Figure 4-5: Comms Selector Switch Positions - Teledyne 440 System Manual

4 – Electrical Installation
It is a good idea to keep the links on the spare Main Board set identically to those
in the SEP. This avoids potential communication problems if you need to replace
the Main Board from the field support kit during a survey.
Configure the SDC
The SDC10 provides an external switch on the comms module to configure the
communication protocol used. Do not open either the Panel PC orthe comms
enclosure to change the comms protocol.
To change the communication method you will need to move the selector switch on the comms module
to the required position (see
2 WIRE RS232
4 WIRE
C/LOOP
C/LOOP
2 Wire C/Loop
selected

Figure 4-5: Comms selector switch positions

The available switch positions are shown in
Comms Protocol
2-wire Current Loop
4-wire Current Loop
RS232
After you have changed the communication method, you must run the configuration wizard from
DeepView for Windows to re-establish comms or comms errors will be generated.
You must perform a communication check as part of the pre-dive tests. See sec-
tion 6.3.2 "Pre-dive Checks" on page 6-12 for details of the recommended pre-
dive test procedure.
4-14
WARNING
Figure 4-2 above).
2 WIRE RS232
4 WIRE
2 WIRE
C/LOOP
C/LOOP
C/LOOP
4 Wire C/Loop
selected
Figure
Switch Position
Left-hand position
Central position
Right-hand position
© Teledyne TSS
NOTE
4 WIRE RS232
C/LOOP
RS232
selected
4-54-5 and described in the table below:
NOTE
DPN 402196 Issue 4.1