Description
Technical Specifications:
- Input Channel Quantity: 8 pulse input channels
- Input Signal Type: NPN / PNP transistor pulse, square wave pulse
- Working Voltage: 24 VDC
- Frequency Range: 0.1 Hz ~ 10 kHz
- Operating Temperature Range: 0 °C to +60 °C
- Storage Temperature Range: -40 °C to +85 °C
- Relative Humidity: 5% ~ 95% non-condensing
Functional Features:
- Independent channel isolation
- Pulse counting and frequency measuring dual function
- Hardware pulse shaping circuit
- Overvoltage and reverse polarity protection
- Cumulative value power-off retention
- Hot-swappable and self-diagnosis
Performance Parameters:
- Maximum Pulse Counting Speed: 10,000 pulses per second
- Pulse Amplitude Range: 3 VDC ~ 30 VDC
- Isolation Voltage: 1500 VAC per channel
- Counting Resolution: 1 pulse
- Power-off Retention Time: Unlimited (on-board memory)
Material Composition:
- Housing: UL94 V0 flame-retardant plastic
- PCB: Anti-interference FR-4 printed circuit board
- Pulse Processing Chip: High-speed counter integrated circuit
- Protection Device: Bidirectional TVS diode
Structural Characteristics:
- Standard 3U rack structure
- Front panel channel status LED indicators
- Rear backplane connector and mechanical lock
- Internal signal shielding compartment design
Working Principle:
Field pulse signals are shaped and isolated by the module internal circuit. The high-speed counter circuit counts pulse quantity and calculates signal frequency. The counted data and frequency value are transmitted to DCS system, completing flow accumulation, rotational speed calculation and related statistics.
Advantages & Highlights:
- Wide frequency range adapting to various pulse type field devices
- Power-off data retention ensures no loss of cumulative flow data
- High-speed counting capability for high-frequency pulse signals
- Complete polarity and overvoltage protection
Applicable Industries: Flow measurement in chemical, water supply, power, oil & gas industries, equipment rotational speed monitoring
Model Series: Emerson Ovation Special Signal Input Module Series
Installation Requirements:
- Vertical installation on standard DCS rack
- Pulse signal wire uses shielded cable, separate from power wire
- Confirm signal type (NPN/PNP) before wiring
Usage Notes:
- Do not access pulse signal beyond rated frequency and amplitude
- Regularly check signal line shielding performance
- Clear cumulative data only when allowed by process requirements
- Prevent static electricity during module maintenance
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