
Document Edition 1.3
Pa e 7 of 12
Network Communication
The controller communicates on Delta Controls LINKnet net ork through the Service Tool Port or an RS-485
connection.
MS/TP (RS485) Wirin
For detailed information on LINKnet iring refer to Delta Controls Wiring Guidelines.
The proper specified cabling must be used to ensure reliable communications. (22-24 AWG
t isted pair, 100-120 ohms impedance, 17 pF/ft or lo er capacitance, ith a braided or aluminum
foil shield.)
Controllers should al ays be ired together in a daisy-chain fashion. Attempting to connect them
using a starred or bus configuration ill cause problems on the net ork.
Net orks ith a total length greater than 4000 ft or ith more than 50 controllers require a
repeater (RPT-768).
LINKnet net orks that have only 1-2 controllers, and have less then 100 ft of cable length do not
require net ork terminators.
When using this product special consideration must taken into ho the product is installed. The follo ing are
guidelines on ho to apply this product.
The DRP-T0B must be connected to a DSC controller. The DAC controllers do not have enough
memory to support the functionality required.
The DRP-T0B communicates only on LINKnet.
The Service Tool Port on all controllers (except the DLC) is internally connected to NET1. This
means that if you ant to connect the controller to NET2 the supplied Service Tool Cable cannot
be used. The controller must be hard ired ith the connections in the back on the controller.
If using an Ethernet DSC the DRP-T0B can be connected to the DSC ith the supplied Service
Tool Cable.
If using a non Ethernet DSC that is net orked, the DRP-T0B must be connected using the
connections on the back of the controller.
The follo ing diagram sho s the net ork configuration hen using an Ethernet DSC.