Description
Honeywell FC-SDO-0824V1
Technical Specifications
- Channel Quantity: 8 isolated digital output channels
- Output Type: Sinking transistor output, 24V DC
- Rated Supply Voltage: 24V DC, range 19.2V to 30V DC
- Single Channel Continuous Current: 250mA maximum
- Per-channel Short Circuit Protection: Electronic current limiting
- Isolation Voltage: 500V AC between field side and backplane logic side
- Operating Temperature: -20°C to +70°C
- Relative Humidity: 5% to 95% non-condensing
- Backplane Interface: Honeywell FC series safety rack parallel backplane bus
- Module Power Consumption: 6W maximum under full channel load
- Response Latency: Less than 1ms
Functional Features Each channel has independent electronic current limiting and short circuit latch-off protection. Real-time line diagnostic detects open circuit and short circuit on field wiring and upload fault tag to safety controller. Channel status LED indicator shows on-state, fault state and power state separately. Backplane communication adopts safety frame check with double CRC verification. Output state hold function keeps last valid state when backplane communication interruption occurs. Hardware fault voting logic inside module prevents single component failure generating spurious unsafe output. Hot swap compatible within safety rack, module replacement does not interrupt other safety channels on separate modules.
Application Scenarios SIS safety instrumented system solenoid valve drive output Emergency shutdown auxiliary alarm horn and beacon control Burner management system fuel valve on-off control Compressor emergency interlock auxiliary output Safety interlock retrofit and spare replacement for Honeywell FC safety rack system
Performance Parameters
- Output Turn-on Delay: ≤ 0.8ms
- Output Turn-off Delay: ≤ 0.8ms
- Fault Response Time: ≤ 2ms after fault condition occurs
- Channel to Channel Crosstalk: Better than -60dB
- Bus Communication Frame Error Rejection Rate: 100% for corrupted CRC frames
- Diagnostic Coverage: Above 95% for output circuit and field wiring faults
Material Composition PCB substrate: FR4 UL94 V0 flame retardant high TG material Power switch element: N-channel power MOSFET with avalanche rating Isolation component: High speed optocoupler reinforced isolation grade Passive components: Metal film precision resistors, X7R ceramic decoupling capacitors Housing: Black flame retardant plastic DIN rail rack pluggable shell Terminal block: Screw type copper alloy terminals with tin plating
Structural Features Standard plug-in card form factor matching FC series safety rack slot. Front panel contains group power LED and individual channel status LED array. Removable screw terminal block for field wiring, terminal block can be extracted without removing module from rack. Internal layout separates backplane logic zone and field power zone with isolation barrier. Card edge gold plated connector for backplane bus connection with anti-wear plating layer. Anti-reverse insertion keying tab prevents reversed installation into rack slot.
Working Principle Safety controller sends output command through rack backplane bus. Onboard logic chip verifies command frame integrity via CRC check. Valid command drives optocoupler isolation stage and turns on corresponding MOSFET output channel. Current sampling resistor continuously monitors loop current of each output channel. When current exceeds preset limit or loop impedance indicates open wire, fault latch circuit triggers and stops channel output while setting fault flag to backplane. Built-in watchdog circuit monitors local logic chip operation.
Installation Requirements Insert module into powered-off rack slot and lock retaining latch after full seating. Field wiring must use twisted shielded cable, shield grounded only at cabinet side. Separate safety output wiring from non-safety control cables inside cable tray. Verify backplane firmware revision compatibility with safety controller before commissioning. Tighten terminal screw torque to manufacturer specified range to avoid high resistance connection.
Usage Notes Do not connect inductive loads without freewheeling diode fitted at load terminals. Short circuit fault locks channel output off, power cycle module to clear latch fault after field wiring repair. Module must be used within certified safety rack assembly to maintain safety integrity rating. Do not modify internal circuit components or bypass diagnostic circuits. Do not use for load current exceeding single channel 250mA rating.
