TD 93021US
17 July 2017 / Ver. PF3
14
Installation Guide
teleCARE IP
Caution:
Connect the negative (-) lead of the teleCARE IP System to the 4L1 terminal and the
positive (+) lead to the 4L2 terminal.
Re-energize the power supply.
4.2.2 Power Supply (Seismic) Operation and Maintenance
The HPFF8 Power Supply should be tested at least once a year for proper operation. Under normal load
conditions, the DC output voltage should be checked for proper voltage level, which is 24Vdc for the
teleCARE IP system.
Under normal load conditions, check that the battery is fully charged. Check for the specified voltage
(24Vdc) at both the battery terminals and power supply board terminals marked [+BAT-] to ensure there is
no break in the battery connection wires.
Note:
• The maximum charging current under discharge is 0.75 amperes.
• Expected battery life is 5 years. However, it is recommended to change the batteries in 4 years, or
less if needed.
The HPFF8 provides supervised functions of the field wiring for the following adverse conditions:
• Field-wiring fault (short or open) on the teleCARE IP power bus.
• AC failure or brownout at the power supply.
• Battery failure (no battery or battery voltage less than 20.5Vdc) condition at the power supply.
• Battery charger failure on the power supply.
• Ground fault condition.
• +/- Reference Resistor
There are 8 LEDs on the Control Circuit Board for indicating normal and trouble operation of the HPFF8
Power Supply (see Figure 1.1 in the HPFF8 Installation Manual.) When viewed from top to bottom, the
LEDs operate as follows: