6
BATTERY & TIME KEEPING
A battery is used to keep time when the unit is without power. Typical
accuracy of the 306 time keeping is less than one minute per month drift. The
battery of a 306 unit does not affect the unit’s memory, all configurations and
data is stored in non-volatile memory.
To change the battery of a 306, remove power, cabling, and then the rear
cover of the unit. To remove the cover, remove the four screws designated by
the arrows on the rear of the unit. Then, by lifting the top side, hinge the cover,
thus providing clearance for the connectors on the bottom side of the PCB as
shown in the illustration below. Install in the reverse manner.
Remove the old battery* from the holder and replace with the new battery.
Replace the rear cover, cables, and re-apply power. Using CTVue Configurator
or the unit’s keypad, enter the correct time and date.
* Please note that the old battery must be disposed of in a manner that
complies with your local waste regulations. Also, the battery must not be
disposed of in fire, or in a manner whereby it may be damaged and its
contents come into contact with human skin.
The battery used by the 306 is a lithium type CR2025.
CAUTION: RISK OF ELECTRIC SHOCK
The inverter board, attached to the mounting plate, supplies
the high voltage to operate the backlight. Touching the
inverter board may result in injury to personnel.
CAUTION
: The circuit board contains static sensitive
components. Before handling the operator interface without
the rear cover attached, discharge static charges from your
body by touching a grounded bare metal object. Ideally,
handle the operator interface at a static controlled clean
workstation. Also, do not touch the surface areas of the
circuit board. Dirt, oil, or other contaminants may adversely
affect circuit operation.
WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT
EQUIPMENT UNLESS POWER HAS BEEN DISCONNECTED
AND THE AREA IS KNOWN TO BE NON-HAZARDOUS.
WARNING - EXPLOSION HAZARD - THE AREA MUST BE
KNOWN TO BE NON-HAZARDOUS BEFORE SERVICING/
REPLACING THE UNIT AND BEFORE INSTALLING OR
REMOVING I/O WIRING AND BATTERY.
O
PTIONAL
F
EATURES AND
A
CCESSORIES
COMPACTFLASH SOCKET
CompactFlash socket is a Type II socket that can accept either Type I or II
cards. Use cards with a minimum of 4 Mbytes and a maximum of 2 Gbytes with
the 306’s CompactFlash socket. Cards are available at most computer and office
supply retailers.
CompactFlash can be used for configuration transfers, larger configurations,
data logging, and trending.
Information stored on a CompactFlash card by a 306 can be read by a card
reader attached to a PC. This information is stored in IBM (Windows
®
) PC
compatible FAT16 file format.
OPTIONAL COMMUNICATION CARD
Control Techniques offers optional communication cards for fieldbus
communications. These communication cards will allow your 306 to
communicate with many of the popular fieldbus protocols.
Control Techniques is also offering a communications card for additional
RS232 and RS422/485 communications. Visit Control Techniques’ website for
information and availability of these cards.
Note: Do not remove or insert
the CompactFlash card while
power is applied. Refer to
“Front Panel LEDs.”
