Johnson Controls LX Series Installation Instructions

LX Series Free Programmable LX-PRGxxx-11 Controllers Installation Instructions4
Use an external fuse on the 24 VAC/DC side
(secondary side) of the transformer to protect all
controllers against power link spikes (Figure 3 and
Figure 4).
Note: Connecting the power source to an electrical
system ground is not a requirement for proper system
operation. However, it is a good installation practice in
order to maintain the same potential between all
controllers and protective earth.
Configuration Jumper Location and
Identification
Controllers have the following onsite-configurable
jumpers.
IMPORTANT: Maintain consistent polarity when
you connect the controllers and devices to the
transformer.
IMPORTANT: Connect the COM terminal of each
controller and each peripheral to the same terminal
on the secondary side of the transformer. One
terminal on the secondary side of the transformer
must be connected to the building’s ground. Failure
to maintain consistent polarity throughout the entire
network will result in a short circuit and damage to
the controller.
IMPORTANT: The COM terminals of the controller
are internally wired to the 24 V COM terminal of the
power supply. Connecting a peripheral or another
controller to the same transformer without
maintaining polarity between these devices will
cause a short circuit.
Figure 3: Power Wiring - DC
Figure 4: Power Wiring - AC
Figure 5: LX-PRG203-11 Controller Jumper
Locations
* Factory-
default position
Subnet
Port
Wireless
Port
Net to Subnet Settings
Enabled Disabled*
Figure 6: LX-PRG300-11 Controller Jumper
Locations
*
Factory
-default positions
Universal Outputs
(UO)
0-10V / 0-20mA Select
0-10V*
0
-
20mA
Subnet
Port
Wireless
Port
Universal Inputs
(UI)
0-20mA Enable / Disable
0-20mA
Disable*
0
-
20
mA
Enable
L ON W ORKS Network Board
Net to Subnet Settings
Enabled Disabled*

Johnson Controls LX Series Specifications

General

Brand	Johnson Controls
Model	LX Series
Category	Air Conditioner
Language	English