EPS BC 800 R Series, Instruction Manual

Page: 19 / 28

19
Instruction Manual
BC 800 R Series
EN
Date: 02-09-2012
In order for the user to notice temperature related er-
rors, the LED keeps flashing even if the temperature
is within the normal range again. Starting the charging
again or switching to power supply mode will erase
the error and LED will stop flashing, if the temperature
is OK.
Temperature sensors of type LM335 or similiar, which
are specified with 10mV/K temperature voltage, can
be used. Pin 1 delivers approx. 4.1V and currents from
0.8mA (internal 1k in series to the temp sensor).
The temperature compensation of the charging voltage
is done with 4mV/°C and per battery cell.
3.5 Remote sense
In order to compensate voltage drops along the load
leads, the device features remote sense inputs on
the front. Here the sensed voltage from the battery
is connected with correct polarity. Remote sense can
compensate up to 2V.
When not using the sense inputs, they just remain open.
It is not required to bridge them to the output.
The cross section of the sense leads is non-critical.
3.6 Power supply mode
The device can be used as power supply, if „Power
Supply Mode“ has been selected. The output voltage
can then be adjusted with the trimmer within a limited
range (see technical specifications).
It either works in constant voltage or in constant current
operation (U-I characteristics).
This mode is suitable for parallel standby operation,
see „5.7 Parallel standby operation“.
3.7 Overvoltage protection (OVP)
All models feature an overvoltage protection circuit. In
case of an overvoltage condition, whether caused by an
internal defect or by external reasons, the power output
is switched off and the error is indicated by flashing LED
„Error“ and also by pin 9 of the analogue interface. After
the OV condition is gone, the output can be switched
on resp. the charging can be started again.
3.8 Overtemperature (OT)
All models also feature an internal temperature super-
vision. In case of overheating, the power output will
be temporarily switched off until the device has cooled
down, and then automatically switch on again.
Charging is thus only interrupted, but not stopped. The
condition is indicated by flashing LED „Error“ and by
pin 9 of the analogue interface.
Functional description
3.9 Errors
Any error is indicated by flashing LED „Error“. Following
error sources can be detected:
• Connection of battery with too low or too high voltage
• Temperature sensor failure (broken wire etc.)
• Overvoltage (OVP)
• Overtemperature (OT)
• Battery connected with false polarity
The errors OVP and OT are also indicated at the ana-
logue interface.
3.10 Remote control
All models feature a 12 pin analogue interface on the
front of the device. It can be used to monitor the device
condition, as well as remotely start/stop the charging
procedure. Also see page 18 and up.
3.11 Automatic charging mode
This extra mode can be activated to start charging of
batteries automatically after mains supply is switched
on or if a battery is connected. For details see „5.10
Activate automatic charging mode“.