FOXBORO FBM241C

Technical Specifications: 8 discrete inputs configured for contact sense; internal 24 V DC excitation with maximum short-circuit current 2.5 mA; on-state loop resistance 1 kohm maximum; off-state loop resistance 100 kohm minimum; 8 discrete outputs configured as solid-state switches; external supply 15 to 60 V DC; maximum output load 2 A per channel; maximum external voltage 60 V DC; off-state leakage 0.1 mA maximum; software-selectable input debounce none, 4 ms, 8 ms, 16 ms or 32 ms; part reference P0914WM; redundant 2 Mbps FBM fieldbus support on compatible Compact 200 carriers.

Functional Features: Channel-to-channel and channel-to-backplane isolation, contact-health detection for dry inputs, configurable fail-safe output state, continuous or pulsed output modes, ladder logic execution in the module, LED status for module health and I/O points, and hot replacement on supported bases.

Application Scenarios: Valve limit and solenoid control, pump start-stop interfacing, conveyor discrete automation, interlock and emergency-stop logic, chemical and refinery motor-center integration, and packaged-skid control where external DC output power is preferred.

Performance Parameters: Input recognition according to 24 V contact-sense excitation; output switching up to 2 A at 60 V DC maximum; debounce filtering removes mechanical contact bounce; isolation voltage according to Compact 200 discipline and terminal assembly; operating temperature verified from nameplate, with standard control-enclosure ratings commonly 0 to 60 °C and extended tags rated wider.

Material Composition: Multilayer digital PCB, solid-state power switches, isolation components, molded ABS or industrial polymer housing for Compact 200 modules, metal base connector, and plated terminal interfaces through the terminal assembly.

Structural Characteristics: Narrow Compact 200 electronic module secured to the baseplate with screws; field wiring performed at the dedicated terminal assembly; inputs and outputs are not directly cabled to the electronic board; LED indicators are integrated on the front face.

Working Principle: Contact inputs are energized by internal 24 V excitation, evaluated by isolation and detection circuitry, and passed to the discrete logic engine. Output commands from the controller or onboard ladder program switch external DC load circuits through solid-state devices, returning isolated on/off power to solenoids, relays or indicators.

Installation Requirements: Install in a compatible Compact 200 baseplate with the correct terminal assembly; connect only external DC power to the output group; torque all terminal screws to specification; verify redundant fieldbus addressing before insertion; configure debounce, fail-safe action and pulse parameters in I/A engineering software.

Usage Precautions: FBM241C outputs are not self-powered; never operate outputs without the correct external supply. Do not substitute FBM241B or FBM241D, which use internal 12 V output excitation, unless the entire field wiring and load rating are redesigned. Prevent output overload above 2 A or 60 V DC. Confirm contact-input sensors are dry contacts because applying external voltage to contact-sense inputs can damage the module.