2. WIRING
2-8
2.4 How to Terminate COM Ports (For IEC 61162-1/2
signal)
When the output/input signal used is IEC61162-1/2 format, termination is required at
the DIP switch (S2) as follows. The DIP switch is located on the TRX-PWR board, see
the figure below.
COM ports 3 to 6 are pre-terminated.
Note 1: Incorrect setting of the termination may cause communication errors.
Note 2: The factory default setting DIP switch S2 is shown in the figure below.
Note: S2 #3 to #8 are for technical personnel only. Do not change these settings.
Where the FA-1701 is part of a daisy chain, and is not the last unit in the daisy chain,
the DIP switch for the daisy chained COM port must be OFF. Where the FA-1701 is
the last unit in the daisy chain, do not change the DIP switch settings.
COM port Termination
COM1 Set S2 #1 to ON.
COM2 Set S2 #2 to ON.
ON
12345678
DIP switch S2
Transponder unit
FA-1701
Transponder unit
FA-1701
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