Thermo Technologies USDT 3000 User Manual

Page 6

ower Connections: A small blade screwdriver may be used to fasten miniaturized
terminal block screws while the corresponding wire is inserted.

NOTE 1: Always disconnect the controller from power supply before opening the housing.

NOTE 2: The controller should be properly grounded. Flexible wires, 18/3 AWG
(gauge/conductor), simplify connection to the terminals. The power terminal block will
accommodate wire sizes to 14 AWG. All other connections should be secured and adequately
tightened, as loose power connections will over-heat, and may cause fire.

NOTE 3: It is important that the specified output loads (245 Watts) are not exceeded. Where
these loads expect to exceed, external relays must be used. Always keep power cables away
from sensor cables and other low voltage signal cables.

NOTE 4: To protect against lightning damage, the system must be grounded according to local
regulations. Sensor failures due to the weather or electrostatic are mostly due to poor grounding.