Operator Manual
Issue 1
TIL – Eng – Spec – 080
Page 54 of 70
SeaHub
7.5. Making Pin 5 link between Ports C-D for ArcNet Dual Profiler
It may be required to connect a pair of ArcNet Profiler heads, operating in a Dual Profiler mode, to Ports
C & D. For this, the DIN Sockets of Ports C & D must first be configured for ArcNet Comms Mode (refer to
Section 4.3.3 on Page 22).
The SeaHub has internal jumpers (‘J19’ for Port C, ‘J22’ for Port D) which are used to configure the
operational mode of Pin 5 on the DIN Sockets.
The factory setting is for the Pin 5 of Ports C & D to be linked
through to Comms Ground. In this configuration, when either Ports
C or D are configured for RS-232 Comms Mode (refer to Section
4.3.3 on Page 22) then the RS-232 Comms ground will be
connected through on Pin 5.
When operating Port C in RS-232 Comms Mode, ensure that
‘J19’ is shorted, as indicated by the left jumper position in the
diagram to the right.
When operating Port D in RS-232 Comms Mode, ensure that
‘J22’ is shorted, as indicated by the right jumper position in the
diagram to the right.
In the case of Ports C and D being configured for ArcNet Comms
Mode, Pin 5 on these Ports will require to be isolated from Comms
Ground whenever ArcNet Dual Profiler heads are connected. In a
Dual Profiler system, the Pin 5 line is used to send synchronisation
signals between the Master and Slave heads of the Dual Head
Pair.
When operating Ports C and D in ArcNet Comms Mode, ensure
that the “top row” pins of ‘J19’ and ‘J22’ are shorted together
before connecting ArcNet Dual Head Profilers to Ports C & D.
The diagram to the right shows the jumper position for this
configuration which results in Pin 5 of DIN Ports C & D being
linked together (and isolated from Comms Ground).
