Digital I/O Signals; Alarm Signals - Datex-Ohmeda Cardiocap/5 Series Technical Reference Manual

Cardiocap/5 Technical Reference Manual

5.5.4 Digital I/O signals

The different I/O-signals have been split into groups according to their function:
• Defibrillator synchronization output.

• Alarm signals.

• PWR-board control signals.
Defibrillator synchronization output
Each detected QRS complex generates a 10 ms long, 5V pulse to pin 3 of the rear panel 44-pin I/O
connector.
Alarm signals
In addition to audible alarms, the CPU board drives the Alarm LEDs on the monitor front panel and a
NURSE_CALL signal on 44-pin I/O connector pin 5. The processor's I/O pins directly drive the Alarm
LEDs. The PLD generates the NURSE_CALL signal, which is in high state when the alarm is active. In
addition to the digital nurse-call signal, floating relay contacts are available on pins 11 and 12. The
relay located on the I/O board connects the pins when the nurse-call signal is active.
Power supply board control signals
The control signals for the DC/DC board come directly from the processor's I/O-pins:
X5 pin
3
4
5
6
7
8
9
10
11
13
14
16
The interrupts generated by the DC/DC board come directly to the processor's I/O pins:
X5 pin
16
17
18
19
21
5-20
Signal name Function
STOP# Shut off +3.3V and +5V switchers
POW_WD Watchdog refresh
EN_VIN12V Enable VIN_12V
EN_12V Enable +12V
EN_15VB Enable +/- 15V circuit breaker
EN_15V Enable +/- 15V switcher
EN_15VD Enable +/- 15VD circuit breaker
CHG_INH Disable charger input v. VCHG
BAT_TEST Connect battery test load
PWR_RESET +3.3V and +5V reset disables all other control signals from CPU board to
power supply boards
ICHG_LOW Reduce battery charge current
FAN_ON Enable VFAN
Signal name Function
OC_15VB# Boost converter over-current interrupt
OC_15VD# +15VD over-current interrupt
OV_15VB# +15VB over-voltage interrupt
CHG_ON# Battery high-charge on
VDD/TEMP_OK VDD detect/Temp OK