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Product Overview
The GE IS420YDOAS1B is a discrete output module used in the Mark VIeS Functional Safety System. It provides reliable and safe interface between control logic and discrete actuators. Designed for SIL2/SIL3 applications, it supports simplex and TMR configurations and integrates seamlessly into safety-critical industrial processes.
Technical Specifications
| Parameter | Specification |
|---|---|
| Output Type | 12 Form-C relay outputs |
| Redundancy | Simplex or Triple Modular Redundant (TMR) |
| Rated Load | 0.6A @ 125VDC, 1.2A @ 48VDC, 2.25A @ 24VDC, 2.25A @ 120/240VAC |
| Control Power | 24/28VDC, max 19.8W |
| Dimensions (H x W x D) | 170 x 157 x 153 mm |
| Weight | 1.2 kg |
| Mounting | DIN-rail |
| Safety Certification | IEC 61508 SIL2 / SIL3 compliant |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Hazardous Locations | Class 1 Div 2 / Class 2 Zone 2 / ATEX |
Applications
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Plant emergency shutdown systems
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Burner management systems
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Fire and gas detection systems
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Critical process control
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Any application requiring high-reliability discrete actuation under safety constraints
Key Advantages
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Compliant with IEC 61508 SIL2/SIL3 standards
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Supports redundancy options (simplex, TMR)
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Built-in diagnostics with visual health indicators
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Robust operation in harsh industrial environments
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Compact DIN-rail mounting
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Flexible wetting and fusing configurations via optional daughterboards
Frequently Asked Questions
Q1: What redundancy configurations does the IS420YDOAS1B support?
A1: It supports both Simplex and Triple Modular Redundant (TMR) configurations.
Q2: How many output channels are available?
A2: It provides 12 Form-C relay discrete output channels.
Q3: What safety certification does it meet?
A3: It is compliant with IEC 61508 standards for SIL2 and SIL3 applications.
Q4: Is it suitable for hazardous environments?
A4: Yes, it is certified for Class 1 Div 2, Class 2 Zone 2, and ATEX areas.
Q5: What is the rated load per relay output?
A5: Maximum 2.25A at 24VDC or 120/240VAC, 0.6A at 125VDC.
Q6: What are the mounting requirements?
A6: It is designed for DIN-rail mounting.
Q7: Can it operate in extreme temperatures?
A7: Yes, the operating range is -40°C to +70°C.
Q8: What diagnostics are included?
A8: Includes power-up self-test, feedback check, loss of wetting voltage, open fuse detection, and incorrect board check.
Q9: Are optional wetting/fusing configurations available?
A9: Yes, optional daughterboards provide wetting and fusing options.
Q10: What is the weight and size of the module?
A10: The module measures 170 x 157 x 153 mm and weighs 1.2 kg.
Related Models (Same Series)
| Model | Description | Outputs | Redundancy |
|---|---|---|---|
| IS420YDOAS1B | Discrete Output Module (current model) | 12 DO | Simplex/TMR |
| IS420YDIAS1B | Discrete Input Module | 24 DI | Simplex/TMR |
| IS420YAICS1B | Analog Input/Output Module | 10 AI / 2 AO | Simplex/TMR |
| IS420YUAAS1A | Universal Analog I/O Module | 16 configurable | Simplex |
| IS420YVIBS1B | Vibration Input Module | 13 channels | Simplex/TMR |
| IS420PSCAH1B | Modbus Master Communication Module | – | Simplex |
Popular GE Models
| Model | Description | Outputs / Function | Redundancy |
|---|---|---|---|
| IS420UCSCS2A | Mark VIeS Safety Controller | – | Simplex/Dual/TMR |
| IS420UCSCH1B | Mark VIe Gateway Controller | – | Simplex/Dual |
| IS420ESWAH1A | 8-Port Industrial Ethernet Switch | – | Non-interferring |
| IS420ESWBH1A | 16-Port Industrial Ethernet Switch | – | Non-interferring |
| IS430SSUAH1A | Universal Analog I/O Module | 16 configurable | Simplex |
| IS410SSCAH2A | Serial Communication (Modbus Master) Module | 6 serial + 1 ethernet | Simplex |
