For several years, CHANGXIN have specialized in trading high-quality components in the field of industrial automation.
Focusing on PLC components, DCS and CNC technology, and drivetechnology
Saacke FSC-IO 4RO/1AO signal output expansion unit
| Brand: Saacke |
| Item NO: FSC-IO 4RO/1AO |
| Effect: Burner Management I/O Expansion Module |
| Condition: In stock, brand new/Used |
| Warranty: 365 days |
| Payment:T/T 50% deposit, 50% balance |
| www.szcxdcs.com |
+86 15359298293
Saacke FSC-IO 4RO/1AO signal output expansion unit
FSC-IO 4RO/1AO belongs to the IO expansion module supporting the Saacke SEAVIS combustion management system, and is the signal output expansion unit of the industrial boiler burner safety control system. The module is connected to the FSC main controller bus, which includes 4 relay outputs (RO) and 1 analog output (AO); 4-channel relay dry contacts are used to output burner start stop, valve control, fault alarm, and status indication switch signals; 1 channel of 4-20mA analog output is used to output continuous adjustment control signals for load, air door, and gas valve. FSC-IO 4RO/1AO is specifically designed for safe sequential control and continuous adjustment of gas/oil burners, in conjunction with FSC control to achieve ignition, flame monitoring, and fuel valve interlock protection. It is an important extension spare part of Saacke boiler combustion safety system.

Product features
- Integrated 4-channel passive relay contact output, with strong contact isolation capability, can directly drive solenoid valves, alarm indicator lights, and external interlocking circuits.
- Single channel 4-20mA analog output, used for continuously adjusting the damper actuator or gas regulating valve to achieve continuous adjustment of boiler load.
- Compatible with SEAVIS FSC combustion main control bus and used in conjunction with FSC-01 main controller to expand control channels.
- Channel electrical isolation to isolate strong electrical interference on site and prevent external surges from damaging the combustion safety control unit.
- Channel fault diagnosis function, which can trigger fault alarms for bus disconnection, module power supply abnormalities, and channel faults.
- DIN rail buckle installation, easy to install and disassemble, suitable for internal layout of boiler control cabinets.
- Fault safe design, the relay returns to a safe state when the system loses power, ensuring the safe cut-off of the burner fuel valve.
- Wide temperature working range, suitable for industrial site environments with high temperature, dust, and vibration in boiler rooms.
- Status LED indicator light provides a visual view of module power supply, bus communication, and output channel status, facilitating on-site maintenance.
Main product range
- Control system (DCS/PLC/CNC): panel controller, HMI and human-machine interface, industrial PC, CPU processor module, communication module, analog/digital I/O module
- Drive and motion control: frequency converter, servo drive, servo motor, power module
- Robot spare parts: key spare parts such as robot control board, axis computer, servo unit, I/O module, etc
- State monitoring and safety system: vibration monitoring system, safety instrumented system (SIS), redundant controller
Application Industry
The products are widely used in various industrial fields such as metallurgy, oil and gas, petrochemicals, electricity, power transmission and distribution, water conservancy, water treatment and environmental protection, coal mining, aluminum industry, glass manufacturing, paper and printing, textile printing and dyeing, machinery manufacturing, electronics manufacturing, automobile manufacturing, plastic machinery, boiler heating, energy, etc.
Saacke FSC-IO 4RO/1AO signal output expansion unit

Main brand
| No. | Brand | Country/Region | Main Product Lines | Typical Series/Models |
| 1 | ABB | Switzerland | PLC/DCS Controllers, I/O Modules, Robot Spare Parts, Drive Systems | AC800PEC,AC800M, AC800F, AC31, 800xA, Bailey INFI 90, DSQC Robot Modules, Advant OCS, H&B Freelance |
| 2 | Bently Nevada | USA | Condition Monitoring Systems, Vibration Sensors, Proximitors | 3500 Monitoring System, 3300 Monitoring System, Eddy Current Probes, Proximitors |
| 3 | TRICONEX | USA | Safety Instrumented Systems (SIS), TMR Redundant Controllers | Tricon System Modules, Communication Modules, I/O Modules |
| 4 | Woodward | USA | Steam/Gas Turbine Control, Speed Governing Systems, Actuators | 505 Governor, ProTech, MicroNet, NetCon Series |
| 5 | FOXBORO | USA | DCS Systems, I/A Series Control Modules | I/A Series, FBM Modules, Controllers |
| 6 | WESTINGHOUSE | USA | DCS Systems, Ovation Controllers, Modules | Ovation System, WDPF Series |
| 7 | Motorola | USA | Industrial Communication Modules, Embedded Control Modules | MVME Series, VME Bus Modules |
| 8 | GE | USA | PLC, Excitation System Modules, CPU/Communication/Analog Modules | IS200/DS200 Excitation Cards, IC693/IC695/IC697/IC698/IC200/IC660/IC670 Series |
| 9 | YOKOGAWA | Japan | DCS Systems, CPU Modules, I/O Cards | CENTUM CS3000, CS1000, VP Series |
| 10 | HIMA | Germany | Safety Control Systems, SIL Safety Modules | H41q/H51q, HIMax, HIMatrix Series |
| 11 | EMERSON | USA | DCS Systems, Redundant Controllers, Safety Systems | Ovation, DeltaV Dual-Channel Redundant Safety Systems |
| 12 | Honeywell | USA | DCS Systems, Process Control Modules | Experion PKS/LS/HS, Plant Scape, TDC2000, TDC3000, TPS, Alcont |
| 13 | ICS TRIPLEX | UK | Trusted Safety Control Systems, TMR Modules | Trusted System, T8000 Series |
| 14 | Kollmorgen | USA | Servo Drives, Servo Motors, Motion Control | S700, S300, AKD Series Drives, Servo Motors |
| 15 | PROSOFT | USA | Industrial Communication Modules, Protocol Gateways | MVI69, MVI56, MVI94, MVI71, MVI46, PS69, 3150 Series |
| 16 | Alstom | France | Power Control, Protection Relays, Control Systems | GEC ALSTHOM, Protection and Control Modules |
| 17 | EATON | USA | Electrical Control, PLC, Power Supplies, Circuit Breakers | XC/XN Series PLC, Moeller Series, Power Supply Modules |
| 18 | Allen-Bradley (Rockwell) | USA | PLC Controllers, I/O Modules, Communication Modules | ControlLogix 1756, CompactLogix 1769, SLC 500 1747/1746, PLC-5 1771/1785 |
| 19 | Schneider | France | PLC, Modicon Series, CPU/Communication Modules | Quantum 140, Modicon M340, Modicon Premium |
————————Shenzhen Changxin Automation Equipment Co Ltd -————————
Products that have been released are welcome for consultation. Due to the wide variety of models, we were unable to upload physical images one by one!
![]()

Parameter Specifications
| Parameter | Specification |
|---|---|
| Part Number | FSC-IO 4RO/1AO |
| Product Type | Burner Management I/O Expansion Module |
| Brand | Saacke |
| Series | SEAVIS FSC series |
| Digital Output | 4 Relay Outputs (RO), potential free contact |
| Relay Contact Rating | 250V AC, 5A per channel |
| Analog Output | 1 channel AO, 4~20mA DC |
| AO Resolution | 12 bit |
| AO Load Resistance | Max 500Ω |
| System Bus | SEAVIS internal system bus |
| Power Supply | 24V DC, range 18~30V DC |
| Power Consumption | Max 3.6W |
| Status Indicator | LED for power, bus status, channel fault |
| Galvanic Isolation | Galvanic isolation between field and control circuit |
| Operating Temperature | -20℃ ~ +60℃ |
| Storage Temperature | -40℃ ~ +85℃ |
| Relative Humidity | 5% ~ 90%, non-condensing |
| Vibration Resistance | IEC 60068-2-6 |
| Mounting | 35mm DIN rail mounting |
| Protection Class | IP20 (installed inside control cabinet) |
| Dimensions (W×H×D) | 188 mm × 110 mm × 75 mm |
| Net Weight | 0.62 kg |
| Certifications | CE, EN 61508 functional safety related |
| Lifecycle Status | Spare parts available |








