Upi Board Output Signals; Digital Outputs - Datex-Ohmeda AS/3 Compact Monitor Technical Reference Manual

4.8 UPI Board Output Signals

The analog and digital connector X2 on the UPI Board, can be used to interface other devices to the
Compact Monitor. Pin assignments are listed in table 4-3.
WARNING Always make sure that the combination complies with the international safety
standard IEC 60601-1-1 for medical electrical systems and with the
requirements of local authorities.

4.8.1 Digital Outputs

The digital output signals are as follows:
Defibrillation Sync
The defibrillation sync signal is generated by the ECG. When activated, the signal is set to a high
state and then set back to a low state after 10 ms. The signal is regenerated only after returning to
the low state. The high state ranges from 2.8 to 5 V while the low state ranges from 0 to 0.8 V. The
delay from the R wave peak to the start of the signal is maximally 35 ms.
Nurse Call
The nurse call signal is generated by red, yellow and white alarms. When activated, the signal is set
to a high state and remains at a high state until the alarm situation is over or the Silence Alarm
key is pressed. The high state ranges from 2.8 to 5 V while the low state ranges from 0 to 0.8 V.
Pacemaker Sync
The pacemaker sync signal is generated by pacemaker pulses on the ECG. When activated, the
signal is set to a high state and then set back to a low state such that the signal pulse width is
between 0.5 to 2.5 ms. The high state ranges from 2.8 to 5 V while the low state ranges from 0 to
0.8 V.
Table 3
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Analog and Digital Connector Pin Assignments
Signal
GND
Digital input 3
Digital output 0, Defibrillation sign
Digital input 2
Digital output 1, Nurse call
Digital output 3
Ground
Digital output 2, Pacemaker sign
Analog input, Ch3
Analog output Ch 5
Not connected
Not connected
Analog input, Ch 0
Analog output, Ch 1
+5 V
Analog output, Ch 4
General Service Guide
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