Description
Honeywell FS-SDI-1624
Technical Specifications
- Channel Quantity: 16 24VDC safe digital input channels
- Input Signal: Sinking / sourcing 24VDC discrete input
- Rated Input Voltage: 18VDC to 30VDC
- Backplane Communication: Safety Manager redundant backplane bus
- Working Temperature: -20°C to +70°C
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 90% RH non-condensing
- Isolation Rating: 1500VAC field to logic side isolation
- Mounting: Plug-in installation on Safety Manager I/O rack
- Certification: TÜV SIL2, UL, C-UL, CE, FM
Functional Features Each channel supports sinking and sourcing input mode configuration. It implements dual redundant signal cross-checking for safety diagnostic. It detects open circuit, short circuit and abnormal voltage for each channel. It supports hot swap replacement during SIS running. It uploads channel fault status and diagnostic code to Safety Manager alarm system. It provides LED status indicator for power, module fault and each channel. It supports de-bounce time setting for switch contact signal.
Application Scenarios ESD valve limit switch feedback signal collection Chemical plant safety interlock dry contact signal acquisition Oil and gas pipeline emergency valve position feedback Boiler burner auxiliary equipment safety status input Refinery reactor safety trip discrete signal monitoring Safety Manager SIS digital input spare module replacement
Performance Parameters
- Input Response Delay: Less than 0.3ms
- Insulation Resistance: Greater than 1000 MΩ
- Mean Time Between Failures: 880000 hours
- Diagnostic Coverage: Greater than 94% of safety faults
- ESD Immunity: 8kV contact discharge
Material Composition FR4 flame retardant PCB with optional conformal coating High speed optocoupler isolation array Dual redundant signal sampling circuit TVS surge suppression diodes Current sampling resistors ABS flame retardant front panel Tri-color LED indicators Metal locking buckle and gold finger contacts
Structural Features Standard plug-in I/O module form factor for Safety Manager rack. Front panel integrates power, fault and channel LED indicators. Side anti-misalignment notch prevents reverse insertion. Rear gold finger contacts connect to rack backplane bus. Internal circuit adopts dual redundant sampling architecture for safety cross-verification. Isolation barrier separates field circuit and internal logic circuit. Lock clip secures module on rack slot.
Working Principle Field 24VDC discrete signal enters module through matched FTA termination assembly. Optocoupler converts field voltage signal into logic level and isolates field circuit. Dual redundant sampling circuit reads signal status independently. The core logic compares two sampling results. If results match, the signal status is sent to Safety Manager controller. If deviation appears continuously, the module triggers fault alarm and reports diagnostic information.
Installation Requirements Power off rack before inserting module. Align notch and insert into vacant I/O slot, lock buckle. Connect field switch shielded cable to matched FTA terminal block. Configure input mode, de-bounce time and fault parameters in Safety Manager engineering software. Power on rack and verify channel status matches field switch action. Separate signal cable from high voltage power cable.
Usage Notes Do not apply AC voltage to any input terminal. Input voltage must stay within 18VDC to 30VDC range. Static protection wrist strap must be worn during module replacement. Set proper de-bounce time for mechanical contact switches to avoid bounce interference. Do not use this module for non-safety ordinary control loop without engineering approval.
