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Yokogawa F3RZ81-0F
Product Overview:
The F3RZ81-0F is an 8-channel relay output card for the CENTUM VP DCS platform. Each channel features a Single Pole Double Throw (SPDT) electromechanical relay capable of switching AC and DC loads for control of final control elements such as solenoid valves, motor starters, alarms, and indicator lights. The “0F” suffix denotes non-redundant (single) configuration.
Detailed content
Technical Specifications:
- Model Code: F3RZ81-0F
- Number of Channels: 8 channels
- Output Type: Electromechanical relay (SPDT — Single Pole Double Throw)
- Contact Rating (Resistive Load): 2 A @ 250 VAC, 2 A @ 30 VDC
- Contact Rating (Inductive Load): 2 A @ 125 VAC, 1 A @ 30 VDC (cos φ = 0.4)
- Contact Material: AgSnO₂ (Silver Tin Oxide)
- Mechanical Life: ≥ 10,000,000 operations
- Electrical Life: ≥ 100,000 operations (at rated load)
- Response Time: ≤ 10 ms (typical, energize to close)
- Release Time: ≤ 5 ms (typical, de-energize to open)
- Isolation: Channel-to-channel isolation, 500 VDC
- Power Supply: 5 VDC (from CENTUM VP I/O bus)
- Power Consumption: ≤ 2.0 W (all relays energized)
- Operating Temperature Range: 0°C to +55°C
- Storage Temperature Range: -20°C to +70°C
- Relative Humidity: 5% to 95% RH (non-condensing)
- MTBF: ≥ 80,000 hours
- Dimensions (W × H × D): 25 mm × 160 mm × 165 mm
- Weight: Approximately 300 g
- Mounting Method: CENTUM VP I/O card cage (vertical insertion)
Functional Features:
- 8 independent SPDT relay contacts per card
- Supports ON/OFF control, pulse output, and alarm annunciation
- Per-channel LED indicator for output status verification
- Fail-safe configuration: Relays default to de-energized (NO contact open) on power loss
- Compatible with CENTUM VP SVP, OPR, and HIS stations for output control
- Supports latched and non-latched output modes via configuration
Applicable Industries:
Oil & Gas, Petrochemical, Power Generation, Water/Wastewater, Chemical Processing, Building Automation, Manufacturing
Installation Requirements:
- Install in CENTUM VP I/O station (AOH or ASH cabinet)
- Use wire gauge AWG 18 to AWG 26 for relay output wiring
- Install flyback diode (1N4007 or equivalent) across inductive loads (solenoids, relays)
- Maximum cable length: 100 m (for signal integrity)
Precautions:
- Do not exceed 2 A @ 250 VAC or 2 A @ 30 VDC per channel
- Do not switch capacitive loads without inrush current limiter
- Install snubber circuit (100 Ω + 0.1 μF) for highly inductive loads
- Do not use for safety-critical (SIL-rated) applications without additional safety relay
