Product Short Description
Product Overview
Specialized signal output matching card for VM600 turbomachinery vibration monitoring system, paired with MPC4 dynamic signal acquisition card, convert internal vibration monitoring data into standard industrial analog signals and relay alarm switch signals, realize data transmission to DCS/PLC and emergency trip interlock for gas turbines, steam turbines, large compressors, SIL2 safety certified machinery protection module
Description
Core Technical Specifications
- Channel Configuration
- 4 independent analog output channels (matched 4 MPC4 vibration measurement channels)
- 4 groups of programmable relay alarm contacts (RL1~RL4)
- Analog Output Parameters
- Optional Signal Type: 4~20mA current output / 0~10V voltage output (jumper configurable per channel)
- Output Signal Range: Actual drive range 2~23mA for current mode, 0~10V voltage mode
- Measurement Accuracy: ≤ ±1.5% full scale, linearity error ≤ ±0.5%
- Load Capacity: Voltage output ≥100kΩ load; Current output ≤325Ω maximum load resistance
- Relay Contact Specifications
- Contact Type: Single NO/NC configurable via internal jumper
- Rated Voltage: 250VAC, Rated Current: 5AAC
- Breaking Capacity: Max 1250VA AC load
- Environmental & Physical
- Operating Temperature: -40°C ~ +70°C
- Storage Temperature: -40°C ~ +85°C
- Humidity: 5% ~ 95% non-condensing
- Mounting: 2U standard VM600 rack plug-in card
- Dimensions: 88mm (H) × 140mm (W) × 180mm (D)
- Weight: 0.9kg
- Safety Certification: IEC 61508 SIL2 functional safety, ATEX Ex II 2G Ex d IIC T6 hazardous area certification
Function & Performance Features
- Real-time receive vibration, axial displacement, speed monitoring data from MPC4 acquisition card, convert to standardized 4-20mA analog signal for DCS system continuous monitoring
- Four independent alarm relay groups, configurable as warning alarm or dangerous trip interlock output according to machinery threshold setting
- Per-channel jumper switching of current/voltage output mode, flexible match different upper system signal collection modules
- Raw vibration signal buffered output via terminal connector, support external oscilloscope recorder debugging and data backup
- Built-in hardware watchdog circuit; automatically lock relay safe state when backplane communication fails
- Complete on-board LED indicators: rack power, communication link, analog output active, relay alarm trigger
- Full galvanic isolation between analog output, relay circuit and internal rack backplane circuit, eliminate ground loop interference in power plant environment
- Dual seal anti-electromagnetic interference design, adapt strong EMI environment of turbine generator room
Working Principle
VM600 rack backplane transmits real-time dynamic machinery measurement data from MPC4 signal acquisition card to IOC4T internal processing chip. The chip scales vibration parameters into standard 4~20mA or 0~10V analog signal and drives external DCS analog input modules. When monitoring value exceeds user-configured warning or dangerous threshold, corresponding relay coil is energized, switch contact changes state to trigger on-site alarm lamp or turbine emergency trip system. All signal output circuits adopt isolation transformers to isolate field equipment and rack internal circuits.
Material & Structural Characteristics
- Front Panel: Black metal spraying panel, labeled channel number, LED indicator window, J2 relay terminal, J3 signal test port
- Main Circuit Board: Multi-layer high-temperature PCB, isolation optocoupler, signal operational amplifier, relay drive chip
- Relays: Industrial-grade PE014005 mechanical relay with long service life, arc suppression circuit integrated
- Backplane Connector: Gold-plated multi-pin high-vibration resistant plug, fixed locking screw
Installation Requirements
- Insert IOC4T card into any vacant slot of VM600 standard 12-slot rack, tighten front panel fixing screws to resist unit vibration
- Match MPC4 dynamic signal card in adjacent rack slot via dedicated internal flat cable
- Analog output wiring uses shielded twisted pair cable, single-end shielding grounding at rack ground bar
- Relay trip interlock wiring must use explosion-proof certified cable glands for hazardous area cabinets
- Rack cabinet maintain ventilation cooling, internal temperature cannot exceed 70°C
- Separate analog signal wiring from high-power turbine control cables by ≥50cm
Application Scenarios
- Thermal power plant steam turbine vibration supervision TSI system
- Petrochemical large centrifugal compressor machinery protection system
- Natural gas pipeline gas turbine generator monitoring rack
- Steel plant blast furnace blower fan vibration safety monitoring
- Marine vessel main engine turbine condition monitoring system
Operation & Maintenance Precautions
- Do not hot plug the card during rack power-on; power off rack backplane power before disassembly
- When wiring analog output, strictly control load resistance within rated range, overload causes signal distortion
- Trip relay wiring must add external arc suppression diode for inductive load to extend relay service life
- Regularly calibrate analog output accuracy every 12 months with standard signal source
- Avoid installing rack near high-frequency ignition equipment such as ignition transformers to prevent signal interference
Reviews
There are no reviews yet.