iWorx® HPU2
502-025, Effective: April 12, 2011
7
© 2011 Taco Electronic Solutions, Inc.
Grounding the Device
The ground terminal (T40) must be securely connected to earth ground. Failure to properly ground this
equipment will result in improper operation. Improper grounding may also increase the risk of electrical
shock and may increase the possibility of interference with radio/TV reception.
For best performance, connect the power supply common terminal (T38) to the same external point as the
ground terminal (T40).
WIRING INFORMATION
WARNING
: Terminals 4 and 6 are connected internally on all HPU2 controllers. Disconnect
ALL
power
sources when installing or servicing this equipment to prevent electrical shock or equipment damage.
Figure 2: HPU2 Wiring Example - Power Sourcing
