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CTI Janus Programmable Automation Controller IOG
Other Topology Considerations
When multiple connections are required in close proximity, you should connect the equipment to a single terminal
block instead of dedicating a terminal block to each connection. See the figure below for connection options
.
Terminal Block connections to the trunk line should be spaced so that the total length of the trunk line separating
the taps is greater than the sum of the drop line lengths at the taps. In the illustration below, L1 should be greater
than the sum of L2 + L3.
Termination Resistors
Termination resistors must be installed at the ends of the trunk line. The resistor value required depends on the
trunk cable as specified in the table below
.
Cable Type
Resistor Value
Belden 9182
150 ohms, 5%, ¼ W
Belden
®
9860 or 9271
120 ohms, 5%, ¼ W
TB = Terminal Block
TB
Remote
Base
Controller
Remote
Base
Controller
Remote
Base
Controller
TB
Remote
Base
Controller
OR
Remote
Base
Controller
TB
Remote
Base
Controller
TB
L1
L2
L3
