The KONGSBERG RMP420S remote multipurpose input/output module is a high‑performance, field‑proven I/O solution designed for alarm monitoring and integrated control systems. It provides 32 fully software‑configurable solid‑state channels supporting analog input, analog output, digital input, digital output, 2/3‑wire RTD temperature, and pulse/frequency/encoder signals. Connected to the host control computer (RCU) via a redundant dual RBUS interface, the module ensures stable and reliable communication in harsh industrial and marine environments. Approved for Ex Zone 2 hazardous areas, the RMP420S combines galvanic isolation, loop protection, online configuration, dual watchdog, and soft/hard fail‑safe functions to maximize system uptime, simplify installation, reduce spare parts, and lower maintenance costs for mission‑critical applications.
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- 32 software‑configurable universal I/O channels – one module covers AI, AO, DI, DO, RTD, and pulse signals.
- Redundant dual RBUS communication – eliminates single points of failure for maximum availability.
- Galvanic isolation between communication and field circuits – protects equipment and improves noise immunity.
- Per‑channel loop monitoring & short‑circuit protected loop power – fast diagnostics and automatic fault recovery.
- Online I/O configuration – modify channel functions without system shutdown.
- Dual watchdog + soft and hard fail‑safe – safe output control if communication is lost.
- Ex Zone 2 hazardous area certification – safe for use in explosive gas environments.
- Simple installation, easy replacement, and safe firmware upgrade – reduces service time and downtime.
- Clear status LEDs – quick on‑site troubleshooting.
Technical Specifications
Electrical Data
- Supply voltage: 24 VDC (18–31.2 V)
- Typical power consumption: 10 W
- Power connectors: screw terminals for 2.5 mm² cable, torque 0.4–0.5 Nm
- RBUS: 2×9‑pin male D‑Sub, RS485, galvanically isolated
I/O Specification
- Total channels: 32 (individually configurable)
- Digital input: Namur, PNP/NPN compliant, max 4 mA @24 VDC
- Digital output: short‑circuit proof high‑side driver, trip ~1.4 A @20°C
- Analog input: 0–4 V, 0–10 V, 0–20 mA; accuracy ±0.15% FS
- PT100 RTD: −200 to +600°C, resolution ±0.5°C
- Analog output: 0–10 V, 0–20 mA; accuracy ±0.35% FS
- Pulse/frequency/encoder: up to 10 kHz pulse, 2.5 kHz encoder
Fail‑Safe Performance
- Hardware fail‑safe: ≥65 ms
- Software fail‑safe: 100 ms – 65 s (default 6 s)
- Automatic recovery for faulty channels
Environmental Ratings
- Operating temperature: −15°C to +70°C
- Storage temperature: −25°C to +70°C
- Humidity: up to 98% RH (non‑condensing)
- Protection class: IP20
- Approvals: ATEX, IACS E10, IEC 60945, IEC 60079‑0 / −7
Mechanical Data (Dimensions & Weight)
- Dimensions (H × W × D): 355 × 158 × 87 mm
- Weight: 1.35 kg
- Mounting: 35 mm DIN rail vertical mounting
Life Cycle
- Predicted failure rate @ 25°C (60% confidence): 38.5 years
- Predicted failure rate @ 35°C: 10.4 years
Typical Applications
- Marine alarm monitoring and integrated control systems
- Offshore platforms and FPSO control systems
- Oil & gas, chemical, and petrochemical plants (Zone 2)
- Industrial automation and remote data acquisition
- Power generation and energy management systems
Why Choose the KONGSBERG RMP420S?
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