AP Expert VT-110, User Manual

Page: 13 / 84

4
Guidelines About Wiring
All wiring instructions are found in the wiring diagram included with this manual. A few additional guide-
lines are needed to wire your controller correctly and safely.
Precautions
The controller has no power switch. You must use an external switch or circuit breaker in the installation
to interrupt power to the Line (L) and Neutral (N) electric power lines. It must be close to the equipment
and within reach of the operator. Mark it as the disconnecting device for the equipment.
DANGER
Turn off all power before connecting wires to avoid electrical shocks and equipment
damage. All wiring must be done by an authorized electrician and must comply with
applicable codes, laws and regulations.
NOTICE
All electrical wiring must enter by the bottom of the enclosure. Use watertight
connectors.
NOTICE
Use nylon cable glands for cable or wiring fastening. Do not install rigid conduits.
Alarm wiring
Two types of alarms exist. For the type of alarm that activates when current is cut off at its input, use the
NC terminal as shown on the wiring diagram. For the other type of alarm that activates when current is
supplied at its input, use the NO terminal.
Sensor input wiring
Sensors operate at low voltage and are isolated from the supply. Make sure that sensor cables remain
isolated from all high voltage sources by a minimum of 12 inches (30 cm). If a sensor is defective, an
alarm is generated. Defective sensors can be seen in the
Alarm menu.
CAUTION
Do not route the sensor cables through the same electrical holes as other cables.
CAUTION
Do not connect the shield from the sensor cable to a terminal or a ground.
Extending a sensor
Each sensor can be extended up to 410 feet (125 meters). Do not run sensor cables next to the other
power cables. If the cables must cross, make them cross at a 90 degree angle.
890-00081 Expert VT-110 13