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- Honeywell
- FS-SDO-04110
- Safe Digital Output Module
- USA
- 170 mm × 70 mm × 58 mm
- 0.5kg
- Xiamen, China
- New & In Stock
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Product Introduction
The FS‑SDO‑04110 is a safe digital output (SDO) module intended for use in safety instrumented systems (SIS) and other critical control environments. It provides multiple isolated, fail‑safe digital output channels capable of switching 110 V DC loads, while supporting diagnostics and “secondary means of de‑energizing” (SMOD) for added safety.
This module is part of the “safe output” family in the Honeywell Safety Manager / FS (Field Safety) architecture. It is engineered to drive resistive or inductive loads, to enforce safe states under fault conditions, and to integrate with watchdog logic to ensure system integrity.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | FS‑SDO‑04110 (safe digital output) |
| Number of Output Channels | 4 |
| Output Voltage | 110 V DC (nominal) |
| Maximum Output Current per Channel | 325 mA |
| Load Capacity | Up to ~35 W per channel (resistive/inductive) |
| Voltage Drop | < 2.5 V at 300 mA |
| Off Current | < 0.1 mA |
| Required Supply Voltages | 5 V DC (logic), internal 110 V DC, external 110 V DC |
| Supply Currents | Logic 5 V: ~25 mA; Internal 110 V DC: ~10 mA; External 110 V DC: ~20 mA (no load) |
| Diagnostic / Feature | SMOD (Secondary Means of De‑energizing), suppression diodes, self tests |
| Isolation / Safety Integrity | Solid‑state outputs, short‑circuit proof |
| Operating Temperature Range | –40 °C to +85 °C |
| Space / Rack Size | 4 TE (terminal units), 3 HE (i.e. 3U height) |
| Dimensions (L × W × H) | 170 mm × 70 mm × 58 mm (approx, from sources) |
| Weight | ≈ 0.5 kg |
| Certifications / Compliance | CE, TUV, UL, CSA (safe / industrial standards) |
Notes:
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It supports SMOD so that outputs can be de-energized independently from the main application logic, enhancing safety.
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The “safe digital output” definition here includes internal suppression diodes and short-circuit proof design.
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The module occupies “4 TE, 3 HE” in a safety system rack.
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The 110 V DC internal and external supply lines must be tied properly to avoid faults during the module’s self-test.
Applications
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Safety Instrumented Systems (SIS) in chemical, petrochemical, power, or process plants
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Control of actuators, valves, alarms, or relays in safe zones
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Fail-safe output control in emergency shutdown systems
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Redundant safety architectures where independent de-energizing is required
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Integration with Honeywell Safety Manager or equivalent safety logic systems
Advantages & Key Features
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Fail-safe design: Outputs default to safe (de-energized) state under fault or power loss
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High voltage output capability: Drives 110 V DC loads for many safety devices
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Short-circuit proof outputs: Protects the module under load faults
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Isolation & diagnostics: Each channel has suppression diode and self‑test support
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SMOD functionality: Watchdog or logic can disable outputs independent of application logic
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Wide temperature tolerance: Suitable for harsh industrial environments
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Compact footprint: Occupies only 4 TE × 3 HE, saving rack space
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Standards compliance: Meets safety and industrial certification requirements
Related / Similar Models (Same Series or Functional Group)
| Model | Channels / Output Type | Output Voltage | Max Current | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| FS‑SDO‑04110 | 4 safe digital outputs | 110 V DC | 325 mA | 170 × 70 × 58 | 0.5 |
| FS‑SDO‑0824 | 8 safe digital outputs | 24 V DC | 550 mA | ~110 × 85 × 40 | ~0.48 |
| FS‑SDO‑0448 | 4 safe digital outputs | 48 V DC | ~750 mA | (same form factor) | ~0.5 |
| FS‑SDO‑0424 | 4 safe digital outputs | 24 V DC | 2 A | ~170 × 70 × 58 | ~0.5 |
| FS‑SDOL‑0424 | Safe digital output (loop monitored) | 24 V DC | 1 A | (same rack size) | ~0.5 |
These related models cover different voltages (24 VDC, 48 VDC) or more channels but share the safe digital output function family.
Popular Honeywell Models (Other Series / Widely Used)
| Model | Function / Role | Key Specs / Capability | Dimensions / Weight (approx) |
|---|---|---|---|
| FS‑PDC‑MB24‑2 | Power / Bus controller | 24 V DC, communications module | 130 × 80 × 38 mm, ~0.5 kg |
| FS‑PDC‑IOX05 | I/O expansion distribution cable | 24 V DC power transfer | (varies) |
| FS‑AI / FS‑SAI | Safe analog input modules | 4‑20 mA input channels | (form factor similar to SDO) |
| FS‑RO‑1024 | Relay Output Module | 10 channels relay outputs | 120 × 90 × 45 mm, ~0.55 kg |
| FS‑FTA / FS‑SAO | Safe analog output / terminal boards | 0(4)-20 mA output or FTA | (comparable rack size) |
FAQ (Q & A)
Q1: What does “FS‑SDO‑04110” stand for?
A1: It denotes a Safe Digital Output module (SDO) under the FS (Field Safety) family, with 4 output channels and 110 V rating.
Q2: What are the output specifications?
A2: Four channels of 110 V DC outputs, each capable of driving up to 325 mA.
Q3: What is SMOD and why is it important?
A3: SMOD (Secondary Means Of De‑energizing) allows the watchdog or processor to shut off outputs independently of the main application logic, increasing safety.
Q4: What supply voltages does it require?
A4: It uses internal and external 110 V DC supplies plus a logic 5 V DC supply for module electronics.
Q5: What environmental range can it operate in?
A5: From –40 °C to +85 °C, making it suitable for harsh conditions.
Q6: Is the module protected against short circuits?
A6: Yes, the outputs are short-circuit proof.
Q7: What is the typical power consumption (module overhead)?
A7: Logic supply ~25 mA, internal supply ~10 mA, external no-load ~20 mA.
Q8: Can this module handle inductive loads?
A8: Yes—each output includes suppression diodes to safely manage inductive switching.
Q9: What form factor / rack space does it occupy?
A9: 4 TE width × 3 HE height (i.e. 4 HP, 3U).
Q10: How is the module connected in a safety system?
A10: Through proper wiring to internal and external 110 V DC rails and output pins d6, d8, d30 etc., following pinout diagrams in the manual.
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