2. Technical System Description 1/2010 2 - 49
BA-TE-DE08C M.KAY
Dialog+ SW9xx_sm_Chapter 2_1-2010.doc/pdf <100329> yymmdd
B. Braun Avitum AG
Dialog
+
SW 9.xx
2.22.7 Signals
AKAL
Audible alarm (LLC)
AKAL_S
Audible alarm (LLS)
AKKU_EN
Enable battery operation (possible in therapy mode only)
AKKU_LADEN
Signal for external LED (on front panel board) – charging of battery
/AKKU_OK
Load status of the battery
B24OFF
+24 VGB ON/OFF (LLS)
B24OK
+24VGB OK
D24OFF
+24 VGD ON/OFF (LLS)
D24OK
+24VGD OK
/DIR_ON
Jumper X101 – is used to switch on the power supply without using the
/REM
signal and deactivates the alarms. (The watchdog signal for the function of the
heater (
H_DIN
) is still required to drive the heater.)
/EXT_ON
The machine can be switched on with this signal (see menu
1.26 Battery
Option
: external
ON
).
EXT_STATE
Status for external switch-on possibility (e.g. central disinfection),
simultaneously input and output; the signal is looped through (connector P14/3
= input).
H_DCLK
Clock signal for heater data from LLC. The
H_DCLK
Signal is an open-collector
signal and is generated by the LLC. The
H_DCLK
Signal is used to send the data
at
H_DIN
to the microcontroller.
0
,
1
Data clock
H_DIN
The
H_DIN
signal is an open-collector signal, is generated by the LLC and sent
to the microcontroller (data to control the heater).
0
Half wave of mains voltage: heater switched off
1
Half wave of mains voltage: heater switched on
/H_PROG
Programming mode for heater data. The
/H_PROG
signal is an open-collector
signal and is generated by the LLC.
0
Programming mode
1
No programming mode
/MSWITCH
Mains switch
PERSR_N
Staff call from SMPS-MC
PF
Power fail (power failure)
/REM
Remote signal of LLC (clock on digital board)
WD_S
Watchdog LLS
2.22.8 Internal Signals
/PF
Power fail for the power supply monitoring
Watchdog
A watchdog is integrated to prevent a permanent unintentional drive of the
heater in case of an LLC reset. The watchdog is retriggered by the LLC with
< 2 s. The
H_DIN
signal is used for triggering. The watchdog prevents a drive of
the heater for t = 10 s after the switch-on of the switch mode power supply.
The watchdog has no safety function and is therefore not tested before the
therapy starts.
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