CEGELEC CSR70

Technical Specifications

• Module Form Factor: Single-wide 19-inch rack pluggable module
• Overall External Dimensions: 150 mm (W) × 240 mm (H) × 350 mm (D)
• Net Module Weight: 1.98 kg
• Full Shipping Weight: 2.9 kg
• Backplane Supply Power Consumption: Max 18 W DC 24 V
• Backplane Communication Bus Speed: 2 Mbps proprietary COS bus protocol
• Maximum Process Control Loop Count: 16 independent PID closed-loop control channels
• Analog Signal Processing Channels: 8 input / 4 output onboard signal conditioning
• Digital Discrete I/O Expansion Capacity: 64 points via rear backplane extension slots
• Operating Ambient Temperature: 0 °C to +60 °C
• Storage Temperature Band: -20 °C to +75 °C
• Relative Humidity Operating Range: 5% – 95% RH, non-condensing atmosphere
• Electrical Isolation Rating: 1500 V DC between field signal circuits and backplane bus
• Vibration Compliance: IEC 60068-2-6 industrial vibration standard
• Product Lifecycle Status: Fully discontinued, factory production terminated

Function Features

1. Onboard analog signal linearisation for thermocouple, RTD, 4–20 mA industrial sensor signals
2. Multi-channel independent PID closed-loop control with auto-tune algorithm for temperature, pressure, flow process regulation
3. Digital logic interlock execution with 1 ms minimum scan cycle time
4. Hot-swap compatible rack design for non-stop online module replacement without system shutdown
5. Built-in hardware fault diagnostic LED indicators for bus communication, power supply, channel overrange and CPU failure
6. Non-volatile flash memory storage for all control logic programs and process parameter setpoints
7. Backplane bus data synchronisation with all rack-mounted I/O expansion modules
8. Overcurrent, overvoltage and reverse polarity protection circuits for all field signal terminals

Performance Parameters

• Main control CPU scan cycle minimum: 1 ms
• Analog channel full signal update latency: 8 ms
• PID control algorithm execution precision: 16-bit digital resolution
• Non-volatile program storage capacity: 128 KB flash memory
• Maximum continuous backplane bus data throughput: 256 KB/s
• Fault diagnostic response time: < 200 μs upon hardware error detection

Material Composition

• Front panel: Grey flame-retardant ABS industrial plastic with printed status legend
• Module housing frame: Die-cast aluminum alloy with black oxidation anti-corrosion treatment
• Internal circuit boards: Multi-layer FR4 PCB with tin-lead free surface finish
• Backplane edge connector: Gold-plated copper alloy contact pins for long-term plug durability
• Signal terminal blocks: PA66 glass-filled thermoplastic with spring screw clamping mechanism

Structural Characteristics

• Horizontal plug-in rack mounting structure compatible with standard COS70 system backplane racks
• Front panel integrated status LED array and module extraction lock levers on both sides
• Internal compartment separation: Front CPU control zone, rear field signal terminal zone
• Integrated passive aluminum heat sink for power regulation circuit thermal dissipation
• Full electromagnetic shielding metal casing to suppress industrial site radio frequency interference
• Rear edge connector direct mating with rack backplane bus, no intermediate wiring adapters required

Working Principle

1. Field analog and digital signals enter the module via rear terminal blocks, passing through galvanic isolation and signal conditioning circuits
2. Multiplexed analog signals convert to 16-bit digital data via onboard ADC converters and transmit to central processing unit
3. CPU executes preloaded PID control logic, digital interlock ladder programs and fault monitoring algorithms per fixed scan cycle
4. Calculated control output values convert back to analog 4–20 mA / 0–10 V signals or digital discrete switching outputs
5. Process variable data and fault diagnostic information transmit to rack backplane bus for communication with human-machine interface and other control modules
6. Hardware watchdog circuit continuously monitors CPU operation; triggers system fault alarm and safe state interlock upon processing failure

Advantage Highlights

1. Hot-swappable hardware design eliminates full DCS system shutdown during module maintenance
2. Integrated PID auto-tune function reduces on-site commissioning calibration workload
3. High channel-to-backplane isolation suppresses ground loop noise in multi-sensor process plants
4. Robust aluminum frame structure withstands continuous industrial vibration on production lines
5. Unified COS bus communication protocol achieves seamless data synchronisation with all series I/O modules
6. Complete onboard overvoltage/overcurrent protection prevents permanent module damage from field wiring short circuits

Applicable Industries

Installation Requirements

1. Insert horizontally into standard CEGELEC COS70 series rack backplane slots, lock both side extraction levers fully seated after insertion
2. Maintain minimum 30 mm vertical clearance between adjacent rack modules for passive heat sink air circulation
3. Cabinet internal cooling air flow rate minimum 0.5 m/s to maintain operating temperature within rated range
4. Connect all field signal shield cable screens to dedicated module chassis grounding terminal
5. Rack backplane must receive regulated 24 V DC power supply with ±5% voltage stability tolerance
6. Prohibit installation in cabinet zones containing corrosive gas or condensing high humidity atmosphere

Usage Notes

1. The model is fully discontinued; spare unit replacement only available via surplus industrial automation stock suppliers
2. Complete backup of all control programs to external storage before module removal to avoid parameter loss
3. Do not perform hot swap operations during critical process production periods to prevent transient control signal disturbance
4. Inspect backplane gold-plated edge connectors for oxidation before reinstallation of refurbished modules
5. Avoid exceeding 60 °C continuous ambient temperature to prevent accelerated flash memory data degradation
6. All field signal wiring must follow separate analog/digital cable routing to eliminate cross-talk interference
7. Replace internal terminal block fuse with identical rated component only upon overcurrent protection activation