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SPYDER® LON PROGRAMMABLE, VAV/UNITARY CONTROLLERS
62-0287—03 6
NOTES:
— For multiple controllers operating from a single
transformer, the same side of the transformer sec-
ondary must be connected to the same power
input terminal in each controller. Controller config-
urations will not necessarily be limited to three
devices, but the total power draw, including
accessories, cannot exceed 100 VA when pow-
ered by the same transformer (U.S. only). For
power and wiring recommendations, see “Wiring”
on page 5 The earth ground terminal (terminal 3)
must be connected to a verified earth ground for
each controller in the group (see Fig. 12 on
page 7).
— All loads on the controller must be powered by the
same transformer that powers the controller itself.
A controller can use separate transformers for
controller power and output power.
— Keep the earth ground connection (terminal 3)
wire run as short as possible.
— Do not connect the universal input COM
terminals, analog output COM terminals or the
digital input/output COM terminals to earth
ground. Refer to Fig. 10–Fig. 12 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
14 AWG (2.0 sq mm), with a minimum of 18 AWG
(1.0 sq mm), for all power and earth ground wiring.
Screw-type terminal blocks are designed to accept
up to one 14 AWG (2.0 sq mm) conductor or up to
two 18 AWG (1.0 sq mm) conductors. More than two
wires that are 18 AWG (2.0 sq mm) can be con-
nected with a wire nut. Include a pigtail with this wire
group and attach the pigtail to the terminal block.
IMPORTANT
If the controller is used on Heating and Cooling
Equipment (UL 1995, U.S. only) and the
transformer primary power is more than 150 volts,
connect terminal 2, (the 24 Vac common [24 VAC
COM] terminal) to earth ground (see Fig. 11). For
these applications, only one controller can be
powered by each transformer.
NOTES:
— Unswitched 24 Vac power wiring can be run in the
same conduit as the L
ONWORKS® cable.
— Maintain at least a 3 in. (7.6 cm) separation
between Triac outputs and L
ONWORKS® wiring
throughout the installation.
Fig. 10. Power wiring details for one controller
per transformer.
Fig. 11. Transformer power wiring details for one
controller used in UL 1995 equipment (U.S. only).
More than one controller can be powered by a single
transformer. Fig. 12 shows power wiring details for multiple
controllers.
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 “Wiring” on page 5.
CONNECT POWER TO
TERMINALS 1 AND 2
EARTH
GROUND
(TERMINAL 3)
TRANSFORMER
OUTPUT
DEVICE
POWER
M23557
A
ΔP
1
2
3 4 5 6
7 8
1 0 9 2 3 4 5 6 7 8 0 9
1 1 1 1 1 1 1 1 1 2 1
1
2
3 4
5
6
7 8
0
9
2
2 2
2 2
2
2
2 2
3
3
1
2
3 4
5
6
7 8
0
9
3
3
3
3 3
3 3
3 4
COM
24 VAC
M23558A
EARTH
GROUND
(TERMINAL 3)
TRANSFORMER
OUTPUT
DEVICE
POWER
ΔP
1
2
3 4 5 6
7 8
1 0 9 2 3 4 5 6 7 8 0 9
1 1 1 1 1 1 1 1 1 2 1
1
2
3 4
5
6
7 8
0
9
2
2 2
2 2
2
2
2 2
3
3
1
2
3 4
5
6
7 8
0
9
3
3
3
3 3
3 3
3 4
EARTH
GROUND
1
LINE VOLTAGE
GREATER
THAN 150 VAC
IF THE CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE
PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND 24 VAC COM
SIDE OF TRANSFORMER SECONDARY.
1
COM
24 VAC
CONNECT POWER TO
TERMINALS 1 AND 2