Funktional Description; Adjusting The End-Of-Charging Voltage - Honeywell 026593.10 Mounting And Connection Instructions

12
When installing the power supply unit in the central housing, ensure that the isolating shield is placed between
the bottom of the housing and the lower side of the board. Also ensure that the device is firmly screwed to the
bottom of the housing.
The ground conductor connected to the supply circuit must be connected close to the connecting terminals of
the supply voltage.
When connecting the power line (NYM 3 x 1,5 mm²) make sure that the minimum air gaps (4mm) and creep
distances (5mm) between the electronic components or the peripheral devices and the power line are observed.
If the neutral conductor cannot be clearly identified, a second fuse protection must be provided in the supply
circuit enabling a 2-pole separation from the supply circuit. After installation, fit the covers supplied to prevent
inadvertent manual contact with the connecting terminals.
3.4.1

Funktional description

Two independent control loops are mounted on the mother board.
First control loop:
Second control loop: This is used to charge the batteries. The charging current is limited to 120 mA.
The end-of-charging voltage of the battery charging unit is correctly set in the factory for
batteries of the A500 series. If it is necessary to change the setting, proceed as described in the chapter

"Adjusting the end-of-charging voltage".

Not stabilized power supply U
The suppy voltage for the central unit and the external consumers need not be adjusted.
Switching the power supply off:
Faults:
3.4.2 Adjusting the end-of-charging voltage
1. The power supply must have reached the operating temperature. This requires the power supply to be
switched on for at least two hours with rated load and closed housing.
2. Connect the charged battery.An incompletely charged battery causes an incorrect adjustment!
It supplies the central unit and the connected readers.
Protected with 2,0 AF (including external consumers).
The battery charging current is monitored and tracked depending on the temperature by
means of an NTC resistor.
A not stabilized direct current voltage is available for external consumers
ext.
(e.g. door strike).
If, during battery operation, the battery voltage
power supply to the central unit and the external consumers is switched
off (cutoff relay). Thus, unpredictable reactions in case of undervoltage
are avoided and the battery is protected against total discharge.
The messages are issued via the outputs
Fault (ST1/3), HIGH active
The following fault causes are possible:
Power (mains) / ext. consumers / charging controller defective /
Battery defective or missing
Power supply (ST1/6), output, HIGH-aktiv.
This output is active when the power is on.
Mounting and Connection Instructions - Door module RS485
Sonnenschein
falls below 9.5V , the