Parker PAC, Руководство по установке, Страница: 187 / 197

When 24VDC power is applied to the PAC Controller input connector, no current drain is required from the
RTC battery. Conversely, if the 24VDC power is removed for periods of time such as during shipping or if
the Controller is shut down over nights and weekends, small amounts of battery current consumption will
be required. The battery life expectancy is dependent on how long DC power is provided to the PAC; the
longer that DC power is applied to the PAC over a period of time, the less battery drain will be required to
power the RTC circuit. Current consumption calculations indicate that if DC power is never applied to the
PAC, the battery powered RTC should keep time for at least 5 years. If DC power is applied to the PAC
about 50% of the time, then the RTC should keep time for more than an estimated 9 years. Note that
elevated temperatures can also have a negative effect on battery life.
Should the PAC lose its time and date time keeping after an extended period, the battery needs to be
replaced. The Controller can be returned to the factory to have the battery replaced as a repair order, or
the battery can be simply replaced by the customer. The replacement battery is an industry standard
CR2032 lithium coin cell and is easily obtainable. To replace, simply remove the cover from the PAC
Controller, locate the battery on the top side of the processor board, and slide the old battery from the
holder. Observe the correct battery orientation (PLUS [+] down) when inserting the new battery. Follow
local ordinances to properly dispose of the old battery. Reattach the plastic cover and reconnect the
Controller to the PACIO modules on the DIN rail. Be sure to use the PAC Configuration Tool to set the
correct time and date before recommissioning the system.
Technical Assistance from Parker Hannifin
Contact Information for Technical Assistance
Contact your local automation technology center (ATC) or distributor.
North America
Parker Hannifin
Electromechanical Automation North America
5500 Business Park Drive
Rohnert Park, CA 94928
Telephone: (707) 584-7558
Fax: (707) 584-8029
Email: emn_support@parker.com
Internet: http://www.parkermotion.com
Europe
Parker Hannifin
Electromechanical Automation Europe
Robert-Bosch-Strasse 22
77656 Offenburg (Germany)
Telephone: +49 (0781) 509-0
Fax: +49 (0781) 509-98176
Email:
Em-motion@parker.com
Internet: www.parker-automation.com