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55
Service Manual
Third edition, June 1997
4 I/O Box
The I/O box is used to interface various equipment to the
Work Station including the Level Unit. The I/O Box is made
up of a motherboard with power supply, relays and connec-
tors for seven Interface Boards.
The I/O Box is connected either to an 8-channel serial inter-
face board in the Work Station or to the Com 1 and Com 2
ports. One of these channels is used for watch dog and relay
output control. The other seven channels are wired to seven
connectors on the motherboard. Of these seven channels, one
is used for connection of the Level Unit.
The Interface Boards are used for connecting equipment such
as host computer, load calculator, ballast level gauging sys-
tem and Tank Display Units.
Via a SIOX Interface Board, a wide range of analog and digi-
tal inputs and outputs can be connected via field bus distrib-
uted I/O modules.
Level Unit (Standard)
Tank Display Units
SIOX field bus
Load calculator
Ship host computer
Ballast level gauging system
Portable Readout System
Relays
SysFail (Std.)
Common Alarm (Std.)
Aux 1
Aux 2
Aux 3
Aux 4
Aux 5
Aux 6
WS
8 x RS 232 (or 2 * RS232)
I/O Box
Optional
peripheral
units
Configurable
options
Figure 4-2 shows the I/O Box with various optional equipment
connected to it (board locations can differ).
Figure 4-1 shows the I/O
Box.