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Operator Manual
SeaHub
The internal design of the SeaHub can be summarised by the figure below…
PC USB Interface
USB Hub Controller
Programmable
Gate Array
Dual USB
Interface
RAT Interface
(PS2 to USB &
RS485)
Over Current
Protection
Microprocessor
RAT Port
2 External
USB Ports
ArcNet
Controller
Dual USB
Interface
(and source selection)
Dual USB
Interface
Isolation Barrier
Status and Mode
LED’s
Differential
Driver
Serial Hardware
(RS232, RS485)
(and source selection)
Serial Hardware
(RS232, RS485,
RS422)
(and source selection)
Serial Hardware
(RS232, RS485)
Serial Hardware
(RS232, RS485)
(and source selection)
(and source selection)
Isolation Barrier
Physical Layer
Selection Circuit
Physical Layer
Selection Circuit
Physical Layer
Selection Circuit
Port A Connector
(9-Way D-Type)
Port B Connector
(9-Way D-Type)
Port C Connector
(6-Way DIN or 9Way D-Type)
Port D Connector
(6-Way DIN or 9Way D-Type)
TTL
Physical Layer
Selection Circuit
AIF (ArcNet) Connector
Issue 1
TIL – Eng – Spec – 080
Page 12 of 70