Risco ProSYS Plus - Wired Expansion Modules Installed on RISCO Bus Lines

09/2016 Page 17 5IN2371 C
Wired Expansion Modules Installed on RISCO Bus Lines
The following shows different types of wired expansion modules typically
installed on a RISCO bus line (all are bus devices). Note that wireless expanders
can also be wired to a RISCO bus line.
NOTES:
 The parallel wiring system supports parallel connections from any point along the
wiring.
 Maximum wire run permitted is 300 meters (1000 feet) for each leg of a bus line.
 In case of bus communication problems, connect two of the supplied 2.2K Ω
resistors, with one at each end of the bus data terminals (connecting the green
to the yellow terminals).
 For long cable runs, please use the correct cable as stated in the Wiring Appendix of
the ProSYS Plus Installation and Programming Manual.
 If connecting remote power supply units, do not connect the red wire (+12 V)
between the power supply unit and the ProSYS Plus main panel. Break the +12V
at the input to each power supply expansion module (keep 0V common).
 If additional current is required on a bus line, install power supply expansion
module(s).