Parker PAC, Installation Manual, Page: 25 / 197

Correct (Vertical)
X
Incorrect (Sideways)
X
Incorrect (Horizontal)
X
Incorrect (Upside-down)
Radiated Emissions Guidelines
The PAC and PACIO Modules have been tested to comply with international electromagnetic and emission
standards (IEC/EN61010-1). To reduce radiated emissions, ensure that there is a low impedance earth
connection to the PAC, which can be accomplished by attaching the DIN rail to a suitable Earth ground and
also utilizing Pin-3 on the Controller 24VDC power input connector. This connection must be made with
the shortest possible, heavy gage wire or braided cable. Low-resistance (<0.5 ohms) continuity should be
verified with an ohmmeter for proper grounding. In addition, all communication cables should be shielded
and grounded, preferably only on one end.
Earth Grounding Guidelines
To minimize unwanted electrical interference, select a location away from equipment that produces
intense electrical noise (motor drives, for example). Use good engineering practice and isolate input power
to the unit and separate all data communication cables from AC power lines.
Important: Use the Controller ground terminal (Pin-3 on the 24VDC power
connector) to connect the unit to a suitable ground reference, such as
earth ground or building steel. This ensures the unit is in compliance
with immunity and emissions requirements necessary for proper
operation.