RLC-SVX14H-GB
69
Communications Interface options
Optional Tracer Communications Interface
This option allows the Tracer CH530 controller to
exchange information (e.g. operating setpoints and
Auto/Standby commands) with a higher-level control
device, such as a Tracer Summit or a multiple-
machine controller. A shielded, twisted pair connection
establishes the bi-directional communications link
between the Tracer CH530 and the building automation
system.
Note: To prevent control malfunctions, do not run
low voltage wiring (<30 V) in conduit with conductors
carrying more than 30 volts.
WARNING Ground Wire!
All field-installed wiring must be completed by qualified
personnel. All field-installed wiring must comply with
local codes and regulations. Failure to follow this
instruction could result in death or serious injuries.
Field wiring for the communication link must meet the
following requirements:
•
All wiring must be in accordance with local codes and
regulations.
•
Communication link wiring must be shielded, twisted
pair wiring (Belden 8760 or equivalent). See the table
below for wire size selection:
Table 23 - Wire size
Maximum Length of
Communication Wire
2.5 mm²
1525 m
1.5 mm²
610 m
1.0 mm²
305 m
•
The communication link cannot pass between
buildings.
•
All units on the communication link can be connected
in a “daisy chain” confi guration.
LonTalk Communications Interface for Chillers (LCI-C)
CH530 provides an optional LonTalk Communication
Interface (LCI-C) between the chiller and a Building
Automation System (BAS). An LCI-C LLID shall be used
to provide “gateway” functionality between a LonTalk
compatible device and the Chiller. The inputs/outputs
include both mandatory and optional network variables
as established by the LonMark Functional Chiller Profi le
8040.
Installation Recommendations
•
0.34 mm² Level 4 unshielded communication wire
recommended for most LCI-C installations
• LCI-C link limits: 1300m, 60 devices
• Termination resistors are required
• 105 ohms at each end for Level 4 wire
• 82 ohms at each end for Trane “purple” wire
• LCI-C topology should be daisy chain
•
Zone sensor communication stubs limited to 8 per
link, 15 m each (maximum)
•
One repeater can be used for an additional 1300 m,
60 devices, 8 communication Stubs
