Bin Master C-100-R Operator's Manual page 13

Wiring
All devices on an RS-485 network must be connected directly to the network cable with no splits,
taps or branch lines. The overall length of the cable must not exceed 4,000 feet or about 1,220
meters. Use a quality twisted-pair cable with shield and connect as per the wiring diagram in
section 3.5. Observe the polarity of the wiring between all devices on the network, making sure
that the wire connected to the + terminal at the C-100-R control console is also connected to the
+ terminal on all other devices. Likewise, make sure that the wires connected to the – and SH
terminals at the C-100-R control console are also connected to the – and SH terminals,
respectively, on all other devices. Do not connect the wires or shield to anything other than that
specified.
Termination
All RS-485 networks must be terminated at both ends with a 120Ω resistor for proper operation
and reliability. Normally this is done by the two devices connected at the very ends of the
network cable. On some devices the termination is set ON or OFF by a slide switch labeled
"NTR" and on other devices this may be set IN or OUT of circuit through a software menu.
The C-100-R console uses a software menu titled "SB-485 Termination" for switching the
termination resistor IN or OUT on the SB-485 port. For the EX-485 port, the C-100-R console
has the termination resistor permanently switched in and therefore the C-100-R console must be
located at one end of the network. Refer to the manual of the other devices for instructions on
how to switch their termination.
Bias Resistors
All RS-485 networks must have bias resistors installed or switched in for proper operation and
reliability. This must be done at only one device but anywhere along the network cable.
The C-100-R control console has bias resistors permanently switched in for both the SB-485 port
and the EX-485 port, so for all other devices connected to either of these networks make sure
that the bias resistors are turned OFF or switched OUT of circuit. Refer to the manual of these
other devices for instructions on how to do so.
Protocol / Baud Rate
All devices on an RS-485 network must be configured to use the same protocol and baud rate.
This console supports three BinMaster sensors on the SB-485: the SmartSonic, the NCR-80 and
the GWR-2000. NCR-80 and GWR-2000's can be mixed on the sensor bus, but the SmartSonic
must stand alone. Selecting the appropriate sensor type will set the baud rate to be used for all
sensors.
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