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Key Switch Inputs
Volt free contacts on a key switch or other control device can be wired across terminal J3,
which is, situated behind the PDT Power Series front cover. The contacts should be Normally
Open, closing when the PDT Power Series is required. The unit will stay active for 25/45
seconds after the contacts are opened, or for as long as the contacts are closed up to a
maximum time of 5 mins, at which point an auto shut down will occur. This is to safeguard
against a stuck closed key switch from discharging the batteries.
ROUTING YOUR CABLE:
On the bottom of the front cover, you need to notch out a small piece of the plastic in the
middle, large enough to fit your wire into and get the front cover to push flush against the unit.
MAINTENANCE
The PDT Power Series requires very little maintenance. Follow these practices to prevent
problems.
Cleaning the Unit
The following will help ensure trouble-free operation for years:
•
Vacuum dust from the ventilation intake occasionally (Vertical slots on sides).
•
Wipe the cover periodically with a dry cloth.
Maintaining Batteries
The batteries are valve-regulated, nonspillable, lead acid and must be kept charged to retain
their design life. The unit continuously charges the batteries when connected to the mains
supply, even while the unit is switched off.
When storing the unit, it is recommended to plug it in for at least 24 hours every four to six
months to ensure full recharge of the batteries.
Battery Replacement
CAUTION
A battery can present a risk of electrical shock and high short circuit current.
The following precautions should be observed before replacing the batteries:
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This unit is equipped with internal "hot swappable" batteries that the user can replace without
shutting the unit down or connected loads.
NOTE
Caution should be exercised when replacing the batteries because the load is
unprotected from disturbances and power outages during this procedure.
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Remove rings, watches, and other metal objects.
Do not lay tools or other metal objects on top of the batteries.
If the battery replacement kit is damaged in any way or shows signs of
leakage, contact P D Technology immediately.
Do not dispose of batteries in a fire. The batteries may explode.
Dispose of old batteries according to local codes.
01926 463888
14
01926 463888
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Troubleshooting
