Rolls-Royce SLIO 02 (CANMAN Distributed I/O Node Module)

Rolls-Royce SLIO 02 (CANMAN Distributed I/O Node Module)

I. Basic Definitions
SLIO = Serial Link Input/Output, a dedicated distributed hybrid I/O communication module for the MTU/Rolls-Royce Marine ship power CANMAN system, used for automatic acquisition and control of diesel engines and gas turbines in the engine room. There is also SLIO 01 and SLIO 02 in the same series with larger channel capacity.
Function: Signal acquisition gateway in the engine room, converting sensor/actuator signals into CAN MAN bus data for uploading to the main control unit CCN.

 Hardware I/O Channel Configuration (Terminal Partition)
The entire machine is divided into upper and lower layers for plug-in terminals, with mixed analog + digital + pulse channels:
ANA Analog Channel Area
AI Analog Input: 4–20mA standard process signals (pressure, temperature, valve position)
AO Analog Output: 4–20mA for driving actuators, proportional valves
DIG IN Digital Input
Passive contacts / 24VDC switch quantity: speed probes, limit switches, door switches, fault alarm contacts
DIG OUT Digital Output
Transistor 24VDC output, driving relays, indicator lights, solenoid valves
PULS Pulse / Frequency Acquisition
Speed pulses, flow meter pulses, encoder signal measurement
Communication Bus
CAN MAN (ship-specific CAN bus, standard rate of 250kbps), dual CAN redundant terminals NET A / NET B
Power Supply
24VDC shipboard DC power supply (18~34VDC wide range), power consumption approximately 120mA

Core Communication and System Architecture
Bus Protocol
Bottom layer CAN2.0B, upper layer CANMAN ship automation protocol, compatible with MTU/ROTOR engine CCN control system; compatible with the upper management network of the ship S-Bus.
Topology
Multiple SLIO02 are connected in parallel on the same CAN bus, distributed and locally collecting engine room signals, significantly reducing long-distance multi-core cables.
Real-time Performance
The fastest signal refresh cycle is 1ms, meeting the requirements for rapid response of engine speed and protection interlocks.
Diagnostic Function
Module panel status LED: power supply, CAN bus failure, module failure
Single-channel open circuit / short circuit self-check, fault codes uploaded to the upper computer through the bus
Channel overcurrent, reverse connection hardware protection

Electrical and Environmental Parameters Table
Project Parameters
Power Supply DC24V (18–34VDC)
Operating Temperature -20℃ ~ +70℃
Storage Temperature -40℃ ~ +85℃
Humidity 5%~95% RH, no condensation
Installation Standard DIN rail cabinet installation
Size 140×110×60 mm
Weight 0.52kg
Protection Industrial cast plastic enclosure, resistant to ship vibration, EMC ship classification certification
Certification Ship classification society CCS/DNV/LR ship equipment certification, CE

Core Features
Integrated high-density mixed I/O
One module can handle analog, switch, pulse speed signals simultaneously, simplifying the layout of the engine room cabinet.
Redundant CAN bus
NET A/B dual CAN interfaces, automatic switching when a single bus line fails, without interrupting the unit monitoring.
Engine room strong anti-interference design
Channel grouping electrical isolation, resisting electromagnetic interference from engine room motors and large current startup.
Tool-free maintenance
Plug-and-play terminals, replacing modules without disconnecting wires, high efficiency for equipment maintenance when the machine is stopped.
Software compatibility
Compatible with SLIO01 program, upgrading the CANMAN system does not require modifying the upper-level control program.

Typical Application Scenarios
Main diesel engine of ships, auxiliary machine MTU/Rolls-Royce unit monitoring
Centralized collection of engine room temperature, pressure, level, speed signals
Interlock control output for burners, fuel valves, cooling water pumps
Distributed IO expansion of gas turbine power control system on offshore platforms
Signal nodes of inland river / sea vessel engine room alarm monitoring system (AMS)

Distinction of the Same Model
SLIO 01: Basic simplified version, with fewer channels, suitable for small auxiliary machines
SLIO 02: High-density complete version, standard for main propulsion units, with more pulse / analog channels