching devices instead of traditional mechanical relays. Upon receiving a control command, the power transistor conducts to supply the high-power load. If current exceeds the safety threshold, the internal protection circuit immediately cuts off the output and attempts recovery after 1 second, achieving intelligent protection.
Installation Requirements
- Must be equipped with dedicated terminal assemblies and 34-pin plug connectors.
- High-current output circuits require wires of sufficient cross-sectional area.
- Ensure adequate cooling space around the module.
Usage Precautions
- Strictly prohibited to short-circuit the output beyond 50 A, as this will cause permanent module damage.
- For inductive loads, connect a freewheeling diode externally to protect the module.
- Regularly check the voltage drop and temperature rise of output channels.
