Technical Specifications:

• Product Type: I/O Wiring Terminal Block
• Compatible Systems: CENTUM CS 3000, CENTUM VP, CENTUM XL
• Terminal Type: Spring-clamp terminal blocks (push-in type)
• Wire Gauge Compatibility: 0.5 mm² to 2.5 mm² (22 AWG to 14 AWG)
• Number of Terminals: 16 terminals per block (standard configuration)
• Rated Voltage: 250 VAC / 30 VDC
• Rated Current: 8 A per terminal
• Insulation Resistance: ≥ 100 MΩ at 500 VDC
• Dielectric Strength: 1500 VAC for 1 minute
• Housing Material: Flame-retardant polycarbonate (UL94 V-0 rated)
• Contact Material: Phosphor bronze with tin plating
• Operating Temperature: -10°C to +60°C (+14°F to +140°F)
• Dimensions (W × H × D): Approximately 150 mm × 30 mm × 80 mm (varies by configuration)
• Weight: Approximately 0.15 kg

Functional Features:

• Spring-clamp termination eliminates need for screwdriver — enables fast wiring
• Color-coded terminal positions match DCS I/O card channel assignments
• Test points available for each channel for field verification
• DIN rail mountable within the DCS I/O cabinet

Structural Features:

• Modular plastic housing with label strip for channel identification
• Individual spring-clamp terminals per channel
• DIN rail (TS35) mounting clips on rear
• Keyed connector for mating with DCS I/O card backplane

Working Principle:
Field instrument wires (thermocouple, RTD, 4–20 mA, etc.) are inserted into the spring-clamp terminals. The spring mechanism provides gas-tight contact without screw tightening. The terminal block routes the signals to the corresponding DCS I/O card via the backplane connector. Test points allow technicians to inject calibration signals or measure loop current without disconnecting wires.

Advantages & Highlights:

• Spring-clamp technology reduces wiring time by up to 50% compared to screw terminals
• UL94 V-0 flame-retardant housing meets fire safety requirements
• Color-coded layout minimizes wiring errors during installation and maintenance
• Test points per channel enable on-line loop verification

Applicable Industries:

• Oil and gas (onshore and offshore platforms)
• Petrochemical refineries
• Power generation (thermal, nuclear, renewable)
• Pulp and paper mills
• Steel and metal processing

Installation Requirements:

• Mount on DIN rail inside the DCS I/O cabinet
• Ensure wire stripping length matches the spring-clamp specification (8–10 mm)
• Verify wire gauge is within 0.5–2.5 mm² range
• Label all wires per the DCS I/O assignment drawing before termination

Usage Precautions:

• Do not use wire gauges outside the 0.5–2.5 mm² range — will damage the spring contact
• Do not apply more than 30 VDC / 250 VAC to any terminal
• Tighten the DIN rail mounting clips securely to prevent vibration-induced disconnection
• Replace the terminal block if any spring contact shows signs of fatigue or corrosion