LYNX LON PROGRAMMABLE, VAV/UNITARY CONTROLLERS – PRODUCT DATA
EN0Z-0957GE51
R0615
7
the controller, such as equipment actuators and various
contactors and transducers.
IMPORTANT
If a controller is used on Heating and Cooling
Equipment (UL 1995; U.S., only) and transformer
primary power is more than 150 volts, connect the
transformer secondary common to earth ground (see
Fig. 10).
When multiple controllers operate from a single
transformer, connect the same side of the transformer
secondary to the same power input terminal in each
device. The earth ground terminal (terminal 3) must be
connected to a verified earth ground for each controller
in the group (see Fig. 11).
Wiring
All wiring must comply with applicable electrical codes and
ordinances, or as specified on installation wiring diagrams.
Controller wiring is terminated to the screw terminal blocks
located on the top and the bottom of the device.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
To prevent electrical shock or equipment damage,
disconnect power supply before beginning wiring or
making wiring connections.
NOTE 1:
For multiple controllers operating from a single
transformer, the same side of the transformer
secondary must be connected to the same power
input terminal in each controller. Controller con-
figurations will not necessarily be limited to three
devices, but the total power draw, including
accessories, cannot exceed 100 VA when powered
by the same transformer (U.S., only). For power
and wiring recommendations, See section “Power”
on page 6. The earth ground terminal (terminal 3)
must be connected to a verified earth ground for
each controller in the group (see Fig. 11).
NOTE 2:
All loads on the controller must be powered by the
same transformer powering the controller itself. A
controller can use separate transformers for con-
troller power and output power.
NOTE 3:
Keep the earth ground connection (terminal 3) wire
run as short as possible.
NOTE 4:
Do not connect the universal input COM terminals,
analog output COM terminals or the digital
input/output COM terminals to earth ground. See
Fig. 15 through Fig. 20 for wiring examples.
The 24 VAC power from an energy limited Class II power
source must be provided to the controller. To conform to
Class II restrictions (U.S., only), the transformer must not be
larger than 100 VA.
Fig. 10 depicts a single controller using one transformer.
IMPORTANT
Power must be OFF prior to connecting to or removing
connections from the 24 VAC power (24 VAC/24 VAC
COM), earth ground (EGND), and 20 Vdc power
(20 Vdc) terminals.
IMPORTANT
Use the heaviest gauge wire available, up to 2.0 mm
2
,
with a min. of 1.0 mm
2
, for all power and earth ground
wiring.
Screw-type terminal blocks are designed to accept up
to one 2.0 mm
2
conductor or up to two 1.0 mm
2
con-
ductors. More than two wires that are 2.0 mm
2
can be
connected with a wire nut. Include a pigtail with this
wire group and attach the pigtail to the terminal block.
IMPORTANT
Connect terminal 2 (the 24 VAC common [24 VAC
COM] terminal) to earth ground (see Fig. 10).
NOTE:
Unswitched 24 VAC power wiring can be run in the
same conduit as the L
ON
W
ORKS
® cable.
NOTE:
Maintain at least a 7.6 cm separation between triac
outputs and L
ON
W
ORKS
® wiring throughout the
installation.
1 2 3 4 5 6 7 8
9
OUTPUT
DEVICE POWER
TRANSFORMER
LINE VOLTAGE
> 150 VAC
COM
24 VAC
EARTH GROUND
(TERMINAL 3)
EARTH
GROUND
WHEN CONNECTING POWER TO THE LYNX LON
CONTROLLER, CONNECT THE COM LEG OF THE VAC
SECONDARY CIRCUIT TO A KNOWN EARTH GROUND.
CONNECT POWER TO
TERMINALS 1 AND 2.
Fig. 10. Power wiring details for one LYNX controller per
transformer
More than one controller can be powered by a single trans-
former. Fig. 11 shows power wiring details for multiple con-
trollers.
NOTE:
Controller configurations are not necessarily limited
to three devices, but the total power draw,
including accessories, cannot exceed 100 VA
when powered by the same transformer (U.S.,
only). For power wiring recommendations, see
section “Power” on page 6.
