AVG EZTouch I/O Jr., Manual

Page: 40 / 52

EZTouch I/O
Jr.
40 / 52
Maintenance
Hardware Maintenance
Routine maintenance checks should be performed on the unit to avoid any risk of
hardware problems. The
EZTouch I/O
Jr. is designed to be a very rugged controller
so that just a few checks periodically will help keep it up and running.
The key points to be checked include:
· Ambient operating conditions
· Wiring and connections
Maintaining the Ambient Operating Conditions
Keeping the
EZTouch I/O
Jr.‘s environment within specified operating conditions is
the best method to minimize the maintenance.
1.
Always ensure that ambient temperature inside the cabinet is within
EZTouch I/O
Jr.'s temperature ratings.
2.
If any other equipment inside or outside of the cabinet is producing heat,
employ cooling methods like a blower fan to reduce 'hot spots' around the
EZTouch I/O
Jr.
3.
Periodically inspect and clean if there are any air filters on the cabinet. Ensure
that the PLC is free from dust, humidity and corrosive gases.
Changing the Battery
The
EZTouch I/O
Jr. units come with a built in Lithium coin cell battery with a 5
year life expectancy. The steps below outline the process to change the battery in
the
EZTouch I/O
Jr. units. Since only the information saved to the registers/
discretes available on a power cycle will remain intact, please save pertinent
information before attempting to change the battery. Then remove power from the
unit.
1.
Using a small blade screwdriver carefully depress the back cover retainer snap
on both sides of the unit to disengage the snap.
2.
Next, lift off the back cover starting with the side with the retainer snaps and
set the back cover aside.
3.
Lift the circuit board assembly up (no unscrewing is required) so that you