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• If you cut the cable then either ground each section of the shield at that point or
connect the shields together to ground back at an origin point.
Devices and Ports: The RS-485 standard allows up to 32 devices on each
communication line. The Q-Controller supports up to 256 QEL devices on each RS-485
port. The Q-Controller does not need to be at the end of the line. The Q-Controller has
four RS-485 ports for remote devices (digital sensors and I/O modules). The ports are
logically parallel so that it does not matter which port a sensor is connected to. This
allows flexibility of wiring to suit wiring for zones, and reduction of length of lines.
Minimizing the installation total wiring distances increases the reliability of the system.
RS-485 Driver Replacement: RS-485 lines in heavy industrial environments are
sometimes subjected to magnetic disturbances causing sufficient inducted power surges
to damage the driver integrated circuit (IC). This IC U6, U7, U10, U11, U13 and U16
have sockets on the circuit card for ease of replacement in the field.
Q-Controller System Operation Manual
- 13 -
86550-001-000 Rev B
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