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PDF print version of this specification : A4
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The Signal Concentrator Unit (SCU) is a real-time distribution system for ship sensor data. The SCU has been designed for mission-critical applications and therefore intrinsically supports a dual-redundation configuration of two or more SCUs.
Functions
The SCU will typically provide the following functions :
- Receives data from the following sensors : 2 Doppler Logs, 4 GPSs, 2 Electromagnetic Logs, 2 Weather Stations, 2 Echo Sounders and 2 Inertial Navigation Systems
- Monitors status of sensors
- Monitors link status to sensors
- Selects best source of sensor data
- Timestamps sensor data
- Provides age of data for selected sensor data
- Distributes sensor data
- Distributes SCU status
- Distributes status of each sensor and status of the link sensor
status
- Displays the status of the SCU, sensors and sensor
links
Features
Design and Architecture
The SCU implements a distributed hardware architecture ensuring a high level of reliability and freedom from any single point of failure.
SCU Front
View
SCU Rear View
Interfaces
The SCU provides the following interfaces :
- Configurable up to 96 high-speed serial interfaces (UART or HDLC configurable up to
20 Mbps maximum per interface)
- Up to 24 low-speed serial interfaces (UART up to 115 Kbps maximum per interface)
- 2 Ultra high-speed LAN interfaces (FDDI, Gigabit Ethernet, 10 Gigabit Ethernet, 4 Gigabit Fibre Channel, etc.)
- Up to 14 PMC slots
- Up to 6 spare VME slots
SCU Specifications
| Power Supply |
115 V, 60 Hz or 240 V, 50 Hz
The power supply requirements are specified by STANAG 1008. |
| Power Consumption |
Typically 3 A |
| Total Mass |
20 kg +/- 10 kg |
| Temperature |
0 C to 70 C
Options : 0 C to 55 C, -15 C to +75 C, -40 C to +85 C |
| Shock |
25 g (5 ms) |
| IP Rating |
IP54 (IEC-60529) |
| Heat Dissipation |
150 W |
| Noise |
< 46 dBA |
| Dimensions |
L = 420 mm
B = 483 mm
H = 450 mm ± 100 mm |
Performance
- Sensor data latency of less that 1 ms for selected high-speed serial interfaces.
- Age of data estimation, from end of reception to end of transmission, accurate to within 100 µs for sensor data on selected high-speed serial
interfaces.
- Flash RAM Storage Data for increased vibration tolerance.
Software
- VxWorks Real-Time Operating System
- C, C++ Application Software
Options
Applications
SCU Issue 4 2010-09-01
CCII Systems (Pty) Ltd • P.O. Box 171 • Rondebosch 7701 • South Africa
Telephone : (+27 21) 683 5490 • Facsimile : (+27 21) 683 5435 •
WWW : www.ccii.co.za