Technical Specifications:

• Number of Channels: 8 channels
• Input Signal: 4–20mA DC (2-wire transmitter)
• Input Impedance: 250 Ω per channel
• A/D Resolution: 16-bit
• Conversion Time: 1 ms per channel (8 channels total: 8 ms)
• Isolation: 250V AC between channels, 500V AC between card and backplane
• Common Mode Rejection Ratio (CMRR): ≥ 120 dB (50/60Hz)
• Power Consumption: ≤ 2.5W per card
• Operating Temperature: 0°C to +55°C
• Housing: Eurocard format, 160 mm × 233 mm

Functional Features:

• Supports 2-wire and 4-wire transmitter configurations
• Programmable input range: 4–20mA, 0–20mA, 0–10mA (via group settings)
• Burnout detection (high/low) with alarm notification
• Per-channel calibration (zero and span) via CENTUM VP engineering station
• LED indicators per channel for status monitoring (green = normal, red = alarm)
• Hot-swappable design (with system in RUN mode, depending on configuration)

Structural Characteristics:

• Form factor: Eurocard (IEEE 299), 3U height
• Connector: Spring-clip terminal block (removable)
• Weight: approximately 0.4 kg
• Status LEDs: 8 channel indicators + power/communication LEDs

Working Principle:
Each of the 8 input channels feeds the 4–20mA signal through a 250 Ω precision resistor, converting current to a 1–5V voltage. This voltage is then digitized by a 16-bit successive approximation A/D converter. The digital value is transmitted to the CENTUM VP controller via the Vnet/IP backbone network or local bus. The card is powered from the CENTUM VP card cage backplane.

Advantages & Highlights:

• High-speed scanning (1 ms/ch) enables fast process control loops
• Excellent noise rejection with 120 dB CMRR
• Per-channel diagnostics (burnout, open wire, short circuit)
• Fully compatible with CENTUM VP R5.04 and later
• Hot-swap capability minimizes system downtime during maintenance

Applicable Industries:
Oil & Gas, Petrochemical, Chemical, Power Generation, Pulp & Paper, Steel, Pharmaceutical

Installation Requirements:

• Install in CENTUM VP card cage (e.g., VB3201, VB4101)
• Slot assignment configured via System View engineering software
• Use shielded twisted-pair cable (AWG 22–18 recommended)
• Terminate cable shields at the control room end only
• Ensure card cage is grounded per IEEE 1100 (Emerald Book) standards

Usage Precautions:

• Do not apply voltage greater than 30V DC to any input terminal
• Verify channel configuration in System View matches physical wiring before commissioning
• Replace terminal block connector carefully; do not force insertion
• Maintain card cage ambient temperature below +55°C
• Perform periodic calibration per Yokogawa recommended schedule (annual)