Description
Koyo F4-16DA-1
Technical Specifications
- Product Type: PLC analog output expansion module
- Number of Channels: 16 analog output channels
- Output Signal Range: 4-20mA or 0-20mA current output
- Resolution: 12-bit digital to analog conversion
- Accuracy: ±0.5% full scale
- Update Rate: Configurable channel update cycle
- Backplane Bus: DL405 PLC rack backplane bus
- Power Supply: 24VDC field supply
- Protection Rating: IP20
- Operating Temperature: 0 °C to +60 °C
Functional Features
- 16 independent analog output channels for multiple analog actuator control.
- 12-bit high resolution DAC provides precise analog signal conversion.
- Channel overrange and short circuit detection function.
- Per-channel LED status indicator for channel operation and fault state.
- Galvanic isolation between field analog circuit and PLC backplane logic circuit.
- Configurable output range selection for each channel.
- Data holding function retains last output value during CPU fault.
- Compact modular design for DL405 rack installation.
- Built-in surge protection for field wiring terminals.
- Diagnostics data sent to PLC CPU for fault alarm programming.
Application Scenarios
- Process control valve positioning signal output
- Fan and pump variable speed drive analog setpoint control
- Analog indicator and recorder signal output
- Temperature and pressure closed-loop control system
- Water treatment plant analog actuator control
Material Composition
- Housing: Flame-retardant thermoplastic plastic
- Main PCB: FR4 printed circuit board with conformal coating
- Conversion chips: 12-bit digital to analog converters
- Isolation components: Optocoupler isolation chips
- Terminal block: Copper alloy screw terminals
- Backplane connector: Gold-plated copper contact pins
Structural Characteristics
- Horizontal modular rack unit for DL405 PLC rack installation.
- Front panel with LED indicators for module and channel status.
- Front terminal block for field analog output wiring.
- Rear edge connector inserts into PLC rack backplane bus.
- Internal isolation barrier separates field analog circuit and PLC logic circuit.
- Internal layout reduces crosstalk between adjacent analog channels.
Working Principle PLC CPU writes digital setpoint values to the module via backplane bus. The onboard DAC chips convert digital values to 4-20mA analog current signals for each channel. The module continuously monitors output loop current to detect short circuit or open loop condition. Fault status is transmitted back to PLC CPU for alarm handling. Isolation components block field side surge and noise to protect PLC backplane circuit.
Installation Requirements
- Insert module into DL405 PLC rack mounted on DIN rail.
- Use shielded twisted pair cable for analog output field wiring.
- Separate analog signal cables from high-current power cables.
- Connect 24VDC field supply and protective earth wire.
- Configure channel output range in PLC programming software.
- Perform output calibration and signal measurement test after installation.
- Verify backplane bus connection before power energization.
Usage Notes
- Do not apply voltage exceeding rated specification to output terminals.
- Do not remove module while rack power remains active.
- Keep cabinet dry and free of conductive dust.
- Check terminal tightness periodically under vibration environment.
- Backup PLC program before modifying analog channel configuration.
- Disconnect field wiring before insulation resistance test.
- Replace module if channel output drift exceeds specification.
