Power Supply; Charger Functions - Panasonic EBL128 Planning Instructions

Panasonic Electric Works Nordic AB
MEW01090 Rev: 3
20
20.1

Power supply

Main power source
Normally the EBL128 control unit is powered by a built-in Switching
Power Supply (rectifier), 230 V AC / 24 V DC ±1%, 1.8 A).
Second power source
By loss of 230 V AC, etc. EBL128 is powered by built-in back-up
batteries, i.e. two Sealed Lead-Acid batteries, 12 V, 16-18 Ah.
The batteries and the rectifier are connected to the Main board (4556),
which also handles the charging of the batteries.
Figure 36. EBL128 power supply block diagram. Fuse F2:
Ceramic. (One ceramic 2 A fuse is connected, in series,
between the two batteries.)
EBL128 is a very flexible system. The number of and types of loop
units, the number of and types of ext. FBPs, ext. equipment, etc. can
vary from one control unit to another.

Charger functions

According to EN 54-4, section 5.3.1 b) The charger shall be designed
and rated so that a battery discharged to its final voltage can be
recharged to at least 80% of its rated capacity within 24 hours and to
its rated capacity within another 48 hours.
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16 or 18 Ah is depending on manufacturer. Specified "Final voltage"
must be 10.5 V. NOTE! There is no battery incl. in the control unit article
no. 4550xx., i.e. it has to be ordered separately.
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EBL128 Planning Instructions V1.1.x
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