Appendices:
Page 11
PM9605 Revision 1, 9605 Version 36.1.1
Computer
9605
9605
SLC500
A DH+ network is constructed with a main trunkline and optional droplines. In the example above the trunkline
runs from one 9605 to the SLC-500 and onto the second 9605 in a simple daisy chain fashion. The programmer is
connected to the SLC-500 via channel 0(DF1). A terminating resistor must be connected at each end of the
trunkline to provide proper line loading thus reducing signal interference. Devices intended for use on the DH+
network must include, as part of their interface hardware, a line terminating resistor and a method for switching it
in or out of the circuit. The line termination switch on the 9605 enables the termination resistor when set on. The
terminating resistors on both 9605's would be enabled in the above example since they are located at either end of
the trunkline. The terminating resistor on the SLC-500 processor and programming terminal must be off.
Summary of Contents for 9605
Page 18: ......
