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- Honeywell
- FS-SDO-0448
- Safe Digital Output Module
- USA
- 150 mm × 80 mm × 35 mm
- 0.65kg
- Xiamen, China
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✅ Product Overview: Honeywell FS-SDO-0448
📌 Product Introduction
The Honeywell FS-SDO-0448 is a high-integrity, safe digital output module designed for safety-critical industrial automation environments. Part of Honeywell’s field-proven safety system architecture, this module provides four independent solid-state outputs with a nominal voltage of 48V DC. Engineered with diagnostics, short-circuit protection, and watchdog monitoring, it is tailored for Safety Instrumented Systems (SIS) where fault tolerance and fail-safe operation are vital.
Built to comply with international safety standards and rugged enough to operate in extreme temperatures, the FS-SDO-0448 is ideal for process control environments requiring maximum uptime and operational reliability.
🔧 Product Specifications
| Parameter | Specification |
|---|---|
| Model | FS-SDO-0448 |
| Output Channels | 4 (independent) |
| Output Type | Solid-State (Fail-Safe) |
| Nominal Output Voltage | 48 V DC |
| Max Current per Channel | 0.75 A |
| Voltage Drop (max) | < 2.1 V at 750 mA |
| Load Capacitance Limit | 1 µF per channel |
| Lamp Load (max) | 125 mA |
| Off-State Leakage Current | < 0.1 mA |
| Watchdog Input Current | ~5 mA |
| Supply Voltage | 48 V DC + 5 V logic |
| Mounting Format | 4 TE width × 3 HE height |
| Operating Temperature | -40°C to +85°C |
| Certifications | CE, UL, CSA, TÜV |
| Dimensions (L×W×H) | 150 mm × 80 mm × 35 mm |
| Weight | 0.65 kg |
🌍 Applications
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Safety Instrumented Systems (SIS) in critical process industries
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Driving safety actuators, alarms, or solenoids
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Hazardous area safety shutdown logic systems
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Chemical plants, refineries, and energy facilities
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Distributed safety control systems requiring SIL compliance
✅ Key Advantages
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Fail-Safe Design: Ensures outputs switch to a safe state upon fault detection or power failure.
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Integrated Diagnostics: Real-time fault monitoring for open-load, short-circuit, and output failure.
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High Load Handling: Each channel supports up to 0.75 A, capable of controlling moderate loads directly.
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Solid-State Reliability: No mechanical wear; supports millions of operations.
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Rugged & Compact: Built for extreme temperature environments, fits efficiently in standard safety racks.
🏷 Brand & Series
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Brand: Honeywell
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Series: FS (Field-Safe)
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Module Type: SDO – Safe Digital Output Series
📊 Related or Same Series Models
| Model | Output Voltage | Outputs | Max Current / Ch | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| FS-SDO-0448 | 48V DC | 4 | 0.75 A | 150×80×35 | 0.65 |
| FS-SDO-0424 | 24V DC | 4 | 2.0 A | 150×80×35 | 0.62 |
| FS-SDO-04110 | 110V DC | 4 | 0.325 A | 150×80×35 | 0.68 |
| FS-SDO-0824 | 24V DC | 8 | 0.5 A | 180×90×40 | 0.75 |
| FS-SDOL-0424 | 24V DC | 4 | 1.0 A | 150×80×35 | 0.66 |
📊 Other Popular Honeywell Modules
| Model | Function | Voltage | Channels | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| FS-PDC-MB24-2 | Power Distribution | 24 V DC | – | 130×80×38 | 0.50 |
| FS-RO-1024 | Relay Output | 24 V / 250 V AC | 10 | 120×90×45 | 0.55 |
| FS-PSU-UNI2450U | Power Supply Module | 24 V, 5 A | – | 120×80×50 | 0.60 |
| FS-SAI-0410 | Safe Analog Input | ±10 V / 4–20 mA | 4 | 150×80×35 | 0.58 |
| FS-SDO-0424 | Digital Output | 24 V DC | 4 | 150×80×35 | 0.62 |
❓ FAQ – Frequently Asked Questions
Q1: What type of outputs does FS-SDO-0448 offer?
A1: It uses solid-state outputs for higher reliability and fast switching with no mechanical parts.
Q2: What happens in case of a power failure?
A2: All output channels default to a predefined safe state as part of its fail-safe logic.
Q3: Is this module suitable for SIL-rated systems?
A3: Yes. It is designed for use in Safety Instrumented Systems, compliant with SIL architectures.
Q4: Can it handle inductive loads like solenoids?
A4: Yes, within specified current and voltage limits; proper snubber or flyback protection is recommended.
Q5: Is it hot-swappable?
A5: No. It must be installed or removed with the system powered down to maintain integrity.
Q6: Does it include self-diagnostics?
A6: Yes. It features continuous diagnostics on output health and wiring status.
Q7: Can I mix it with other voltage modules in one rack?
A7: Yes, provided the rack and controller support voltage isolation and separation.
Q8: What is the off-state current?
A8: Less than 0.1 mA, effectively ensuring no unintentional activation of field devices.
Q9: What is its lifespan or switching cycles?
A9: As a solid-state device, it offers extremely long life—typically over a million cycles.
Q10: Is it compatible with older Honeywell Safety Managers?
A10: Yes, it is backward-compatible with most systems in the FS or Safety Manager line.