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- Honeywell
- 900H01-0202
- HC900 Relay Output Module
- USA
- 137 x 35.6 x 151.7 mm
- 0.425 kg
- Xiamen, China
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Product Overview
The Honeywell 900H01-0202 HC900 Relay Output Module is an industrial-grade 8-channel electromechanical relay output module used in the Honeywell ControlEdge HC900 Distributed Control System (DCS) platform.
It is designed to provide reliable on/off switching control signals for external industrial devices such as solenoids, alarms, motor starters, indicators, and control relays. Each output channel operates independently using isolated relay contacts, making it suitable for both AC and DC load switching applications.
The module is widely used in process automation systems requiring electrically isolated, high-reliability discrete output control.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Honeywell |
| Model | 900H01-0202 |
| Product Type | Relay Output Module |
| Control System | Honeywell ControlEdge HC900 |
| Output Channels | 8 channels |
| Relay Configuration | 4 Form A + 4 Form C |
| Output Type | Electromechanical relay (dry contact) |
| Rated Voltage | 120/240 VAC or 30 VDC |
| Resistive Load Rating | 4 A @ 240 VAC / 30 VDC |
| Lamp Load Rating | 0.5 A @ 240 VAC / 30 VDC |
| Isolation | Galvanic isolation (channel-to-channel and logic separation) |
| Leakage Current | ≤ 1 mA @ 350 VDC |
| ON Response Time | ≤ 11 ms |
| OFF Response Time | ≤ 8 ms |
| Mechanical Life | ~5 × 10⁷ operations |
| Electrical Life | ~10⁵ operations |
| Status Indicators | LED per channel + module status LED |
| Power Supply | 5 V backplane + 24 V system loading |
| Power Consumption | ~110 mA (5 V) / ~100 mA (24 V) |
| Communication | HC900 system backplane |
| Dimensions | 137 × 35.6 × 151.7 mm |
| Weight | 0.425 kg |
| Mounting Type | HC900 rack-mounted module |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5% to 95% non-condensing |
| Diagnostics | Channel fault detection, forced output indication |
Function and Working Principle
The 900H01-0202 module operates as a digital switching interface between the HC900 controller and field devices.
Working principle:
- Control Signal Reception
Receives ON/OFF commands from the HC900 CPU via system backplane. - Relay Activation
Energizes internal electromechanical relays based on control logic output. - Load Switching
Opens or closes Form A / Form C contacts to control external devices. - Electrical Isolation
Provides galvanic isolation between control logic and field power circuits. - Feedback Monitoring
LED indicators show real-time channel status and module diagnostics. - Fault Handling
Detects forced states, wiring issues, or internal relay faults.
Role in System Architecture
The 900H01-0202 module acts as the final execution layer of control output in HC900 systems.
It is responsible for:
- Switching industrial loads based on controller logic
- Providing isolated control of external devices
- Driving alarms, solenoids, and actuators
- Enabling safe separation between control and field power circuits
- Supporting distributed automation output architecture
In industrial control systems, it functions as the physical output execution interface between digital logic and real-world equipment.
Industrial Applications
The Honeywell 900H01-0202 is widely used in:
- Oil and gas processing systems
- Petrochemical plants
- Power generation and turbine control systems
- Water and wastewater treatment facilities
- Industrial automation and manufacturing lines
- HVAC and building management systems
- Alarm and safety shutdown systems
- Conveyor and motor control applications
It is designed for continuous industrial operation requiring reliable switching of electrical loads.
Installation & Integration
Proper installation ensures safe and reliable switching performance.
- Installed in Honeywell HC900 I/O rack chassis
- Connected via system backplane to CPU module
- External loads must be wired through Form A / Form C relay contacts
- Fuses must be installed externally per load circuit (no internal fusing)
- Proper arc suppression recommended for inductive loads
- Must follow wiring separation between field power and logic circuits
- Ensure correct grounding for EMI protection
Compatible Components
The 900H01-0202 module typically works with:
- Honeywell HC900 CPU modules (C50 / C70 / C75 series)
- Digital input modules (DI modules)
- Analog I/O modules
- Relay interposing contactors
- Field solenoids and actuators
- Industrial alarm systems
- Motor starters and contactors
- SCADA control systems
Together, these components form a complete distributed process control output system.
Recommended Alternative Models
| Model | Type | Feature | Application |
|---|---|---|---|
| 900H01-0201 | Relay Output Module | Standard revision | General switching |
| 900H01-0102 | Relay Output Module | Lower channel variation | Small systems |
| 900H02-0200 | Digital Output Module | Solid-state output option | High-speed switching |
| HC900 Output Module Series | Platform | Modular expansion | Large systems |
| External Industrial Relays | Alternative | High-load switching | Retrofit systems |
Advantages
- 8-channel independent relay outputs
- Strong galvanic isolation for safety
- Supports AC and DC load switching
- High mechanical and electrical durability
- Clear LED-based diagnostics per channel
- Easy integration into HC900 architecture
- Suitable for harsh industrial environments
- Flexible application across multiple industries
FAQs
Q1: What is the main function of the 900H01-0202 module?
It provides relay-based switching control for external industrial devices.
Q2: How many outputs does it have?
It has 8 relay output channels (4 Form A + 4 Form C).
Q3: Can it switch AC and DC loads?
Yes, it supports both AC and DC loads up to rated limits.
Q4: Does it include internal fuses?
No, external fuses must be installed per output circuit.
Q5: What industries use this module?
Oil & gas, petrochemical, power generation, manufacturing, and automation systems.
Conclusion
The Honeywell 900H01-0202 HC900 Relay Output Module is a reliable industrial switching component designed for safe and efficient control of external devices. Its isolated relay architecture, strong durability, and flexible load handling make it a key output interface in HC900 distributed control systems.
It plays a critical role in ensuring accurate execution of control commands in modern industrial automation environments requiring robust and safe electrical switching.