
3270 3402 A 4
Mounting the enclosure
To mount the enclosure:
1. Using the enclosure as a template, mark the
location of the four mounting holes on the
mounting surface.
2. Set the enclosure aside and drill holes for the
screws at the marked locations.
Drill holes for #10 (5 mm) screws or #10 wall
anchors. Use wall anchors if the mounting
surface is dry wall or masonry.
3. Insert wall anchors if needed.
4. Secure the enclosure to the mounting surface
with the enclosed #10 (5 mm) screws.
Wiring high-voltage ac power
WARNING
Hazardous Voltage!
Before making electrical connections, lock open the
supply-power disconnect switch. Failure to do so
may cause death or serious injury.
CAUTION
Use Copper Conductors Only!
Unit terminals are designed to accept copper
conductors only. Other conductors may cause
equipment damage.
IMPORTANT
Make sure that you have the correct controller model
for 120 Vac or 230 Vac. (see Table 1 on page 1) lists
the available models.
To ensure proper operation of the controller, install
the power supply circuit in accordance with the
following guidelines:
• The controller must receive power from a
dedicated power circuit. Failure to comply may
cause control malfunctions.
• A disconnect switch for the dedicated power
circuit must be near the controller, within easy
reach of the operator, and marked as the
disconnecting device for the controller.
• High-voltage power-wire conduits or wire bundles
must not contain input/output wires. Failure to
comply may cause the controller to malfunction
due to electrical noise.
• High-voltage power wiring must comply with the
National Electrical Code (NEC) and applicable
local electrical codes.
• High-voltage wiring requires three-wire 120/230
Vac service (line, neutral, ground).
Note: The transformer voltage utilization range is
98–132 Vac (120 Vac nominal) or 196–264 Vac
(230 Vac nominal). The panel automatically
detects whether the current is 50 or 60 cycle.
To connect high-voltage power wires:
1. Lock open the supply-power disconnect switch.
2. At the top-right corner of the enclosure, remove
the knockout for ½-inch (13 mm) conduit.
3. Open or remove the enclosure door if it is
already installed.
4. Inside of the enclosure at the top-right corner,
remove the high-voltage area cover plate.
5. Feed the high-voltage power wire into the
enclosure.
6. Connect the line wire to the L terminal (Figure
3).
Figure 3. AC wiring
7. Connect the neutral wire to the N terminal.
8. Connect the green ground wire to the chassis
ground screw. The ground wire should be
continuous back to the circuit breaker panel.
WARNING
Hazardous Voltage!
The cover plate must be in place when the controller
is operating. Failure to replace the cover plate could
result in death or serious injury.
9. Replace the cover plate.
Ground screw
L terminal
N terminal