Bin Master C-100-R Operator's Manual page 10

3.2.2 SB-485 for Sensor Bus
The SB-485 connection (CN7) is a three wire terminal block located near the center of the printed circuit
board and is for connection to the RS-485 sensor bus/network. Two terminal screws marked + and – should
be connected to the positive and negative wires of the sensor network cable. The third terminal screw
marked SH should be connected to the shield of the sensor network cable. Do NOT connect the shield to
earth.
A good quality twisted-pair shielded cable should be used for the sensor network. The cable should connect
to each device on the network in a daisy-chain fashion. Branch lines or splits are not recommended. The
maximum length of the cable should be 4,000 feet or 1,220 meters.
The C-100-R control console has permanent biasing resistors for the sensor network, so remove or un-
switch any other bias resistors on all other devices connected to this network.
Devices located at the ends of the sensor network must be properly terminated. For the two devices located
at the ends, switch in their NTR or termination resistor. The C-100-R control console can be located
anywhere along the network and has a software menu for switching it's termination in or out of circuit.
3.2.3 EX-485 for Expansion Bus
The EX-485 connection (CN6) is a three wire terminal block located near the center of the printed circuit
board and is for connection to the Expansion RS-485 network. Two terminal screws marked + and – should
be connected to the positive and negative wires of the RS-485 network cable. The third terminal screw
marked SH should be connected to the shield of the RS-485 network cable. Do NOT connect the shield to
earth.
925-0389 rev A 10