Normally Closed (NC)
30A @ 277VAC Ballast
20A @ 120VAC Tungsten
20A @ 347VAC Ballast
SCCR 18kA @ 277VAC
Mixed voltages are allowed in accordance with the NEC
and local code requirements.
STATUS LED
LED is ON when the relay is OFF. (Relay is NC.)
RELAY SPECIFICATIONS
INSTALLATION: LINE VOLTAGE WIRING
Torque Specification Instructions
The torque spec for the relay terminal block is 16 in-lbs.
When using a 1” diameter screwdriver (1/2” radius), a
turning force of 32 lbs is required to meet this spec.
Tighten and Wiggle
Copper is ductile, meaning it will compress and flow un-
der pressure. To ensure a good connection in the termi-
nal lug, use the following procedure:
1. Tighten the terminal to the specified torque.
CHASSIS REMOVAL
If the rough-in will create a lot of dust or metal shavings, it
may be best to remove the chassis prior to installation.
INSTALLATION: MECHANICAL (cont’d)
INSTALLATION: LINE VOLTAGE WIRING (cont’d)
2. “Wiggle” the wire: move it slowly from side to side
while gently pulling it away from the lug.
3. Power supply should be supplied from a dedicated
breaker. Land 120V or 277V on appropriate lugs and
Neutral and Ground as indicated.
W
ARNING
: D
O
NOT
POWER
UP
THE
SNAP
INTERFACE
CON-
TROLLER
UNTIL
THE
BUS
HAS
BEEN
ACTIVATED
.
INSTALLATION: LINE FAULT CHECK
You may check for faults while landing conductors on the
relays with the following steps:
1. Land the Line and Load conductors on the same Load
terminal lug. Label the Line wire with the breaker ID.
2. Check the line. Switch breakers on and clear any
faults. Switch breakers off.
3. Move the Line conductor to the Line terminal lug on
each relay once tested.
SNAP
Panel Installation/Configuration
3. Tighten again to the specified torque. Usually this
takes 1/16 to 1/4 of a turn or more.
4. Repeat as needed.
1. Remove the two locking nylon nuts from the line volt-
age backplane (red circles above).
2. With the front plate closed, gently remove the chassis
from the enclosure. Avoid rubbing the sides of the chas-
sis against the enclosure
3. Store the chassis in the original shipping case or a
safe location until needed. Replace nylon nuts so they
don’t get lost.
