Honeywell FC‑DCOM‑232485

Technical Specifications: Communication standard RS‑232, RS‑485, RS‑422; baud‑rate RS‑232: 0‑250 kbps; RS‑485/422:0‑2 Mbps; galvanic isolation voltage 2500 Vrms; power supply from system backplane 5 V DC; power consumption ≤2.5 W; operating temperature ‑40 °C ~ +70 °C; storage temperature ‑40 °C ~ +85 °C; dimension 110 mm × 70 mm × 61 mm; weight 0.66 kg; mounting DIN‑rail TS35×7.5; certification CE, TÜV, UL, FM; support Modbus RTU master/slave, ASCII protocol.

Functional Features: Galvanic electrical isolation between safety‑system side and field‑device side; software configurable baud‑rate, parity bit, data bit, stop bit; hot‑swap support; long‑distance RS‑485 transmission up to 1200 m; built‑in communication error‑detection mechanism; DIN‑rail quick‑mount structure; LED communication status indicator; support transparent transmission and Manchester coding mode.

Application Scenarios: Safety Manager SIS system connecting gas detectors, power meters, frequency converters and other third‑party serial devices; petrochemical safety‑system serial‑data interaction; power‑plant safety‑system peripheral serial equipment access; industrial safety‑instrumented system serial communication expansion.

Performance Parameters: Maximum RS‑485 transmission distance 1200 meters; isolation withstand voltage 2500 Vrms; communication error‑checking function; MTBF ≥150000 hours.

Material Composition: FR‑4 industrial‑grade printed circuit board; orange DIN‑rail plastic base; metal‑shielded module housing; optocoupler isolation chips; D‑sub‑9 connectors; TVS surge‑protection components; surface‑mount industrial communication chips.

Structural Characteristics: Split‑type structure of main communication circuit board and DIN‑rail mounting base; front‑panel equipped with D‑sub‑9 RS‑232 and RS‑485 connectors, LED status indicator; DIN‑rail clamping mechanism for quick installation and removal; internal isolation barrier separates safety‑system circuit and field‑side circuit.

Working Principle: Receive serial data from safety‑controller backplane bus; complete signal level conversion and galvanic isolation through optocoupler isolation circuit; convert internal signal into RS‑232 / RS‑485 standard electrical level and send to external field devices; receive signal from field side and transmit to safety‑controller side after isolation conversion; LED indicators reflect sending‑receiving status in real‑time.

Installation Requirements: Mount on standard TS35 DIN‑rail inside control cabinet; install module in well‑ventilated cabinet area; separate field‑side wiring from safety‑system internal wiring; use shielded twisted‑pair cable for RS‑485 field wiring; complete protective ground connection; termination resistor needs to be configured at bus terminal for long‑distance RS‑485 bus.

Usage Notes: Module supports hot‑swap, but avoid plug‑in‑out during mass‑data transmission; strictly distinguish RS‑232 and RS‑485 port wiring; set communication parameters consistent with external field‑device parameters; do not exceed maximum bus node quantity of RS‑485; prevent surge impact on field‑side ports; prohibit operation beyond rated temperature range.