Kongsberg Seatex Seapath 200, Installation Manual

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Seatex Seapath 200 Installation Manual, rev. 13 Installation
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In order to galvanically isolate these lines and maybe convert them to RS-422, the Kongsberg
Seatex product HMS 100 Converter Box (part no. M410-30) can be used.
3.4.2.3 Ethernet connection
The Seapath has the possibility to output data on up to eight individually configurable
network ports. The output format, update rate and user measurement point are configured for
each port by the SCC configuration software. For the network the IP address and mask have
to be specified. The output data are sent out as an UDP (User Datagram Protocol) diagram.
The datagrams (UDPs) that are output simultaneously (same time stamp) are sent out in one
common data package. When a data package is received at the host computer, all data (UDPs)
for that sample are received.
To connect Seapath to a network hub, you must use straight-through twisted pair (TP) cable
with RJ45 connectors. Cables can be shielded (screened) or unshielded. However, shielded is
recommended used. The maximum length of the cable that can be used is 100 metres (328 ft).
A straight-through cable is one where the pins of one connector are connected to the same
pins of the other connector. In special instances, a crossover cable instead of straight-through
is needed, like connecting a Seapath Processing Unit and an HMS 100 Computing Unit
together.
Below is the pin wiring for the different TP cables:
Straight-through Crossover
Signal Pin no. Pin no. Signal Signal Pin no. Pin no. Signal
TX+ 1 1 TX+ TX+ 1 3 RX+
TX- 2 2 TX- TX- 2 6 RX-
RX+ 3 3 RX+ RX+ 3 1 TX+
RX- 6 6 RX- RX- 6 2 TX-
The pins 4, 5, 7 and 8 are not used.
3.4.2.4 1PPS signal connection
A 1 pulse-per-second (1PPS) signal synchronised with GPS time is available from the BNC
connector at the rear of the Processing Unit. This 1PPS signal originates from the GPS
receiver within the Processing Unit. The 1PPS signal is buffered and fed to the BNC
connector. The high level is at +5V (unloaded) and +2V (at 50 Ohm load). The low level is at
0V. The 1PPS signal is active high and has a pulse width of 10 ms. The 1PPS is generated
exactly once every second with its rising edge synchronised to GPS time.