WattMaster Auto-Zone Plus, Проектирование, установка и эксплуатация

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Section 2
Auto-Zone Plus
2-8 Design Guide
Communications Loops
Both the Network Loop and the Local Loops are two wire shielded RS-485. The loops
are best connected in
daisy chain configuration, meaning the loops are connected from
one controller to another. It is not necessary to sequentially address the zone controllers
in relation to their location on the loop. Cable must be Belden No. 82760 or equivalent.
Tip
Incorrect wiring of the communications loop is the most common mistake made
during installation. Before beginning installation, write down the wire color
used on each terminal connection and consistently maintain that color code. It is
recommended that a continuous wire run be made between devices. Anytime a
splice is made in the cable you increase your chance of problems.
Caution:
Make sure when you are inserting wires into the terminal blocks that
strands of wire do not stick out and touch the next terminal. This could
cause a short or erratic operation.
Communications Loop Wiring Overview
The daisy chain is the best method for running a communications loop since there is only
one starting point and one ending point for each of the communications loops. (see
Figure 2-7 ).
Note:
Auto-Zone Plus systems use two separate types of communications loops. The
Network Loop connects only to the Zone Managers and the CommLink II.
The Local Loops connect between the Zone Manager and the Zone
Controllers for that HVAC unit. Each Zone Manager has its own Local Loop
for connection to associated Zone Controllers and any additional Constant
Volume units and the System Manager.
Do not connect zone controllers, constant volume units
or the system manager to the network loop!
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