Description
Honeywell 620-1535
Technical Specifications
- Channel Count: 6 RTD input channels
- Supported Sensor: PT100, PT1000
- Wiring Mode: 3-wire, 4-wire configurable
- Temperature Measurement Range: -200 °C ~ +850 °C
- Resolution: 0.01 °C
- Isolation: 500 VAC group isolation
- Backplane Interface: IPC620 I/O Link backplane bus
- Operating Temperature: 0 °C to +60 °C
- Power Consumption: 4.4 W maximum
- Hot Swap Support: Yes
Functional Features Lead resistance compensation algorithm for 3-wire RTD connection. Open circuit and short circuit fault diagnosis for each sensor channel. Temperature unit configurable between Celsius and Fahrenheit. Programmable digital filter for temperature signal smoothing. Front panel LED indicates module power, bus communication and fault alarm. Temperature data and fault flag carry CRC checksum.
Application Scenarios Pipeline medium temperature monitoring Reactor and heat exchanger temperature measurement Motor bearing and winding temperature detection Boiler and thermal equipment temperature acquisition
Performance Parameters
- Measurement accuracy: ±0.1 °C
- Sampling rate: 20 Hz per channel
- Isolation withstand voltage: 500 VAC for 60 seconds
- Fault response time: Less than 250 ms for sensor breakage
Material Composition Multilayer FR4 PCB, high-precision ADC chip, constant current source circuit, optocoupler isolators, ultra-stable reference resistor array, TVS surge diodes, gold-plated backplane edge connector, UL94 V0 flame retardant plastic front panel.
Structural Features Standard eurocard plug-in size matching IPC620 rack slot. Front panel terminal block with clear RTD wiring marking. Internal isolation barrier separates sensor field side and backplane logic. Anti-keying notch prevents mis-insertion into voltage/current analog input slots. Constant current traces are shielded to reduce thermal drift.
Working Principle Onboard precision constant current source injects small current into RTD sensor. ADC circuit measures voltage drop on RTD and lead wires. Compensation algorithm removes lead resistance influence and calculates actual resistance value. Resistance-temperature conversion formula outputs temperature value. Open/short circuit judgment is completed by monitoring loop impedance. Data is packed and uploaded to CPU via I/O Link bus.
