user manual

block unscrew the terminal screws on the block and insert the ends of the appropriate wires into
each opening. Tighten the terminal screws. Pins A and B are the 709.1 LON channel port pins.
For FTT-10 transceivers, use the A and B pins. e pins are polarity insensitive. For RS-485
transceivers use the A and B pins appropriately and insert the RS-485 ground lead into the
terminal block pin with the (ground) symbol next to the pin labeled A. ere are two power
input pins labeled (logic ground) and 5VDC. e GRouter4A requires regulated 5 Volt DC
positive on the 5VDC pin. Attach the ground pin from the power supply to the pin labeled .
e power input is polarity sensitive but does have reverse polarity protection. If aer powering
up the 5V input, the power LED does not light up, disconnect power and check the polarity of the
input power wires before recycling power. Applying a reverse voltage for an extended time period
may damage the GRouter4.
Fig.1.13: Front terminal block detail with standard connector
Fig.1.14: Front terminal block detail with optional pluggable connectors
1.8.4. FTT-10 XCVR LonTalk Network Termination
When using an FTT-10 XCVR, the network wiring should be terminated or performance may
suer. is is especially true for long wire runs or noisy environments. Typically an external
terminator is used. e GRouter4, however, does have an optional internal terminator for those
applications where it is desirable or convenient to terminate at the router. When the optional
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